氯化物水溶液电解液可充锌-空气电池的研究
Towards Rechargeable Zinc-Air Batteries with Aqueous Chloride Electrolytes
摘要：
本文介绍了一种结合理论和实验研究的近中性水溶液电解质的氯化物盐为基础的可充电锌空气电池（ZABs）。近中性氯化物电解质在空气中的弹性可以延长ZAB的寿命，但基于理论的模拟预测，这种电解质容易受到其他挑战，包括pH值不稳定和混合氢氧化锌氯化物产物的不必要沉淀。在这项工作中，我们结合了基于理论的模拟与实验方法，如全电池循环，operando pH测量，非原位XRD，SEM和EDS表征，以研究ZABs与水性氯化物电解质的性能。近中性ZAB电池的实验表征观察到预测的pH不稳定性，并确认了最终放电产物的组成。提出了促进更大的pH稳定性和控制排放产物沉淀的步骤。
英文摘要：
This paper presents a combined theoretical and experimental investigation of aqueous near-neutral electrolytes based on chloride salts for rechargeable zinc-air batteries (ZABs). The resilience of near-neutral chloride electrolytes in air could extend ZAB lifetime, but theory-based simulations predict that such electrolytes are vulnerable to other challenges including pH instability and the unwanted precipitation of mixed zinc hydroxide chloride products. In this work, we combine theory-based simulations with experimental methods such as full cell cycling, operando pH measurements, ex-situ XRD, SEM, and EDS characterization to investigate the performance of ZABs with aqueous chloride electrolytes. The experimental characterization of near-neutral ZAB cells observes the predicted pH instability and confirms the composition of the final discharge products. Steps to promote greater pH stability and control the precipitation of discharge products are proposed.
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