草酸钴镍纳米花的合成及其电极材料类型的判断  

Capacitor or Battery-like:Synthesis of Cobalt Nickel Oxalate Nanoflower and Determination of Its Electrode Material Type

作　　者：李清 梁天颖 周世明 Li Qing;Liang Tianying;Zhou Shiming(Guangling College,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学广陵学院,江苏扬州225009

出　　处：《山东化工》2023年第18期73-75,80,共4页Shandong Chemical Industry

基　　金：江苏省高等学校大学生创新创业训练计划项目(202213987011Y);扬州大学广陵学院自然科学研究项目(ZKZD22004)。

摘　　要：判断电极材料的类型是研究能源存储和转换的基础。通过简单易控的室温沉积法制备花状草酸钴镍纳米材料,利用SEM、XRD对其微观形貌和结构进行探究,并在碱性电解液中进行电化学测试,判断电极材料的类型。结果表明,草酸钴镍电极材料符合电池型的特征。而作为对比的活性炭电极具有电容型电极的特征。在1 A·g^(-1)电流密度下,草酸钴镍电极的比容量为90.1 mAh·g^(-1)。当电流密度升高至10 A·g^(-1)时,比容量仍然能够保持77.2%;在1 A·g^(-1)时,活性炭电极的比电容是84.8 F·g^(-1),当电流密度增至10倍时,比电容衰减至68.8 F·g^(-1)(比电容保持率81.1%)。Judging an electrode material type is a basis of studying storing and converting energy.A simple and controllable room temperature deposition method was used to prepare flower shaped cobalt nickel oxalate nanomaterials.The microstructure and structure were investigated using SEM and XRD,and electrochemical testing was conducted in an alkaline electrolyte to determine the type of electrode material.The results indicated that the cobalt nickel oxalate electrode material conformed to the characteristics of the battery type.As a comparison,activated carbon electrodes had the characteristics of capacitive electrodes.At 1 A·g^(-1),the specific capacity of the cobalt nickel oxalate electrode was 90.1 mAh·g^(-1).At 10 A·g^(-1),the specific capacity can still maintain 77.2%;At 1 A·g^(-1),the specific capacitance of the activated carbon electrode was 84.8 F·g^(-1).At 10 A·g^(-1),the specific capacitance decays to 68.8 F·g^(-1)(with a specific capacitance retention rate of 81.1%).

关 键 词：草酸钴镍 活性炭 电池型 电容型 

分 类 号：TQ150[化学工程—电化学工业] TB34[一般工业技术—材料科学与工程]