Carbon最新文献

英文中文

Structure reconstruction strategy for controlled pore closure via surface coating in coal-based hard carbon for enhancing sodium storage performance

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-03 DOI: 10.1016/j.carbon.2025.120085

Guokan Liu , Jialiang Yuan , Zhuangzhi Li , Haoyu Li , Chi Wang , Zeng Zeng , Changyan Hu , Jiangong Yang , Bo Yuan , Jie Zhang , Zhenguo Wu

Coal-based hard carbon is considered the most promising anode material for sodium-ion batteries (SIBs) due to its low cost and high abundant resources. However, high-temperature carbonization yields a highly ordered microstructure with few closed pores, limiting sodium storage and initial Coulombic efficiency (ICE). Herein, we propose a structural reconstruction strategy utilizing liquid-phase surface coating of porous carbon with soft carbon. The pitch-derived soft carbon can coat the open pores of porous carbon, facilitating the transition from exposed to closed pores. And the coating layers characterized by a highly ordered microcrystalline structure, significantly reduce surface defects and thereby enhance the ICE. Furthermore, the improved uniform mixing of pitch solution and porous carbon promotes robust cross-linking, mitigating small molecule volatilization and increasing carbon yield. Benefiting from these increased closed pores and stable structure, the optimized BCPC-10 delivered a superior capacity of 326.7 mAh g⁻¹ with high ICE of 86.7 % and excellent cycling stability with 87.2 % retention after 100 cycles. Moreover, the assembled full-cell achieved excellent capacity retention rate of 80.1 % after 200 cycles. The proposed strategy of coating porous carbon with soft carbon undoubtedly offers a promising avenue for developing advanced coal-based anode materials for commercial SIBs.

{"title":"Structure reconstruction strategy for controlled pore closure via surface coating in coal-based hard carbon for enhancing sodium storage performance","authors":"Guokan Liu , Jialiang Yuan , Zhuangzhi Li , Haoyu Li , Chi Wang , Zeng Zeng , Changyan Hu , Jiangong Yang , Bo Yuan , Jie Zhang , Zhenguo Wu","doi":"10.1016/j.carbon.2025.120085","DOIUrl":"10.1016/j.carbon.2025.120085","url":null,"abstract":"<div><div>Coal-based hard carbon is considered the most promising anode material for sodium-ion batteries (SIBs) due to its low cost and high abundant resources. However, high-temperature carbonization yields a highly ordered microstructure with few closed pores, limiting sodium storage and initial Coulombic efficiency (ICE). Herein, we propose a structural reconstruction strategy utilizing liquid-phase surface coating of porous carbon with soft carbon. The pitch-derived soft carbon can coat the open pores of porous carbon, facilitating the transition from exposed to closed pores. And the coating layers characterized by a highly ordered microcrystalline structure, significantly reduce surface defects and thereby enhance the ICE. Furthermore, the improved uniform mixing of pitch solution and porous carbon promotes robust cross-linking, mitigating small molecule volatilization and increasing carbon yield. Benefiting from these increased closed pores and stable structure, the optimized BCPC-10 delivered a superior capacity of 326.7 mAh g<sup>−1</sup> with high ICE of 86.7 % and excellent cycling stability with 87.2 % retention after 100 cycles. Moreover, the assembled full-cell achieved excellent capacity retention rate of 80.1 % after 200 cycles. The proposed strategy of coating porous carbon with soft carbon undoubtedly offers a promising avenue for developing advanced coal-based anode materials for commercial SIBs.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120085"},"PeriodicalIF":10.5,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanostructure engineering of superhard nano-polycrystalline diamond by compressing different fullerene precursors

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-02 DOI: 10.1016/j.carbon.2025.120078

Xuyuan Hou , Yaping Zhao , Yuchen Shang , Fangren Shen , Bingze Wu , Desi Chen , Zhaodong Liu , Mingguang Yao , Bingbing Liu

Nano-polycrystalline diamond (NPD) is an important material with great application potential in various fields, including tool machining, high-pressure science, etc. Due to the strong covalent bonding structure, introducing controllable nanostructures, such as dislocations and twinned boundaries, into NPD to tune its properties remains challenging and our understanding of the underlying mechanism is also limited. In this work, we discovered a fundamentally important factor/mechanism that influences the formation of nanostructures in NPD, i.e., the reactivities of C–C bonds on fullerene cages affect the formation of intermediate phases and thus the final formed NPD. Our experiments and simulations reveal that the lower reactivity of C–C bonds on C₇₀ cages leads to more ordered graphitic carbon formation, while C₆₀ tends to amorphization under the same HPHT. This results in more complex twinning and stacking faults in the synthesized NPD from C₇₀ than C₆₀ through different transition mechanisms via the intermediate phases. The as-synthesized NPD samples from different fullerenes thus exhibit tunable hardness (85.5–101.7 GPa) and optical properties. Our findings provide new insights into the formation mechanism of diamond nanostructures and propose a new strategy to tune the nanostructures of the synthesized NPD for harder and stronger materials.

