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IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/S0008-6223(24)01172-2

引用次数: 0

Designing micro-3D hierarchical HZCNF@ZS-LDH@MX as advanced electrodes for flexible supercapacitors

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119871

Yan Gao , Ying Huang , Meng Zong , Tianjian Jiang , Shuai Zhang , Zheng Zhang

The design of electrode materials is the core for enhancing the practicality of supercapacitors. Herein, we report an electrode material with a micro-3D structure, in which the template-shaped ZnS nanorods are fixed on the hollow carbon nanofibers. Subsequently, ZnCo-LDH nanosheets grow on the surface of ZnS nanorods directionally and form a 3D structure. Finally, an MXene layer is coated on the material surface by electrostatic spraying. Experimental analysis shows that due to the construction of a stable polymetallic compound array and a conductive network, the HZCNF@ZS-LDH@MX electrode can maintain rapid charge transfer, thereby significantly improving the kinetics of ion/electron reactions. Taking these advantage, HZCNF@ZS-LDH@MX has a high specific capacitance of 830 F g⁻¹, a specific surface area of 740 m² g⁻¹, and good cycling stability over 20,000 cycles. In addition, the assembled flexible device reaches an energy density of 65.1 Wh kg⁻¹, which is sufficient to power an LED board. This study proposes an effective strategy for enhancing the ion and charge transport within the hierarchical structure. By making full use of the advantages of two-dimensional materials and designing micro-3D structures, it has opened up new approaches for the development and utilization of supercapacitor electrodes. In addition, according to the special nature of the material, the ability of electromagnetic wave absorbing is further tested. The results showed that the maximum reflection loss is −60 dB, and there is a potential application possibility of dual functions of energy storage and wave absorption.

{"title":"Designing micro-3D hierarchical HZCNF@ZS-LDH@MX as advanced electrodes for flexible supercapacitors","authors":"Yan Gao , Ying Huang , Meng Zong , Tianjian Jiang , Shuai Zhang , Zheng Zhang","doi":"10.1016/j.carbon.2024.119871","DOIUrl":"10.1016/j.carbon.2024.119871","url":null,"abstract":"<div><div>The design of electrode materials is the core for enhancing the practicality of supercapacitors. Herein, we report an electrode material with a micro-3D structure, in which the template-shaped ZnS nanorods are fixed on the hollow carbon nanofibers. Subsequently, ZnCo-LDH nanosheets grow on the surface of ZnS nanorods directionally and form a 3D structure. Finally, an MXene layer is coated on the material surface by electrostatic spraying. Experimental analysis shows that due to the construction of a stable polymetallic compound array and a conductive network, the HZCNF@ZS-LDH@MX electrode can maintain rapid charge transfer, thereby significantly improving the kinetics of ion/electron reactions. Taking these advantage, HZCNF@ZS-LDH@MX has a high specific capacitance of 830 F g<sup>−1</sup>, a specific surface area of 740 m<sup>2</sup> g<sup>−1</sup>, and good cycling stability over 20,000 cycles. In addition, the assembled flexible device reaches an energy density of 65.1 Wh kg<sup>−1</sup>, which is sufficient to power an LED board. This study proposes an effective strategy for enhancing the ion and charge transport within the hierarchical structure. By making full use of the advantages of two-dimensional materials and designing micro-3D structures, it has opened up new approaches for the development and utilization of supercapacitor electrodes. In addition, according to the special nature of the material, the ability of electromagnetic wave absorbing is further tested. The results showed that the maximum reflection loss is −60 dB, and there is a potential application possibility of dual functions of energy storage and wave absorption.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119871"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150147","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

Single-walled carbon nanotubes filled with sulfur and phosphorus compounds for real-time detection of NO2 in air

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119915

Vitalii I. Sysoev, Olga V. Sedelnikova, Anna A. Vorfolomeeva, Tatyana A. Geraseva, Lyubov G. Bulusheva, Alexander V. Okotrub

Filling cavities in single-walled carbon nanotubes (SWCNTs) opens up additional opportunities for modifying their surface physicochemical properties. Here, we use a vaporization-condensation method to encapsulate individual phosphorus and sulfur and their mixtures and study the effect of filler composition on the gas sensor properties of SWCNTs with respect to nitrogen dioxide exposure. The introduction of a filler leads to significant improvement in the sensor's response to low concentrations of nitrogen dioxide in the air by enhancing charge transfer, reducing the number of adsorption sites inside the bundles/nanotubes, and lowering the adsorption energy. Sensors based on filled SWCNTs exhibit a calculated detection limit of 2–7 ppb NO₂ at a response time of less than 1 min, long-term stability of more than one year, and exceptional selectivity to NO₂.

