γ射线辐照对竹炭电极电容性能的影响
Effect of γ-ray irradiation on capacitance performance of bamboo carbon electrode
杨胜杰 1张家幸 2方华 2王军 1梁峰1
作者信息
- 1. 河南豫融国防科技工业先进技术研究中心,河南 郑州 450044
- 2. 郑州轻工业大学新能源学院,河南 郑州 450002
- 折叠
摘要
以γ射线辐照的毛竹为原料,采用微波一步碳化活化工艺制备超级电容器用竹炭电极材料.利用低温N2 吸-脱附实验、XRD和SEM测试分析不同γ射线辐照剂量下制备的竹炭样品的物理性能,利用循环伏安和恒流充放电测试分析竹炭的电化学电容性能,研究γ射线辐照对竹炭电容性能的影响规律.最佳辐照剂量为 100 万Gy,在此条件下制备的竹炭样品AC-100,比表面积可达 988 m2/g,平均孔径为 2.38 nm.以竹炭为活性材料制备电极,6 mol/L KOH溶液为电解液,组装超级电容器,在 0～1 V充放电,显示出优良的倍率性能和循环稳定性:0.2 A/g电流下,放电比电容为 295 F/g;电流增加到10.0 A/g,比电容仍有 244 F/g;在 0.2 A/g下进行 5 000 次循环,电容保持率为 99.5%.
Abstract
By using bamboo experienced γ-ray irradiation as raw materials,bamboo carbon electrode materials are prepared through the one-step microwave carbonization process.The physical properties of bamboo carbon samples with different doses of γ-ray irradiation are characterized by low-temperature N2 adsorption/desorption,XRD and SEM tests.The electrochemical capacitive performances are tested by cyclic voltammetry and galvanostatic charge-discharge tests.The influence law is studied for the γ-ray irritation on the capacitive performance of the bamboo carbon samples.The optimum irradiation dose is 1 million Gy.The optimized bamboo carbon AC-100 sample shows the specific surface of 988 m2/g with an average pore size of 2.38 nm.The bamboo carbon is used as the active material to prepare electrode,the supercapacitor is assembled by using 6 mol/L KOH solution as the electrolyte.When charged and discharged in 0-1 V,it shows good rate capability and cycle stability.The specific discharge capacitance reaches 295 F/g at 0.2 A/g.When the current is increased to 10.0 A/g,the specific capacitance is still 244 F/g.The capacitance retention rate is 99.5%after 5 000 cycles at 0.2 A/g.
关键词
超级电容器/电极材料/活性炭/竹炭/γ射线辐照Key words
supercapacitor/electrode material/activated carbon/bamboo carbon/γ-ray irradiation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据