溶剂热法制备聚酰亚胺微球及其电化学性能  

Preparation of polyimide microspheres by solvothermal method and their electrochemical performance

作　　者：李舒冰 王振兴 赵昕[1,2] 董杰[1,2] 张清华[1,2] LI Shubing;WANG Zhenxing;ZHAO Xin;DONG Jie;ZHANG Qinghua(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China;College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]东华大学材料科学与工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2023年第4期58-65,共8页Journal of Donghua University(Natural Science)

基　　金：上海市自然科学基金(18ZR1400600)。

摘　　要：为了研究聚酰亚胺(PI)作为锂离子电池负极材料时的电化学性能,以苯二胺(PDA)为二胺单体,采用溶剂热法将其分别与苯酮四羧酸二酐(BTDA)、联苯四甲酸二酐(BPDA)和二苯醚四甲酸二酐(ODPA)单体合成了3种化学结构不同的聚酰亚胺(PI)。利用傅里叶变换红外光谱仪(FTIR)、核磁共振波谱仪(NMR)、扫描电子显微镜(SEM)分别表征了BTDA-PDA、BPDA-PDA、ODPA-PDA型PI聚合物的结构和微观形貌,并分别探究了其作为锂离子电池负极材料的电化学性能。研究结果表明:BTDA-PDA型PI在0.1 mA/g的低电流密度下循环100次后,其容量保持率为97.8%;在10.0 mA/g的大电流密度下,BTDA-PDA型PI放电比容量为125.1 mA·h/g;当电流密度返回到0.1 mA/g时,BTDA-PDA型PI的容量保持率接近105%,表现出良好的电化学性能。因此,BTDA-PDA型PI电极材料具有一定的实际应用价值。To investigate the electrochemical properties of polyimide(PI)when used as an anode material for lithium-ion batteries.In this paper,p-phenylenediamine(PDA)was selected as the diamine monomer,and three different chemical structures of polyimides were prepared with three dianhydride monomers,namely,phenylketone tetracarboxylic acid dianhydride(BTDA),biphenyl tetracarboxylic acid dianhydride(BPDA)and diphenyl ether tetracarboxylic acid dianhydride(ODPA),respectively,using a solvothermal method.The structures and microscopic morphologies of the polymers were characterized using FTIR,NMR,SEM and other testing methods,and the electrochemical properties of the corresponding polymers as anode materials for lithium-ion batteries were investigated.The results show that the spherical nano-flower-like PDA-BTDA type PI with uniform size has superior electrochemical properties.The capacity retention rate was 97.8%after 100 cycles at low current density of 0.1 mA/g.The discharge specific capacity at high current density of 10 mA/g was 125.1 mAh/g.When returned to 0.1 mA/g current density,the PDA-BTDA type polyimide electrode exhibited good electrochemical performance with a capacity retention rate close to 105%.To investigate the electrochemical properties of polyimide(PI)used as an anode material for lithium-ion batteries,p-phenylenediamine(PDA)was selected as the diamine monomer,and three different chemical structures of polyimides were prepared with three kinds of dianhydride monomers of phenylketone tetracarboxylic acid dianhydride(BTDA),biphenyl tetracarboxylic acid dianhydride(BPDA)and diphenyl ether tetracarboxylic acid dianhydride(ODPA),respectively by a solvothermal method.The structures and microscopic morphologies of the polymers were characterized using Fourier transform infrared spectrometer(FTIR),nuclear magnetic resonance(NMR),and scanning electron microscope(SEM),and the electrochemical properties of the corresponding polymers as anode materials for lithium-ion batteries were investigated.The results show that

关 键 词：聚酰亚胺 微球 溶剂热反应 负极材料 锂离子电池 

分 类 号：O633[理学—高分子化学]