A hydro-stable and phase-transition-free P2-type cathode with superior cycling stability for high-voltage sodium-ion batteries
學年 113
學期 1
出版（發表）日期 2025-01-15
作品名稱 A hydro-stable and phase-transition-free P2-type cathode with superior cycling stability for high-voltage sodium-ion batteries
作品名稱（其他語言）
著者 Jun Xiao; Hong Gao; Yang Xiao; Shijian Wang; Cheng Gong; Zefu Huang; Bing Sun; Chung-Li Dong; Xin Guo; Hao Liu; Guoxiu Wang
單位
出版者
著錄名稱、卷期、頁數 Chemical Engineering Journal 506, 160010
摘要 A dual-site substitution strategy was applied to enhance the electrochemical performance of sodium-ion batteries, leading to the development of the Na0.80Mg0.03Li0.18Mn0.67Cu0.15O2 cathode material. By introducing Mg and Cu ions at multiple sites, the local chemical environment was optimized, resulting in improved ion diffusion kinetics and charge transfer dynamics, which accelerate the overall electrochemical reactions. Mg ions substituted at Na sites act as “pillars” effectively mitigating detrimental O2−–O2− electrostatic repulsion and enabling stable anion redox activity. This novel cathode demonstrates a high specific capacity of 162 mAh/g, excellent rate capability with 114 mAh/g at 1000 mA g−1 (8C), and superior cycling stability with 80.3 % capacity retention after 300 cycles. Furthermore, the dual-site substitution minimizes volume variation to just 1.3 % during electrochemical processes and significantly enhances moisture resistance, offering promising potential for practical sodium-ion battery applications.
關鍵字 Cathode materials; Sodium ion batteries; Layered oxide; Dual-site modulation
語言 en
ISSN 1385-8947; 1873-3212
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/129523 )