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以热剥离石墨烯为基底,通过一步水热法制备了CoOOH/MnO_2/石墨烯复合材料。采用XRD、SEM和TGA等技术对产品进行了表征。利用循环伏安法和恒电流充放电研究并比较了各单一材料与复合材料的电容性能。结果表明:CoOOH/MnO_2/石墨烯复合材料中石墨烯含量为65%时,比电容量最大高达509.00F/g。研究还发现复合材料具有相当好的循环稳定性能,循环1000次之后电容保持率高达84.45%,高于CoOOH/MnO_2纳米材料(63.95%)。
CoOOH / MnO 2 / graphene composites were prepared by one-step hydrothermal method based on thermally peeled graphene. The products were characterized by XRD, SEM and TGA. Cyclic voltammetry and constant current charge and discharge were used to study and compare the capacitance of each single material and composite. The results show that the specific capacitance of CoOOH / MnO 2 / graphene composites is up to 509.00 F / g when the content of graphene is 65%. The study also found that the composites have good cycling stability, and the capacity retention rate is as high as 84.45% after 1000 cycles, which is higher than that of CoOOH / MnO_2 nanomaterials (63.95%).