期刊論文
| 學年 | 114 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2025-11-13 |
| 作品名稱 | Visualization of Thermal‐Induced Degradation Pathways of High‐Ni Cathode: A Comparative Study in Solid Chloride and Liquid Electrolytes |
| 作品名稱（其他語言） | |
| 著者 | Gang Sun; Hsiao-Tsu Wang; Chi-Fang Lee; Qingjun Zhu; Lijun Gao; Shang-Hsien Hsieh; Yu-Cheng Shao; Hirofumi Ishii; Jigang Zhou; Jian Wang; Zhenbo Wang |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Advanced Materials 37(45), e10392 |
| 摘要 | Nickel-rich-layered oxide cathodes are promising candidates for enhancing the energy density of lithium-ion batteries. Higher energy density leads to severe oxygen release, poor thermal stability, and safety risks, as exothermic side reactions induce complex structural and chemical transformations at elevated temperatures. Herein, in-situ heating scanning transmission X-ray microscopy (STXM)-ptychography to directly investigate the thermal degradation pathways of charged LiNi0.8Co0.1Mn0.1O2 in both solid chloride and liquid electrolytes is employed. A key finding is the opposite spatial degradation behavior: in solid electrolytes, oxygen loss and Ni reduction occur from the core to surface, while in liquid electrolytes, the degradation proceeds from surface to core. These observations are closely linked to the local structural disorder around Ni atoms, as oxygen loss directly weakens the Ni─O bonding environment, promoting the reduction of Ni and accelerating lattice instability at high temperatures. Additionally, the extent of degradation is found to correlate with particle size, with solid electrolytes effectively stabilizing smaller particles. These results reveal strong spatial heterogeneity in thermal degradation and highlight the critical role of electrolyte chemistry in dictating thermal stability. Our study provides new insights into the structural and chemical evolution of Ni-rich cathodes under thermal stress, offering valuable guidance for the design of safer, high-performance lithium-ion batteries. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0935-9648; 1521-4095 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 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/987654321/129447 ) |