1,5-二氨基蒽醌(AAQ)复合材料用作锂离子电池新型正极材料的性能研究  

Studies on the Properties of 1,5-Diaminoanthraquinone(AAQ)Composite Used as New Positive Electrode Material in Lithium Ion Batteries

作　　者：王筑城 刘磊[1,2] 朱梦媛[1] 孙悦 赵晴 丁玉寅 陆继鑫 王存国 李奇[2] 贺爱华 叶付臣[3] Wang Zhucheng;Liu Lei;Zhu Mengyuan;Sun Yue;Zhao Qing;Ding Yuyin;Lu Jixin;Wang Cunguo;Li Qi;He Aihua;Ye Fuchen(Key Laboratory of Rubber-plastics,Ministry of Education,Shandong Province Key Lab.of Olefin Catalysis and Polymerization,Qingdao University of Science and Technology,Qingdao 266042;Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO),Chinese Academy of Sciences(CAS),Suzhou,Jiangsu 215123;Enchem Tianrun New Energy Materials(Shandong)Co.,Ltd.,Zaozhuang 277800)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室、山东省烯烃催化与聚合重点实验室,青岛266042 [2]中科院苏州纳米技术与纳米仿生研究所,苏州215123 [3]亿恩科天润新能源材料(山东)有限公司,枣庄277800

出　　处：《化学学报》2024年第6期589-595,共7页Acta Chimica Sinica

基　　金：国家自然科学基金项目(No.51972330);国家重点研发计划项目(Nos.2022YFB3704700,2022YFB3704702);山东省重大科技创新工程项目(No.2021CXGC010901);泰山学者工程专项经费资助项目(No.TS201511031);山东省教育厅基金资助项目(No.SDYJG19089)资助。

摘　　要：有机共轭小分子材料1,5-二氨基蒽醌(AAQ)作为锂离子电池的一种有机正极材料,由于其制备简便、理论比容量较高和循环性能比较稳定等优点,成为新能源电池材料的研究重点.然而,由于其本征材料导电性较差并在电解液中存在溶解等现象,影响了其电化学性能,从而限制了其进一步的应用.本工作采用超声法将AAQ分散在金属有机骨架多孔材料(MOFs)-氮掺杂多孔碳(ZIF-8C)内,再通过高温熔融法制备了多孔碳骨架复合材料AAQ@ZIF-8C;并通过溶液聚合法,制备出了聚丙烯酸(PAA)和聚苯胺(PAN)有机结合的共混物(PAA-PAN);最后通过球磨法将上述材料混合,制备出AAQ@ZIF-8C/PAA-PAN复合电极材料,并通过红外光谱、扫描电子显微镜、电化学循环伏安法及交流阻抗法等对复合电极材料分别进行了结构表征、形貌分析及电化学性能测试. PAA-PAN与AAQ@ZIF-8C结合后,形成了导电互穿网络结构,既提高了电极活性材料AAQ的导电性,同时又抑制了AAQ在电解液中的溶解性;另外,具有多孔的ZIF-8C骨架材料有利于电解质离子的快速扩散和迁移,提高了电池的可逆容量.用该复合电极材料组装的锂离子电池,在0.1C库伦倍率下充放电,可逆容量达203mAh·g^(-1),接近其理论比容量225mAh·g^(-1),经过200次循环后,可逆容量仍达195 mAh·g^(-1),库仑效率达95%.Organic conjugated small molecular material 1,5-diaminoanthraquinone(AAQ),as an organic cathode material for lithium-ion battery,has become the research focus of new energy battery materials because of its simple preparation,high theoretical specific capacity and stable cycle performance.However,due to its poor conductivity and dissolution in electro-lyte,its electrochemical properties are affected,which limits its further application.In this work,AAQ was dispersed in metal organic framework porous materials(MOFs)-Nitrogen-doped porous carbon(ZIF-8C)by ultrasonic method,and then po-rous carbon framework composites AAQ@ZIF-8C were prepared by heat-treatment method.Copolymer PAA-PAN was pre-pared by solution polymerization method with polyacrylic acid(PAA)and aniline(AN)monomer.Finally,AAQ@ZIF-8C/PAA-PAN composite electrode material were prepared with above materials by ball milling method.The structure,morphol-ogy and electrochemical properties of the composite electrode materials were characterized by infrared spectroscopy,scan-ning electron microscopy,electrochemical cyclic voltammetry and AC impedance method.When PAA-PAN combined with AAQ@ZIF-8C,the conductive interpenetrating network structure is formed in AAQ@ZIF-8C/PAA-PAN composite,which not only improves the conductivity of the electrode active material AAQ,but also inhibits the solubility of AAQ in the elec-trolyte.In addition,the porous ZIF-8C skeleton material is conducive to the rapid diffusion and migration of electrolyte ions and improves the reversible capacity of the battery.High solubility in aprotic organic electrolytes and poor electrical conduc-tivity are the main restrictions of organic electrodes in practical application.Conductive binder contributes to the high-performance electrodes as it enables both mechanical and electronic integrity of the electrode,which have been scarcely explored for organic electrodes.As we know,state-of-the-art lithium-ion battery(LIB)electrodes choose polyvinylidene fluo-ride(PVDF)as the binder because of its good

关 键 词：1 5-二氨基蒽醌 ZIF-8C 金属有机骨架材料 导电粘合剂 锂离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动] TB33[一般工业技术—材料科学与工程]