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Porous polyhedral carbon matrix for high-performance Li/Na/K-ion battery anodes

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(7), pp.2189~2198
  • DOI : 10.1007/s42823-023-00559-3
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : May 9, 2023
  • Accepted : June 14, 2023
  • Published : December 1, 2023

Ganesan Vinoth 1 Lee Young-Han 1 Jung Heechul 2 Park Cheol-Min 1

1School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk, 39177, Republic of Korea
2Department of Energy and Mineral Resources Engineering, Dong-A University, Saha-gu, Busan, 49315, Republic of Korea

Accredited

ABSTRACT

A carbon matrix for high-capacity Li/Na/K-alloy-based anode materials is required because it can effectively accommodate the variation in the volume of Li/Na/K-alloy-based anode materials during cycling. Herein, a nanostructured porous polyhedral carbon (PPC) was synthesized via a simple two-step method consisting of carbonization and selective acid etching, and their electrochemical Li/Na/K-ion storage performance was investigated. The highly uniform PPC, with an average particle size of 800 nm, possesses a porous structure and large specific surface area of 258.82 cm2 g–1. As anodes for Li/Na/K-ion batteries (LIBs/NIBs/KIBs), the PPC matrix exhibited large initial reversible capacity, fast rate capability (LIB: ~ 320 mAh g–1 at 3C; NIB: ~ 140 mAh g–1 at 2C; KIB: ~ 110 mAh g–1 at 2C), better cyclic performance (LIB: ~ 550 mAh g–1; NIB: ~ 210 mAh g–1; KIB: ~ 190 mAh g–1 at 0.2C over 100 cycles), high ionic diffusivity, and excellent structural robustness upon cycling, which demonstrates that the PPC matrix can be highly used as a carbon matrix for high-capacity alloy-based anode materials for LIBs/NIBs/KIBs.

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