花状MgCo_(2)O_(4)@CoMn LDH复合材料的制备与性能研究  

Preparation and Properties of Flower-like MgCo_(2)O_(4)@CoMn LDH Nanocomposites

作　　者：胡潭伟 丁悦 唐梦凡 倪航 田玉[1] 朱小龙[1] 郑广[1] HU Tanwei;DING Yue;TANG Mengfan;NIHang;TIAN Yu;ZHU Xiaoong;ZHENG Guang(Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University,Wuhan 430056,Hubei,China)

机构地区：[1]江汉大学光电化学材料与器件教育部重点实验室,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2024年第4期5-14,共10页Journal of Jianghan University：Natural Science Edition

基　　金：江汉大学一流学科建设重大研究专项(2023XKZ007)

摘　　要：超级电容器(SCs)因其功率高、稳定性能好和快速的充放电能力,在储能设备领域受到广泛关注。采用水热法结合电沉积法合成花状MgCo_(2)O_(4)@CoMn层状双氢氧化物(LDH)复合材料。得益于MgCo_(2)O_(4)和CoMn LDH异质界面间的协同作用,改善了复合材料的电子传输;此外,低结晶度CoMn LDH的成功复合提供了良好的亲水性和活性位点;电化学测试中,复合材料在4.5 mg/cm^(2)的高负载量下,表现出1 501.8 F/g的高比电容,并且在20 A/g的电流密度下循环3 000次后,比电容保持率为82.98%,展示了其优异的循环稳定性。结果表明MgCo_(2)O_(4)@CoMn LDH复合材料可用作电化学储能的电极材料之一。Due to their high power,good stability performance,and fast charging and discharging capabilities,supercapacitors(SCs)have attracted much attention in energy storage devices.In this study,we synthesized flower-like MgCo_(2)O_(4)@CoMn layer-double hydroxide(LDH)composites by hydrothermal method and electrodeposition.Due to the synergistic interaction between the heterogeneous interfaces of MgCo_(2)O_(4) and CoMn LDH,the electron transport of the composites was improved.In addition,the successful composite of CoMn LDH with low crystallinity provided good hydrophilicity and active sites.In electrochemical tests,the composite material exhibited a high specific capacity of 1501.8 F/g at a high loading of 4.5 mg/cm^(2).At a current density of 20 A/g,the capacity retention was 82.98%after 3000 cycles.It turned out that the composite material demonstrated excellent cycling stability.The resultus show that the MgCo_(2)O_(4)@CoMn LDH composite can be used as one of the electrode materials for electrochemical energy storage.

关 键 词：层状双氢氧化物 MgCo_(2)O_(4) 电沉积法 复合材料 超级电容器 

分 类 号：TB383[一般工业技术—材料科学与工程] TM53[电气工程—电器]