以乙炔黑为碳源制备Li3V2(PO4)3/C复合材料

doi:10.13438/j.cnki.jdzk.2021.03.013

吉首大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (3): 73-78.DOI: 10.13438/j.cnki.jdzk.2021.03.013

以乙炔黑为碳源制备Li₃V₂(PO₄)₃/C复合材料

刘赛求，江友良，邹秋玲，马渤然，向延鸿，伍建华，熊利芝，吴贤文

（1.吉首大学物理与机电工程学院，湖南吉首 416000； 2.吉首大学药学学院，湖南吉首 416000；3.吉首大学化学与化工学院，湖南吉首 416000）

出版日期:2021-05-25 发布日期:2021-08-30
通讯作者: （1987—），女，湖南慈利人，吉首大学物理与机电工程学院副教授，博士，主要从事锂离子电池富锂锰基正极材料研究；E-mail:yhx@jsu.edu.cn.
基金资助:
国家自然科学基金资助项目(51862008，52064014，51762017和51762016)；湖南省自然科学基金资助项目(2020JJ5457，2020JJ4505)；湖南省教育厅科学研究项目(19A416，S201910531053)；吉首大学校级研究课题(Jdy20030)

Preparation of Li₃V₂(PO₄)₃/C Composite Material Using Acetylene Black as Carbon Source

LIU Saiqiu, JIANG Youliang, ZOU Qiuling, MA Boran, XIANG Yanhong, WU Jianghua, XIONG Lizhi, WU Xianwen

(1. School of Physics and Mechatronic Engineering, Jishou University, Jishou 416000, Hunan China;2. College of Pharmacy, Jishou University, Jishou 416000,Hunan China; 3. School of Chemistry and Chemical Engineering Jishou University, Jishou 416000, Hunan China)

Online:2021-05-25 Published:2021-08-30

摘要/Abstract

摘要：以乙炔黑为碳源，采用溶胶凝胶法分步煅烧制备Li₃V₂(PO₄)₃/C，考察碳包覆量对材料的形貌、结构以及电化学性能的影响.结果表明，碳包覆没有破坏Li₃V₂(PO₄)₃的单斜结构(P21/n)，2倍乙炔黑包覆样（C20-LVP）的结晶度良好，包覆层为7 nm.0.1C倍率下，2倍乙炔黑包覆样的放电比容量由空白样（C00-LVP）的103.6 mAh·g-1提升到120.3 mAh/g，循环60次后放电比容量仍有104.5 mAh/g，保持率达91%.

关键词： 锂离子电池, 正极材料, 磷酸钒锂, 碳包覆, 乙炔黑, 溶胶凝胶

Abstract: In this paper, Li₃V₂(PO₄)₃/C material is successfully prepared by the simple sol-gel method and treated by further calcining. The effect of carbon coating on the morphology, structure and electrochemical performance of the material is comprehensively investigated. It's demonstrated that the monoclinic structure (P21/n) of Li₃V₂(PO₄)₃/C retains complete after carbon coating. The sample with 7 nm coating layer presents excellent crystallinity, which coated by 2 times contents （C20-LVP） of carbon. The electrochemical performance has been improved a lot, with its discharge capacity increasing to 120.3 mAh/g compared with 103.6mAh/g of the sample without carbon coating（C00-LVP）. In addition, a good retention rate of 91% can be obtained, since the discharge ratio can achieve 104.5 mAh/g the after 60 cycles.

Key words: lithium ion battery, cathode materials, lithium vanadium phosphate, carbon coating, acetylene black, sol-gel

刘赛求, 江友良, 邹秋玲, 马渤然, 向延鸿, 伍建华, 熊利芝, 吴贤文. 以乙炔黑为碳源制备Li₃V₂(PO₄)₃/C复合材料[J]. 吉首大学学报（自然科学版）, 2021, 42(3): 73-78.

LIU Saiqiu, JIANG Youliang, ZOU Qiuling, MA Boran, XIANG Yanhong, WU Jianghua, XIONG Lizhi, WU Xianwen. Preparation of Li₃V₂(PO₄)₃/C Composite Material Using Acetylene Black as Carbon Source[J]. Journal of Jishou University(Natural Sciences Edition), 2021, 42(3): 73-78.

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以乙炔黑为碳源制备Li₃V₂(PO₄)₃/C复合材料

Preparation of Li₃V₂(PO₄)₃/C Composite Material Using Acetylene Black as Carbon Source

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