双炭复合材料的制备及电化学性能研究  

Study on the preparation and electrochemical properties of dual carbon composite materials

作　　者：张永明 韩立新 李志强 陈萧 戴磊 龙柱 ZHANG Yongming;HAN Lixin;LI Zhiqiang;CHEN Xiao;DAI Lei;LONG Zhu(School of Textile Science and Engineering,Jiangnan University,Wuxi 214122,China;Lianyungang Fiber New Material Research Institute Co.,Ltd.,Lianyungang 222002,China;Liaocheng Key Laboratory of High Yield Clean Pulping and Special Cultural Paper,Liaocheng 252000,China)

机构地区：[1]江南大学纺织科学与工程学院,江苏无锡214122 [2]连云港纤维新材料研究院有限公司,江苏连云港222002 [3]聊城市高得率清洁制浆特种文化纸重点实验室,山东聊城252000

出　　处：《功能材料》2024年第10期10088-10094,共7页Journal of Functional Materials

基　　金：国家自然科学基金项目(22178208)。

摘　　要：酚醛树脂是一种成本低、含碳量丰富的常用炭前驱体。然而,酚醛树脂热解炭具有结构规定性较高、层间空间较小的特点,导致电化学储锌能力较差。具有分级多孔结构的植物纤维衍生炭是实现电解质快速扩散和提高电容器性能的理想材料。在此,以漂白针叶木浆作为纤维原料、酚醛树脂粉末作为填料,采用湿法造纸技术和热解炭化工艺成功制备了由针叶木纤维衍生炭和酚醛树脂热解炭构成的炭复合材料,并将其用作锌离子混合电容器自支撑正极材料。研究表明,针叶木纤维衍生炭赋予电极较高的比容量;酚醛树脂热解炭能够提高电极的循环稳定性。所组装的电容器具有优异的倍率性能和循环稳定性。在1 A/g的电流密度下的初始比容量为101.0 mAh/g,经过2500次循环以后,比容量为91.0 mAh/g,容量保持率为90%。Phenolic resin is a common carbon precursor with low cost and rich carbon content.However,phenolic resin pyrolytic carbon is often characterized by a relatively high degree of structural regularity and small interlayer spaces,resulting in poor electrochemical Zn-storage ability.Plant fiber derived carbon materials with hierarchical porous are highly desirable to achieve fast diffusion of electrolytes and enhance capacitor performance.Here,a carbon composite consisting of softwood fiber derived carbon and phenolic resin pyrolytic carbon was successfully prepared by wet papermaking technology and pyrolytic carbonization by using bleach softwood pulp as fiber raw material and phenolic resin powder as filler respectively.The obtained carbon composite was used as a self-supporting cathode material for zinc-ion hybrid capacitors.The results showed that the softwood fiber derived carbon endowed the electrode with higher specific capacity,and the phenolic resin pyrolytic carbon can improve the cyclic stability of the electrode.The assembled capacitor exhibited excellent rate performance and cycle stability.The initial specific capacity reached 101.0 mAh/g at the current density of 1 A/g.After 2500 cycles,the specific capacity was 91.0 mAh/g and the capacity retention rate was 90%.

关 键 词：锌离子混合电容器 针叶木纤维衍生炭 酚醛树脂热解炭 自支撑正极材料 

分 类 号：TS756[轻工技术与工程—制浆造纸工程]