A Dual‐Functional Organic Electrolyte Additive with Regulating Suitable Overpotential for Building Highly Reversible Aqueous Zinc Ion Batteries

Author:

Liu Zixiang1,Wang Rui1,Ma Quanwei1,Wan Jiandong1,Zhang Shilin2,Zhang Longhai1,Li Hongbao1,Luo Qiquan1,Wu Jiang3,Zhou Tengfei1,Mao Jianfeng2,Zhang Lin4,Zhang Chaofeng1ORCID,Guo Zaiping2

Affiliation:

1. Institutes of Physical Science and Information Technology Leibniz Joint Research Center of Materials Sciences Engineering Laboratory of High‐Performance Waterborne Polymer Materials of Anhui Province Anhui Graphene Engineering Laboratory Key Laboratory of Structure and Functional Regulation of Hybrid Material (Ministry of Education) Anhui University Hefei 230601 China

2. School of Chemical Engineering & Advanced Materials The University of Adelaide Adelaide 5005 Australia

3. Key Laboratory for Tibet Plateau Phytochemistry of Qinghai Province College of Pharmacy Qinghai Nationalities University Xining 810007 P. R. China

4. Institute for Solid State Physics Laboratory of Nano and Quantum Engineering (LNQE) Leibniz University Hannover Appelstrasse 2 30167 Hannover Germany

Abstract

AbstractAqueous zinc ion batteries (AZIBs) with high safety, low cost, and eco‐friendliness advantages show great potential in large‐scale energy storage systems. However, their practical application is hindered by low Columbic efficiency and unstable zinc anode resulting from the side reactions and deterioration of zinc dendrites. Herein, tripropylene glycol (TG) is chosen as a dual‐functional organic electrolyte additive to improve the reversibility of AZIBs significantly. Importantly, ab initio molecular dynamics theoretical simulations and experiments such as in situ electrochemical impedance spectroscopy, and synchrotron radiation‐based in situ Fourier transform infrared spectroscopy confirm that TG participates in the solvation sheath of Zn2+, regulating overpotential and inhibiting side reactions; meanwhile, TG inhibits the deterioration of dendrites and modifies the direction of zinc deposition by constructing an adsorbed layer on the zinc anode. Consequently, a Zn‐MnO2 full cell with TG electrolyte exhibited a specific capacity of 124.48 mAh g‐1 after 1000 cycles at a current density of 4 A g‐1. This quantitative regulation for suitable solvation sheath and adsorbed layer on zinc anode, and its easy scalability of the process can be of immediate benefit for the dendrite‐free, high‐performance, and low‐cost energy storage systems.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Anhui Province

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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