煤质沥青基超级活性炭的提质处理及其电化学性能的研究

王凯; 高超; 李松恩; 王晋宇; 田晓冬; 宋燕

煤质沥青基超级活性炭的提质处理及其电化学性能的研究

王凯^1,2,3,
高超¹,
李松恩¹,
王晋宇¹,
田晓冬³,
宋燕^3,

1.
山西煤炭进出口集团科学技术研究院有限公司, 山西太原 030006;
2.
山西煤炭进出口集团博士后科研工作站, 山西太原 030006;
3.
中国科学院山西煤炭化学研究所, 炭材料重点实验室, 山西太原 030001

详细信息

作者简介:
王凯,博士后,工程师.E-mail:wangkaityuan@126.com

通讯作者:
宋燕,研究员.E-mail:yansong1026@126.com

中图分类号: TQ127.1⁺1
计量
- 文章访问数: 518
- HTML全文浏览量: 221
- PDF下载量: 295
- 被引次数: 0
出版历程
- 收稿日期: 2018-09-28
- 录用日期: 2018-12-27
- 修回日期: 2018-11-23
- 刊出日期: 2018-12-28

Electrochemical performance of high surface area activated carbons derived from coal tar pitch

1.
Institute of Science and Technology, Shanxi Coal Import and Export Group Co., LTD, Taiyuan 030006, China;
2.
Post-doctoral scientific research stations, Shanxi Coal Import and Export Group Co., LTD, Taiyuan 030006, China;
3.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

摘要

摘要: 以中温煤沥青为原料，采用预脱灰和后脱灰两种不同工艺并结合KOH活化法造孔，制备了超级活性炭。系统研究了制备工艺对样品中灰分含量、微观形貌、孔结构以及电化学性能的影响。结果表明，采用后脱灰工艺制备的样品，与仅KOH活化而未进行酸溶液处理的样品相比，其灰分含量均明显降低，比表面积显著提升，比容量明显提高。而采用预脱灰工艺制备的样品，与后脱灰工艺相比，其超级活性炭灰分含量更低（≤0.1 wt.%）、比表面积更大（2 722 m²·g^-1）、电化学性能优异。在0.2 A·g^-1电流密度下，比容量为295 F·g^-1，倍率性能良好（10 A·g^-1电流密度下仍为192 F·g^-1）。循环稳定性优异，经5 000次恒流充放电循环之后，电容保持率高达99%，在对称超级电容器50 W·kg^-1的功率密度下，能量密度可达到9.1 Wh·kg^-1，表明其优异的储能性能。
- 煤沥青 /
- 灰分 /
- 提质处理 /
- 电极材料 /
- 循环稳定性
Abstract: High surface area activated carbons were prepared by the KOH activation of coal tar pitch. Two purification methods were used, (i) the pitch was deashed before activation or (ii) the activated carbon was deashed after activation, both with hydrochloric acid and hydrofluoric acid. The effect of the deashing methods on the ash content, morphology, pore structure and electrochemical performance of the carbons for use as supercapacitor electrode materials was investigated. Results indicate that the activated carbon prepared with the pre-deashing treatment has a lower ash content (0.1 wt.%), higher surface area (2722 m² g^-1) and better electrochemical performance than the one produced by the post deashing method. The pre-deashed sample has a specific capacitance of 295 F g^-1 at a current density of 0.2 A g^-1, a good rate capability of 192 F g^-1 at 10 A g^-1 and a capacitance retention rate of 99% after 5000 charge-discharge cycles. A symmetrical supercapacitor using the pre-deashed sample delivers an energy density of 9.1 Wh kg^-1 at a power density of 50 Wh kg^-1.
- Coal tar pitch /
- Ash /
- Purification /
- Electrode materials /
- Cycling stability

HTML全文

下载: 全尺寸图片幻灯片

参考文献(17)

Otawa T, Nojima Y, Miyazaki T. Development of KOH activated high surface area carbon and its application to drinking water purification[J]. Carbon, 1997, 35(9):1315-1319.

刘洪波, 张红波, 伍恢和,等. 石油焦基高比表面积活性炭的制备[J]. 炭素技术, 1997, 4:15-19. (LIU Hong-bo, ZHANG Hong-bo, WU Hui-he, et al. Preparation of petroleum coke based activated carbon with high-specific surface area[J]. Carbon Techniques, 1997, 4:15-19.)

