共查询到20条相似文献,搜索用时 15 毫秒
1.
Liang Xing Gao Guohua Liu Yindan Ge Zeyuan Leng Pengliang Wu Guangming 《Journal of Sol-Gel Science and Technology》2017,82(1):224-232
Journal of Sol-Gel Science and Technology - The carbon nanotubes/vanadium oxide composites have been prepared through a facile hydrothermal method. Morphology features of the samples are... 相似文献
2.
Tao Yong Cao Yanbing Hu Guorong Chen Pengwei Peng Zhongdong Du Ke Jia Ming Huang Yong Xia Jin Li Luyu Xie Xiaoming 《Journal of Solid State Electrochemistry》2019,23(7):2243-2250
Journal of Solid State Electrochemistry - LiFePO4 cathode material is considered as prospective materials for lithium-ion batteries and attracted great interest because of excellent cyclic... 相似文献
3.
Environmentally friendly chemical route to vanadium oxide single-crystalline nanobelts as a cathode material for lithium-ion batteries 总被引:3,自引:0,他引:3
Orthorhombic V(2)O(5) single-crystalline nanobelts with widths of 100-300 nm, thicknesses of 30-40 nm, and lengths up to tens of micrometers have been synthesized on a large scale in a hydrogen peroxide aqueous solution by an environmentally friendly chemical route. Such nanobelts grow along the direction of [010]. The influence of the reaction time on the crystal structures and morphologies of the resulting products are investigated. A probable dehydration-recrystallization-cleavage mechanism for the formation of V(2)O(5) nanobelts is proposed. The experiments demonstrate that the use of a nanosized belt-like structure can considerably enhance the specific discharge capacity in lithium-ion batteries. 相似文献
4.
Hu Bingbing Li Li Xiong Xin Liu Lijun Huang Chunli Yu Danmei Chen Changguo 《Journal of Solid State Electrochemistry》2019,23(5):1315-1324
Journal of Solid State Electrochemistry - In this work, porous Cu-doped V2O5·nH2O thin film electrodes have been directly synthesized via low-temperature annealing and simple drop-casting... 相似文献
5.
A simple and versatile method for preparation of non-solid and solid V2O5 microspheres is developed. Non-solid and solid V2O5 microspheres can be controllably prepared via adjusting the mixed solvent volume ratio and reaction time at low temperature. Solid V2O5 microspheres display higher discharge capacity and better cycling performance than non-solid V2O5 microspheres as a cathode material for lithium-ion batteries, which is ascribed to smaller charge transfer and diffusion resistance. 相似文献
6.
Rathore Hem Kanwar Hariram Muruganandham Awasthi Kamlendra Kumar Manoj Sarkar Debasish Ganesha Mukhesh K. Singh Ashutosh K. Das Debanjan Shukla Ashok 《Journal of Solid State Electrochemistry》2022,26(9):2039-2048
Journal of Solid State Electrochemistry - Synthesis of partially carbonized tungsten oxide employing a simple, one-step, and scalable in-situ reduction/carbonization process is reported along with... 相似文献
7.
Qifei Li Xiangxiang Ye Hong Yu Chengfeng Du Wenping Sun Weiling Liu Hongge Pan Xianhong Rui 《中国化学快报》2022,33(5):2663-2668
Zinc-ion batteries(ZIBs), in particular quasi-solid-state ZIBs, occupy a crucial position in the field of energy storage devices owing to the superiorities of abundant zinc reserve, low cost, high safety and high theoretical capacity of zinc anode. However, as divalent Zn2+ions experience strong electrostatic interactions when intercalating into the cathode materials, which poses challenges to the structural stability and higher demand in Zn2+ions diffusion kinetics of the ... 相似文献
8.