{"title":"Nanostructure engineering of superhard nano-polycrystalline diamond by compressing different fullerene precursors","authors":"Xuyuan Hou , Yaping Zhao , Yuchen Shang , Fangren Shen , Bingze Wu , Desi Chen , Zhaodong Liu , Mingguang Yao , Bingbing Liu","doi":"10.1016/j.carbon.2025.120078","DOIUrl":"10.1016/j.carbon.2025.120078","url":null,"abstract":"<div><div>Nano-polycrystalline diamond (NPD) is an important material with great application potential in various fields, including tool machining, high-pressure science, etc. Due to the strong covalent bonding structure, introducing controllable nanostructures, such as dislocations and twinned boundaries, into NPD to tune its properties remains challenging and our understanding of the underlying mechanism is also limited. In this work, we discovered a fundamentally important factor/mechanism that influences the formation of nanostructures in NPD, i.e., the reactivities of C–C bonds on fullerene cages affect the formation of intermediate phases and thus the final formed NPD. Our experiments and simulations reveal that the lower reactivity of C–C bonds on C<sub>70</sub> cages leads to more ordered graphitic carbon formation, while C<sub>60</sub> tends to amorphization under the same HPHT. This results in more complex twinning and stacking faults in the synthesized NPD from C<sub>70</sub> than C<sub>60</sub> through different transition mechanisms via the intermediate phases. The as-synthesized NPD samples from different fullerenes thus exhibit tunable hardness (85.5–101.7 GPa) and optical properties. Our findings provide new insights into the formation mechanism of diamond nanostructures and propose a new strategy to tune the nanostructures of the synthesized NPD for harder and stronger materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120078"},"PeriodicalIF":10.5,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143230287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A dislocation perspective on heterointerfacial strengthening in nanostructured diamond and cubic boron nitride composites

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2025.120079

Hanqing Wei , Haifei Zhan , Dominik Legut , Shihao Zhang

The nanometer-scale diamond/cBN (C/BN) heterointerface is believed to significantly enhance the mechanical properties of diamond-cBN nanocomposites, however, the underlying mechanisms remain largely unexplored and poorly understood. In this study, we conduct a comprehensive investigation of the dislocation slip resistance at perfect C/BN heterointerfaces and their corresponding nanotwinned and stacking-faulted structures, utilizing the ab initio-informed Peierls-Nabarro model. Our findings show that the nanotwinned defects at the heterointerface, characterized by negative formation energy, are more thermodynamically stable than those in the cBN and diamond bulk. Stacking faults tend to favor the cBN side over the diamond side at the heterointerface, which is consistent with experimental observations. The perfect C/BN heterointerface exhibits notably lower slip resistance to parallel dislocation than bulk diamond and cBN due to shear-induced Friedel oscillation. Conversely, a much higher dislocation slip resistance is observed at the nanotwinned and stacking-faulted C/BN heterointerfaces than that of bulk cBN, suggesting that the mirror symmetry presented across the nanotwinned and stacking-faulted heterointerfaces offers an effective strategy for strengthening. These insights not only offer a novel perspective on the ubiquitous heterointerfacial strengthening in diamond-cBN nanocomposites, but also underscore the pivotal role of atomic-scale interfaces in designing superhard nanostructures.

