不同活化剂对超级电容器活性炭性能的影响
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摘要
以毛竹为原料,分别使用氢氧化钾、磷酸、氯化锌为活化剂,气氛保护条件下,采用高温法制备活性炭。结果表明:氢氧化钾最适合作为制备超级电容器用活性炭的活化剂,漏电电流仅为0.117 m A,2 500次循环后比电容仍高达243.9F/g,容量保持率高达99.9%。
The activated carbon was prepared by using high temperature method under the condition of usingpotassium hydroxide, phosphoric acid and zinc chloride as activators and atmosphere. The results show thatpotassium hydroxide is most suitable as an activator for the preparation of activated carbon for advanced capacitors.The leakage current is as small as 0.117 m A, and the capacity is still up to 243.9 F/g after 2 500 cycles, and thecapacity retention rate is as high as 99.9%.
The activated carbon was prepared by using high temperature method under the condition of usingpotassium hydroxide, phosphoric acid and zinc chloride as activators and atmosphere. The results show thatpotassium hydroxide is most suitable as an activator for the preparation of activated carbon for advanced capacitors.The leakage current is as small as 0.117 m A, and the capacity is still up to 243.9 F/g after 2 500 cycles, and thecapacity retention rate is as high as 99.9%.
引文
[1] XIAO Y, LONG C,ZHENG M T, et al.High-capacity porous carbonsprepared by KOH activation of activated carbon for super-capacitors[J]. Chinese Chemical Letters, 2014, 25(6):865-868.
[2] GAO F,SHAO G H,QU J Y, et al.Tailoring of porous and nitrogen-rich carbons derived from hydrochar for high-performance super-capacitor electrodes[J]. Electrochimica Acta, 2015, 155:201-208.
[3] CHANG J L, GAO Z Y, WANG X R, et al. Activated porous carbonprepared from paulownia flower for high performance supercapaci-tor electrodes[J]. Electrochimica Acta, 2015, 157:290-298.
[4]邢宝林,李龙,马爱玲,等.微波法煤基活性炭的制备及其电化学性能研究[J].材料导报,2013,27(18):133-136.
[5]许瑞,韩昌隆,付成华,等.超级电容器对电池脉冲放电有益作用的研究[J].电源技术,2012,36(2):212-214.
[6]杨胜杰,梁亚丽,张振,等.超级电容器用竹基活性炭的制备[J].电源技术,2013,37(10):1793-1795.
[2] GAO F,SHAO G H,QU J Y, et al.Tailoring of porous and nitrogen-rich carbons derived from hydrochar for high-performance super-capacitor electrodes[J]. Electrochimica Acta, 2015, 155:201-208.
[3] CHANG J L, GAO Z Y, WANG X R, et al. Activated porous carbonprepared from paulownia flower for high performance supercapaci-tor electrodes[J]. Electrochimica Acta, 2015, 157:290-298.
[4]邢宝林,李龙,马爱玲,等.微波法煤基活性炭的制备及其电化学性能研究[J].材料导报,2013,27(18):133-136.
[5]许瑞,韩昌隆,付成华,等.超级电容器对电池脉冲放电有益作用的研究[J].电源技术,2012,36(2):212-214.
[6]杨胜杰,梁亚丽,张振,等.超级电容器用竹基活性炭的制备[J].电源技术,2013,37(10):1793-1795.