Aqueous rechargeable Li/Na-ion batteries have shown promise for sustainable large-scale energy storage due to their safety, low cost, and environmental benignity. However, practical applications of aqueous batteries are plagued by water's intrinsically narrow electrochemical stability window, which results in low energy density. In this perspective article, we review several strategies to broaden the electrochemical window of aqueous electrolytes and realize high-energy aqueous batteries. Specifically, we highlight our recent findings on stabilizing aqueous Li storage electrochemistry using a deuterium dioxide-based aqueous electrolyte, which shows significant hydrogen isotope effects that trigger a wider electrochemical window and inhibit detrimental parasitic processes.

由于其安全性、低成本和环境友好性，水系可充电锂/钠离子电池已显示出可持续大规模储能的前景。然而，水系电池的实际应用受到水固有的窄电化学稳定窗口的困扰，这导致能量密度低。在这篇有前景的文章中，我们回顾了几种拓宽水系电解质电化学窗口和实现高能水系电池的策略。具体来说，我们重点介绍了我们最近关于使用基于二氧化氘的水性电解质稳定水性锂存储电化学的发现，该发现显示出显着的氢同位素效应，可触发更宽的电化学窗口并抑制有害的寄生过程。