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Electrode Protection in High-Efficiency Li–O2 Batteries
ACS Central Science ( IF 12.7 ) Pub Date : 2020-11-24 , DOI: 10.1021/acscentsci.0c01069 Gang Huang 1, 2 , Jin Wang 1 , Xinbo Zhang 1
ACS Central Science ( IF 12.7 ) Pub Date : 2020-11-24 , DOI: 10.1021/acscentsci.0c01069 Gang Huang 1, 2 , Jin Wang 1 , Xinbo Zhang 1
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The aprotic Li–O2 battery possessing the highest theoretical energy density, approaching that of gasoline, has been regarded as one of the most promising successors to Li-ion batteries. Before this kind of battery can become a viable technology, a series of critical issues need to be conquered, like low round-trip efficiency and short cycling lifetime, which are closely related to the continuous parasitic processes happening at the cathode and anode during cycling. With an aim to promote the practical application of Li–O2 batteries, great effort has been devoted to identify the reasons for oxygen and lithium electrodes degradation and provide guidelines to overcome them. Thus, the stability of cathode and anode has been improved a lot in the past decade, which in turn significantly boosts the electrochemical performances of Li–O2 batteries. Here, an overlook on the electrode protection in high-efficiency Li–O2 batteries is presented by providing first the challenges of electrodes facing and then the effectiveness of the existing approaches that have been proposed to alleviate these. Moreover, new battery systems and perspectives of the viable near-future strategies for rational configuration and balance of the electrodes are also pointed out. This Outlook deepens our understanding of the electrodes in Li–O2 batteries and offers opportunities for the realization of high performance and long-term durability of Li–O2 batteries.
中文翻译：
高效锂氧电池的电极保护
非质子Li-O 2电池具有最高的理论能量密度，接近汽油，被认为是最有前途的锂离子电池的继任者之一。在这种电池成为可行的技术之前，需要克服一系列关键问题，例如往返效率低和循环寿命短，这些问题与循环过程中阴极和阳极发生的连续寄生过程密切相关。为了促进Li-O 2电池的实际应用，人们致力于找出氧电极和锂电极退化的原因并提供克服这些问题的指南。因此，在过去的十年中，正极和负极的稳定性得到了很大的提高，这反过来又显着提高了Li-O 2电池的电化学性能。在这里，通过首先提供电极面临的挑战，然后介绍现有的缓解这些挑战的方法的有效性，提出了对高效 Li-O 2电池中电极保护的忽视。此外，还指出了新的电池系统以及合理配置和平衡电极的可行的近期策略的前景。本展望加深了我们对Li-O 2电池电极的理解，并为实现Li-O 2电池的高性能和长期耐用性提供了机会。
更新日期：2020-12-23
中文翻译：
高效锂氧电池的电极保护
非质子Li-O 2电池具有最高的理论能量密度，接近汽油，被认为是最有前途的锂离子电池的继任者之一。在这种电池成为可行的技术之前，需要克服一系列关键问题，例如往返效率低和循环寿命短，这些问题与循环过程中阴极和阳极发生的连续寄生过程密切相关。为了促进Li-O 2电池的实际应用，人们致力于找出氧电极和锂电极退化的原因并提供克服这些问题的指南。因此，在过去的十年中，正极和负极的稳定性得到了很大的提高，这反过来又显着提高了Li-O 2电池的电化学性能。在这里，通过首先提供电极面临的挑战，然后介绍现有的缓解这些挑战的方法的有效性，提出了对高效 Li-O 2电池中电极保护的忽视。此外，还指出了新的电池系统以及合理配置和平衡电极的可行的近期策略的前景。本展望加深了我们对Li-O 2电池电极的理解，并为实现Li-O 2电池的高性能和长期耐用性提供了机会。
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