1. A Novel Co3O4/MnO2/C Electrode with Hierarchical Heterostructure for High‐performance Lithium‐Ion Batteries.
- Author
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Xu, Ying, Ye, Xiongbiao, Qiu, Yiwei, Gan, Chuanhai, Huang, Liuqing, Tang, Xueyuan, and Luo, Xuetao
- Subjects
LITHIUM-ion batteries ,TRANSITION metal oxides ,SODIUM ions ,METAL-organic frameworks ,ELECTRODES ,HEAT treatment - Abstract
Transition metal oxides (TMOs) are promising materials for next‐generation lithium‐ion batteries while the lithium storage and cycling stability of TMOs are still limited. Herein, a novel Co3O4/MnO2/C composite using metal‐organic frameworks (MOFs) as sacrificial templates is reported. MnO2 and C shells are layer by layer coated on the MOF‐derived Co3O4/C samples via hydrothermal technique and heat treatment. When employed as anode materials for LIBs, the hierarchically heterostructured Co3O4/MnO2/C composites incorporate the merits of Co3O4, MnO2, and C, showing high Li storage performances at a current density of 0.2 A g−1 with an initial capacity of ∼1245.7 mAh g−1 and a reversible capacity of ∼854.9 mAh g−1 after 100 cycles, remarkable cycling stability, and excellent rate capability (almost 98 % recovery as the current density returns to the initial 0.2 A g−1, and especially, the specific capacity remains ∼587.6 mAh g−1 at a high current density of 2.0 A g−1). [ABSTRACT FROM AUTHOR]
- Published
- 2020
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