摘要
采用二次水热法制备四硫化二钴锰(MnCO_(2)S_(4))电极材料。通过X射线衍射仪、场发射扫描电子显微镜、循环伏安法测试、恒流充放电测试和交流阻抗测试分别对电极材料的结构、形貌和电化学性能进行表征和研究。结果表明:当硫化温度为160℃、硫化时间为6h时,制备的电极材料形貌呈大量纳米针状结构,末端有枝桠状形貌,纳米针相互交织,分布致密,材料结构最佳;当电流密度为1A/g时,电极材料质量比电容可达到873.5F/g。以MnCO_(2)S_(4)为正极材料,活性炭(AC)为负极材料组装成MCS//AC非对称超级电容器。电流密度为1A/g时,MCS//AC非对称超级电容器质量比电容为33.1F/g,当电流密度从1A/g增加到5A/g时,电容保持率为56%。
Manganese cobalt tetrasulfide(MnCO_(2)S_(4))electrode materials were synthesized via a two-step hydrothermal method.The structure,morphology and electrochemical performance of the electrode materials were characterized and investigated using X-ray diffraction,field emission scanning electron microscope,cyclic voltammetry,constant current charge-discharge tests,and alternating current impedance tests.The experimental results indicated that when the sulfurization temperature was 160℃and the sulfurization time was 6h,the prepared electrode material exhibited a morphology featuring numerous nano-needle structures with dendritic ends,and the nano-needles were interwoven with each other with dense distribution,forming the optimal material structure.The mass specific capacitance reached 873.5F/g at a current density of 1A/g.An MCS//AC asymmetric supercapacitor was assembled using MnCO_(2)S_(4)as the positive electrode material and activated carbon(AC)as the negative electrode material.The mass specific capacitance of MCS//AC asymmetric supercapacitor at a current density of 1A/g was 33.1F/g.Its capacitance retention rate was 56%when the current density increased from 1A/g to 5A/g.
作者
吕端哲
仲为礼
单孝晖
唐立丹
齐锦刚
Lv Duanzhe;Zhong Weili;Shan Xiaohui;Tang Lidan;Qi Jingang(School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001)
出处
《化工新型材料》
北大核心
2025年第9期144-149,共6页
New Chemical Materials
基金
辽宁省教育厅基础项目(JJL201915409)。
关键词
过渡金属硫化物
正极材料
非对称超级电容器
transition metal sulfides
positive electrode materials
asymmetric supercapacitors
