Jinlong Zhang , Qing Wu , Song Yang , Fusheng Luo , Yue Li , Yanhui Zhang , Kui Chen , Jun Huang , Haibo Xie , Yiwang Chen
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引用次数: 0
Abstract
A highly reversible Zn metal anode is the prerequisite for realizing the practical applications of aqueous Zn ion batteries (ZIBs), which are limited by severe zinc dendrites and corrosion. Herein, bio-inspired hydroxyl-rich l-ascorbic acid (vitamin C, l-Aa) was employed to regulate coordination chemistry via the strong interaction between –OH and H2O with dual remodeling functions and further improve the reversibility of Zn anodes. Specifically, l-Aa not only reconstructs the Zn2+ solvation shell, thus reducing Zn2+ desolvation energy, but also forms a molecular adsorption interface via excellent zincophilicity to improve zinc redox kinetics and suppress Zn anode corrosion. Meanwhile, the molecular adsorption interface facilitates the homogenization of the interfacial electric field, thereby promoting the predominant deposition of Zn(002). Consequently, the Zn//Cu asymmetric cell presents a low overpotential for zinc nucleation and exceptional average coulombic efficiency (CE) of 99.6% over 1200 cycles at a high current density of 20 mA cm−2. The Zn//Zn cell also delivers excellent cycling stability for over 1400 h at 5 mA cm−2. In addition, the Zn//MnO2 full cell exhibits a robust long-term cycling performance of 1000 cycles at 1 A g−1. This strategy of simultaneously regulating coordination chemistry and further constructing molecular interfaces may boost the applications of highly reversible ZIBs.
期刊介绍:
Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.