期刊
CARBON
卷 137, 期 -, 页码 475-483出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.05.056
关键词
-
资金
- National Key Research and Development Program of China [2017YFB0102204]
- Science and Technology Program of State Grid Corporation of China [DG71-16-024]
The use of reduced graphene oxide (rGO) as an environmentally friendly, multi-functional conductive binder is proposed as a novel strategy for manufacturing free-standing, flexible, high-performance hard carbon anodes for sodium ion batteries (NIBs). Compared with the conventional electrodes fabricated with insulating, fluorine-containing polymer binder (PVDF), the unique two-dimensional structure enable rGO can act as a strong binder and flexible backbone, resulting in free-standing, flexible hard carbon film, which can be directly used as anode for sodium ion batteries without any current collector. What's more, rGO also acts as active material, providing Na-storage capacity, as well as conductive addition to construct 3D conductive network, improving the rate performance of hard carbon. The obtained rGO-bonded hard carbon film with excellent flexibility can deliver a high reversible electrode capacity up to 372.4 mA h g(-1). After 200 charging/discharging cycles, the capacity loss is only 9%. The good electrochemical performance and excellent flexibility, combined with its facile fabrication approach make it to be a promising electrode candidate for developing next-generation flexible and environmentally friendly energy storage devices. (c) 2018 Elsevier Ltd. All rights reserved.
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