期刊
CHEMICAL ENGINEERING JOURNAL
卷 296, 期 -, 页码 349-355出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.03.126
关键词
Graphene; Lithium-ion battery; Ge@GeO2; Anode; Dual-protection
资金
- Department of Science and Technology of Guangdong [2014B010123001, 2015B090901030]
- Department of Science and Technology of Guangzhou
- Foshan shunde CG Electronic industry Co., Ltd.
A facile route has been adopted to yield amorphous carbon@graphene nanosheets@Ge@GeO2 (a-C@GNs@Ge@GeO2) composites, which were utilized as advanced anode materials for Li-ion battery. The rationally designed dual-protection for Ge@GeO2, i.e. encapsulation of amorphous carbon and cover of graphene nanosheets, has been successfully formed by magnesiothermic reduction and hydrothermal reaction followed by heat treatment. As a consequence, the designed composite electrode delivered a remarkable capacity of 729 mAh g(-1) at a current density of 800 mA g(-1) after 50 cycles at low temperature of 10 degrees C, with low capacity fading of 0.12% per cycle and excellent rate capability. Of special note is that high thermosensitivity of electrochemical performance of a-C@GNs@Ge@GeO2 has been observed. These advantages make a-C@GNs@Ge@GeO2 promising anode materials of advanced Li-ion battery for electric vehicle. (C) 2016 Elsevier B.V. All rights reserved.
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