氢氧化镁-硼酸锌复合阻燃剂辅助制备产率高和电容性能优异的煤焦油沥青基多孔碳
Preparation of coal tar pitch-based porous carbon with high yield and excellent capacitive performance assisted by magnesium hydroxide-zinc borate composite flame retardant
作者单位E-mail
郭嘉 新疆大学化学学院, 省部共建碳基能源资源化学与利用国家重点实验室, 乌鲁木齐 830017  
吴冬玲 新疆大学化学学院, 省部共建碳基能源资源化学与利用国家重点实验室, 乌鲁木齐 830017  
陶媛 新疆大学化学学院, 省部共建碳基能源资源化学与利用国家重点实验室, 乌鲁木齐 830017  
王涛 新疆大学化学学院, 省部共建碳基能源资源化学与利用国家重点实验室, 乌鲁木齐 830017  
朱艳丽 新疆大学化学学院, 省部共建碳基能源资源化学与利用国家重点实验室, 乌鲁木齐 830017  
贾殿赠 新疆大学化学学院, 省部共建碳基能源资源化学与利用国家重点实验室, 乌鲁木齐 830017 jdz@xju.edu.cn 
摘要: 以煤焦油沥青为前驱体,氢氧化镁-硼酸锌复合阻燃剂为助剂,直接在空气条件下高温碳化制备了煤沥青基多孔碳,并探究其电化学性能。得益于阻燃剂的阻燃协同其活化、掺杂功能化作用,得到了高产率(55.1%)、多原子(N、B、O)掺杂且具有分级多孔结构的多孔碳。将其作为超级电容器电极材料,在三电极体系中0.5 A·g-1电流密度下比电容可达344 F·g-1。此外,以制备的多孔碳和壳聚糖基氨基酸质子盐凝胶电解质组装的柔性对称电容器具有29.3 Wh·kg-1的高能量密度,在50 000次循环后电容保持率为96.9%,且在-25~75℃温度区间内可正常工作,显示出宽的温度使用范围。
关键词: 煤焦油沥青  阻燃剂  多孔碳  超级电容器
基金项目: 国家自然科学基金(No.22378343)和新疆维吾尔自治区天山英才——青年科技创新人才培养计划)项目(No.2022TSYCCX0058资助。
Abstract: Coal tar pitch-based porous carbon was prepared by carbonizing the carbon source of coal tar pitch and flame retardant of magnesium hydroxide-zinc borate composite salt directly in the air, and its electrochemical performance was explored. Thanks to the synergistic effect of flame retardants on flame retardancy, activation, and doping functionalization, coal tar pitch-based porous carbon with high yield (55.1%), multi-heteroatom doping, and hierarchical structure was obtained. As the electrode material for supercapacitor, the specific capacitance can reach 344 F·g-1 at a current density of 0.5 A·g-1 in a three-electrode system. In addition, the flexible capacitor assembled with the prepared porous carbon and chitosan amino acid proton salt gel electrolyte has an energy density of 29.3 Wh·kg-1, the capacitance remained 96.9% after 50 000 cycles, and it can work normally in the temperature range from -25 to 75 ℃, which had a wide operating temperature range.
Keywords: coal tar pitch  flame retardant  porous carbon  supercapacitor
投稿时间:2023-08-15 修订日期:2023-11-30
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郭嘉,吴冬玲,陶媛,王涛,朱艳丽,贾殿赠.氢氧化镁-硼酸锌复合阻燃剂辅助制备产率高和电容性能优异的煤焦油沥青基多孔碳[J].无机化学学报,2024,40(1):88-98.
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