引用次数: 0

Multifunctional porous carbon fibers-based porous stacking for 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.2024.119907

Heng Pan , Shuyi Qing , Pei Lyu , Jie Ren , Qi Ran , Jun Hou , Zilong Wang , Liangjun Xia , Xiaofang Zhang , Xin Liu , Weilin Xu

Developing electromagnetic interference (EMI) shielding materials with combinations of lightweight, multi-functions, and robust performance under harsh conditions, is urgent towards their practical application for portable electronic devices, while it still faces extreme challenges. In this work, porous carbon fibers (PCFs) featuring the interconnected nano-scaled pores on the surface and the internal micron-sized pores, were prepared and stacked into multi-layer carbon films, that further introduce the in-of-plane porous network and out-of-plane interlayer space. Such multi-scaled porous structure brings beneficial effects to carbon films including low density, consecutively conductive pathway, and outstanding capability to absorb electromagnetic waves. The produced carbon films exhibit remarkable electromagnetic interference shielding efficiency, achieving an attenuation level of up to 90 dB in the X band, even with a low material density of only 0.19 g/cm³. Furthermore, the stacked carbon films are structurally stable and robust, capable of delivering high EMI shielding performance under extreme environments, like acid/basic treatments, high (250 °C) or extremely cryogenic (−196 °C) temperatures and hygrothermal environments. Additionally, as-fabricated multi-layer carbon films demonstrate outstanding adsorption capacity for organic solvents and charge storage capacity. This work paves the way for multifunctional EMI materials construction in an economical and efficient manner.

{"title":"Multifunctional porous carbon fibers-based porous stacking for electromagnetic interference shielding","authors":"Heng Pan , Shuyi Qing , Pei Lyu , Jie Ren , Qi Ran , Jun Hou , Zilong Wang , Liangjun Xia , Xiaofang Zhang , Xin Liu , Weilin Xu","doi":"10.1016/j.carbon.2024.119907","DOIUrl":"10.1016/j.carbon.2024.119907","url":null,"abstract":"<div><div>Developing electromagnetic interference (EMI) shielding materials with combinations of lightweight, multi-functions, and robust performance under harsh conditions, is urgent towards their practical application for portable electronic devices, while it still faces extreme challenges. In this work, porous carbon fibers (PCFs) featuring the interconnected nano-scaled pores on the surface and the internal micron-sized pores, were prepared and stacked into multi-layer carbon films, that further introduce the in-of-plane porous network and out-of-plane interlayer space. Such multi-scaled porous structure brings beneficial effects to carbon films including low density, consecutively conductive pathway, and outstanding capability to absorb electromagnetic waves. The produced carbon films exhibit remarkable electromagnetic interference shielding efficiency, achieving an attenuation level of up to 90 dB in the X band, even with a low material density of only 0.19 g/cm³. Furthermore, the stacked carbon films are structurally stable and robust, capable of delivering high EMI shielding performance under extreme environments, like acid/basic treatments, high (250 °C) or extremely cryogenic (−196 °C) temperatures and hygrothermal environments. Additionally, as-fabricated multi-layer carbon films demonstrate outstanding adsorption capacity for organic solvents and charge storage capacity. This work paves the way for multifunctional EMI materials construction in an economical and efficient manner.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119907"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150629","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

Surface structure engineering and electromagnetic character regulation synergestically boosts electromagnetic shielding performances of carbon nanotube sponge

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119879

Jiapeng Zhang , Sheng Zhang , Yaoqieyu Song , Yuyan Weng , Yanhan Liang , Zhe Wu , Zhi Hong Hang , Tianhui Zhang , Xiaohua Zhang , Yitan Li , Zhaohui Yang

