In situ crosslinked PVA-PEI polymer binder for long-cycle silicon anodes in Li-ion batteries

Zhen Liu, Shaojie Han, Chong Xu, Yuwen Luo, Na Peng, Chenyang Qin, Mingjiong Zhou, Wenqin Wang, Liwei Chen, Shigeto Okada

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25 Citations (Scopus)

Abstract

A novel polymer binder, synthesized via in situ thermal cross-linking of water-soluble polyvinyl alcohol (PVA) and poly(ethylene imine) (PEI) precursor, is applied as a functional network binder to enhance the electrochemical performance of a silicon anode. The Si anode with PVA-PEI binder exhibits high specific capacity (3072.9 mA h g-1) in the initial cycle, high initial coulombic efficiency of 83.8% and excellent long-term cycling stability (1063.1 mA h g-1 after 300 cycles). Furthermore, the Si anode containing PVA-PEI binder also exhibits excellent rate performance, reaching a high specific capacity of 1590 mA h g-1 even at high current density of 10 A g-1. These outstanding electrochemical properties are ascribed to the reversibly-deformable polymer network and the binder's strong adhesion to the silicon particles. This low-cost and eco-friendly polymer binder has great potential to be used for silicon anodes in next generation Li-ion batteries.

Original languageEnglish
Pages (from-to)68371-68378
Number of pages8
JournalRSC Advances
Volume6
Issue number72
DOIs
Publication statusPublished - Jan 1 2016

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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