以生物质天然竹子和活化剂KOH为原料,采用碳化后活化的方法制备Bam-KOHx多孔碳材料.通过调控前驱体Bam与活化剂KOH的质量比,优化样品的孔道结构.氮气吸脱附测试显示,当Bam与KOH的质量比为1∶5时,材料具有最大的比表面积(1371.9 m2 g-1)、最大的微孔体积.拉曼光谱显示了 Bam-KOH5具有最高的缺陷程度.在电化学测试中,Bam-KOH5在1 A g-1电流密度下放电比容量为446 F g-1,进一步增大电流密度至50 A g-1时,容量剩余率仍达55％,表现出优异的电化学性能;Bam-KOH5在10000次循环充放后,放电容量剩余率仍保持为92.4％,表现出良好的稳定性,说明该材料为良好的超级电容器电极材料.
Preparation of bamboo-derived carbon material and its energy storage properties
Bam-KOHx porous carbon materials were prepared from biomass natural bamboo and activator KOH by carbonization fol-lowed by activation.The pore structure of the samples can be optimized by regulating the mass ratio of precursor Bam to activator KOH.Nitrogen adsorption and desorption tests showed that the material had the largest specific surface area(1371.9 m2 g-1)and the largest microporous volume when the mass ratio of Bam to KOH was 1∶5.Raman spectroscopy showed that Bam-KOH5 had the highest degree of defects.In electrochemical tests,the discharge specific capacity of Bam-KOH5 was 446 F g-1 at a current density of 1 A g-1,and when the current density was further increased to 50 A g-1,the capacity residual was still 55％,which showed excellent electrochemical per-formance;after 10000 cyclic charging and discharging cycles,the discharge capacity residual of Bam-KOH5 still remained 92.4％,which showed good stability,indicating that this material is a good supercell.This indicates that the material is a good electrode material for supercapacitors.
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