• 文献标题:   Enhanced lithium storage capability of Li3V2(PO4)(3)@C co-modified with graphene and Ce3+ doping as high-power cathode for lithium-ion batteries
  • 文献类型:   Article
  • 作  者:   TONG JJ, FANG YH
  • 作者关键词:   lithiumion batterie, li3v2 po4 3 @c cathode, graphene, ce3+ doping, lithium storage capability
  • 出版物名称:   JOURNAL OF PHYSICS CHEMISTRY OF SOLIDS
  • ISSN:   0022-3697 EI 1879-2553
  • 通讯作者地址:   Guangzhou Maritime Univ
  • 被引频次:   6
  • DOI:   10.1016/j.jpcs.2017.08.029
  • 出版年:   2017

▎ 摘  要

As a high-voltage cathode material, monoclinic Li3V2(PO4)(3) has been proposed as the next-generation commercial electrode for lithium-ion batteries. Nevertheless, it remains a practical challenge to improve the poor electronic conductivity of Li3V2(PO4)(3). Herein, we first design and fabricate the Li3V2(PO4)(3)@C (LVP@C) nanocrystals further modified by graphene and doped with Ce3+-ion via a facile sol-gel method. The Ce3+ doping can form a continuous conductive pathway in the electrode and thus improve the intrinsic electronic conductivity of Li3V2(PO4)(3) material. Meanwhile, the residual carbon layer and graphene can also construct a conductive network, which is helpful to enhance the apparent conductivity of Li3V2(PO4)(3). Therefore, the graphene and Ce3+ doping co-decorated LVP@C (G-LVceP@C) composite exhibits better lithium storage capability than the LVP@C and Ce3+-doped LVP@C (LVeeP@C) materials. This novel design provides an effective strategy for the preparation of other electrodes for lithium-ion batteries.