Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018330
Liekai Liu, Pingjian Niu, Biaohui Huang, Linge Chai, Jingming Zheng, Xinglei Deng, Li Song, Wei-qing Chen, Z. Yue, Lang Zhou, Hao Tang
Silicon (Si) is expected to replace graphite as the next generation anode material for lithium-ion batteries (LIBs). However, Si has a low electron conductivity and large volume changing during the lithiation/delithiation process, which limits the commercialisation of the Si anode. In this paper, micron whisker carbon nanotubes (MWCNTs) and graphene oxides (GO) were used to construct a three-dimensional conductive network to improve the electrochemical performance of the Si anode. The study found that GO and MWCNTs can greatly improve the performance of Si-based anode. Among them, 5% GO/Si composite exhibited the highest charge capacity retention of 92.3%, maintains a capacity of 520.9 mAh/g (contribution of micron Si is about 3388 mAh/g) after 10 cycles.
{"title":"Silicon-based anode materials with three-dimensional conductive network for high-performance lithium ion batteries","authors":"Liekai Liu, Pingjian Niu, Biaohui Huang, Linge Chai, Jingming Zheng, Xinglei Deng, Li Song, Wei-qing Chen, Z. Yue, Lang Zhou, Hao Tang","doi":"10.1504/IJNM.2019.10018330","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018330","url":null,"abstract":"Silicon (Si) is expected to replace graphite as the next generation anode material for lithium-ion batteries (LIBs). However, Si has a low electron conductivity and large volume changing during the lithiation/delithiation process, which limits the commercialisation of the Si anode. In this paper, micron whisker carbon nanotubes (MWCNTs) and graphene oxides (GO) were used to construct a three-dimensional conductive network to improve the electrochemical performance of the Si anode. The study found that GO and MWCNTs can greatly improve the performance of Si-based anode. Among them, 5% GO/Si composite exhibited the highest charge capacity retention of 92.3%, maintains a capacity of 520.9 mAh/g (contribution of micron Si is about 3388 mAh/g) after 10 cycles.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43035213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018327
Yue Li, Weilin Zhao, Y. Gong
The experimental results regarding the surface tension and contact angle of Al2O3-oil and SiO2-oil nanofluids with 0.1%~1.0% volume fraction at the temperature of 25°C~65°C are presented. The measurements illustrate that the surface tension is improved and the contact angle is reduced compared with oil based liquid. At the temperature of 25°C, for 0.5% volume fraction with 60 nm nanoparticles size, the enhancement of the surface tension is about 4.11% for Al2O3-oil nanofluids and 6.79% for SiO2-oil nanofluids. Corresponding, the weakening of the contact angle is 37.93% and 27.59%. In addition, the experimental profiles of the surface tension of Al2O3-oil and SiO2-oil nanofluids indicate that they fall with temperature, and inversely rise with the increasing of volume fraction and nanoparticles size. And the contact angle of the two kinds of nanofluids increase with nanoparticles size, whereas decrease with the increase in volume fraction. All demonstrate that the wetting properties are modified when Al2O3 and SiO2 nanoparticles are added into oil based liquid. Furthermore, the experimental phenomena are thoroughly analysed.
