Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
二维褶皱状V2O5纳米材料的制备和储锂性能 | |
Alternative Title | Preparation and Lithium Storage Performance of Two Dimensional Fold-like V2O5 Nanomaterial |
李延伟1,2; 谢志平1; 刘参政1; 姚金环1; 姜吉琼1; 杨建文1 | |
2017-05 | |
Source Publication | 材料研究学报 |
ISSN | 1005-3093 |
Volume | 31Issue:5Pages:374-380 |
Abstract | 用溶胶凝胶法制备V_2O_5凝胶,调节凝胶的p H值和后续的冷冻干燥以及退火,制备出V_2O_5纳米材料。X射线衍射(XRD)和场发射扫描电镜(FESEM)的测试结果表明,该样品是一种具有大面积二维褶皱形貌的正交晶相V_2O_5纳米材料,每个纳米片又由大量的纳米小颗粒构成。使用循环伏安(CV)、交流阻抗(EIS)、电位驰豫(PRT)和充放电测试等手段表征了样品的储锂性能,结果表明,因具有独特的二维褶皱纳米结构,该纳米材料具有比已经商业化的V_2O_5更高的放电比容量、更好的大电流充放电性能、优异的电化学循环稳定性和更好的电化学反应动力学性能。 |
Other Abstract | V2O5 gel was prepared by sol-gel method and V2O5 nanomaterial was fabricated by freeze- drying the V2O5 gel with proper pH value and followed by annealing treatment. XRD and FESEM results revealed that the prepared V2O5 nanomaterial consists of a single orthorhombic phase small V2O5 nanoparticles with alarge are a two-dimensional fold-like morphology. The lithium storage performance of the prepared V2O5 nanomaterial was characterized by cyclic voltammetry(CV), electrochemical imped- ance spectroscopy(EIS), potential relaxation technique(PRT), and charge-discharge tests. Due to the unique two-dimensional fold-like nanostructure, the prepared V2O5 nanomaterial exhibits much higher specific discharge capacity, better high rate performance, excellent cycling stability, and enhanced elec- trochemical reaction kinetics rather than the commercial V2O5. Therefore, the two-dimensional fold-like V2O5 nanomaterial is a very promising cathode material for lithium-ion batteries. K |
Keyword | 材料合成与加工工艺 V2O5 溶胶凝胶法 正极材料 储锂性能 synthesizing and processing technics,V2O5, sol-gel method, cathode material, lithium storage performance |
DOI | 10.11901/1005.3093.2016.498 |
Language | 中文 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.giec.ac.cn/handle/344007/16562 |
Collection | 中国科学院广州能源研究所 |
Corresponding Author | 姚金环 |
Affiliation | 1.广西电磁化学功能物质重点实验室桂林理工大学化学与生物工程学院,桂林541004; 2.中国科学院可再生能源重点实验室,广州510640 |
Recommended Citation GB/T 7714 | 李延伟,谢志平,刘参政,等. 二维褶皱状V2O5纳米材料的制备和储锂性能[J]. 材料研究学报,2017,31(5):374-380. |
APA | 李延伟,谢志平,刘参政,姚金环,姜吉琼,&杨建文.(2017).二维褶皱状V2O5纳米材料的制备和储锂性能.材料研究学报,31(5),374-380. |
MLA | 李延伟,et al."二维褶皱状V2O5纳米材料的制备和储锂性能".材料研究学报 31.5(2017):374-380. |
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