VSC-doping and VSU-doping of Na3V2-xTix(PO4)(2)F-3 compounds for sodium ion battery cathodes: Analysis of electrochemical performance and kinetic properties

doi:10.1016/j.nanoen.2018.02.053

	VSC-doping and VSU-doping of Na3V2-xTix(PO4)(2)F-3 compounds for sodium ion battery cathodes: Analysis of electrochemical performance and kinetic properties
	Zhang, Huamin 1,2; Ling, Moxiang 2,3; Xu, Wenbin 2; Zheng, Qiong 2; Li, Xianfeng 1,2; Yi, Hongming 2,3
刊名	NANO ENERGY
	2018-05-01
卷号	47 页码:340-352
关键词	Na3v2(Po4)(2)F-3 Ti Doping Electrochemical Performance Kinetic Properties Electron Conduction Sodium Ion diffusIon
ISSN号	2211-2855
DOI	10.1016/j.nanoen.2018.02.053
文献子类	Article
英文摘要	Ion doping strategy is employed to improve the rate performance of insulated Na3V2(PO4)(2)F-3 (NVPF) as cathode of sodium ion batteries. The concepts of VSU-doping (the valence state of the doping ion keeps unchanged during the synthesis) and VSC-doping (the valence state changes during the synthesis) have been introduced in this research. Titanium with different valence states (Ti2+, Ti3+, Ti4+) is selected as the doping element to investigate the VSU-doping and VSC-doping effects on NVPF for the first time. Based on a series of characterizations, it is verified that a moderate Ti doping is able to effectively improve the rate performance of NVPF through the enhancing of electron conduction and sodium ion diffusion, and the advantage is more obvious for the VSC-doping samples. Among all the NVPF-Ti-0.1(x+) (x = 2, 3, 4) samples, the NVPF-Ti-0.1(2+) treated with a VSC-doping (Ti source: TiO) possesses the minimum particle size distribution (similar to 40 nm), exhibits the highest initial specific capacity of 125 mA h g(-1) at 0.2 C, and a very high rate capability (104 mA h g(-1) at 40 C, 81 mA h g(-1) at 80 C, 41 mA h g(-1) at 200 C) as well, which has surpassed most of the reported results. When coupling with Na3V2(PO4)(2)F-3 (NVP) as the anode, the NVPFTi0.12+-NVP pseudo-symmetric full cell shows a high initial specific capacity of 99.6 mA h g(-1) at 0.2 C and an outstanding rate capability (60% of initial specific capacity at 40 C). Subsequently, a detailed investigation on the effects of the VSU-doping and VSC-doping processes on the battery performance, in combination with DFT calculations and analysis of kinetic properties, has been conducted, especially from the perspective of electron conduction and sodium ion diffusion.
WOS关键词	LIFE-SPAN CATHODE ; LITHIUM-ION ; HIGH-POWER ; DOPED LI3V2(PO4)(3) ; ENERGY-STORAGE ; NA3V2(PO4)(3) ; NANOPARTICLES ; DIFFRACTION ; NAFEPO4
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000430057000036
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169094]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Zhang, Huamin; Zheng, Qiong
作者单位	1.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Div Energy Storage, Dalian Inst Chem Phys, Zhongshan Rd 457, Dalian 116023, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Huamin,Ling, Moxiang,Xu, Wenbin,et al. VSC-doping and VSU-doping of Na3V2-xTix(PO4)(2)F-3 compounds for sodium ion battery cathodes: Analysis of electrochemical performance and kinetic properties[J]. NANO ENERGY,2018,47:340-352.
APA	Zhang, Huamin,Ling, Moxiang,Xu, Wenbin,Zheng, Qiong,Li, Xianfeng,&Yi, Hongming.(2018).VSC-doping and VSU-doping of Na3V2-xTix(PO4)(2)F-3 compounds for sodium ion battery cathodes: Analysis of electrochemical performance and kinetic properties.NANO ENERGY,47,340-352.
MLA	Zhang, Huamin,et al."VSC-doping and VSU-doping of Na3V2-xTix(PO4)(2)F-3 compounds for sodium ion battery cathodes: Analysis of electrochemical performance and kinetic properties".NANO ENERGY 47(2018):340-352.