降级(电信)
电解质
材料科学
阴极
锂(药物)
电池(电)
化学工程
离子
亚硫酸盐
纳米技术
电极
化学
无机化学
计算机科学
有机化学
工程类
内分泌学
物理
物理化学
功率(物理)
电信
医学
量子力学
作者
Shuo Sun,Chen‐Zi Zhao,Hong Yuan,Zhongheng Fu,Xiang Chen,Yang Lu,Yun-Fan Li,Jie Hu,Juncai Dong,Jia‐Qi Huang,Minggao Ouyang,Qiang Zhang
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2022-11-23
卷期号:8 (47)
被引量:55
标识
DOI:10.1126/sciadv.add5189
摘要
In the pursuit of energy-dense all-solid-state lithium batteries (ASSBs), Li-rich Mn-based oxide (LRMO) cathodes provide an exciting path forward with unexpectedly high capacity, low cost, and excellent processibility. However, the cause for LRMO|solid electrolyte interfacial degradation remains a mystery, hindering the application of LRMO-based ASSBs. Here, we first reveal that the surface oxygen instability of LRMO is the driving force for interfacial degradation, which severely blocks the interfacial Li-ion transport and triggers fast battery failure. By replacing the charge compensation of surface oxygen with sulfite, the overoxidation and interfacial degradation can be effectively prevented, therefore achieving a high specific capacity (~248 mAh g −1 , 1.1 mAh cm −2 ; ~225 mAh g −1 , 2.9 mAh cm −2 ) and excellent long-term cycling stability of >300 cycles with 81.2% capacity retention at room temperature. These findings emphasize the importance of irreversible anion reactions in interfacial failure and provide fresh insights into constructing stable interfaces in LRMO-based ASSBs.
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