The negative effects of electromagnetic (EM) pollution on precise electronic devices as well as public health have received serious attention. Although various electromagnetic interference (EMI) shielding materials have emerged, it is still a great challenge to effectively balance the high EMI shielding performance and low secondary emission of EM waves induced by direct reflection. In this study, we designed two type of shielding materials based on 3D carbon nanotube sponge (CNTS) with manufactured surface structure. By combining the 2D MXene layer or magnetic nickel coating with patterned CNTS, we achieve high EMI shielding performance and low reflectivity, as well as adjustable shielding mechanism through the dual adjustment of the structure and electromagnetic properties. The EMI shielding effectiveness of CNTS/MXene up to 90 dB and reflectivity as low as 0.31 (at 18 GHz), a reduction of about 64 % compared to the original CNTS. And the EMI shielding effectiveness of Ni/CNTS up to 67 dB and reflectivity as low as 0.44 (at 12 GHz). Microwave microscope (NFSMM), COMSOL simulation and vector network analyzer consistently confirmed the synergestical surpression effect on the reflectivity from surface structure engineering and electromagnetic regulation. These results not only guide the designing of advanced EMI shielding materials with low reflectivity, but also shed light on the hidden mechanism between interface structures and performances of the composite materials.

{"title":"Surface structure engineering and electromagnetic character regulation synergestically boosts electromagnetic shielding performances of carbon nanotube sponge","authors":"Jiapeng Zhang , Sheng Zhang , Yaoqieyu Song , Yuyan Weng , Yanhan Liang , Zhe Wu , Zhi Hong Hang , Tianhui Zhang , Xiaohua Zhang , Yitan Li , Zhaohui Yang","doi":"10.1016/j.carbon.2024.119879","DOIUrl":"10.1016/j.carbon.2024.119879","url":null,"abstract":"<div><div>The negative effects of electromagnetic (EM) pollution on precise electronic devices as well as public health have received serious attention. Although various electromagnetic interference (EMI) shielding materials have emerged, it is still a great challenge to effectively balance the high EMI shielding performance and low secondary emission of EM waves induced by direct reflection. In this study, we designed two type of shielding materials based on 3D carbon nanotube sponge (CNTS) with manufactured surface structure. By combining the 2D MXene layer or magnetic nickel coating with patterned CNTS, we achieve high EMI shielding performance and low reflectivity, as well as adjustable shielding mechanism through the dual adjustment of the structure and electromagnetic properties. The EMI shielding effectiveness of CNTS/MXene up to 90 dB and reflectivity as low as 0.31 (at 18 GHz), a reduction of about 64 % compared to the original CNTS. And the EMI shielding effectiveness of Ni/CNTS up to 67 dB and reflectivity as low as 0.44 (at 12 GHz). Microwave microscope (NFSMM), COMSOL simulation and vector network analyzer consistently confirmed the synergestical surpression effect on the reflectivity from surface structure engineering and electromagnetic regulation. These results not only guide the designing of advanced EMI shielding materials with low reflectivity, but also shed light on the hidden mechanism between interface structures and performances of the composite materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119879"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150846","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

Lightweight asymmetric C/SiC nanofiber film with conductive-dielectric gradient for adjustable 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.2025.120068

Junjie Wang, Cheng Wang, Haitao Yang, Hui Zhang, Dunyan Jiang, Shikuo Li

Design novel interfacial structure material to achieve highly efficient electromagnetic interference (EMI) shielding is one of the biggest challenges. Herein, the asymmetric C/SiC nanofiber film with conductive-dielectric gradient was precisely in situ prepared through the carbon thermal reduction reaction during the Flash Joule Heating (FJH) process. For the Fick diffusion of SiO₂ vapor, the SiC nanoparticles were gradually anchored on the carbon fibers with a gradient distribution from bottom to top. The electrical conductivity of the asymmetric C/SiC nanofiber film was thus continuously increasing from about 7.97 S cm⁻¹ (bottom) to 0.59 S cm⁻¹ (top). As a result, the asymmetric C/SiC nanofiber film achieved a maximum EMI shielding effectiveness (62.0 dB) in the X-band with a thickness of 1.5 mm, and superior stability in various extreme conditions. Moreover, the EMI shielding effectiveness of the asymmetric C/SiC nanofiber film can be adjusted by altering the incident direction or the film thickness. The effects of gradient structure on the potential distribution and electromagnetic wave loss for the asymmetric film were investigated by the Kelvin probe force microscope and finite element simulation analysis. This work provides a novel insight into designing reasonable interfacial structure to modulate EMI shielding performance.