{"title":"A dislocation perspective on heterointerfacial strengthening in nanostructured diamond and cubic boron nitride composites","authors":"Hanqing Wei , Haifei Zhan , Dominik Legut , Shihao Zhang","doi":"10.1016/j.carbon.2025.120079","DOIUrl":"10.1016/j.carbon.2025.120079","url":null,"abstract":"<div><div>The nanometer-scale diamond/cBN (C/BN) heterointerface is believed to significantly enhance the mechanical properties of diamond-cBN nanocomposites, however, the underlying mechanisms remain largely unexplored and poorly understood. In this study, we conduct a comprehensive investigation of the dislocation slip resistance at perfect C/BN heterointerfaces and their corresponding nanotwinned and stacking-faulted structures, utilizing the ab initio-informed Peierls-Nabarro model. Our findings show that the nanotwinned defects at the heterointerface, characterized by negative formation energy, are more thermodynamically stable than those in the cBN and diamond bulk. Stacking faults tend to favor the cBN side over the diamond side at the heterointerface, which is consistent with experimental observations. The perfect C/BN heterointerface exhibits notably lower slip resistance to parallel dislocation than bulk diamond and cBN due to shear-induced Friedel oscillation. Conversely, a much higher dislocation slip resistance is observed at the nanotwinned and stacking-faulted C/BN heterointerfaces than that of bulk cBN, suggesting that the mirror symmetry presented across the nanotwinned and stacking-faulted heterointerfaces offers an effective strategy for strengthening. These insights not only offer a novel perspective on the ubiquitous heterointerfacial strengthening in diamond-cBN nanocomposites, but also underscore the pivotal role of atomic-scale interfaces in designing superhard nanostructures.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120079"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143230114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-temperature friction and oxidation resistance of self-sacrificial diamond-graphene heterostructures coatings

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2025.120072

Shuyu Fan , Shu Xiao , Hu Zhang , Songsheng Lin , Jing Wu , Fenghua Su , Paul K. Chu

The inherent brittleness and lack of self-support capabilities of diamond and graphene limit their application in durable lubrication systems. However, pre-encapsulating flexible graphene on diamond coatings holds immense potential to balance brittleness with toughness in high-temperature friction applications. Herein, diamond-graphene heterostructure coatings with a semi-coherent interface, characterized by robust bonding interspersed with dislocation defects, were synthesized in situ using hot-filament chemical vapor deposition. Benefiting from the synergistic effects of enhanced interfacial strength and oxygen-trapping capabilities, these coatings demonstrated over 35 % improvement in friction performance across various temperatures. Experimental and computational analyses indicated that the robust interface facilitates energy transfer, allowing graphene to undergo elastic adjustment and stress dissipation in a self-sacrificial manner before the brittle diamond experiences catastrophic failure. Additionally, the engineered defects within graphene layers serve as preferential adsorption sites for oxygen atoms, creating a high-energy barrier against oxygen diffusion into the diamond interior. These results reveal the influencing mechanisms of interfacial strength and defect engineering on diamond-graphene heterostructure coatings, setting the stage for next-generation materials tailored for high-temperature friction applications.

{"title":"High-temperature friction and oxidation resistance of self-sacrificial diamond-graphene heterostructures coatings","authors":"Shuyu Fan , Shu Xiao , Hu Zhang , Songsheng Lin , Jing Wu , Fenghua Su , Paul K. Chu","doi":"10.1016/j.carbon.2025.120072","DOIUrl":"10.1016/j.carbon.2025.120072","url":null,"abstract":"<div><div>The inherent brittleness and lack of self-support capabilities of diamond and graphene limit their application in durable lubrication systems. However, pre-encapsulating flexible graphene on diamond coatings holds immense potential to balance brittleness with toughness in high-temperature friction applications. Herein, diamond-graphene heterostructure coatings with a semi-coherent interface, characterized by robust bonding interspersed with dislocation defects, were synthesized <em>in situ</em> using hot-filament chemical vapor deposition. Benefiting from the synergistic effects of enhanced interfacial strength and oxygen-trapping capabilities, these coatings demonstrated over 35 % improvement in friction performance across various temperatures. Experimental and computational analyses indicated that the robust interface facilitates energy transfer, allowing graphene to undergo elastic adjustment and stress dissipation in a self-sacrificial manner before the brittle diamond experiences catastrophic failure. Additionally, the engineered defects within graphene layers serve as preferential adsorption sites for oxygen atoms, creating a high-energy barrier against oxygen diffusion into the diamond interior. These results reveal the influencing mechanisms of interfacial strength and defect engineering on diamond-graphene heterostructure coatings, setting the stage for next-generation materials tailored for high-temperature friction applications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120072"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143230288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sub-nanopore orifice control on carbonaceous adsorbent boosting N2/CH4 inverse separation with ultra-high selectivity

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119922

Jiawu Huang, Cuiting Yang, Xiaoying Zhou, Xinxin Li, Zhenglin Du, Lin Zhu, Hui Yin, Guang Miao, Jing Xiao

