期刊
JOURNAL OF POWER SOURCES
卷 379, 期 -, 页码 191-196出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.01.054
关键词
Sandwich-like; Hollow spheres; SnO2/Sn; Core/void/shell structure; Lithium ion batteries
资金
- NNSF of China [51602263, 51473136, 21575116]
- Fundamental Research Funds for the Central Universities, China [XDJK2015C099, SWU114079]
- China Postdoctoral Science Foundation [2015M572427, 2016T90827]
- Chongqing Postdoctoral Research Project [xm2015019]
As lithium ion batteries (LIBs) anode, SnO2 suffers fast capacity fading due to its large volume expansion during discharge/charge process. To overcome the problem, sandwich-like C@SnO2/Sn/void@C hollow spheres (referred as C@SnO2/Sn/void@C HSs) are prepared by in-situ polymerization and carbonization, using hollow SnO2 as self-template and dopamine as carbon source. The C@SnO2/Sn/void@C HSs possesses the merits of hollow and core/void/shell structure, so that they can accommodate the volume change under discharge/charge process, shorten the transmission distance of Li ions, own more contact area for the electrolyte. Thanks to these advantages, C@SnO2/Sn/void@C HSs display excellent electrochemical performance as anode materials for LIBs, which deliver a high capacity of 786.7 mAh g(-1) at the current density of 0.5 A g(-1) after 60 cycles. The simple synthesis method for C@SnO2/Sn/void@C HSs with special structure will provide a promising method for preparing other anode materials for LIBs.
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