硫酸镁添加剂对水系锌离子电池改性研究  

Study on Modification of Aqueous Zinc Ion Batteries with Magnesium Sulfate Additives

作　　者：张晋鹏 连一杰 周佳骏 干雅平[1] ZHANG Jin-peng;LIAN Yi-jie;ZHOU Jia-jun;GAN Ya-ping(Ecology and Health Institute,Hangzhou Vocational&Technical College,Zhejiang Hangzhou 310018,China)

机构地区：[1]杭州职业技术学院生态健康学院,浙江杭州310018

出　　处：《广州化工》2023年第4期68-70,90,共4页GuangZhou Chemical Industry

基　　金：浙江省大学新苗计划即“锌”中有“镁”——水系锌离子新能源电池电解液的开发及应用(2022R456C014)。

摘　　要：水系锌离子电池与锂电池相比:具备低成本、窄电化学稳定窗口以及高活性的特点,但锌金属容易产生析氢反应和枝晶偏析现象,进而导致电池内部电化学性能降低。为了改善此种现象,本研究提出了对ZnSO_(4)电解液进行改性,引入MgSO_(4)添加剂,设计优化电解液体系,添加了MgSO4后的电解液通过扫描电子显微镜照片、对称电池2 mA·cm^(-2)-2 mAh·cm^(-2)充放电、库伦效率及阻抗分析均证明,添加MgSO_(4)后的ZnSO4电解液优于纯ZnSO_(4),进而构建新型高性能、长寿命的水系锌基电池体系。Compared to traditional lithium batteries,AZIBs(aqueous zinc ion batteries)have the characteristics of low cost,narrow electrochemical stability windows and high activity.However,zinc metal is prone to hydrogen evolution reactions and dendritic segregation,leading to changes in the internal structure of zinc metal,which in turn leads to a decrease in the internal electrochemical performance of the battery.In order to improve this phenomenon,ZnSO_(4) electrolyte was proposed to modify,MgSO_(4) additives were introduced,and electrolyte system was designed and optimized.Through scanning electron microscope photos,symmetrical battery 2 mA·cm^(-2)-2 mAh·cm^(-2) charge and discharge,coulomb efficiency and impedance analysis,it was proved that the ZnSO_(4) electrolyte added with MgSO_(4) was superior to pure ZnSO_(4),thereby constructing a new type of high specific energy long life rechargeable zinc based battery system.

关 键 词：MgSO_(4) ZnSO_(4) 水系锌离子电池 析氢反应 

分 类 号：TQ152[化学工程—电化学工业]