聚苯胺/FeFe(CN)_(6)复合正极材料的制备及电化学性能  

Preparation of Polyaniline/FeFe(CN)_(6) Composite cathodeand Its Electrochemical Performances

作　　者：宋梓萌 姜宇航 林馨雨 曹婕 高颖 班鑫宇 孙越 徐立环 SONG Zimeng;JIANG Yuhang;LIN Xunyu;CAO Jie;GAO Ying;BAN Xinyu;SUN Yue;XU Lihuan(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2023年第1期23-31,67,共10页Journal of Shenyang University of Chemical Technology

基　　金：辽宁省高校创新人才支持计划项目(LR2017034);辽宁省教育厅项目(LQ2017010)。

摘　　要：采用简单的原位氧化聚合法,在HClO_(4)溶液中制备聚苯胺/FeFe(CN)_(6)[PANI-FeFe(CN)_(6)]复合材料,制备的复合材料中PANI自组装成管状形貌,FeFe(CN)_(6)具有完美的面心立方晶格(FCC)结构并在PANI基体中分散良好.PANI-FeFe(CN)_(6)复合材料作为锂离子电池的正极材料,具有较高的比容量、循环稳定性和电流倍率性能等.PANI-FeFe(CN)_(6)(80%,质量分数,以下同)复合材料经100次循环后仍保持95.7 mAh/g的放电比容量,表明其具有优良的循环性能.在20、50、100、200和500 mA/g电流密度下,PANI-FeFe(CN)_(6)(80%)比容量分别为95.9、98.8、91.4、83.6和72 mAh/g,明显高于PANI和FeFe(CN)_(6)的比容量.PANI与FeFe(CN)_(6)组分之间形成的相互作用和复合材料导电性的提高使PANI-FeFe(CN)_(6)复合材料具有较高的电化学性能,使其成为潜在的新型锂电池正极材料.Polyaniline/FeFe(CN)_(6)[PANI-FeFe(CN)_(6)]composites were prepared by a simple in-situ oxidation polymerization in HClO_(4) solution.PANI self-assembled into tubular morphology in the prepared composites,while FeFe(CN)_(6) with perfect face-centered cubic lattice(FCC)structure and was well-dispersed in the obtained PANI matrix.As the cathode of lithium ion battery,PANI-FeFe(CN)_(6) composite demonstrates the improved specific capacity,cycling stability and current rate performances.The PANI-FeFe(CN)_(6)(80%)composite materials maintained a discharge capacity of 95.7 mAh/g after 100 cycles,indicating its excellent cycling performances.Especially,its specific capacities were 95.9,98.8,91.4,83.6 and 72 mAh/g at the currents densities of 20,50,100,200 and 500 mA/g,which was obviously higher than those of PANI and FeFe(CN)_(6),respectively.The significantly improved electrochemical performances for PANI-FeFe(CN)_(6) composites could be ascribed to the formed interaction between PANI and FeFe(CN)_(6) components and the enhanced electrical conductivity,which made it a potential candidate as the cathode of lithium battery.

关 键 词：聚苯胺 FeFe(CN)_(6) 锂离子电池 正极材料 

分 类 号：TQ152[化学工程—电化学工业]