Co3O4与CoO纳米粉体的制备及超电容性能比较研究  

Preparation of Co3O4 and CoO Nanopowders and Comparative Study on Their Supercapacitance Performance

作　　者：昌杰 桂君 王守玲 陈大勇[1,2] 吴国志 CHANG Jie;GUI Jun;WANG Shouling;CHEN Dayong;WU Guozhi(Key Laboratory of Micro-Nano Powder and Advanced Energy Material of Anhui Higher Education Institutes,Chizhou University,Chizhou 247000,China;School of Materials and Environmental Engineering,Chizhou University,Chizhou 247000,China)

机构地区：[1]池州学院,微纳粉体与先进能源材料安徽省教育厅重点实验室,池州247000 [2]池州学院材料与环境工程学院,池州247000

出　　处：《人工晶体学报》2020年第1期79-85,共7页Journal of Synthetic Crystals

基　　金：安徽省教育厅自然科学研究重点项目(KJ2019A0868,KJ2016A516);池州学院自然科学研究项目(2017ZRZ003)

摘　　要：采用简单液相沉淀的方法制取氢氧化钴前驱体,在空气或氢气中热处理分别获得立方晶系Co3O4与CoO纳米粉体材料。与CoO相比,Co3O4的尺寸略小,比表面积、孔径及孔容略大。电化学结果显示,Co3O4电极材料由于活性较高显示更大的比容量,在0.5 A/g时Co3O4及CoO分别为618 F/g及147 F/g。CoO具有更优的倍率充放电性能,10A/g相对于0.5 A/g时的容量保持率为49.0%,高于Co3O4的37.9%。经2000次循环,Co3O4及CoO的容量分别为初始容量的100%及137%,显示出优异的循环性能。Cubic Co3O4 and CoO nanopowders were obtained by annealing Co(OH)2 precursor prepared from facile liquid phase precipitation method under air or hydrogen atmosphere.Compared with CoO,Co3O4 nanopowders possess larger size,bigger specific surface area,average pore size and pore volume.The electrochemical results show that Co3O4 delivers higher specific capacitances because of its high electrochemical activity,Co3O4 and CoO could achieve 618 F/g and 147 F/g at 0.5 A/g,respectively.However,CoO displays better rate performance,and the capacitance retention at 10 A/g compared with 0.5 A/g is 49.0% higher than 37.9% of Co3O4.After 2000 cycle tests,the capacitance of Co3O4 and CoO could achieve 100%and 137% of their initial capacitances,implying their excellent cycle performances.

关 键 词：四氧化三钴 氧化亚钴 纳米粉体 超电容 

分 类 号：O646[理学—物理化学]