通过共沉淀法制备钴锰层状双金属氢氧化物（CoMn-LDH）。在制备过程中，考察了钴锰摩尔比、碱浓度、晶化时间对材料形貌与电化学性能的影响。结果表明，当钴锰摩尔比为2：1、碱浓度为2 mol/L、晶化时间为21 h时，在1 A/g的电流密度下，CoMn-LDH的比容量为952 F/g；经过1 000次充放电，比容量保持在92.7%；电流密度从0.5 A/g增加至10 A/g，比容量保持在79.8%。

Co Mn layered double hydroxides (CoMn-LDH) are prepared by means of coprecipitation method.During the preparation process,the effects of Co/Mn molar ratio,alkali concentration and crystallization time on the morphology and electrochemical properties of the material are investigated.The results show that the specific capacitance of CoMn-LDH can reach 952 F·g^-1 under a current density of 1 A·g^-1 when the molar ratio of cobalt to manganese is 2:1,the concentration of alkali is 2 mol·L^-1 and crystallization lasts for 21 h.Its specific capacitance can still remain 92.7% after 1,000 times of charge and discharge.Its specific capacitance remains 79.8% when the current density increases from 0.5 A·g^-1 to 10 A·g^-1.

张宁(1992-),男,硕士研究生,研究方向为超重力化工过程强化,znzbdx@163.com