State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Adv Mater. 2017 Jun;29(24). doi: 10.1002/adma.201606552. Epub 2017 Apr 21.
To achieve a high reversibility and long cycle life for Li-O battery system, the stable tissue-directed/reinforced bifunctional separator/protection film (TBF) is in situ fabricated on the surface of metallic lithium anode. It is shown that a Li-O cell composed of the TBF-modified lithium anodes exhibits an excellent anodic reversibility (300 cycles) and effectively improved cathodic long lifetime (106 cycles). The improvement is attributed to the ability of the TBF, which has chemical, electrochemical, and mechanical stability, to effectively prevent direct contact between the surface of the lithium anode and the highly reactive reduced oxygen species (Li O or its intermediate LiO ) in cell. It is believed that the protection strategy describes here can be easily extended to other next-generation high energy density batteries using metal as anode including Li-S and Na-O batteries.
为了实现锂氧电池体系的高可逆性和长循环寿命，在金属锂负极表面原位构建了稳定的组织导向/增强型双功能隔膜/保护层（TBF）。结果表明，由 TBF 改性锂负极组成的锂氧电池具有优异的阳极可逆性（300 次循环）和有效改善的阴极长寿命（106 次循环）。这种改善归因于 TBF 的能力，它具有化学、电化学和机械稳定性，能够有效地防止锂阳极表面与电池中高反应性还原氧物种（LiO 或其中间态 LiO ）直接接触。相信这里描述的保护策略可以很容易地扩展到其他使用金属作为负极的下一代高能量密度电池，包括锂硫电池和钠氧电池。
