多界面耦合空心核壳MnCoSe_(x)/MnO@氮掺杂碳复合材料的制备及电化学性能  

Preparation of hollow core-shelled MnCoSe_(x)/MnO@nitrogen-doped carbon composite by multiple interfaces coupling and its electrochemical properties

作　　者：周济 张丽娜[2] 刘彬彬 徐彩霞 刘宏 Ji ZHOU;Li-na ZHANG;Bin-bin LIU;Cai-xia XU;Hong LIU(Institute for Advanced Interdisciplinary Research(iAIR),University of Jinan,Jinan 250022,China;Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China;State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China)

机构地区：[1]济南大学前沿交叉科学研究院(iAIR),济南250022 [2]济南大学山东省建筑材料制备与测试技术重点实验室,济南250022 [3]山东大学晶体材料国家重点实验室,济南250100

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第8期2471-2482,共12页中国有色金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51772133);the Taishan Scholar Project of Shandong Province,China(ZR2017JL022);the Project of“20 Items of University”of Jinan,China(No.2018GXRC001);Case-by-Case Project for Top Outstanding Talents of Jinan,China。

摘　　要：通过简单的溶剂热和硒化策略以及进一步的碳层包覆程序制备氮掺杂碳壳包裹的空心MnCoSe_(x)/MnO纳米球(MnCoSe_(x)/MnO@N-C)。得益于MnCoSe_(x)和MnO之间的多界面耦合以及独特的空心核壳结构,MnCoSe_(x)/MnO@N-C复合材料具有较高的比电容和优异的倍率性能,即使在5 A/g的高电流密度下,MnCoSe_(x)/MnO@N-C仍可以稳定运行20000次循环,并保持84.6%的初始比电容。由MnCoSe_(x)/MnO@N-C和活性炭组装的非对称超级电容器器件在功率密度为810 W/kg时表现出11.2 W·h/kg的高能量密度,并拥有超长的循环寿命,在20000次循环后仍可保留初始比电容的84.0%。Hollow MnCoSe_(x)/MnO nanospheres wrapped with nitrogen-doped carbon shell(MnCoSe_(x)/MnO@N-C)were prepared via a simple solvothermal and selenization strategy followed by the carbon coating procedure.Benefitting from the multiple interfaces coupling between MnCoSe_(x) and MnO and unique hollow core-shell architecture,MnCoSe_(x)/MnO@N-C composites possess high specific capacitance and superior rate capability,even at a high current density of 5 A/g,the MnCoSe_(x)/MnO@N-C can operate steadily for 20000 cycles with 84.6%of initial specific capacitance maintained.An asymmetric supercapacitor device assembled by MnCoSe_(x)/MnO@N-C and active carbon depicts a high energy density of 11.2 W·h/kg at a power density of 810 W/kg and a long cycle life with 84.0%of the initial specific capacitance retained after 20000 cycles.

关 键 词：硒化物 空心纳米球 氮掺杂碳 正极 超级电容器 电化学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]