期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 11, 页码 9662-9668出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b16396
关键词
Co3O4 rose-spheres; graphene; graphene-embedded Co3O4 rose-spheres; electrostatic self-assembly; lithium ion batteries
资金
- National Natural Science Foundation of China [51272075, 51372080, 51238002]
- China Scholarship Council
- College of Arts and Sciences, University of Missouri Kansas City
Co3O4 has been widely studied as a promising candidate as an anode material for lithium ion batteries. However, the huge volume change and structural strain associated with the Li+ insertion and extraction process leads to the pulverization and deterioration of the electrode, resulting in a poor performance in lithium ion batteries. In this paper, Co3O4 rose-spheres obtained via hydrothermal technique are successfully embedded in graphene through an electrostatic self assembly process. Graphene-embedded Co3O4 rose-spheres (G-Co3O4) show a high reversible capacity, a good cyclic performance, and an excellent rate capability, e.g., a stable capacity of 1110.8 mAh g(-1) at 90 mA g(-1) (0.1 C), and a reversible capacity of 462.3 mAh g(-1) at 1800 mA g(-1) (2 C), benefitted from the novel architecture of graphene-embedded Co3O4 rose-spheres. This work has demonstrated a feasible strategy to improve the performance of Co3O4 for lithium-ion battery application.
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