• 文献标题:   Graphene aerogel encapsulated Co3O4 microcubes derived from prussian blue analog as integrated anode with enhanced Li-ion storage properties
  • 文献类型:   Article
  • 作  者:   WEN WX, XIE Y, WANG HY, ZHANG BH, HOU YL, CHEN JZ, ZHAO DL
  • 作者关键词:   lithiumion battery, anode material, metalorganic framework, graphene aerogel
  • 出版物名称:   CERAMICS INTERNATIONAL
  • ISSN:   0272-8842 EI 1873-3956
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.ceramint.2022.12.023 EA MAR 2023
  • 出版年:   2023

▎ 摘  要

In lithium-ion batteries (LIB), cobalt oxide is considered an ideal anode material because of its theoretical specific capacity of up to 890 mAh g(-1), abundant resources, and low price. However, the volume expansion during the charging and discharging process and its lower conductivity have hindered its development. In this work, a metal-organic framework (MOF) was used as an initial template, encapsulated in graphene aerogels (GA) by hydrothermal and programmed temperature-controlled annealing and eventually formed into Co3O4 micro-cubes@GA composite. GA acts as a three-dimensional conductive network and mechanical skeleton, providing high electrical conductivity and structural stability to the composites. Moreover, the precursor's high porosity and stable structure are retained after annealing treatment. As an anode, the best long cycle life of Co3O4 microcubes@GA was achieved when the graphene oxide (GO) concentration was 3.0 mg ml(- 1), reaching 1234.9 mAh g(-1) after 200 cycles at 1 A g(- 1) with a coulomb efficiency (CE) of 98.97%.