Hydrogen Bond-Enabled High-ICE Anode for Lithium-Ion Battery Using Carbonized Citric Acid-Coated Silicon Flake in PAA Binder

Yonhua Tzeng, Cheng Ying Jhan, Guan Yu Chen, Kuo Ming Chiu, Yi Chen Wu, Pin Sen Wang

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A silicon-based lithium-ion battery (LIB) anode is extensively studied because of silicon’s abundance, high theoretical specific capacity (4200 mAh/g), and low operating potential versus lithium. Technical barriers to large-scale commercial applications include the low electrical conductivity and up to about 400% volume changes of silicon due to alloying with lithium. Maintaining the physical integrity of individual silicon particles and the anode structure is the top priority. We use strong hydrogen bonds between citric acid (CA) and silicon to firmly coat CA on silicon. Carbonized CA (CCA) enhances electrical conductivity of silicon. Polyacrylic acid (PAA) binder encapsulates silicon flakes by strong bonds formed by abundant COOH functional groups in PAA and on CCA. It results in excellent physical integrity of individual silicon particles and the whole anode. The silicon-based anode shows high initial coulombic efficiency, around 90%, and the capacity retention of 1479 mAh/g after 200 discharge-charge cycles at 1 A/g current. At 4 A/g, the capacity retention of 1053 mAh/g was achieved. A durable high-ICE silicon-based LIB anode capable of high discharge-charge current has been reported.

Original languageEnglish
Pages (from-to)8001-8010
Number of pages10
JournalACS Omega
Volume8
Issue number8
DOIs
Publication statusPublished - 2023 Feb 28

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering

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