通过水热-煅烧两步法制备了系列镍钴氧化物(NCO)纳米片。通过改变前驱体溶液中的镍、钴离子物质的量之比,进而调控NCO纳米片中的过渡金属离子比例。NCO纳米片的晶相、形貌和结构利用X射线衍射、扫描电子显微镜和X射线光电子能谱表征。此外,对NCO纳米片的电化学性能进行测试。结果表明,NCO-2(Ni1.95Co1Ox)纳米片在0.5 A·g-1电流密度下,比电容为1 096.88 F·g-1,且经过5 000次循环后具有78.26%的循环稳定性。以NCO-2为正极、活性碳为负极构成的非对称超级电容器,在功率密度为576 W·kg-1时,能量密度为57.70 Wh·kg-1。 相似文献
9.
通过水热-煅烧两步法制备了系列镍钴氧化物(NCO)纳米片。通过改变前驱体溶液中的镍、钴离子物质的量之比,进而调控NCO纳米片中的过渡金属离子比例。NCO纳米片的晶相、形貌和结构利用X射线衍射、扫描电子显微镜和X射线光电子能谱表征。此外,对NCO纳米片的电化学性能进行测试。结果表明,NCO-2(Ni1.95Co1Ox)纳米片在0.5 A·g-1电流密度下,比电容为1 096.88 F·g-1,且经过5 000次循环后具有78.26%的循环稳定性。以NCO-2为正极、活性碳为负极构成的非对称超级电容器,在功率密度为576 W·kg-1时,能量密度为57.70 Wh·kg-1。 相似文献
10.
Xi Zhang Xiaohong Sun Xin Li Xudong Hu Shu Cai Chunming Zheng 《Journal of Energy Chemistry》2021,(8):343-363
The emergency of high-power electrical appliances has put forward higher requirements for the power density of lithium-ion batteries.Vanadium oxides with large ... 相似文献
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A novel synthetic route for LiFePO_4/C cathode materials by addition of starch for lithium-ion batteries 总被引:1,自引:0,他引:1
Shao Hua Luo Zi Long Tang Jun Biao Lu Zhong Tai Zhang State Key Laboratory of New Ceramics Fine Processing Department of Materials Science Engineering Tsinghua University Beijing China Graduate School at Shenzhen Tsinghua University Shenzhen China 《中国化学快报》2007,18(2):237-240
LiFePO4/Carbon composite cathode material was prepared using starch as carbon source by spray-pelleting and subsequent pyrolysis in N2. The samples were characterized by XRD, SEM, Raman, and their electrochemical performance was investigated in terms of cycling behavior. There has a special micro-morphology via the process, which is favorable to electrochemical properties. The discharge capacity of the LiFePO4.C composite was 170 mAh g-1, equal to the theoretical specific capacity at 0.1 C rate. At 4 C current density, the specific capacity was about 80 mAh g-1, which can satisfy for transportation applications if having a more flat discharge flat. 相似文献
14.
Du Min Zhang Feng Zhang Xiaofei Dong Wentao Sang Yuanhua Wang Jianjun Liu Hong Wang Shuhua 《中国科学:化学(英文版)》2020,63(12):1767-1776
Science China Chemistry - Rechargeable aqueous zinc ion batteries (ZIBs), with the easy operation, cost effectiveness, and high safety, are emerging candidates for high-energy wearable/portable... 相似文献
15.
Xu Zichen Zhang Zhiqiang Li Mingyu Yin Huiling Lin Hongtao Zhou Jin Zhuo Shuping 《Journal of Solid State Electrochemistry》2019,23(12):3419-3428
Journal of Solid State Electrochemistry - In this work, three-dimensional ZnS/reduced graphene oxide/polypyrrole ternary composites were synthesized. The as-prepared composites are investigated as... 相似文献
16.
