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Defect engineering unveiled: Enhancing potassium storage in expanded graphite anode.
Zhang, Kai-Yang; Liu, Han-Hao; Su, Meng-Yuan; Yang, Jia-Lin; Wang, Xiao-Tong; Huixiang Ang, Edison; Gu, Zhen-Yi; Zheng, Shuo-Hang; Heng, Yong-Li; Liang, Hao-Jie; Wang, Yinglin; Li, Shuying; Wu, Xing-Long.
Afiliación
  • Zhang KY; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Liu HH; Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China.
  • Su MY; Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China.
  • Yang JL; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Wang XT; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Huixiang Ang E; Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, 637616, Singapore.
  • Gu ZY; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Zheng SH; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Heng YL; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Liang HJ; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Wang Y; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China.
  • Li S; Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China. Electronic address: lisy878@nenu.edu.cn.
  • Wu XL; MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, Jilin 130024, China. Electronic address: xinglong@nenu.edu.cn.
J Colloid Interface Sci ; 664: 607-616, 2024 Jun 15.
Article en En | MEDLINE | ID: mdl-38490036
ABSTRACT
Expanded graphite (EG) stands out as a promising material for the negative electrode in potassium-ion batteries. However, its full potential is hindered by the limited diffusion pathway and storage sites for potassium ions, restricting the improvement of its electrochemical performance. To overcome this challenge, defect engineering emerges as a highly effective strategy to enhance the adsorption and reaction kinetics of potassium ions on electrode materials. This study delves into the specific effectiveness of defects in facilitating potassium storage, exploring the impact of defect-rich structures on dynamic processes. Employing ball milling, we introduce surface defects in EG, uncovering unique effects on its electrochemical behavior. These defects exhibit a remarkable ability to adsorb a significant quantity of potassium ions, facilitating the subsequent intercalation of potassium ions into the graphite structure. Consequently, this process leads to a higher potassium voltage. Furthermore, the generation of a diluted stage compound is more pronounced under high voltage conditions, promoting the progression of multiple stage reactions. Consequently, the EG sample post-ball milling demonstrates a notable capacity of 286.2 mAh g-1 at a current density of 25 mA g-1, showcasing an outstanding rate capability that surpasses that of pristine EG. This research not only highlights the efficacy of defect engineering in carbon materials but also provides unique insights into the specific manifestations of defects on dynamic processes, contributing to the advancement of potassium-ion battery technology.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos