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题名: Y-Doped Na3V2(PO4)(2)F-3 compounds for sodium ion battery cathodes: electrochemical performance and analysis of kinetic properties
作者: Liu, Wanqiu1;  Yi, Hongming1, 2;  Zheng, Qiong1;  Li, Xianfeng1, 3;  Zhang, Huamin1, 3
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2017-06-14
DOI: 10.1039/c7ta03133e
卷: 5, 页:10928-10935
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: To improve the intrinsic electronic conductivity and Na ion mobility of Na3V2(PO4)(2)F-3 (NVPF), Y(yttrium) atoms are introduced into the NVPF/C complex as a partial substitute for V(vanadium) through a sol-gel method. The effects of Y substitution on the crystal structure, morphology, electrochemical performance and kinetic properties of NVPF were investigated. Based on the battery performance comparison of the Na3V2-xYx(PO4)(3)/C (x = 0, 0.05, 0.1 and 0.2) samples, Na3V1.9Y0.1(PO4)(3)/C showed the best electrochemical performance and cycling stability. At a low rate of 0.5C, the 5 mol% Y-doped sample delivered a discharge capacity of 121.3 mA h g(-1), which was very close to the theoretical specific capacity. And even at a high rate of 50C, the discharge capacity achieved was higher than 80 mA h g(-1). After 200 cycles, the capacity retention of Na3V1.9Y0.1(PO4)(3)/C could still remain as high as 93.46% at 1C. From the morphology determination and analysis of kinetic properties, it was confirmed that the excellent electrochemical performance of Na3V1.9Y0.1(PO4)(3)/C was mainly due to the enhanced intrinsic electronic conductivity and Na ion mobility caused by introducing a moderate amount of Y to replace the V sites in the NVPF crystal structure. In order to get a better understanding of the relationship between the kinetic properties and the electrochemical performance in a sodium ion battery, a mass and electron transfer process model has been proposed for the first time in the present research.
关键词[WOS]: LITHIUM-ION ;  ELECTRODE MATERIAL ;  HIGH-POWER ;  CAPABILITY ;  CHALLENGES ;  COMPOSITE ;  GRAPHENE ;  CELL
语种: 英语
WOS记录号: WOS:000402734600018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152191
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Wanqiu,Yi, Hongming,Zheng, Qiong,et al. Y-Doped Na3V2(PO4)(2)F-3 compounds for sodium ion battery cathodes: electrochemical performance and analysis of kinetic properties[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5:10928-10935.
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