Unveiling the Evolution of LiCoO2 beyond 4.6 V
學年 112
學期 1
出版（發表）日期 2023-10-23
作品名稱 Unveiling the Evolution of LiCoO2 beyond 4.6 V
作品名稱（其他語言）
著者 Zixin Wu, Guifan Zeng, Jianhua Yin, Chao-Lung Chiang, Qinghua Zhang, Baodan Zhang, Jianken Chen, Yawen Yan, Yonglin Tang, Haitang Zhang, Shiyuan Zhou, Qingsong Wang, Xiaoxiao Kuai, Yan-Gu Lin, Lin Gu, Yu Qiao, Shi-Gang Sun
單位
出版者
著錄名稱、卷期、頁數 ACS Energy Letters, 8(11), 4806-4817
摘要 The working mechanism of LiCoO2 beyond 4.6 V presents complicated issues: (1) the ambiguous multistructural evolutions, (2) the vague O-related anionic redox reactions (ARR) triggered by the overlap Co–O bands, and (3) the serious electrode–electrolyte interface stability challenges. The intricate relationship among them turns into a classic “chicken and egg” conundrum, leading to a confusing evolution process of LiCoO2. Herein, from an ingenious perspective combining stacking faults and nonhomogeneous delithiation, we originally demonstrate a series of intergrowth phase evolutions from O3 to O1, passing through the so-called H1-3 phase. Moreover, in sharp contrast to the O–O dimer formed in a traditional Li-rich layered cathode, a moderate and stable arrangement of oxidized lattice oxygen is unveiled as a manifestation of ARR in LiCoO2. Additionally, we clarify the nature that dehydrogenation and hydrolysis of electrolyte trigger the chain decompositions and intensify the surface degradation.
關鍵字 Chemical structure, Electrodes, Electrolytes, Oxygen, Phase transitions
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI SSCI Scopus
產學合作
通訊作者 Xiaoxiao Kuai, Yan-Gu Lin, Lin Gu, Yu Qiao
審稿制度 否
國別 USA
公開徵稿
出版型式 ,電子版
SDGS 永續城市與社區,負責任的消費與生產,產業創新與基礎設施