化学
电化学
导电体
电解质
快离子导体
阴极
电池(电)
锂(药物)
纳米技术
有机自由基电池
离子电导率
化学工程
电极
材料科学
物理化学
复合材料
热力学
功率(物理)
医学
物理
工程类
内分泌学
作者
Xiaoxue Wang,De‐Hui Guan,Cheng‐Lin Miao,Dechen Kong,Zheng Luo,Ji‐Jing Xu
摘要
The demand for high-energy sustainable rechargeable batteries has motivated the development of lithium-oxygen (Li-O2) batteries. However, the inherent safety issues of liquid electrolytes and the sluggish reaction kinetics of existing cathodes remain fundamental challenges. Herein, we demonstrate a promising photo-assisted solid-state Li-O2 battery based on metal-organic framework-derived mixed ionic/electronic conductors, which simultaneously serve as the solid-state electrolytes (SSEs) and the cathode. The mixed conductors could effectively harvest ultraviolet-visible light to generate numerous photoelectrons and holes, which is favorable to participate in the electrochemical reaction, contributing to greatly improved reaction kinetics. According to the study on conduction behavior, we discover that the mixed conductors as SSEs possess outstanding Li+ conductivity (1.52 × 10-4 S cm-1 at 25 °C) and superior chemical/electrochemical stability (especially toward H2O, O2-, etc.). Application of mixed ionic electronic conductors in photo-assisted solid-state Li-O2 batteries further reveals that a high energy efficiency (94.2%) and a long life (320 cycles) can be achieved with a simultaneous design of SSEs and cathodes. The achievements present the widespread universality in accelerating the development of safe and high-performance solid-state batteries.
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