当前位置：
X-MOL 学术
›
Energy Environ. Sci.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Kinetic square scheme in oxygen-redox battery electrodes
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2022-05-18 , DOI: 10.1039/d1ee03503g Kosuke Kawai 1 , Xiang-Mei Shi 1 , Norio Takenaka 1, 2 , Jeonguk Jang 1 , Benoit Mortemard de Boisse 1 , Akihisa Tsuchimoto 1 , Daisuke Asakura 3 , Jun Kikkawa 4 , Masanobu Nakayama 2, 5 , Masashi Okubo 1, 2 , Atsuo Yamada 1, 2
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2022-05-18 , DOI: 10.1039/d1ee03503g Kosuke Kawai 1 , Xiang-Mei Shi 1 , Norio Takenaka 1, 2 , Jeonguk Jang 1 , Benoit Mortemard de Boisse 1 , Akihisa Tsuchimoto 1 , Daisuke Asakura 3 , Jun Kikkawa 4 , Masanobu Nakayama 2, 5 , Masashi Okubo 1, 2 , Atsuo Yamada 1, 2
Affiliation
|
Integrating an anionic-redox (or oxygen-redox) capacity with a conventional cationic-redox capacity is a promising strategy for large-capacity battery cathodes exceeding present technical limits. However, most oxygen-redox cathodes exhibit a large charge/discharge voltage hysteresis (>0.5 V), resulting in poor energy efficiency and impractical implementation. Here, we show that nonpolarizing O− ↔ O2− (4.4 V vs. Li/Li+) and polarizing O22− → O2− (3.3 V vs. Li/Li+) coexist and kinetically compete in O2-type Li1.12–yNi0.17Mn0.71O2. The oxygen-redox reaction is described as a square scheme, involving bond-forming 2O− → O22− and bond-cleaving O24− → 2O2− processes, where preventing the formation of O22− is essential to realize non-polarizing and energy-efficient oxygen-redox reactions.
更新日期：2022-05-18
京公网安备 11010802027423号