Towards improving the performance of the negative Zn electrode in Zn-Ion batteries

提高锌离子电池负极锌电极的性能

• 批准号: 570794-2021
• 负责人: Kish, JosephJR
• 金额: $ 7.94万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=758219
• 关键词: Towards; improving; performance; negative; Zn

Rechargeable Zn-ion batteries are targeted for non-portable applications, such as grid-scale energy storage, and provide several advantages over the Li-ion batteries currently used for these applications, including safety due to the aqueous electrolytes employed, while relying on Zn that is inexpensive, non-toxic and mined/produced within Canada. Salient Energy's Zn-ion batteries consist of: (i) negative Zn electrode where direct plating and stripping of Zn occurs; (ii) near-neutral aqueous Zn sulphate electrolyte, complete with a separator; and (iii) positive electrolytic MnO2 electrode capable of reversibly intercalating divalent Zn cations. Having successfully addressed problematic preferential (dendritic) Zn growth during plating/stripping at the negative electrode, which serves to short-circuit the battery, Salient Energy now faces a new challenge with the negative Zn electrode: parasitic corrosion reactions (self-corrosion) that limit cycle life and produce hydrogen gas. The overarching research objective is to determine the cause of the parasitic self-corrosion that occurs during cycling of the battery at the negative Zn electrode. This will be achieved through the three research sub-objectives: (i) characterize the corrosion damage accumulation on negative electrodes removed from scaled-up batteries, (ii) determine the corrosion mechanism of Zn metal in near-neutral aqueous Zn sulphate electrolytes, and (iii) determine the galvanic corrosion susceptibility of the Zn-brass couple that is intrinsic to the laminated negative electrode assembly. The project will create new knowledge that is required for novel science-based corrosion control strategies to be identified and evaluated. The project will train one PDF for the two year Missions Grant project.

可充电ZN-ION电池针对不可存储的应用，例如网格尺度的储能，并提供了比当前用于这些应用的锂离子电池的几个优势，包括由于采用的水性电解质而导致的安全性，同时依靠Zn这是廉价，无毒的，并且在加拿大境内生产/开采/生产。显着的能量的Zn-ION电池由：（i）负Zn电极，其中直接镀金和剥离发生； （ii）近中性水溶液硫酸盐电解质，配有分离器； （iii）阳性电解MNO2电极，能够可逆地插入二价锌阳离子。成功解决了在负电极下电镀/剥离过程中成功解决有问题的优先（树突状）锌的增长，该电极可在电池中短路，显着的能量现在面临着负锌电极的新挑战：寄生腐蚀反应（自我腐蚀），该反应（自我腐蚀）限制循环寿命并产生氢气。总体研究目标是确定在负Zn电极下电池循环过程中发生的寄生自我腐蚀的原因。这将通过三个研究子目标来实现：（i）表征从缩放电池中去除的负电极上积累的腐蚀损伤，（ii）确定Zn金属在近乎中性水溶液中的腐蚀机制，以及（iii）确定Zn-Brass夫妇的电腐蚀易感性，该Zn-Brass夫妇固有地层压负电极组件。该项目将创建新知识，这是新颖的基于科学的腐蚀控制策略要识别和评估所必需的。该项目将培训一个PDF为两年任务赠款项目。