Binder-free lithium ion battery electrodes made of silicon and pyrolized lignin†

Tao Chen, Qinglin Zhang, Jiagang Xu, Jie Pan, Yang Tse Cheng

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

The synthesis, characterization, and performance of a binder-free negative electrode for a lithium-ion battery, consisting of renewable biopolymer lignin and silicon nanoparticles, are reported. By mixing, coating, and subsequent pyrolization, we fabricated uniformly interconnected core–shell composite films of Si/C directly on the current collector, allowing for the assembly of coin-cells without the need of binder and conductive carbon. An excellent electrochemical performance was observed with a high specific capacity of 1557 mA h g1 and a stable rate performance from 0.18 A g1 to 1.44 A g1. Moreover, the Si–pLig electrode can be reversibly cycled at 0.54 A g1 with 89.3% capacity retention over 100 cycles. We also unveil a beneficial effect of 0.5% polyethylene oxide (PEO) on the morphology and electrochemical behavior of the Si/C composite electrodes.

Original languageEnglish
Pages (from-to)29308-29313
Number of pages6
JournalRSC Advances
Volume6
Issue number35
DOIs
StatePublished - 2016

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2016.

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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