青岛科技大学  English 
李桂村
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教授 博士生导师  
硕士生导师  

教师拼音名称:liguicun

出生日期:1974-05-12

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所在单位:材料学院综合办公室

职务:材料科学与工程学院院长

学历:博士研究生

办公地点:材料楼225房间

性别:男

联系方式:guicunli@qust.edu.cn Tel:13730918070

学位:工学博士

职称:教授

毕业院校:中国海洋大学

学科:

材料物理与化学

曾获荣誉:

2016-01-01 山东省有突出贡献的中青年专家

2012-11-07 山东省第三届优秀研究生指导教师

2011-04-01 青岛拔尖人才

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Regulation of solvation structure and electrochemical performance optimization in Zn(NH2SO3)2-based electrolytes

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摘要:Monovalent anions, with relatively low charge density, exhibit weak bond energy with Zn2 ions, which facilitates the solubility of Zn salts and the regulation of solvation structures. In this study, zinc bis (aminosulfate) (Zn(NH2SO3)2) with a monovalent anion, NH2SO3- , was synthesized and dissolved in different ratios of dimethyl sulfoxide (DMSO) and H2O as electrolytes for Zn-ion batteries (ZIBs). From the perspective of game theory, the influences of DMSO and H2O on the solvation structure and electrochemical performance of the Zn(NH2SO3)2 based electrolytes has been meticulously discussed. Computations and spectra analysis indicate that DMSO molecules are reluctant to penetrate the primary solvation structure of Zn2 ions. Indeed, increasing DMSO in electrolytes can induce a transition from solvent-separated ion pairs (SSIP) to contact ion pairs (CIP), resulting in an enrichment of anions in the primary solvation structure. This alteration can significantly suppress parasitic reactions, enhance nucleation density, and refine the deposition morphology during the Zn plating process, leading to superior cyclic stability and high coulombic efficiency (CE) of Zn//Cu and Zn//Zn cells. However, the enrichment of anions in the primary solvation structure also inhibits the activity of Zn2 ions, amplifies the polarization effect, and engenders a sluggish ionization dynamics, resulting in the low energy conversion efficiency of the battery. These findings underscore the influence of the anion ratio within the primary solvation structure on electrochemical properties of electrolytes for ZIBs, which may be a pivotal determinant in the Zn deposition process. (c) 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

卷号:104

期号:-

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