Selective capture of nitrogen (N₂) to upgrade natural gas is of both environmental significance and economic benefit. The realization of carbons with superior N₂-selectivity and adsorption capacity is highly desirable but rarely reported. Herein, polydopamine-derived carbonaceous adsorbent is reported to realize the reverse adsorption separation of N₂/CH₄ with ultra-high selectivity of 11 and N₂ capacity of 47 cm³g^-1 under ambient conditions, as well as impressive separation factor of 7.7 at adsorption-desorption pressure of 20 and 1 bar. The sub-nanopore orifice of carbon as low as 0.36–0.38 nm is finely tuned by controlling the sp²C/sp³C ratio of precursors with optimized ethanol/dopamine ratio. A mathematic linear model is built between gas diffusion rates and the ratio of Ln/Md in the confined sub-nanopores of carbon. Dynamic breakthrough performances at ambient and higher pressures, as well as the exceptional cyclic stability and mild regeneration, further confirm its potential for industrial pressure-swing adsorption processes.

{"title":"Sub-nanopore orifice control on carbonaceous adsorbent boosting N2/CH4 inverse separation with ultra-high selectivity","authors":"Jiawu Huang, Cuiting Yang, Xiaoying Zhou, Xinxin Li, Zhenglin Du, Lin Zhu, Hui Yin, Guang Miao, Jing Xiao","doi":"10.1016/j.carbon.2024.119922","DOIUrl":"10.1016/j.carbon.2024.119922","url":null,"abstract":"<div><div>Selective capture of nitrogen (N<sub>2</sub>) to upgrade natural gas is of both environmental significance and economic benefit. The realization of carbons with superior N<sub>2</sub>-selectivity and adsorption capacity is highly desirable but rarely reported. Herein, polydopamine-derived carbonaceous adsorbent is reported to realize the reverse adsorption separation of N<sub>2</sub>/CH<sub>4</sub> with ultra-high selectivity of 11 and N<sub>2</sub> capacity of 47 cm<sup>3</sup>g<sup>-1</sup> under ambient conditions, as well as impressive separation factor of 7.7 at adsorption-desorption pressure of 20 and 1 bar. The sub-nanopore orifice of carbon as low as 0.36–0.38 nm is finely tuned by controlling the sp<sup>2</sup>C/sp<sup>3</sup>C ratio of precursors with optimized ethanol/dopamine ratio. A mathematic linear model is built between gas diffusion rates and the ratio of Ln/Md in the confined sub-nanopores of carbon. Dynamic breakthrough performances at ambient and higher pressures, as well as the exceptional cyclic stability and mild regeneration, further confirm its potential for industrial pressure-swing adsorption processes.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119922"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fully recyclable carbon nanotube fibers

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119899

Ivan R. Siqueira , Michelle Durán-Chaves , Oliver S. Dewey , Steven M. Williams , Cedric J.S. Ginestra , Juan De La Garza , Yingru Song , Geoff Wehmeyer , Matteo Pasquali

Challenges and limitations in the recycling of metals, polymers, and carbon fibers have been a major concern to climate change and material circularity. With demonstrated property overlaps and increasingly efficient production, carbon nanotube (CNT) fibers can become a sustainable replacement to hard-to-decarbonize incumbent industrial materials. Here, we show that solution-spun CNT fibers can be fully and easily recycled without loss of properties and irrespective of their constituent CNTs. Continuous segments of virgin, single-source CNT fibers made from different CNTs were mixed together in solution and reprocessed into a recycled, mixed-source CNT fiber with the same morphology, structure, alignment, and properties of the virgin, mixed-source CNT fiber made by directly mixing the raw CNTs. Following the ongoing improvements in CNT synthesis and CNT fiber manufacturing, recyclability further positions CNT fibers as a promising alternative to realize the transition to a greener future with a circular economy.