{"title":"Lightweight asymmetric C/SiC nanofiber film with conductive-dielectric gradient for adjustable electromagnetic interference shielding","authors":"Junjie Wang, Cheng Wang, Haitao Yang, Hui Zhang, Dunyan Jiang, Shikuo Li","doi":"10.1016/j.carbon.2025.120068","DOIUrl":"10.1016/j.carbon.2025.120068","url":null,"abstract":"<div><div>Design novel interfacial structure material to achieve highly efficient electromagnetic interference (EMI) shielding is one of the biggest challenges. Herein, the asymmetric C/SiC nanofiber film with conductive-dielectric gradient was precisely in situ prepared through the carbon thermal reduction reaction during the Flash Joule Heating (FJH) process. For the Fick diffusion of SiO<sub>2</sub> vapor, the SiC nanoparticles were gradually anchored on the carbon fibers with a gradient distribution from bottom to top. The electrical conductivity of the asymmetric C/SiC nanofiber film was thus continuously increasing from about 7.97 S cm<sup>−1</sup> (bottom) to 0.59 S cm<sup>−1</sup> (top). As a result, the asymmetric C/SiC nanofiber film achieved a maximum EMI shielding effectiveness (62.0 dB) in the X-band with a thickness of 1.5 mm, and superior stability in various extreme conditions. Moreover, the EMI shielding effectiveness of the asymmetric C/SiC nanofiber film can be adjusted by altering the incident direction or the film thickness. The effects of gradient structure on the potential distribution and electromagnetic wave loss for the asymmetric film were investigated by the Kelvin probe force microscope and finite element simulation analysis. This work provides a novel insight into designing reasonable interfacial structure to modulate EMI shielding performance.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"235 ","pages":"Article 120068"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143230291","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

Thermally conductive graphene-based films for high heat flux dissipation

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119908

Haolong Zheng , Peng He , Siwei Yang , Guqiao Ding

Heat accumulation during the operation of semiconductor devices is fatal to the stability and longevity of high-performance electronic systems. Heat spreaders are critical for transferring excess heat away from heat-producing regions to surroundings. Recently, the assembly of two-dimensional graphene sheets into macroscopic graphene-based films exhibiting superior in-plane thermal conductivity (k) has garnered considerable interest in academia. These films have been applied as heat spreaders in the thermal management of portable electronic devices. While increasing k values is paramount for enhancing the heat transmissibility of graphene-based films, the significance of film thickness (d) in this regard has been largely overlooked. This paper reviews the research progress in preparing high-heat-transmissibility graphene-based films, shedding light on the critical yet previously neglected influence of d and its intricate relationship with k. Advancements in increasing k values are discussed, focusing on strategies and related mechanisms for controlling structural defects in graphene-based films. Building upon these insights, difficulties associated with the controlled assembly of thick graphene-based films are elucidated and existing efforts to mitigate the pronounced decrease in k with increasing d are presented. Finally, major challenges and potential solutions to current bottlenecks are proposed to guide the future development of high-heat-transmissibility graphene-based films.

{"title":"Thermally conductive graphene-based films for high heat flux dissipation","authors":"Haolong Zheng , Peng He , Siwei Yang , Guqiao Ding","doi":"10.1016/j.carbon.2024.119908","DOIUrl":"10.1016/j.carbon.2024.119908","url":null,"abstract":"<div><div>Heat accumulation during the operation of semiconductor devices is fatal to the stability and longevity of high-performance electronic systems. Heat spreaders are critical for transferring excess heat away from heat-producing regions to surroundings. Recently, the assembly of two-dimensional graphene sheets into macroscopic graphene-based films exhibiting superior in-plane thermal conductivity (<em>k</em>) has garnered considerable interest in academia. These films have been applied as heat spreaders in the thermal management of portable electronic devices. While increasing <em>k</em> values is paramount for enhancing the heat transmissibility of graphene-based films, the significance of film thickness (<em>d</em>) in this regard has been largely overlooked. This paper reviews the research progress in preparing high-heat-transmissibility graphene-based films, shedding light on the critical yet previously neglected influence of <em>d</em> and its intricate relationship with <em>k</em>. Advancements in increasing <em>k</em> values are discussed, focusing on strategies and related mechanisms for controlling structural defects in graphene-based films. Building upon these insights, difficulties associated with the controlled assembly of thick graphene-based films are elucidated and existing efforts to mitigate the pronounced decrease in <em>k</em> with increasing <em>d</em> are presented. Finally, major challenges and potential solutions to current bottlenecks are proposed to guide the future development of high-heat-transmissibility graphene-based films.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119908"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149735","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

Thermophysical properties of water-based nanofluids modified with few-layer graphene

