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Gamma-ray irradiated graphene nanosheets/polydopamine hybrids as a superior anode material for lithium-ion batteries

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2022, 32(1), pp.305-312
  • DOI : 10.1007/s42823-021-00308-4
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : July 15, 2021
  • Accepted : November 15, 2021
  • Published : January 1, 2022

Jo Kyoung-Il 1 Kim Hyeri 2 Jeong Hee-Sung 2 KEE JIN HO 3 Oh Seung-Hwan 2 Song Seok Hyun 4 Kim Hyungsub 5 Koo Jaseung 2

1한국원자력연구원
2충남대학교 유기재료공학과
3충남대학교
4고려대학교 화학생물공학과
5한국원자력연구원 중성자과학부

Accredited

ABSTRACT

Despite having a low electrical conductivity, graphene oxide (GO) is used as an anode material in lithium-ion batteries (LIBs) owing its good processability in large quantities. GO is reduced by chemical or thermal treatments to enhance its electrical conductivity. In this study, high-performance GO anodes with polydopamine (PDA) and polyethylenimine (PEI) as binders were fabricated. Gamma (γ)-ray irradiation was applied to the GO–PDA–PEI hybrid sheets to covalently cross-link the GO sheets and binders with an amide bond. The covalent crosslinking was confirmed by Fourier-transform infrared spectroscopy analysis. Further, X-ray photoelectron spectroscopy results showed that γ-ray irradiation produced a reduced GO sheet, which resulted in an increase in the electrical conductivity by 30%. By characterizing the electrochemical properties, we found that the γ-ray irradiation facilitates the stability and increases the charge/discharge capacity by crosslinking GO and PDA–PEI binders and reducing the GO sheets.

Citation status

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Total Citation Counts(KCI+WOS) (6) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (6) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-10-01)

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This paper was written with support from the National Research Foundation of Korea.