{"title":"Fully recyclable carbon nanotube fibers","authors":"Ivan R. Siqueira , Michelle Durán-Chaves , Oliver S. Dewey , Steven M. Williams , Cedric J.S. Ginestra , Juan De La Garza , Yingru Song , Geoff Wehmeyer , Matteo Pasquali","doi":"10.1016/j.carbon.2024.119899","DOIUrl":"10.1016/j.carbon.2024.119899","url":null,"abstract":"<div><div>Challenges and limitations in the recycling of metals, polymers, and carbon fibers have been a major concern to climate change and material circularity. With demonstrated property overlaps and increasingly efficient production, carbon nanotube (CNT) fibers can become a sustainable replacement to hard-to-decarbonize incumbent industrial materials. Here, we show that solution-spun CNT fibers can be fully and easily recycled without loss of properties and irrespective of their constituent CNTs. Continuous segments of virgin, single-source CNT fibers made from different CNTs were mixed together in solution and reprocessed into a recycled, mixed-source CNT fiber with the same morphology, structure, alignment, and properties of the virgin, mixed-source CNT fiber made by directly mixing the raw CNTs. Following the ongoing improvements in CNT synthesis and CNT fiber manufacturing, recyclability further positions CNT fibers as a promising alternative to realize the transition to a greener future with a circular economy.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119899"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust carbon nanotube composite coatings for perfect absorption in harsh environmental applications

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119900

Yuanhao Jin , Mengjuan Li , Haitao Yang , Lihui Zhang , Chang Liu , Jian Song , Xiaopeng Hao , Jiaping Wang , Shoushan Fan , Qunqing Li

We have successfully developed a nearly perfect absorber coating designed for extreme environmental conditions, utilizing a spray coating process that facilitates easy, cost-effective and large-scale production. The coating is formulated with carbon nanomaterials, enhanced by the incorporation of epoxy resin-coated carbon nanotubes that serve as a binding agent within the carbon black particle matrix. This strategic integration effectively 'freezes' the micro- and nanostructures of the surface, thereby substantially improving the coating's durability and stability. The coating delivers omnidirectional high absorption efficiency, exceeding 99.9 % across a broad wavelength range from 400 nm to 20 μm. It exhibits excellent adhesion and abrasion resistance, ensuring the maintenance of its absorptive performance under extreme conditions such as high and low temperatures, UV radiation, water impact and prolonged outdoor exposure. Carbon nanotubes have demonstrated their effectiveness as ideal connecting materials for perfect absorber coatings and their application has paved the way for new opportunities in the development of smart coatings. This robust and stable perfect absorber coating addresses the theoretical mechanical limitations inherent in conventional perfect absorber, significantly expanding their potential applications.

{"title":"Robust carbon nanotube composite coatings for perfect absorption in harsh environmental applications","authors":"Yuanhao Jin , Mengjuan Li , Haitao Yang , Lihui Zhang , Chang Liu , Jian Song , Xiaopeng Hao , Jiaping Wang , Shoushan Fan , Qunqing Li","doi":"10.1016/j.carbon.2024.119900","DOIUrl":"10.1016/j.carbon.2024.119900","url":null,"abstract":"<div><div>We have successfully developed a nearly perfect absorber coating designed for extreme environmental conditions, utilizing a spray coating process that facilitates easy, cost-effective and large-scale production. The coating is formulated with carbon nanomaterials, enhanced by the incorporation of epoxy resin-coated carbon nanotubes that serve as a binding agent within the carbon black particle matrix. This strategic integration effectively 'freezes' the micro- and nanostructures of the surface, thereby substantially improving the coating's durability and stability. The coating delivers omnidirectional high absorption efficiency, exceeding 99.9 % across a broad wavelength range from 400 nm to 20 μm. It exhibits excellent adhesion and abrasion resistance, ensuring the maintenance of its absorptive performance under extreme conditions such as high and low temperatures, UV radiation, water impact and prolonged outdoor exposure. Carbon nanotubes have demonstrated their effectiveness as ideal connecting materials for perfect absorber coatings and their application has paved the way for new opportunities in the development of smart coatings. This robust and stable perfect absorber coating addresses the theoretical mechanical limitations inherent in conventional perfect absorber, significantly expanding their potential applications.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119900"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous measurement of thermal conductivity and interfacial thermal resistance of Sub-10 nm SWCNT bundle via Raman-probing of distinct energy transport states

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119906

Ibrahim Al Keyyam , Baini Li , Tianyu Wang , Cheng Deng , Xinwei Wang

Recent studies have shown that the thermal conductivity (κ) of single-walled carbon nanotubes (SWCNTs) can dramatically change due to structural changes within the same sample. This introduces substantial uncertainty to interfacial thermal resistance (ITR) measurement, which usually relies on pre-measured κ. Herein, we implement a novel transient Raman technique to distinguish and simultaneously measure the κ and ITR of a SWCNT bundle of less than 10 nm by employing multiple laser heating sizes, each carrying distinct information about the ITR and κ. The ITR is measured as 975–1200 K m W⁻¹ whereas κ is 180–246 W m⁻¹ K⁻¹. The ITR shows a decreasing trend against increased bundle size, demonstrating the impact of contact area in local energy transport. The measured κ is approximately 33 % of supported graphene reported in literatures. This significant κ reduction is attributed to the structural defects in the sample and the bundling effect consistent with earlier studies.

