过渡金属磷化物作为新兴的超级电容器材料受到越来越多的关注.以碳布(carbon cloth,CC)为基底,先以氯化镍、硝酸钴为原料通过水热法获得镍钴硫化物,再以次亚磷酸钠为原料,通过低温磷化法最终获得镍钴磷化物(Ni1/2Co1/2P/CC).电化学测试结果表明:在电流密度2 mA/cm2下,Ni1/2Co1/2P/CC的比电容高达0.87 F/cm2,在30 A/cm2下充放电2000次后,电容保持率为80.22%.此外,以Ni1/2Co1/2P/CC为正极,活性炭(activated carbon,AC)为负极组装的非对称超级电容器(Ni1/2Co1/2P/CC∥AC/NF)在104.99 mW/cm3的功率密度下,能量密度高达0.25 mWh/cm3.
Metal phosphide,as an emerging material for supercapacitors,has attracted more and more attention.In this paper,nickel-cobalt sulfide was obtained by hydrothermal method with carbon cloth(CC)as the substrate and nickel chloride and cobalt nitrate as the raw materials.Then nickel-cobalt phosphide(Ni1/2Co1/2P/CC)was finally obtained by low-temperature phosphating method with sodium hypophosphate as raw materials.Electrochemical tests were performed,and the results show that the specific capacitance of Ni1/2Co1/2P/CC is up to 0.87 F/cm2 at the current density of 2 mA/cm2.After 2000 cycles of charge and discharge at 30 A/cm2,the capacitance retention is 80.22%.In addition,with the Ni1/2Co1/2P/CC as positive electrode and the activated carbon(AC)as negative electrode,the asymmetric supercapacitor(Ni1/2Co1/2P/CC∥AC/NF)exhibits a high energy density of 0.25 mWh/cm3 at the power density of 104.99 mW/cm3.
钟存贵;于俊丽;谢留雨;蔡冰寒;赵明洋;吴兴哲
黄淮学院 化学与制药工程学院,河南 驻马店 463000
化学工程
超级电容器;碳布;赝电容;磷化物;非对称电容器
supercapacitor;carbon cloth;pseudocapacitance;phosphide;asymmetric capacitor
《材料工程》 2024 (007)
225-233 / 9
黄淮学院高学历人才科研启动项目(12011502);河南省高等学校大学生创新训练计划项目(202310918012)
10.11868/j.issn.1001-4381.2023.000739
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