A dimensionally stable and fast-discharging graphite–silicon composite Li-ion battery anode enabled by electrostatically self-assembled multifunctional polymer-blend coating

Fu-Sheng Li; Yu-Shiang Wu; Jackey Chou; Nae-Lih Wu

doi:10.1039/C4CC09825K

A dimensionally stable and fast-discharging graphite–silicon composite Li-ion battery anode enabled by electrostatically self-assembled multifunctional polymer-blend coating

Fu-Sheng Li,^a Yu-Shiang Wu,^b Jackey Chou^c and Nae-Lih Wu*^a

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* Corresponding authors

^a Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
E-mail: nlw001@ntu.edu.tw
Fax: +886-2-23627158
Tel: +886-2-23623040

^b Department of Mechanical Engineering, China University of Science and Technology, Taipei, 115, Taiwan

^c Long Time Technology Corp., Chun-Hsin Rd, New Taipei City, 221, Taiwan

Abstract

A high-performance graphite–Si composite anode for Li-ion batteries containing Si nanoparticles (NPs) attached onto graphite microparticles was synthesized by adopting a polymer-blend of poly(diallyl dimethyl-ammonium chloride) and poly(sodium 4-styrenesulfonate). The polymer-blend enabled uniform distribution of Si NPs during synthesis and served as a robust artificial solid–electrolyte interphase that substantially enhanced the cycle stability and rate performance of the composite electrode. The electrode exhibited a specific capacity of 450 mA h g⁻¹, 96% capacity retention at a 10 C-rate, 95% retention after 200 cycles, and the same electrode expansion behavior as a pristine graphite electrode.

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Publication details

The article was received on 09 Dec 2014, accepted on 22 Jan 2015 and first published on 22 Jan 2015

Article type: Communication

DOI: 10.1039/C4CC09825K

Author version available: Download Author version (PDF)

Citation: Chem. Commun., 2015,51, 8429-8431

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A dimensionally stable and fast-discharging graphite–silicon composite Li-ion battery anode enabled by electrostatically self-assembled multifunctional polymer-blend coating

F. Li, Y. Wu, J. Chou and N. Wu, Chem. Commun., 2015, 51, 8429
DOI: 10.1039/C4CC09825K
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Chemical Communications

A dimensionally stable and fast-discharging graphite–silicon composite Li-ion battery anode enabled by electrostatically self-assembled multifunctional polymer-blend coating

Abstract

Supplementary files

Publication details

A dimensionally stable and fast-discharging graphite–silicon composite Li-ion battery anode enabled by electrostatically self-assembled multifunctional polymer-blend coating

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