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以甲壳胺(CTS)和钴、铁盐作有机前体与反应物,采用共沉淀法制备了CTS/钴铁层状双金属氢氧化物复合物.样品经过氩气氛、空气氛煅烧,生成氮掺杂部分石墨化碳/钴铁氧化物复合材料(N-PGC/CoFe-TMOs).CTS热解且被过渡金属催化生成部分石墨化碳,同时原位氮掺杂,氮/碳原子比例约为1/18.N-PGC/Co Fe-TMOs具有大孔和介孔结构,用作超级电容器电极材料兼有双电层电容与赝电容特征.在2 A·g~(-1)电流密度下,复合物比电容达到671.1 F·g~(-1),远大于纯钴铁氧化物比电容283.3 F·g~(-1),复合物具有典型的协同效应.电流密度增加到10 A·g~(-1)时,N-PGC/Co Fe-TMOs比电容为573.3 F·g~(-1),经过5000次充放电循环,复合物比电容保留率为66.4%.制备方法简便、通用,煅烧过程可一步制备氮掺杂的部分石墨化碳并与过渡金属氧化物复合,产物电化学性能优异.
CTS / cobalt iron layered double hydroxide complexes were prepared by coprecipitation using chitosan (CTS) and cobalt and iron salts as organic precursors and reactants.The samples were calcined under an argon atmosphere and air atmosphere to generate nitrogen Doped partially graphitized carbon / cobalt iron oxide composite (N-PGC / CoFe-TMOs) .CTS was pyrolyzed and catalyzed by transition metal to form partially graphitized carbon while in situ nitrogen doping with a nitrogen / carbon ratio of about 1 / 18. N-PGC / Co Fe-TMOs have macroporous and mesoporous structures and are used as supercapacitor electrode material with both electric double layer capacitance and pseudocapacitance characteristics.At the same time the current density of 2 A · g -1 , The specific capacitance of the composite reaches 671.1 F · g -1, which is much larger than the specific capacitance of 283.3 F · g -1 of pure cobalt iron oxide, and the composite has a typical synergistic effect. The current density increases to 10 A · G -1, the specific capacitance of N-PGC / Co Fe-TMOs was 573.3 F · g -1, and the specific capacitance retention of the composite was 66.4% after 5000 charge-discharge cycles. The common calcination process can prepare nitrogen-doped partially graphitized carbon in one step and complex with transition metal oxide, and the product has excellent electrochemical performance.