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Relaxation of Stress Propagation in Alloying-Type Sn Anodes for K-Ion Batteries.
Kang, Hyokyeong; Kang, Hyuk; Piao, Junji; Xu, Xieyu; Liu, Yangyang; Xiong, Shizhao; Lee, Seunggyeong; Kim, Hun; Jung, Hun-Gi; Kim, Jaekook; Sun, Yang-Kook; Hwang, Jang-Yeon.
Affiliation
  • Kang H; Department of Energy Engineering, Hanyang University, 04763, Seoul, Republic of Korea.
  • Kang H; Department of Materials Science and Engineering, Chonnam National University, 61186, Gwangju, Republic of Korea.
  • Piao J; Department of Materials Science and Engineering, Chonnam National University, 61186, Gwangju, Republic of Korea.
  • Xu X; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China.
  • Liu Y; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China.
  • Xiong S; Department of Physics, Chalmers University of Technology, SE 412 96, Göteborg, Sweden.
  • Lee S; Department of Materials Science and Engineering, Chonnam National University, 61186, Gwangju, Republic of Korea.
  • Kim H; Department of Energy Engineering, Hanyang University, 04763, Seoul, Republic of Korea.
  • Jung HG; Energy Storage Research Center, Clean Energy Research Division, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
  • Kim J; Department of Energy Science, Sungkyunkwan University, 16419, Suwon, Republic of Korea.
  • Sun YK; KIST-SKKU Carbon-Neutral Research Center, Sungkyunkwan University, 16419, Suwon, Republic of Korea.
  • Hwang JY; Department of Materials Science and Engineering, Chonnam National University, 61186, Gwangju, Republic of Korea.
Small Methods ; 8(1): e2301158, 2024 Jan.
Article in En | MEDLINE | ID: mdl-37821419
ABSTRACT
Alloying-type metallic tin is perceived as a potential anode material for K-ion batteries owing to its high theoretical capacity and reasonable working potential. However, pure Sn still face intractable issues of inferior K+ storage capability owing to the mechanical degradation of electrode against large volume changes and formation of intermediary insulating phases K4 Sn9 and KSn during alloying reaction. Herein, the TiC/C-carbon nanotubes (CNTs) is prepared as an effective buffer matrix and composited with Sn particles (Sn-TiC/C-CNTs) through the high-energy ball-milling method. Owing to the conductive and rigid properties, the TiC/C-CNTs matrix enhances the electrical conductivity as well as mechanical integrity of Sn in the composite material and thus ultimately contributes to performance supremacy in terms of electrochemical K+ storage properties. During potassiation process, the TiC/C-CNTs matrix not only dissipates the internal stress toward random radial orientations within the Sn particle but also provides electrical pathways for the intermediate insulating phases; this tends to reduce microcracking and prevent considerable electrode degradation.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Small Methods Year: 2024 Type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Small Methods Year: 2024 Type: Article