Insight of Redox Shuttling Inhibition for a Polyethylene Oxide/TiO2/Polypropylene Separator of Li-O-2 Battery with Enhanced Cycling Stability
Insight of Redox Shuttling Inhibition for a Polyethylene Oxide/TiO2/Polypropylene Separator of Li-O-2 Battery with Enhanced Cycling Stability
复制标题
增强循环稳定性的 Li-O-2 电池聚环氧乙烷/TiO2/聚丙烯隔膜氧化还原穿梭抑制的见解
DOI：
10.1021/acsaem.0c01894
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发表时间：
2020
影响因子：
6.4
通讯作者：
Xie Haiming
中科院分区：
文献类型：
--
作者：
Liu Jia;Wang Ying;Zhou Dan;Li Dan;Kang Ziye;Xie Haiming
虽然氧化还原介体（RM）策略可以降低Li-O2电池（LOB）的过电位，但氧化还原穿梭导致不期望的RM消耗和锂金属阳极的持续分解，从而导致差的循环稳定性。在这项工作中，混合无机-有机复合材料的隔膜基于聚氧化乙烯/TiO 2/聚丙烯（PEO/TiO 2/PE）的LOBs，其目的是抑制RM穿梭已被首次报道。系统研究了纳米TiO 2和PEO对电池性能的影响。受益于协同优势，具有PEO/TiO 2/PE隔膜的LOB显示稳定的可循环性、可观的速率性能和良好的可逆性。此外，还提出了该复合隔板抑制梭动效应的机理。我们希望这项工作可以为LOB中Li阳极保护的多功能隔膜的开发提供见解。
Although a redox mediator (RM) strategy can lower the overpotential of Li–O2batteries (LOBs), the redox shuttling results in an undesired RM consumption and a continued decomposition of lithium metal anode, leading to a poor cycling stability. In this work, a hybrid inorganic–organic composite separator based on polyethylene oxide/TiO2/polypropylene (PEO/TiO2/PE) in LOBs has been reported for the first time, which aims to suppress the RM shuttling. The influences of TiO2nanoparticles and PEO on battery performance are systematically investigated. Benefiting from the synergistic advantages, a LOB with PEO/TiO2/PE separator displays stable cyclability, considerable rate performance, and good reversibility. Additionally, the mechanism of inhibiting shuttling effect by this composite separator is proposed. We hope that this work can give an insight into the development of multiple functional separators for Li anode protection in LOBs.