Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Composited Conductive Materials for Enhancing the Ultrafast Performance for Anode in Lithium-Ion Battery

리튬이온전지 음극의 고속 성능 향상을 위한 도전재 복합화

  • Ki-Wook, Sung (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Hyo-Jin, Ahn (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 성기욱 (서울과학기술대학교 신소재공학과) ;
  • 안효진 (서울과학기술대학교 신소재공학과)
  • Received : 2022.09.19
  • Accepted : 2022.10.17
  • Published : 2022.11.27
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Abstract

Lithium-ion batteries (LIBs) are powerful energy storage devices with several advantages, including high energy density, large voltage window, high cycling stability, and eco-friendliness. However, demand for ultrafast charge/discharge performance is increasing, and many improvements are needed in the electrode which contains the carbon-based active material. Among LIB electrode components, the conductive additive plays an important role, connecting the active materials and enhancing charge transfer within the electrode. This impacts electrical and ionic conductivity, electrical resistance, and the density of the electrode. Therefore, to increase ultrafast cycling performance by enhancing the electrical conductivity and density of the electrode, we complexed Ketjen black and graphene and applied conductive agents. This electrode, with the composite conductive additives, exhibited high electrical conductivity (12.11 S/cm), excellent high-rate performance (28.6 mAh/g at current density of 3,000 mA/g), and great long-term cycling stability at high current density (88.7 % after 500 cycles at current density of 3,000 mA/g). This excellent high-rate performance with cycling stability is attributed to the increased electrical conductivity, due to the increased amount of graphene, which has high intrinsic electrical conductivity, and the high density of the electrode.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1 A2 C1005836) and the Technology Innovation Program (10080656, Development of ceramic/ carbon convergence and integration anode material for 10C fast charging Lithium ion battery) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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