{"title":"Experimental investigation on the surface tension and contact angle of Al2O3-oil and SiO2-oil nanofluids","authors":"Yue Li, Weilin Zhao, Y. Gong","doi":"10.1504/IJNM.2019.10018327","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018327","url":null,"abstract":"The experimental results regarding the surface tension and contact angle of Al2O3-oil and SiO2-oil nanofluids with 0.1%~1.0% volume fraction at the temperature of 25°C~65°C are presented. The measurements illustrate that the surface tension is improved and the contact angle is reduced compared with oil based liquid. At the temperature of 25°C, for 0.5% volume fraction with 60 nm nanoparticles size, the enhancement of the surface tension is about 4.11% for Al2O3-oil nanofluids and 6.79% for SiO2-oil nanofluids. Corresponding, the weakening of the contact angle is 37.93% and 27.59%. In addition, the experimental profiles of the surface tension of Al2O3-oil and SiO2-oil nanofluids indicate that they fall with temperature, and inversely rise with the increasing of volume fraction and nanoparticles size. And the contact angle of the two kinds of nanofluids increase with nanoparticles size, whereas decrease with the increase in volume fraction. All demonstrate that the wetting properties are modified when Al2O3 and SiO2 nanoparticles are added into oil based liquid. Furthermore, the experimental phenomena are thoroughly analysed.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49256979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/ijnm.2019.10018328
H. Fan, J. Zhang, W. Ju, Baoshun Liu, X. Zhao, X. C. Liu, X. Yi
The hierarchical of NiCo2O4@MnO2 core-shell nanotubes arrays anchored on 3D hierarchical porous carbon aerogels scaffold (NiCo2O4@MnO2-CAS) are prepared through a facile hydrothermal method combined with a simple thermal treatment. Such unique array nanoarchitectures and the synergistic effects of component nanomaterials exhibit remarkable electrochemical performance. The results show high specific capacitance of 786.0 F/g at current densities of 0.5 A/g, excellent rate performance and good cycling stability with capacitance retention of 84.9% after 2,000 cycles. An asymmetric supercapacitor with operating potential at 1.4 V is configured with NiCo2O4@MnO2 composites against active carbon, and exhibits a specific capacitance of 145.0 F/g at current density of 1.0 A/g and a high energy density of 39.0 Wh/kg at a power density of 350.0 W/kg.
{"title":"Growth of NiCo2O4 nanotubes @MnO2 sheet core-shell arrays on 3D hierarchical porous carbon aerogels as superior electrodes for supercapacitors","authors":"H. Fan, J. Zhang, W. Ju, Baoshun Liu, X. Zhao, X. C. Liu, X. Yi","doi":"10.1504/ijnm.2019.10018328","DOIUrl":"https://doi.org/10.1504/ijnm.2019.10018328","url":null,"abstract":"The hierarchical of NiCo2O4@MnO2 core-shell nanotubes arrays anchored on 3D hierarchical porous carbon aerogels scaffold (NiCo2O4@MnO2-CAS) are prepared through a facile hydrothermal method combined with a simple thermal treatment. Such unique array nanoarchitectures and the synergistic effects of component nanomaterials exhibit remarkable electrochemical performance. The results show high specific capacitance of 786.0 F/g at current densities of 0.5 A/g, excellent rate performance and good cycling stability with capacitance retention of 84.9% after 2,000 cycles. An asymmetric supercapacitor with operating potential at 1.4 V is configured with NiCo2O4@MnO2 composites against active carbon, and exhibits a specific capacitance of 145.0 F/g at current density of 1.0 A/g and a high energy density of 39.0 Wh/kg at a power density of 350.0 W/kg.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45349406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018326
Hui Li, Yuqin Liu, Ji Chen, Da Chen, Junkai Tang, Yanxi Deng
Magnesium aluminate spinel nanoparticles were synthesised via chemical precipitation method using ammonia as precipitating agent. The effects of calcination temperature on the phase constitution, morphologies, specific surface area and photocatalytic properties were investigated. Single phase cubic MgAl2O4 formed by calcining the precursors at the temperature ranges from 700°C to 1,000°C for 90 min. The mean crystallite size of the MgAl2O4 powder increases slightly with the increase in calcination temperature. Increasing the calcination temperature leads to decrease in the specific surface area and the decline of the photocatalytic properties. The methylene blue removal ratio reaches 96.3% within 240 min using MgAl2O4 spinel powder calcined at 700°C.
