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- Title
Co<sub>3</sub>O<sub>4</sub>-C yolk-shell hollow spheres derived from ZIF-12-PVP@GO for superior anode performance in lithium-ion batteries.
- Authors
Ding, Xingxing; Ge, Xianghong; Xing, Congcong; Liu, Yanyan; Li, Tongjun; Li, Xingsheng; Ma, Tianlei; Shen, Ruofan; Liang, Erjun; Cao, Huaqiang; Li, Baojun
- Abstract
Transitional metal oxides have attracted increasing attention as the most promising anode material for lithium-ion batteries (LIBs). However, due to the poor ionic conductivity and great structural changes in the process of Li+ insertion and extraction, the performance of the pristine materials in batteries still has a far way to go to satisfy requirements. In this article, using spherical ZIF-12 as a pyrolysis precursor, two Co3O4 hollow core-shell carbon nanocomposites (CHS@C and CHS@CG) were fabricated via a molecular precursor pyrolysis strategy. The synergistic effect of the yolk-shell hollow nanosphere structure shortens the diffusion path of ions, increases the contact area between the electrode and electrolyte, and provides a buffer space for the volume change in the electrochemical reaction. Both materials have excellent structural stability and good electrical conductivity. In comparison, the performance of CHS@CG is better, and the reversible specific capacity reaches 831 mAh·g−1 at 0.2 C after 400 cycles. In the galvanostatic charge–discharge process, the Coulombic efficiency reaches nearly 100%, exhibiting a good reversible cycle. The synthesis method of these electrode materials can provide a reference for making other energy storage equipments.
- Subjects
SUPERIONIC conductors; LITHIUM-ion batteries; POLYELECTROLYTES; ENERGY storage equipment; ELECTRIC conductivity; IONIC conductivity; ANODES
- Publication
Journal of Materials Science, 2023, Vol 58, Issue 1, p355
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-022-08047-1