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Ce3+-doped Li4Ti5O12 with CeO2 surface modification by a sol-gel method for high-performance lithium-ion batteries
Zhang, Qianyu1; Liu, Yan1; Lu, Huansheng1; Tang, Daoping1; Ouyang, Chuying2; Zhang, Lingzhi1
2016-01-20
Source PublicationELECTROCHIMICA ACTA
Volume189Pages:147-157
AbstractAliovalently 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.
SubtypeArticle
KeywordLithium-ion Batteries Anode Material Li4ti5o12 Doping Rate Capability
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.electacta.2015.12.103
WOS Subject ExtendedElectrochemistry
WOS KeywordHIGH-RATE CAPABILITY ; DOPED LI4TI5O12 ; ANODE MATERIAL ; ELECTROCHEMICAL PERFORMANCE ; SPINEL ; ELECTRODE ; COMPOSITE ; GRAPHENE ; STORAGE ; CERIA
Indexed BySCI
Language英语
WOS SubjectElectrochemistry
WOS IDWOS:000371140300018
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11129
Collection中国科学院广州能源研究所
Affiliation1.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
Recommended Citation
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.
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