Fabrication of binder-free pencil-trace electrode for lithium-ion battery: Simplicity and high performance

Research output: Contribution to journalArticle

Abstract

(Graph Presented) A binder-free and solvent-free pencil-trace electrode with intercalated clay particles (mainly SiO2) is prepared via a simple pencil-drawing process on grinded Cu substrate with rough surface and evaluated as an anode material for lithium-ion battery. The pencil-trace electrode exhibits a high reversible capacity of 672 mA h g-1 at 100 mA g-1 after 100 cycles, which can be attributed to the unique multilayered graphene particles with lateral size of few micrometers and the formation of LixSi alloys generated by interaction between Li+ and an active Si produced in the electrochemical reduction of nano-SiO2 in the clay particles between the multilayered graphene particles. The multilayered graphene obtained by this process consists of 1 up to 20 and occasionally up to 50 sheets and thus can not only help accommodating the volume change and alleviating the structural strain during Li ion insertion and extraction but also allow rapid access of Li ions during charge-discharge cycling. Drawing with a pencil on grinded Cu substrate is not only very simple but also cost-effective and highly scalable, easily establishing graphitic circuitry through a solvent-free and binder-free approach.

Details

Authors
  • Hyean Yeol Park
  • Min Sik Kim
  • Tae Sung Bae
  • Jinliang Yuan
  • Jong-Sung Yu
Organisations
External organisations
  • Daegu Gyeongbuk Institute of Science and Technology
  • Korea Basic Science Institute
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering
  • Other Chemical Engineering
Original languageEnglish
Pages (from-to)4415-4423
Number of pages9
JournalLangmuir
Volume32
Issue number18
Publication statusPublished - 2016
Publication categoryResearch
Peer-reviewedYes