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Study on the possibility of diagonal line rule in elemental doping effects in Li4Ti5O12 by mechanochemical method

文献类型：期刊论文

作者Liu, Zhifu2,3; Cao, Lei2,3; He, Fuling2,4; Zhang, Zhongwei2,3; Li, Da1; Zhao, Wei2,4; Qi, Tao2
刊名ELECTROCHIMICA ACTA
出版日期2022-08-01
卷号422页码:12
关键词Mechanochemical method Lithium-ion battery Doped Diagonal line rule
ISSN号0013-4686
DOI10.1016/j.electacta.2022.140485
英文摘要Li4Ti5O12 (LTO) were doped with the same group element (Zr4+), diagonal elements (Nb5+ and W6+), and same period element (V5+) of titanium, respectively, to quantitative doping effect and explore the possibility of diagonal line rule in doping. It is conducive to synthesis doping Li4Ti5O12 with excellent properties by the ammonia-assisted mechanical ball-milling method (AAMBM). Through systematic experimental comparison, Li4Ti4.95Nb0.05O12 (LTNO) exhibits finer particle, higher specific surface area, narrower band gap, and more excellent electrochemical performance compared to others, since Nb and Ti have similar ion polarization ability, standard electrode potential, and the conjugable outer electron arrangement (Nb 4d45s1 whose 5 s electrons can be delocalized to d orbits to form half full orbit state). Particularly, LTNO shows the highest initial first discharged capability up to 151 mAh g(-1) and the capacity retention of 90% at 5 C rate after 300 cycles, indicating both outstanding high-rate discharge performance and cycling stability. The doping factor was proposed to roughly quantify their doping effect of Zr4+, Nb5+, V5+, and W6+, by using the ratio of specific capacity values of doped LTO and pure LTO after 500 cycles at 5 C, which are 1.2, 1.86, 1.05, and 1.08, respectively.
WOS关键词PERFORMANCE ANODE MATERIALS ; SOLID-STATE REACTION ; EQUAL-TO 0.3 ; LITHIUM-ION ; ELECTROCHEMICAL PERFORMANCE ; DOPED LI4TI5O12 ; ELECTRONIC-STRUCTURE ; SPINEL LI4TI5O12 ; TITANIUM ALKOXIDES ; BASES HSAB
资助项目Self-deployed Projects of Ganjiang Innovation Academy, Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-3] ; National Key Research and Development Program of China[2020YFC1909602] ; National Science Foundation of China[22078343] ; National Science Foundation of China[21978304]
WOS研究方向Electrochemistry
语种英语
WOS记录号WOS:000808114300002
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Self-deployed Projects of Ganjiang Innovation Academy, Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Science Foundation of China
源URL[http://ir.ipe.ac.cn/handle/122111/53740]  
专题中国科学院过程工程研究所
通讯作者Li, Da; Zhao, Wei
作者单位1.China Minmetals Corp, Beijing 100027, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr green recycling strateg Met reso, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Zhifu,Cao, Lei,He, Fuling,et al. Study on the possibility of diagonal line rule in elemental doping effects in Li4Ti5O12 by mechanochemical method[J]. ELECTROCHIMICA ACTA,2022,422:12.
APA Liu, Zhifu.,Cao, Lei.,He, Fuling.,Zhang, Zhongwei.,Li, Da.,...&Qi, Tao.(2022).Study on the possibility of diagonal line rule in elemental doping effects in Li4Ti5O12 by mechanochemical method.ELECTROCHIMICA ACTA,422,12.
MLA Liu, Zhifu,et al."Study on the possibility of diagonal line rule in elemental doping effects in Li4Ti5O12 by mechanochemical method".ELECTROCHIMICA ACTA 422(2022):12.

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来源：过程工程研究所

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