{"title":"Photocatalytic properties of magnesium aluminate spinel nanoparticles prepared by chemical precipitation method","authors":"Hui Li, Yuqin Liu, Ji Chen, Da Chen, Junkai Tang, Yanxi Deng","doi":"10.1504/IJNM.2019.10018326","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018326","url":null,"abstract":"Magnesium aluminate spinel nanoparticles were synthesised via chemical precipitation method using ammonia as precipitating agent. The effects of calcination temperature on the phase constitution, morphologies, specific surface area and photocatalytic properties were investigated. Single phase cubic MgAl2O4 formed by calcining the precursors at the temperature ranges from 700°C to 1,000°C for 90 min. The mean crystallite size of the MgAl2O4 powder increases slightly with the increase in calcination temperature. Increasing the calcination temperature leads to decrease in the specific surface area and the decline of the photocatalytic properties. The methylene blue removal ratio reaches 96.3% within 240 min using MgAl2O4 spinel powder calcined at 700°C.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42840598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018339
Junhua Hu, D. Wan, Peng Zhang, Jiangtao Zhao, G. Shao
TiO2/WO3 composite nanofibres were fabricated by electrospinning and calcine. The as-prepared composite nanofibes were characterised by scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectroscopy, respectively. The results indicated that the TiO2/WO3 composite nanofibres were successfully fabricated, and the H2-generation of the as-fabricated TiO2/WO3 composite nanofibres was significantly enhanced comparing with pure TiO2 nanofibres. The enhanced photocatalytic activities were mainly due to the addition of WO3, which acted as a 'hole collector' leading to effective charge transfer. More importantly, the improvement of photocatalytic activity of TiO2/WO3 composite nanofibres was proved by photocurrent and electrochemical impedance spectroscopy.
{"title":"One-dimensional Z-scheme TiO2/WO3 composite nanofibres for enhanced photocatalytic activity of hydrogen production","authors":"Junhua Hu, D. Wan, Peng Zhang, Jiangtao Zhao, G. Shao","doi":"10.1504/IJNM.2019.10018339","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018339","url":null,"abstract":"TiO2/WO3 composite nanofibres were fabricated by electrospinning and calcine. The as-prepared composite nanofibes were characterised by scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectroscopy, respectively. The results indicated that the TiO2/WO3 composite nanofibres were successfully fabricated, and the H2-generation of the as-fabricated TiO2/WO3 composite nanofibres was significantly enhanced comparing with pure TiO2 nanofibres. The enhanced photocatalytic activities were mainly due to the addition of WO3, which acted as a 'hole collector' leading to effective charge transfer. More importantly, the improvement of photocatalytic activity of TiO2/WO3 composite nanofibres was proved by photocurrent and electrochemical impedance spectroscopy.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46802171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018325
Minhong Xu, H. Chen, G. Pan, Yuhua Guo, Tao Wu
The supported catalyst membranes (CoPc/PHBV) were prepared by solution casting method with tetracarboxyphthalocynine cobalt (CoPc) and poly(3-hydroxybutyrateco-3-hydroxyvalerate) (PHBV). The membranes were characterised by scanning electron microscope, X-ray diffractometer and fourier transform infrared spectroscopy. The results indicate that CoPc and PHBV may be combined by physical, and the crystal structure of PHBV which loaded CoPc is not changed. In addition, the catalytic performances of CoPc/PHBV were evaluated by degradation of methylene blue (MB). The results reveal that CoPc/PHBV and H2O2 have significant synergistic effect on catalytic degradation of MB, and degradation efficiency is 73% after 7 h. Hydroxyl radicals play a key role in catalytic degradation of MB based on the study of reaction mechanism. The dynamics about catalytic oxidation of MB were also explored. The results show that catalytic degradation process fits well with first-order kinetic equation.
