氧化铋-多孔碳复合材料的可控制备及其赝电容行为

Preparation of Bismuth Oxide-porous Carbon Composites and Their Pseudocapacitive Behavior

本文采用水热法制备氧化铋-多孔碳纳米复合材料,并将其作为负极材料来组装超级电容器器件,探讨氧化铋的含量对超级电容器比电容的影响。从循环伏安法,恒流充放电等电化学测试结果可以看出,随着复合物中氧化铋的质量分数从20%增加到80%,其构筑的超级电容器的比电容先增加后减少,当氧化铋的比例含量为50%时,复合材料具有最佳赝电容行为。

A hydrothermal method for preparing bismuth oxide porous carbon nanocomposites is reported in this paper.Using composite materials as cathode materials,we constructed supercapacitors and studied the effect of bismuth oxide content on the specific capacitance.As the mass fraction of bismuth oxide in the complex increased from 20%to 80%,the specific capacitance increased and then decreased.When the bismuth oxide content is 50%,the composite has the best capacitance.