期刊
ELECTROCHIMICA ACTA
卷 299, 期 -, 页码 844-852出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.01.078
关键词
Layered-spinel heterostructure; Li-rich layered cathode; Hydrothermal; Full cell
资金
- National Key R&D Program of China [2016YFA0202600]
- Fundamental Research Funds for the Central Universities [20720180081]
- Double-First Class Foundation of Materials
- Intelligent Manufacturing Discipline of Xiamen University
The phase transition of Li-rich cathode materials occurred from surface to internal bulk structure leads to a poor stability of cycling performance, which seriously limits the development of the materials. Herein, with a facile designed hydrothermal method, the Li-rich layered oxides microspheres with the internal spinel phase are synthesized successfully. Compared with traditional hydrothermal method, a new heterostructured material exhibits high specific capacity remarkable cycling performance (247 mA h g(-1) at 0.5 C) with high energy density (852 Wh kg(-1)). Under galvanostatic charge-discharge pattern, the discharge capacity retains about 91.5% after 300 cycles at a large current of 2 C. The full cell fabrication with artificial graphite as an anode and the synthesized heterostructured Li1.2Mn0.54Co0.13Ni0.13O2 material as cathode exhibits the favorable property and the practical applicability. We expect that this strategy is going to pave new ways to accelerate the property and application of Li-rich cathode oxides materials. (C) 2019 Published by Elsevier Ltd.
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