Effect of MWCNT on the performances of the rounded shape natural graphite as anode material for lithium-ion batteries

Sang Young Lee, Jong Hyeok Park, Pilkyu Park, Jong Hun Kim, Soonho Ahn, Kyeong Jik Lee, Hyung Dong Lee, Jae Sung Park, Deok Hyeong Kim, Yeon Uk Jeong

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Multi-walled carbon nanotube (MWCNT) with bundle-type morphology was introduced as a new functional additive working as a particle connector or an expansion absorber in the anodes of lithium-ion batteries. By controlling the dispersion process, the MWCNT bundles were successfully divided and dispersed between the host particles. The composite anode consisting of rounded shape natural graphite and 2 wt.% of MWCNT exhibited the capacity of 300 mAh g -1 at 3 C rate and excellent cyclability. The well-dispersed MWCNT bundles made it possible to relieve the large strains developed at high discharge C rates and to keep the electrical contact between the host particles during repeated intercalation/deintercalation. This study has also emphasized that when high C-rate applications of lithium-ion batteries are targeted, it is important to get optimum content of MWCNT as well as uniform dispersion of their bundles in the composite anodes.

Original languageEnglish
Pages (from-to)951-956
Number of pages6
JournalJournal of Solid State Electrochemistry
Volume14
Issue number6
DOIs
Publication statusPublished - 2010 Jun

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry
  • Electrical and Electronic Engineering

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