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W6+ & Br- codoped Li4Ti5O12 anode with super rate performance for Li-ion batteries
Zhang, Qianyu1; Lu, Huansheng2; Zhong, Haoxiang1; Yan, Xiaodan1; Ouyang, Chuying2; Zhang, Lingzhi1
2015
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
Volume3Issue:26Pages:13706-13716
AbstractWe report a novel Li4Ti5-xWxO12-xBrx (x = 0.025, 0.050 and 0.100) anode material simultaneously doped with W6+ and Br- ions prepared by a simple solid-state reaction in air, aiming to significantly improve electrical conductivity of Li4Ti5O12. Our theoretical calculation predicts that codoping with W6+ on the Ti4+ site and Br- on the O2- site can remarkably narrow down the band gap, and thus facilitate the electron transport in the lattice of LTO. The comparative experiments prove that W & Br-codoped LTO exhibits higher electrical conductivity compared with undoped LTO as expected, thus leading to improved rate capability and specific capacity. Particularly, Li4Ti5 xWxO12 xBrx (x = 0.05) exhibits the best rate capability and cycling stability with an outstanding capacity retention of 88.7% even at 10 C rate after 1000 cycles. This codoping strategy with high valence transition metal and halide ions holds promise to be applied to other insulating cathode materials suffering from inferior electrical conductivity.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c5ta02784e
WOS Subject ExtendedChemistry ; Energy & Fuels ; Materials Science
WOS KeywordINITIO MOLECULAR-DYNAMICS ; DOPED LI4TI5O12 ; ELECTROCHEMICAL PERFORMANCE ; RATE CAPABILITY ; X LESS ; CYCLING PERFORMANCE ; CATHODE MATERIAL ; LITHIUM ; SPINEL ; CHARGE
Indexed BySCI
Language英语
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000356865300013
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Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10514
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,Lu, Huansheng,Zhong, Haoxiang,et al. W6+ & Br- codoped Li4Ti5O12 anode with super rate performance for Li-ion batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2015,3(26):13706-13716.
APA Zhang, Qianyu,Lu, Huansheng,Zhong, Haoxiang,Yan, Xiaodan,Ouyang, Chuying,&Zhang, Lingzhi.(2015).W6+ & Br- codoped Li4Ti5O12 anode with super rate performance for Li-ion batteries.JOURNAL OF MATERIALS CHEMISTRY A,3(26),13706-13716.
MLA Zhang, Qianyu,et al."W6+ & Br- codoped Li4Ti5O12 anode with super rate performance for Li-ion batteries".JOURNAL OF MATERIALS CHEMISTRY A 3.26(2015):13706-13716.
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