Arun Nagasubramanian Denis Yau Wai Yu Harry Hoster Madhavi Srinivasan 《Journal of Solid State Electrochemistry》2014,18(7):1915-1922
The effect of lithium boron oxide (LBO) coating on the electrochemical performance of orthorhombic LiMnO2 (o-LiMnO2) cathode for lithium-ion batteries is investigated. o-LiMnO2 synthesized via solid state synthesis technique is modified with LBO addition. The presence of LBO is identified via Fourier transform infrared spectroscopy analysis. o-LiMnO2 is observed to transform to a spinel-like phase during cycling which undergoes capacity fading. Studies indicate that the presence of 1–2 wt% LBO results in an improved capacity and better capacity retention with cycling. The pristine sample reveals a maximum specific capacity of 172 mAhg?1, whereas the LBO-modified samples display about 189.1 mAhg?1 in the cycling tests conducted at a rate of 50 mAg?1 in the voltage range of 2–4.5 V. After 70 cycles, the LBO-modified LiMnO2 displayed higher capacity retention of 175 mAhg?1 as compared to the pristine sample that exhibited 130 mAhg?1. By analyzing the charge–discharge behavior, it is observed that the capacity obtained from lithium insertion into the tetrahedral sites of the spinel structure is more or less constant throughout the cycling and that the bulk of the capacity loss is resulting when lithium is inserted into the octahedral sites of the spinel structure. Impedance measurement reveals a reduced charge-transfer resistance for the LBO-modified samples suggesting that the presence of LBO is countering capacity loss arising from insertion of lithium into the octahedral sites thus contributing to the overall cycling stability. 相似文献
17.
Jie Shu Miao Shui Dan Xu Dongjie Wang Yuanlong Ren Shan Gao 《Journal of Solid State Electrochemistry》2012,16(2):819-824
The overdischarge behaviors of LiFePO4, LiNiO2, and LiMn2O4 are thoroughly studied in different overlithiation voltage limitations. The results showed that LiFePO4 and LiMn2O4 cathode materials show high structure stability under the overdischarge process to 1.0 V. The microstructure of LiNiO2 is vulnerable to breakdown under the same testing condition. Fe-based olivine and Mn-based spinel cathode materials show
better cyclic calendar life than that of Ni-based layered material. When an extreme overdischarge parameter (down to 0.0 V)
is applied, all three samples experience an electrochemically driven irreversible solid-state amorphization process. Due to
this overlithiation reaction, the host structure is totally destroyed. Therefore, it is harmful to experience deep overdischarge
behaviors for most cathode materials. 相似文献
18.
Hualan Wang Qingli Hao Xujie Yang Lude Lu Xin Wang 《Electrochemistry communications》2009,11(6):1158-1161
A novel high-performance electrode material based on fibrillar polyaniline (PANI) doped with graphene oxide sheets was synthesized via in situ polymerization of monomer in the presence of graphene oxide, with a high conductivity of 10 S cm?1 at 22 °C for the obtained nanocomposite with a mass ratio of aniline/graphite oxide, 100:1. Its high specific capacitance of 531 F/g was obtained in the potential range from 0 to 0.45 V at 200 mA/g by charge–discharge analysis compared to 216 F/g of individual PANI. The doping and the ratio of graphene oxide have a pronounced effect on the electrochemical capacitance performance of the nanocomposites. 相似文献
19.
Yunting Wang Gaohui Du Di Han Wenhao Shi Jiahao Deng Huayu Li Wenqi Zhao Shukai Ding Qingmei Su Bingshe Xu 《Journal of Energy Chemistry》2024,(4):670-679
Layer-type LiNi0.9Mn0.1O2 is promising to be the primary cathode material for lithium-ion batteries(LIBs)due to its excellent electrochemical performance.Unfortunately,the cathode with high nickel content suffers from severely detrimental structural transformation that causes rapid capacity attenuation.Herein,site-specific dual-doping with Fe and Mg ions is proposed to enhance the structural stability of LiNi0.9Mn0.1O2.The Fe... 相似文献
20.
Mesoporous nickel oxide nanowires were synthesized by a hydrothermal reaction and subsequent annealing at 400?°C. The porous one-dimensional nanostructures were analysed by field-emission SEM, high-resolution TEM and N(2) adsorption/desorption isotherm measurements. When applied as the anode material in lithium-ion batteries, the as-prepared mesoporous nickel oxide nanowires demonstrated outstanding electrochemical performance with high lithium storage capacity, satisfactory cyclability and an excellent rate capacity. They also exhibited a high specific capacitance of 348?F?g(-1) as electrodes in supercapacitors. 相似文献