{"title":"Preparation of poly(3-hydroxybutyrateco-3-hydroxyvalerate) supported cobalt phthalocyanine thin membranes and its catalytic degradation of methylene blue","authors":"Minhong Xu, H. Chen, G. Pan, Yuhua Guo, Tao Wu","doi":"10.1504/IJNM.2019.10018325","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018325","url":null,"abstract":"The supported catalyst membranes (CoPc/PHBV) were prepared by solution casting method with tetracarboxyphthalocynine cobalt (CoPc) and poly(3-hydroxybutyrateco-3-hydroxyvalerate) (PHBV). The membranes were characterised by scanning electron microscope, X-ray diffractometer and fourier transform infrared spectroscopy. The results indicate that CoPc and PHBV may be combined by physical, and the crystal structure of PHBV which loaded CoPc is not changed. In addition, the catalytic performances of CoPc/PHBV were evaluated by degradation of methylene blue (MB). The results reveal that CoPc/PHBV and H2O2 have significant synergistic effect on catalytic degradation of MB, and degradation efficiency is 73% after 7 h. Hydroxyl radicals play a key role in catalytic degradation of MB based on the study of reaction mechanism. The dynamics about catalytic oxidation of MB were also explored. The results show that catalytic degradation process fits well with first-order kinetic equation.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46587439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10016330
Qiao-Neng Guo, J. Wang, Shi-E. Yang, Mingxing Wang, Xuefeng Han, Qiang Liu, D. Zhu, Liangbing Hu
The mechanical process of aluminium thin films under uniaxial tensile strain was simulated with molecular dynamics method in a low temperature range from 40 to 250 K. The stress-strain curve and potential energy-strain curve of aluminium thin film under uniaxial tensile deformation were obtained. The variation characteristics of stress-strain curves with temperature are alike at the elastic stage. However, at the plastic stage the stress-strain curves are grouped into three categories (40 K ≤ T < 100 K, 100 K ≤ T < 200 K, 200 K ≤ T ≤ 250 K). From the stress-strain curves, we found the strange temperature dependence of the local maximum stress, maximal potential energy and their corresponding strain: when the temperature is below 100 K, they go down quickly with temperature, and when above 100 K and below 200 K, they descend slowly and do very slowly above 200 K. Therefore, we have identified two critical temperatures for the transition of plastic flow mechanism.
{"title":"Low temperature dependence of mechanical process of ultrathin aluminium films: molecular dynamics simulations","authors":"Qiao-Neng Guo, J. Wang, Shi-E. Yang, Mingxing Wang, Xuefeng Han, Qiang Liu, D. Zhu, Liangbing Hu","doi":"10.1504/IJNM.2019.10016330","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10016330","url":null,"abstract":"The mechanical process of aluminium thin films under uniaxial tensile strain was simulated with molecular dynamics method in a low temperature range from 40 to 250 K. The stress-strain curve and potential energy-strain curve of aluminium thin film under uniaxial tensile deformation were obtained. The variation characteristics of stress-strain curves with temperature are alike at the elastic stage. However, at the plastic stage the stress-strain curves are grouped into three categories (40 K ≤ T < 100 K, 100 K ≤ T < 200 K, 200 K ≤ T ≤ 250 K). From the stress-strain curves, we found the strange temperature dependence of the local maximum stress, maximal potential energy and their corresponding strain: when the temperature is below 100 K, they go down quickly with temperature, and when above 100 K and below 200 K, they descend slowly and do very slowly above 200 K. Therefore, we have identified two critical temperatures for the transition of plastic flow mechanism.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47750323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018323
Xiaoxi Zhao, Yizhe Zhang, Yongchi Li, W. Liu
The failure process of multi-layer graphene sheets with AB stacking order under shear deformation is simulated using molecular dynamics method with Tersoff potential. Shear stress-strain relationships and shear failure modes of zigzag and armchair graphene sheets are obtained, while the effect of the number of graphene layers on the shear properties of zigzag and armchair graphene sheets is investigated. The results indicate that the shear modulus of graphene sheets is inclined to diverge with the increase of the number of graphene layers. Moreover, the ultimate stress and shear failure strain of zigzag and armchair graphene sheets are reduced gradually with the increase of the number of graphene layers.
