4.3 Article

Stabilizing Co3O4 nanorods/N-doped graphene as advanced anode for lithium-ion batteries

Journal

FRONTIERS OF MATERIALS SCIENCE
Volume 15, Issue 2, Pages 216-226

Publisher

HIGHER EDUCATION PRESS
DOI: 10.1007/s11706-021-0552-x

Keywords

Co3O4; graphene; lithium-ion battery; anode

Funding

  1. China Postdoctoral Science Foundation [2019M662405, 2019M650612]
  2. Natural Science Foundation of Shandong Province [ZR2019BF047, ZR2020KE059]
  3. School City Integration in Zibo [2019ZBXC299]

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The study introduced a hierarchical Co3O4 nanorods/N-doped graphene material for lithium-ion batteries, which exhibited high specific capacities, indicating potential for the design and synthesis of similar electrode materials.
Tricobalt tetroxide (Co3O4) is one of the promising anodes for lithium-ion batteries (LIBs) due to its high theoretical capacity. However, the poor electrical conductivity and the rapid capacity decay hamper its practical application. In this work, we design and fabricate a hierarchical Co3O4 nanorods/N-doped graphene (Co3O4/NG) material by a facile hydrothermal method. The nitrogen-doped graphene layers could buffer the volume change of Co3O4 nanorods during the delithium/lithium process, increase the electrical conductivity, and profit the diffusion of ions. As an anode, the Co3O4/NG material reveals high specific capacities of 1873.8 mA center dot h center dot g(-1) after 120 cycles at 0.1 A center dot g(-1) as well as 1299.5 mA center dot h center dot g(-1) after 400 cycles at 0.5 A center dot g(-1). Such superior electrochemical performances indicate that this work may provide an effective method for the design and synthesis of other metal oxide/N-doped graphene electrode materials.

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