InBr3 as a self-defensed redox mediator for Li-O2 batteries: In situ construction of a stable indium-rich composite protective layer on the Li anode
InBr3 as a self-defensed redox mediator for Li-O2 batteries: In situ construction of a stable indium-rich composite protective layer on the Li anode
复制标题
InBr3作为Li-O-2电池的自防御氧化还原介体：在Li阳极上原位构建稳定的富铟复合保护层
DOI：
10.1016/j.jpowsour.2019.227095
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发表时间：
2019-11-01
影响因子：
9.2
通讯作者：
Sun, Guiru
中科院分区：
文献类型：
--
作者：
Liu, Jia;Wu, Tong;Sun, Guiru
基于氧化还原介体（RM）的Li-O-2系统的一个大障碍是可扩散的RM+和Li阳极之间的氧化还原穿梭，导致不可预期的RM降解和Li阳极的持续劣化，这不可避免地导致Li-O-2电池的低能量效率和差的循环稳定性。本文首次将InBr 3作为一种自我保护的RM引入到Li-O-2电池中，可以降低电池的过电位，从而改善电池的循环性能。此外，由于In 3+的存在，可在Li阳极上原位生成富In的复合保护层，有助于抑制氧化还原穿梭，提高Li与电解液的界面稳定性，抑制枝晶的形成。本工作为发展自我防护的RM和保护Li阳极的Li-O-2电池提供了一个见解。
One big obstacle for a redox mediator (RM)-based Li-O-2 system is the redox shuttling between the diffusible RM+ and Li anode, leading to the unexpected RM degradation and continuous deterioration of Li anode, which Inevitably results in a low energy efficiency and a poor cycling stability for the Li-O-2 battery. Here, InBr3 as a self-defensed RM is firstly introduced into Li-O-2 batteries, which can lower the cell overpotential and thus improve the cycling performance. Moreover, due to the In3+ existence, an In-rich composite protective layer can be in situ generated on the Li anode, which contributes to suppressing the redox shuttling, improving the interface stability of Li and electrolyte, and inhibiting the dendrite formation. This work gives an insight into the development of self-defensed RM and the protection of the Li anode for Li-O-2 batteries.