An all-integrated anode via interlinked chemical bonding between double-shelled–yolk-structured silicon and binder for lithium-ion batteries
Date
2017
Authors
Liu, Y.
Tai, Z.
Zhou, T.
Sencadas, V.
Zhang, J.
Zhang, L.
Konstantinov, K.
Guo, Z.
Liu, H.K.
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Journal article
Citation
Advanced Materials, 2017; 29(44):1703028-1-1703028-11
Statement of Responsibility
Yajie Liu, Zhixin Tai, Tengfei Zhou, Vitor Sencadas, Jian Zhang, Lei Zhang ... et al.
Conference Name
Abstract
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<sup>-1</sup> after 100 cycles at a current density of 1 A g<sup>-1</sup> , high rate performance, and long-term cycling stability with 84.6% capacity retention after 1000 cycles at 5 A g<sup>-1</sup> .
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© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim