Synthesis, structure, and electrochemical performance of V3BO6 nanocomposite: A new vanadium borate as high-rate anode for Li-ion batteries

时间:2020-07-07作者:浏览量:66


Synthesis, structure, and electrochemical performance of V3BO6 nanocomposite: A new vanadium borate as high-rate anode for Li-ion batteries

作者:Zeng, XX (Zeng, Xinxuan)[ 1 ] ; Kuang, Q (Kuang, Quan)[ 1 ] ; Fan, QH (Fan, Qinghua)[ 1 ] ; Dong, YZ (Dong, Youzhong)[ 1 ] ; Zhao, YM (Zhao, Yanming)[ 1,2,3 ] ; Chen, SY (Chen, Siyuan)[ 1 ] ; Liu, SH (Liu, Shenghong)[ 1 ]


ELECTROCHIMICA ACTA


卷: 335

文献号: 135661


DOI: 10.1016/j.electacta.2020.135661


出版年: MAR 1 2020


文献类型:Article


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摘要

A new vanadium borate, V3BO6, with the norbergite structure has been synthesized via an elaborate solid-state reaction. The compound with the highest purity of 76% is obtained by using vanadyl acetylacetonate as the precursor and trace aluminum oxide as the nucleation catalyst. Vanadyl acetylacetonate also serves as the carbon source of V3BO6, which improves electrical conductivity and limits particle size. Trace A1203 promotes the formation of BO4 tetrahedrons instead of BO3 triangles. The unit cell of V3BO6 with a = 10.0202 (4) angstrom, b = 8.5589 (4) angstrom, c = 4.4525 (3) angstrom, and Vol. = 381.85 (3) angstrom(3) in space group Pnma is determined by Rietveld multiphase refinement of the X-ray powder diffraction pattern. The difficulty in synthesis of V3BO6 ascribes to the structural distortion of the VO6 octahedron. The synthesized V3BO6 nanocomposite is a tri-phase composite with V3BO6 (76.14%), V2O3 (18.09%) and VBO3 (5.77%). As an anode for Li-ion batteries, V3BO6 nanocomposite electrode shows an initial discharge capacity of similar to 1071 mAh g(-1) (0.05-3 V vs. Li) at a current density of 10 mA g(-1), and keeps a reversible capacity of similar to 375 mAh g(-1) after 90 cycles under a current density of 50 mA g(-1). Gratifyingly, V3BO6 nanocomposite delivers a high rate capability that the charge capacities are 629, 420, 396, 369, 329 mAh g(-1) at different current rates of 20, 50, 100, 200, 500 mA g(-1), respectively. (C) 2020 Elsevier Ltd. All rights reserved.


关键词

作者关键词:V3BO6; New compound; Vanadium borate; Anode; Li-ion batteries


KeyWords Plus:ELECTRODE MATERIALS; CRYSTAL-STRUCTURE; RECHARGEABLE LI; LITHIUM; RAMAN; TRANSITION; MECHANISM; CAPACITY; GLASSES; FE3BO6


作者信息

通讯作者地址: Kuang, Q (通讯作者)


显示更多South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510641, Peoples R China.

地址:


显示更多[ 1 ]‎ South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510641, Peoples R China

      [ 2 ]‎ South China Inst Collaborat Innovat, Dongguan 523808, Peoples R China

显示更多[ 3 ]‎ South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

电子邮件地址:sckq@scut.edu.cn


基金资助致谢

基金资助机构授权号

NSFC through NSFC Committee of China

51672086

program of China Scholarships Council

201906155026

Science and Technology Bureau of Guangdong Government

2017B030308005

Science and Technology Bureau from Dongguan Government

2019622163008

Fundamental Research Funds for the Central Universities through South China University of Technology

2018MS63

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出版商

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Electrochemistry


Web of Science 类别:Electrochemistry