{"title":"Molecular dynamics simulation of shear deformation of multi-layer graphene sheets with Tersoff potential","authors":"Xiaoxi Zhao, Yizhe Zhang, Yongchi Li, W. Liu","doi":"10.1504/IJNM.2019.10018323","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018323","url":null,"abstract":"The failure process of multi-layer graphene sheets with AB stacking order under shear deformation is simulated using molecular dynamics method with Tersoff potential. Shear stress-strain relationships and shear failure modes of zigzag and armchair graphene sheets are obtained, while the effect of the number of graphene layers on the shear properties of zigzag and armchair graphene sheets is investigated. The results indicate that the shear modulus of graphene sheets is inclined to diverge with the increase of the number of graphene layers. Moreover, the ultimate stress and shear failure strain of zigzag and armchair graphene sheets are reduced gradually with the increase of the number of graphene layers.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42961837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10014844
Jing Gao, Tong Mingxing, W. Lei, Xuanhui Zhang, Guohua Li
Lithium silicate is an important sorbent to capture CO2. Herein, hollow microellipsoids of lithium silicate with mesoporosity were prepared by a hydrothermal method using Na-montmorillonite and lithium hydrate as raw materials. X-ray diffraction, scanning electron microscope and transmission electron microscope analysis show that the crystal phase of the products is composed of lithium silicate and the particle morphology of the sample is hollow microellipsoid at around 600 nm. Furthermore, the wall of the microellipsoid is constituted of mesopores and nanoparticles with a size range within 20 to 40 nm. The specific area and aperture of the samples measured by Brunauer-Emmett-Teller method is 32.3 m2•g−1 and 17.1 nm, respectively. Finally, a formation mechanism of the hollow microellipsoid was proposed to guide further exploration.
{"title":"Hollow microellipsoid lithium silicate with mesoporosity and its formation mechanism","authors":"Jing Gao, Tong Mingxing, W. Lei, Xuanhui Zhang, Guohua Li","doi":"10.1504/IJNM.2019.10014844","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10014844","url":null,"abstract":"Lithium silicate is an important sorbent to capture CO2. Herein, hollow microellipsoids of lithium silicate with mesoporosity were prepared by a hydrothermal method using Na-montmorillonite and lithium hydrate as raw materials. X-ray diffraction, scanning electron microscope and transmission electron microscope analysis show that the crystal phase of the products is composed of lithium silicate and the particle morphology of the sample is hollow microellipsoid at around 600 nm. Furthermore, the wall of the microellipsoid is constituted of mesopores and nanoparticles with a size range within 20 to 40 nm. The specific area and aperture of the samples measured by Brunauer-Emmett-Teller method is 32.3 m2•g−1 and 17.1 nm, respectively. Finally, a formation mechanism of the hollow microellipsoid was proposed to guide further exploration.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48136910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018331
Yanxin Bian, Zhonghua Zhang, J. Su, Changming Mao, Guicun Li
Khaki-coloured niobium oxides (H-Nb2O5) nanochains were synthesised via a facile low temperature solution-based method combined with hydrogenation treatment process. The nano-sized chain-like architectures facilitate the fast lithium ion diffusions. Meanwhile, the hydrogen reduction process can effectively endow Nb2O5 with partial Nb4+ species and/or oxygen vacancies, resulting in a large enhancement of its intrinsic electronic conductivity. When evaluated for lithium storage capacity, the H-Nb2O5 showed twice the rate capability at 20 C compared to that of the pristine Nb2O5 nanochains due to the combination of the reduced path and Nb4+ doping induced high electronic conductivity. This facile hydrogenation method is promising for designing high performance carbon-free electrode materials for lithium ion batteries.
{"title":"Khaki-coloured niobium oxide nanochains with enhanced lithium storage performances","authors":"Yanxin Bian, Zhonghua Zhang, J. Su, Changming Mao, Guicun Li","doi":"10.1504/IJNM.2019.10018331","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018331","url":null,"abstract":"Khaki-coloured niobium oxides (H-Nb2O5) nanochains were synthesised via a facile low temperature solution-based method combined with hydrogenation treatment process. The nano-sized chain-like architectures facilitate the fast lithium ion diffusions. Meanwhile, the hydrogen reduction process can effectively endow Nb2O5 with partial Nb4+ species and/or oxygen vacancies, resulting in a large enhancement of its intrinsic electronic conductivity. When evaluated for lithium storage capacity, the H-Nb2O5 showed twice the rate capability at 20 C compared to that of the pristine Nb2O5 nanochains due to the combination of the reduced path and Nb4+ doping induced high electronic conductivity. This facile hydrogenation method is promising for designing high performance carbon-free electrode materials for lithium ion batteries.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42776854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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