Energy & Environmental Materials | |
Critical Factors Dictating Reversibility of the Zinc Metal Anode | |
article | |
Lin Ma1  Marshall A. Schroeder1  Travis P. Pollard1  Oleg Borodin1  Michael S. Ding1  Ruimin Sun2  Longsheng Cao2  Janet Ho1  David R. Baker1  Chunsheng Wang2  Kang Xu1  | |
[1] Energy & Biotechnology Division, US Army Research Laboratory;Department of Chemical and Biomolecular Engineering, University of Maryland, College Park | |
关键词: Education; Risk Factor; Prevalence; Burden; Asthma; Control; Severity"/>; | |
DOI : 10.1002/eem2.12077 | |
来源: Wiley | |
【 摘 要 】
With high energy density and improved safety, rechargeable battery chemistries with a zinc (Zn) metal anode offer promising and sustainable alternatives to those based on lithium metal or lithium-ion intercalation/alloying anode materials; however, the poor electrochemical reversibility of Zn plating/stripping, induced by parasitic reactions with both aqueous and non-aqueous electrolytes, presently limits the practical appeal of these systems. Although recent efforts in rechargeable Zn metal batteries (RZMBs) have achieved certain advancements in Zn metal reversibility, as quantified by the Coulombic efficiency (CE), a standard protocol for CE has not been established, and results across chemistries and systems are often conflicting. More importantly, there is still an insufficient understanding regarding the critical factors dictating Zn reversibility. In this work, a rigorous, established protocol for determining CE of lithium metal anodes is transplanted to the Zn chemistry and is used for systematically examining how a series of factors including current collector chemistry, current density, temperature, and the upper voltage limit during stripping affect the measured reversibility of different Zn electrolytes. With support from density functional theory calculations, this standardized Zn CE protocol is then leveraged to identify an important correlation between electrolyte solvation strength toward Zn 2+ and the measured Zn CE in the corresponding electrolyte, providing new guidance for future development and evaluation of Zn electrolytes.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO202107100001397ZK.pdf | 1355KB | download |