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119911

Aleksei A. Vozniakovskii , Ekaterina I. Kalashnikova , Sergey V. Kidalov , Alexander P. Voznyakovskii

The paper describes a method for the production of water-based nanofluids with few-layer graphene (FLG) synthesized by self-propagating high-temperature synthesis (SHS). The advantage of this method is the possibility of synthesizing large volumes of material without Stone-Wales defects at low cost. This study presents results on the viscosity, electrical conductivity, specific heat capacity, and thermal conductivity of water-based nanofluids modified with FLG. By using 0.8 mass % FLG obtained by SHS, it became possible to obtain stable nanofluids without the use of surfactants. The FLG concentration of 0.8 mass % increased thermal conductivity by up to 2.3 times and electrical conductivity by up to 90 times compared to pure water at 60 °C. At the same time, there were no significant changes in the viscosity or heat capacity of the nanofluids at different FLG concentrations and temperatures.

引用次数: 0

OBSERVATION OF THE SURFACE MORPHOLOGY OF CARBON ALLOY CATALYSTS IN AQUEOUS SOLUTION BY ATOMIC FORCE MICROSCOPY

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119865

Takafumi Ishii, Masaya Miyamoto, Jun-ichi Ozaki

引用次数: 0

Gastric fold-inspired microwrinkled carbon nanotube sheets for harvesting mechanical energy of organ motion

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon

Pub Date : 2025-02-01 DOI: 10.1016/j.carbon.2024.119869

Seongjae Oh , Chae-Lin Park , Hyeon Ji Kim , Eun Sung Kim , Junheon Lee , Hyun Kim , Byeonghwa Goh , Joonmyung Choi , Shi Hyeong Kim

Biomechanical energy from daily activities and organ motion is an attractive energy source because of its sustainability. Mechanical energy harvesters, including triboelectric, piezoelectric, and chemo-mechanical harvesters, are gaining significant attention for converting energy into electrical power for self-powered devices. Chemo-mechanical energy harvesters that utilize the piezoionic effect are particularly suited for harnessing the movements of organs, such as the heart, stomach, and lungs, in the electrolyte-rich environment of the human body. However, existing harvesters are inefficient because of their unidirectional response and high modulus, which hinder organ motion. In this paper, we propose a microwrinkled carbon nanotube (CNT) sheets harvester (MCSH), inspired by the gastric wrinkle morphology and featuring a low modulus (43.9 kPa), capable of multidirectional energy harvesting. The MCSH generates energy through the relaxoionic effect during unfolding and folding cycles, achieving an open-circuit voltage change of 11.6 mV and a peak current of 112.5 A kg⁻¹ in 0.1 M HCl. Finally, the MCSH demonstrated stable energy generation in a human stomach model using simulated body fluids.

{"title":"Gastric fold-inspired microwrinkled carbon nanotube sheets for harvesting mechanical energy of organ motion","authors":"Seongjae Oh , Chae-Lin Park , Hyeon Ji Kim , Eun Sung Kim , Junheon Lee , Hyun Kim , Byeonghwa Goh , Joonmyung Choi , Shi Hyeong Kim","doi":"10.1016/j.carbon.2024.119869","DOIUrl":"10.1016/j.carbon.2024.119869","url":null,"abstract":"<div><div>Biomechanical energy from daily activities and organ motion is an attractive energy source because of its sustainability. Mechanical energy harvesters, including triboelectric, piezoelectric, and chemo-mechanical harvesters, are gaining significant attention for converting energy into electrical power for self-powered devices. Chemo-mechanical energy harvesters that utilize the piezoionic effect are particularly suited for harnessing the movements of organs, such as the heart, stomach, and lungs, in the electrolyte-rich environment of the human body. However, existing harvesters are inefficient because of their unidirectional response and high modulus, which hinder organ motion. In this paper, we propose a microwrinkled carbon nanotube (CNT) sheets harvester (MCSH), inspired by the gastric wrinkle morphology and featuring a low modulus (43.9 kPa), capable of multidirectional energy harvesting. The MCSH generates energy through the relaxoionic effect during unfolding and folding cycles, achieving an open-circuit voltage change of 11.6 mV and a peak current of 112.5 A kg<sup>−1</sup> in 0.1 M HCl. Finally, the MCSH demonstrated stable energy generation in a human stomach model using simulated body fluids.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"233 ","pages":"Article 119869"},"PeriodicalIF":10.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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