Lei Jiang, Gao Zongyan, Tang Linbin, Zhong Li, Li Junjian, Zhang Yue, Liu Tao
Shanghai Key Laboratory of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, No. 1239, Siping Road, Shanghai, 200092, P. R. China.
SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China.
Adv Sci (Weinh). 2022 Feb;9(4):e2103760. doi: 10.1002/advs.202103760. Epub 2021 Dec 11.
Realizing an energy-dense, highly rechargeable nonaqueous lithium-oxygen battery in ambient air remains a big challenge because the active materials of the typical high-capacity cathode (Li O ) and anode (Li metal) are unstable in air. Herein, a novel lithium-oxygen full cell coupling a lithium anode protected by a composite layer of polyethylene oxide (PEO)/lithium aluminum titanium phosphate (LATP)/wax to a LiOH-based cathode is constructed. The protected lithium is stable in air and water, and permits reversible, dendrite-free lithium stripping/plating in a wet nonaqueous electrolyte under ambient air. The LiOH-based full cell reaction is immune to moisture (up to 99% humidity) in air and exhibits a much better resistance to CO contamination than Li O , resulting in a more consistent electrochemistry in the long term. The current approach of coupling a protected lithium anode with a LiOH-based cathode holds promise for developing a long-life, high-energy lithium-air battery capable of operating in the ambient atmosphere.
在环境空气中实现能量密度高、可高度充电的非水锂氧电池仍然是一个巨大的挑战，因为典型的高容量阴极（Li₂O₂）和阳极（锂金属）的活性材料在空气中不稳定。在此，构建了一种新型锂氧全电池，该电池将由聚环氧乙烷（PEO）/锂铝钛磷酸盐（LATP）/蜡复合层保护的锂阳极与基于LiOH的阴极耦合。受保护的锂在空气和水中稳定，并允许在环境空气中的湿非水电解质中进行可逆的、无枝晶的锂剥离/电镀。基于LiOH的全电池反应对空气中的水分（湿度高达99%）免疫，并且比Li₂O₂对CO₂污染具有更好的抗性，从而在长期内表现出更稳定的电化学性能。目前将受保护的锂阳极与基于LiOH的阴极耦合的方法有望开发出一种能够在环境大气中运行的长寿命、高能量锂空气电池。
