摘要
有机聚合物材料因其特有的结构可设计性和优秀的氧化还原性能成为潜在的锂离子电池电极材料。本文合成了一种含有醌式结构的三苯胺衍生物功能单体(BDPAA),并通过氧化聚合法制备了聚[2,6-双(二苯基氨基)-9,10-蒽醌]聚合物(PBDPAA)。作为锂电池正极材料,新型电极材料展现出提高的比容量和倍率性能(与聚三苯胺电极材料比较)。该电极材料首次放电比容量为184.6mAh·g^(-1);充放电循环稳定性能研究表明,电极材料比容量在初始几圈迅速衰减,5圈之后基本稳定,50圈循环后比容量保持在93mAh·g^(-1);倍率性能研究表明,在20、50、100、200和500mA·g^(-1)电流倍率下,电极材料的放电比容量分别为119.3、104.9、92.1、90.3和79.7mAh·g^(-1)。电化学阻抗测试得到PBDPAA材料具有比PTPA材料的电荷迁移阻抗,这有利于材料的电化学性能提高。
Organic polymer materials have become potential electrode materials for lithium-ion batteries because of their unique structural designability and excellent redox properties.In this paper,a quinine-contained triphenylamine derivative functional monomer(BDPAA)was synthesized,and its polymer of poly[2,6-bis(diphenylamino)-9,10-anthraquinone]polymer(PBDPAA)was then prepared by oxidative polymerization.As the cathode material of lithium battery,the new electrode material showed improved specific capacity and rate performance(compared with polytriphenylamine electrode material).The first discharge specific capacity of PBDPAA was 184.6mAh·g^(-1);The study of cycle stability performance showed that the specific capacity of PBDPAA decayed rapidly in the initial few cycles,is basically stable after 5 cycles,and then remains at 93mAh·g^(-1)after 50 cycles;The study of rate performance showed that the specific discharge capacities of electrode materials are 119.3,104.9,92.1,90.3 and 79.7mAh·g^(-1)respectively at various current of 20,50,100,200,500mA·g^(-1).The electrochemical impedance test showed that PBDPAA material has more charge transfer impedance than PTPA material,which was benefit to the improved electrochemical properties of the electrode material.
作者
苏畅
马金鹏
初艳芳
费强
SU Chang;MA Jin-peng;CHU Yan-fang;FEI Qiang(Shenyang University of Chemical and Technology,Shenyang 110142,China)
出处
《化学工程师》
CAS
2022年第10期6-11,共6页
Chemical Engineer
基金
辽宁省教育厅项目(LJ2020005)
辽宁省“百千万人才工程”资助项目([2020]78)(2020921096)
辽宁省自然科学基金项目(2020-MS-232)
辽宁省教育厅项目(LJ2020004)。
关键词
电化学
锂离子电池
有机电极材料
三苯胺
蒽醌
electrochemistry
lithium-ion battery
organic electrode materials
triphenylamine
anthraquinone
