Revisiting Surface Modification of Graphite: Dual-Layer Coating for High-Performance Lithium Battery Anode Materials

Gyujin Song, Jaegeon Ryu, Seunghee Ko, Byoung Man Bang, Sinho Choi, Myoungsoo Shin, Sang Young Lee, Soojin Park

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Surface modification of electrode active materials has garnered considerable attention as a facile way to meet stringent requirements of advanced lithium-ion batteries. Here, we demonstrated a new coating strategy based on dual layers comprising antimony-doped tin oxide (ATO) nanoparticles and carbon. The ATO nanoparticles are synthesized via a hydrothermal method and act as electronically conductive/electrochemically active materials. The as-synthesized ATO nanoparticles are introduced on natural graphite along with citric acid used as a carbon precursor. After carbonization, the carbon/ATO-decorated natural graphite (c/ATO-NG) is produced. In the (carbon/ATO) dual-layer coating, the ATO nanoparticles coupled with the carbon layer exhibit unprecedented synergistic effects. The resultant c/ATO-NG anode materials display significant improvements in capacity (530 mA h g−1), cycling retention (capacity retention of 98.1 % after 50 cycles at a rate of C/5), and low electrode swelling (volume expansion of 38 % after 100 cycles) which outperform that of typical graphite materials. Furthermore, a full-cell consisting of a c/ATO-NG anode and an LiNi0.5Mn1.5O4 cathode presents excellent cycle retention (capacity retention of >80 % after 100 cycles). We envision that the dual-layer coating concept proposed herein opens a new route toward high-performance anode materials for lithium-ion batteries.

Original languageEnglish
Pages (from-to)1711-1717
Number of pages7
JournalChemistry - An Asian Journal
Volume11
Issue number11
DOIs
Publication statusPublished - 2016 Jun 6

Bibliographical note

Funding Information:
This work was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT and future Planning (2015R1A2A2A01003143, 2015R1A2A1A01003474) and the 2015 Research Fund (1.150120.01) of UNIST.

Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry

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