The limited triple-phase boundaries (TPBs) in solid-state cathodes (SSCs) and high resistance imposed by solid electrolytes (SEs) make the achievement of high-performance all-solid-state lithium-oxygen (ASS Li-O2) batteries a challenge. Herein, an adjustable-porosity plastic crystal electrolyte (PCE) has been fabricated by employing a thermally induced phase separation (TIPS) technique to overcome the above tricky issues. The SSC produced through the in-situ introduction of the porous PCE on the surface of the active material, facilitates the simultaneous transfer of Li+/e−, as well as ensures fast flow of O2, forming continuous and abundant TPBs. The high Li+ conductivity, softness, and adhesion of the dense PCE significantly reduce the battery resistance to 115 Ω. As a result, the ASS Li-O2 battery based on this adjustable-porosity PCE exhibits superior performances with high specific capacity (5963 mAh g−1), good rate capability, and stable cycling life up to 130 cycles at 32 °C. This novel design and exciting results could open a new avenue for ASS Li-O2 batteries.
|Original language||English (US)|
|Number of pages||6|
|State||Published - Apr 14 2020|
Bibliographical noteKAUST Repository Item: Exported on 2021-02-17
Acknowledgements: This work was financially supported by the National Key R&D Program of China (2017YFA0206700), the National Natural Science Foundation of China (21725103 and 21905269), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA21010210), Jilin Province Science and Technology Development Plan Funding Project (20180101203JC), Jilin Province Capital Construction Funds Project (2020C026-1), Changchun Science and Technology Development Plan Funding Project (19SS010,
18DY012)and the K. C. Wong Education Foundation (GJTD-2018-09).