Ahmadpour A, Do D D. The preparation of active carbon from coal by chemical and physical activation[J]. Carbon, 1996, 34(4):471-479.

欧阳曙光, 周菊武, 虞继舜. 煤沥青基高表面积活性炭的研究-Ⅱ活化工艺参数对活性炭性能的影响[J]. 炭素, 1996, 1:28-32. (Ouyang Shu-guang, Zhou Ju-wu, Yu Ji-shun. Study on coal tar pitch based high specific surface area activated carbon-Ⅱ Influence of technology parameters of activation on properties of activated carbon[J]. Carbon(China), 1996, 1:28-32.)

Qiao W M, Ling L C, Zha Q F, et al. Preparation of a pitch-based activated carbon with a high specific surface area[J]. Journal of Materials Science, 1997, 32(16):4447-4453.

张晓昕,郭树才,邓贻钊. 高比表面积活性碳的制备[J]. 材料科学与工程,1996, 14(4):34-37. (ZHANG Xiao-xin, GUO Shu-cai, DENG Yi-zhao. The new technique to prepare high surface area activated carbon[J]. Materials Science & Engineering, 1996, 14(4):34-37.)

Wigmans T, Hoogland A, Tromp P, et al. The influence of potassium carbonate on surface-area development and reactivity during gasfication of activated carbon by carbon-dioxide[J]. Carbon, 1983, 21(1):13-22.

曹其华, 冯安祖. 煤中灰成分对活性炭吸附性能的影响[J]. 煤化工, 1991, 54(1):8-11. (CAO Qi-hua, FENG An-zu. The effect of coal ash on the adsorption performance of activated carbons[J]. Journal of Coal Chemistry, 1991, 54(1):8-11)

韩露, 李开喜, 高峰. 工艺参数及灰分对煤基活性炭吸附性能的影响[J]. 煤炭转化, 2008, 32(3):71-76. (HAN Lu, LI Kai-xi, GAO Feng. Effects of process parameters and ash on the adsorption property of activated carbon from coals[J]. Coal Conversion, 2008, 32(3):71-76.)

白宗庆,陈皓侃,李文,等. 酸处理对活性炭性质及其催化裂解甲烷制氢性能的影响[J]. 中国矿业大学学报,2006, 35(2):246-250. (BAI Zong-qing, CHEN Hao-kan, LI Wen, et al. Effects of acid treatment to activated carbons on their properties and catalytic performance in hydrogen production by methane decomposition[J]. Journal of China University of Mining & Technology, 2006, 35(2):246-250.)

颜丙峰,杜淑凤,张晓静. 煤液化沥青脱除灰分的研究[J]. 煤炭转化, 2013, 36(2):33-35. (YAN Bing-feng, DU Shu-feng, ZHANG Xiao-jing. Study on coal liquefaction pitch removal of ash[J]. Coal Conversion, 2013, 36(2):33-35.)

Guan T T, Li K X, Zhao J H, et al. Template-free preparation of layer-stacked hierarchical porous carbons from coal tar pitch for high performance all-solid-state supercapacitors[J]. Journal of Materials Chemistry A, 2017, 5:15869-15878.

Lillo-Ródenas M A, Cazorla-Amorós D, Linares-Solano A. Understanding chemical reactions between carbons and NaOH and KOH:An insight into the chemical activation mechanism[J]. Carbon, 2003, 41(2):267-275.

Wu F C, Tseng R L, Hu C C, et al. Effects of pore structure and electrolyte on the capacitive characteristics of stream- and KOH-activated carbons for supercapacitors[J]. Journal of Power Sources, 2005, 144(1):302-209.

Wang K, Zhao N, Lei S W, et al. Promising biomass-based activated carbons derived from willow catkins for high performance supercapacitors[J]. Electrochimica Acta, 2015, 166(1):1-11.

Zhao L, Fan L Z, Zhou M Q, et al. Nitrogen-containing hydrothermal carbons with superior performance in supercapacitors[J]. Advanced Materials, 2010, 22(45):5202-5206.

Hulicova-Jurcakova D, Seredych M, Lu G Q, et al. Combined effect of nitrogen- and oxygen-containing functional groups of microporous activated carbon on its electrochemical performance in supercapacitors[J]. Advanced Functional Materials, 2009, 19(3):438-447.

施引文献

资源附件(0)

访问统计