新型炭材料2023，Vol.38Issue(1)：173-189,17.DOI:10.1016/S1872-5805(22)60606-1
毛细管破裂法制备中间相炭微球及其电化学性能
An innovative and efficient method for the preparation of mesocar-bon microbeads and their use in the electrodes of lithium ion batteries and electric double layer capacitors
摘要
Abstract
An innovative and efficient method for preparation of mesocarbon microbeads(MCMBs)was developed based on the dripping behavior and rheological properties of molten pitch during melt-spinning,where a string of beads was formed after the pitch was extruded from spinnerets and dropped into a receiving solvent(tetrohydrofuran or water).The pitch droplets were first carbon-ized,then activated by KOH or graphitized at 2 800 ℃ to prepare A-MCMBs or G-MCMBs,respectively,and these were respect-ively used as the electrode materials for electric double layer capacitors(EDLCs)and lithium-ion batteries(LIBs).Results showed that both MCMB-W prepared using water as the receiving solvent and MCMB-T prepared using tetrohydrofuran as the receiving solvent had a spherical shape with sizes of 1-2 μm.A-MCMB-T had a high specific surface area(1 391 m2 g?1),micropore volume(0.55 cm3 g?1)and mesopore volume(0.24 cm3 g?1),with a 30%higher specific capacitance than an activated mesophase carbon pre-pared under the same conditions,and its capacitance retention was significantly improved when it was used as an electrode material for EDLCs.G-MCMB-T had a high degree of graphitization(0.895)and when it was used as an electrode material for LIBs it had a high specific capacity of 353.5 mAh g?1 after 100 cycles at 100 mA g?1.This work reports a new preparation method for MCMBs,which could be used to prepare energy storage materials.关键词
中间相沥青/中间相炭微球/毛细管破裂法/锂离子电池/超级电容器Key words
Mesophase pitch/Mesocarbon microbeads/Delayed capillary breakup/Lithium-ion batteries/Electronic double layer capacitors分类
化学化工引用本文复制引用
董斯琳,杨建校,常胜凯,石奎,刘越,邹嘉玲,李君..毛细管破裂法制备中间相炭微球及其电化学性能[J].新型炭材料,2023,38(1):173-189,17.基金项目
This research is funded by the National Natural Science Foundation for Young Scientists of China(51702094)and the Natural Science Foundation of Hunan Province,China(2020JJ4203 and 2019JJ50651).国家自然科学基金青年科学基金(5172094) （51702094）
湖南省自然科学基金(2020JJ4203,2019JJ50651). （2020JJ4203,2019JJ50651）
