Constructing a Super-Saturated Electrolyte Front Surface for Stable Rechargeable Aqueous Zinc Batteries

Huijun Yang; Zhi Chang; Yu Qiao; Han Deng; Xiaowei Mu; Ping He; Haoshen Zhou

doi:10.1002/anie.202001844

Constructing a Super-Saturated Electrolyte Front Surface for Stable Rechargeable Aqueous Zinc Batteries

Angew Chem Int Ed Engl. 2020 Jun 8;59(24):9377-9381. doi: 10.1002/anie.202001844. Epub 2020 Apr 6.

Authors

Huijun Yang^{1

2}, Zhi Chang^{1

2}, Yu Qiao¹, Han Deng^{1

2}, Xiaowei Mu³, Ping He³, Haoshen Zhou^{1

3

2}

Affiliations

¹ Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, 305-8568, Japan.
² Graduate School of System and Information Engineering, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, 305-8573, Japan.
³ Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Micro-structures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.

PMID: 32202034
DOI: 10.1002/anie.202001844

Abstract

Rechargeable aqueous zinc batteries (RAZB) have been re-evaluated because of the superiority in addressing safety and cost concerns. Nonetheless, the limited lifespan arising from dendritic electrodeposition of metallic Zn hinders their further development. Herein, a metal-organic framework (MOF) was constructed as front surface layer to maintain a super-saturated electrolyte layer on the Zn anode. Raman spectroscopy indicated that the highly coordinated ion complexes migrating through the MOF channels were different from the solvation structure in bulk electrolyte. Benefiting from the unique super-saturated front surface, symmetric Zn cells survived up to 3000 hours at 0.5 mA cm^-2 , near 55-times that of bare Zn anodes. Moreover, aqueous MnO₂ -Zn batteries delivered a reversible capacity of 180.3 mAh g^-1 and maintained a high capacity retention of 88.9 % after 600 cycles with MnO₂ mass loading up to 4.2 mg cm^-2 .

Keywords: metal-organic frameworks (MOFs); super-saturated electrolyte; zinc batteries; zinc electrodeposition.

Abstract

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