{"title":"Simultaneous measurement of thermal conductivity and interfacial thermal resistance of Sub-10 nm SWCNT bundle via Raman-probing of distinct energy transport states","authors":"Ibrahim Al Keyyam , Baini Li , Tianyu Wang , Cheng Deng , Xinwei Wang","doi":"10.1016/j.carbon.2024.119906","DOIUrl":"10.1016/j.carbon.2024.119906","url":null,"abstract":"<div><div>Recent studies have shown that the thermal conductivity (<em>κ</em>) of single-walled carbon nanotubes (SWCNTs) can dramatically change due to structural changes within the same sample. This introduces substantial uncertainty to interfacial thermal resistance (ITR) measurement, which usually relies on pre-measured <em>κ</em>. Herein, we implement a novel transient Raman technique to distinguish and simultaneously measure the <em>κ</em> and ITR of a SWCNT bundle of less than 10 nm by employing multiple laser heating sizes, each carrying distinct information about the ITR and <em>κ</em>. The ITR is measured as 975–1200 K m W⁻<sup>1</sup> whereas <em>κ</em> is 180–246 W m⁻<sup>1</sup> K⁻<sup>1</sup>. The ITR shows a decreasing trend against increased bundle size, demonstrating the impact of contact area in local energy transport. The measured <em>κ</em> is approximately 33 % of supported graphene reported in literatures. This significant <em>κ</em> reduction is attributed to the structural defects in the sample and the bundling effect consistent with earlier studies.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119906"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional bamboo-derived porous carbon for efficient electrical-thermal energy management and electromagnetic interference shielding

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119872

Chenchen Wang, Xiuyi Lin, Jiangtao Xu, Aizhen Wei, Zhuoqun Wang, Weiwei Zhang, Chuanshuang Hu

Joule heating is an effective heating method but is often limited by the extra heat dissipation. To address this, we developed bamboo-derived porous carbon (CB) for use as Joule heaters, which exhibits remarkable electrothermal conversion efficiency, driven by its high electrical conductivity and porous structure. The natural porous structure of bamboo reduces electrothermal conversion losses, allowing for a steady-state saturation temperature of 164 °C at 2 V. The microcrystalline graphite structure, 3D microporous channels, and low thermal conductivity (0.03 W m⁻¹ k⁻¹) contribute to an electrothermal conversion efficiency of 99.14 %. Moreover, CB heaters demonstrate remarkable surface heating and cooling rates of 114.36 °C/min and 113.78 °C/min, respectively. CB Joule heaters are suitable for de-icing and body-assisted heat treatment at various applied voltages. Its unique gradient porous structure also provides asymmetrical electromagnetic interference (EMI) shielding performance, with high absorption losses concentrated in the sparse inner layer. This sustainable CB material has significant potential for advanced Joule heating and EMI shielding applications.

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引用次数: 0

Large Faraday rotation in pyrolysis synthesized carbon dots

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119895

Zefan Zhang , Igor Savukov , Christian Hilty

Pyrolysis of citric acid produced carbon dots on the 10 nm size scale, tunable by synthesis time. Magneto-optical spectroscopy revealed a size-dependent Faraday rotation. For particles with optimal synthesis time, the Verdet constant was measured as >300 times larger than that of water on a per-mass basis. Introducing ethylenediamine substrate as a nitrogen dopant in the synthesis resulted in a similar effect. These behaviors are indicative of extended sp² networks in the particles. A strong wavelength dependence with largest rotation at the shortest measured wavelength of 405 nm was observed. This dependence is explained by a comparison with the theory of electron-photon interactions, which predicts an increase of the Verdet constant with 1/(ω₀²-ω₂)² for an angular frequency ω and an absorption line at ω₀. The fitting of the analytical function to the measured Faraday rotation indicates a wavelength near 300 nm corresponding to the ω₀, consistent with an extended electron delocalization. Nanomaterials with large magneto-optical effects have new proposed technological applications, such as in their use as magnetic field sensors. The Faraday rotation is related to spin-induced effects, foremost nuclear spin optical rotation, suggesting further applications of these materials supporting an optical readout of spin states in quantum devices.

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引用次数: 0

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