期刊
ADVANCED MATERIALS
卷 29, 期 44, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703028
关键词
all-integrated electrodes; binding energy; double-shelled-yolk-structured; lithium-ion batteries; multicomponent interlinking
类别
资金
- Australian Government Research Training Program Scholarship
- Australian Research Council (ARC) [FT150100109]
- Auto CRC [1-117]
- Baosteel-Australia Joint Research and Development Centre (BAJC) [BA14006]
The concept of an all-integrated design with multifunctionalization is widely employed in optoelectronic devices, sensors, resonator systems, and microfluidic devices, resulting in benefits for many ongoing research projects. Here, maintaining structural/electrode stability against large volume change by means of an all-integrated design is realized for silicon anodes. An all-integrated silicon anode is achieved via multicomponent interlinking among carbon@void@silica@silicon (CVSS) nanospheres and cross-linked carboxymethyl cellulose and citric acid polymer binder (c-CMC-CA). Due to the additional protection from the silica layer, CVSS is superior to the carbon@void@silicon (CVS) electrode in terms of long-term cyclability. The as-prepared all-integrated CVSS electrode exhibits high mechanical strength, which can be ascribed to the high adhesivity and ductility of c-CMC-CA binder and the strong binding energy between CVSS and c-CMC-CA, as calculated based on density functional theory (DFT). This electrode exhibits a high reversible capacity of 1640 mA h g(-1) after 100 cycles at a current density of 1 A g(-1), high rate performance, and long-term cycling stability with 84.6% capacity retention after 1000 cycles at 5 A g(-1).
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