Boosting zinc-ion storage performance by interlayer chemistry modulation on an organic-inorganic hybrid cathode

Bingyan Sang; Xiao Wang; Kaiqiang Feng; Shaonan Gu; Guijin Li; Kun Yue; Yanyan He; Qian Wang; Tingting Gao; Guowei Zhou

doi:10.1016/j.jcis.2023.09.052

Boosting zinc-ion storage performance by interlayer chemistry modulation on an organic-inorganic hybrid cathode

J Colloid Interface Sci. 2024 Jan;653(Pt A):199-208. doi: 10.1016/j.jcis.2023.09.052. Epub 2023 Sep 9.

Authors

Bingyan Sang¹, Xiao Wang², Kaiqiang Feng¹, Shaonan Gu¹, Guijin Li¹, Kun Yue¹, Yanyan He¹, Qian Wang¹, Tingting Gao¹, Guowei Zhou³

Affiliations

¹ Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
² Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China. Electronic address: wangxiao@qlu.edu.cn.
³ Key Laboratory of Fine Chemicals in Universities of Shandong, Jinan Engineering Laboratory for Multi-scale Functional Materials, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China. Electronic address: gwzhou@qlu.edu.cn.

PMID: 37713918
DOI: 10.1016/j.jcis.2023.09.052

Abstract

Aqueous zinc-ion batteries (AZIBs) have triggered a surge of scientific research due to the unique merits of high safety, volumetric specific capacity, and environmental benignity. However, the implementation of this technology is still plagued by the lack of high-performance cathodes that can output high energy density and exceptional cycle life and inadequate Zn reversibility. Here, an organic-inorganic hybrid cathode based on a poly(3,4-ethylenedioxythiophene) (PEDOT) intercalated hydrated vanadium oxide (denoted PVO), which delivers an ultrahigh discharge capacity of 513.1 mAh g^-1 (0.5 A g^-1) and an ultra-stable cycle with 95.3 % capacity retention and approximately 100 % Coulombic efficiency over 2000 cycles (20 A g^-1), is developed. Combining substantive measurements and theoretical calculations, it is demonstrated that favorable structural features with expanded interlayer galleries and robust architecture are believed to be responsible for the enhanced electrochemical performance, which can be further boosted by the improved Zn reversibility because of the introduction of maltitol electrolyte additive. This work provides a new attempt to achieve organic-inorganic composites for high-performance cathode materials of AZIBs and new insights into the charge storage behavior under the synergistic regulation of bilateral interfaces.

Keywords: Aqueous zinc ion batteries; Cathode; Organic-inorganic hybrid; PEDOT; Zn reversibility.