Ce3+-doped Li4Ti5O12 with CeO2 surface modification by a sol-gel method for high-performance lithium-ion batteries

doi:10.1016/j.electacta.2015.12.103

GIEC OpenIR > 中国科学院广州能源研究所

	Ce3+-doped Li4Ti5O12 with CeO2 surface modification by a sol-gel method for high-performance lithium-ion batteries
	Zhang, Qianyu 1; Liu, Yan 1; Lu, Huansheng 1; Tang, Daoping 1; Ouyang, Chuying 2; Zhang, Lingzhi 1
	2016-01-20
发表期刊	ELECTROCHIMICA ACTA
卷号	189 页码:147-157
摘要	Aliovalently Ce3+-doped Li4Ti5O12 (LTO) is firstly synthesized by a sol-gel method using Ce(CH3COOH)(3) as the dopant and CH3COOLi/(C4H9O)(4)Ti as starting materials. The structure and morphology of Ce3+-doped LTO with various doping level (Li4Ti5-xCexO12; x = 0, 0.05, 0.10, 0.15 and 0.20) are characterized by XRD, EDX, Raman, XPS, SEM and TEM. Pure phase Ce3+-doped Li4Ti5O12 is obtained when x <= 0.10, while CeO2 impurity is observed when x > 0.10. The Ce3+-doped LTO with appropriate content of CeO2 impurity shows much improved rate capability and specific capacity compared with the pristine and Ce3+-doped LTO without CeO2 impurity. Particularly, the Li4Ti5-xCexO12 (x = 0.15) electrode exhibits the best rate capability and long-term cycling stability among all samples, delivering a capacity of 120.0 mAh g(-1) at 5C even after 1000 cycles. This work demonstrates that aliovalently Ce3+-doping is an effective approach for enhancing LTO's rate-performance. (C) 2015 Elsevier Ltd. All rights reserved.
文章类型	Article
关键词	Lithium-ion Batteries Anode Material Li4ti5o12 Doping Rate Capability
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.electacta.2015.12.103
研究领域[WOS]	Electrochemistry
关键词[WOS]	HIGH-RATE CAPABILITY ; DOPED LI4TI5O12 ; ANODE MATERIAL ; ELECTROCHEMICAL PERFORMANCE ; SPINEL ; ELECTRODE ; COMPOSITE ; GRAPHENE ; STORAGE ; CERIA
收录类别	SCI
语种	英语
WOS类目	Electrochemistry
WOS记录号	WOS:000371140300018
引用统计	被引频次：64[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/11129
专题	中国科学院广州能源研究所
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 2.Jiangxi Normal Univ, Dept Phys, Nanchang 330022, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qianyu,Liu, Yan,Lu, Huansheng,et al. Ce3+-doped Li4Ti5O12 with CeO2 surface modification by a sol-gel method for high-performance lithium-ion batteries[J]. ELECTROCHIMICA ACTA,2016,189:147-157.
APA	Zhang, Qianyu,Liu, Yan,Lu, Huansheng,Tang, Daoping,Ouyang, Chuying,&Zhang, Lingzhi.(2016).Ce3+-doped Li4Ti5O12 with CeO2 surface modification by a sol-gel method for high-performance lithium-ion batteries.ELECTROCHIMICA ACTA,189,147-157.
MLA	Zhang, Qianyu,et al."Ce3+-doped Li4Ti5O12 with CeO2 surface modification by a sol-gel method for high-performance lithium-ion batteries".ELECTROCHIMICA ACTA 189(2016):147-157.