Issues and rational design of aqueous electrolyte for Zn‐ion batteries
Qi Zhang,
Zefang Yang,
Huimin Ji,
Xiaohui Zeng,
Yougen Tang,
Dan Sun,
Haiyan Wang
Affiliations
Qi Zhang
Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University Changsha P. R. China
Zefang Yang
Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University Changsha P. R. China
Huimin Ji
Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University Changsha P. R. China
Xiaohui Zeng
Institute for Superconducting and Electronic Materials (ISEM) Australian Institute for Innovative Materials (AIIM) University of Wollongong Wollongong New South Wales Australia
Yougen Tang
Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University Changsha P. R. China
Dan Sun
Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University Changsha P. R. China
Haiyan Wang
Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University Changsha P. R. China
Abstract Aqueous Zn‐ion batteries (AZIBs) are regarded as a promising alternative to the widely used lithium‐ion batteries in large‐scale energy storage systems. The researches on the development of novel aqueous electrolyte to improve battery performance have also attracted great interest since the electrolyte is a key component for Zn2+ migration between cathode and anode. Herein, we briefly summarized and illuminated the recent development tendency of aqueous electrolyte for AZIBs, then deeply analyzed its existing issues (water decomposition, cathode dissolution, corrosion and passivation, and dendrite growth) and discussed the corresponding optimization strategies (pH regulation, concentrated salt solution, electrolyte composition design, and functional additives). The internal mechanisms of these strategies were further revealed and the relationships between issues and solutions were clarified, which could guide the future development of aqueous electrolytes for AZIBs.
