Affiliation:
1. Institute for Sustainable Energy College of Sciences Shanghai University Shanghai 20044 China
2. College of Materials and Textile Engineering Jiaxing University Jiaxing 314001 China
3. College of Materials Science and Engineering National Engineering Research Center for Magnesium Alloys Chongqing University Chongqing 400044 China
Abstract
AbstractAqueous zinc‐ion batteries (AZIBs) have attracted considerable attention. However, due to the uneven distribution of charge density at Zn anode‐electrolyte interface, severe dendrites and corrosion are generated during cycling. In this work, a facile and scalable strategy to address the above‐mentioned issues has been proposed through regulating the charge density at Zn anode‐electrolyte interface. As a proof of concept, amidinothiourea (ATU) with abundant lone‐pair electrons is employed as an interfacial charge modifier for Zn anode‐electrolyte interface. The uniform and increased interfacial charge distribution on Zn anode‐electrolyte interface has been obtained. Moreover, the unique Zn‐bond constructed between N atoms and Zn2+ as well as the hydrogen bonds are formed among ATU and Ac− anion/active H2O, which promote the migration and desolvation behavior of Zn2+ at anode‐electrolyte interface. Accordingly, at a trace concentration of 0.01 mg mL−1 ATU, these features endow Zn anode with a long cycling life (more than 800 h), and a high average Columbic efficiency (99.52 %) for Zn||Cu batteries. When pairing with I2 cathode, the improved cycling ability (5000 cycles) with capacity retention of 77.9 % is achieved. The fundamental understanding on the regulation of charge density at anode‐electrolyte interface can facilitate the development of AZIBs.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shanghai Municipality
Subject
General Chemistry,Catalysis,Organic Chemistry
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献