التفاصيل البيبلوغرافية
| العنوان: |
溶剂热法制备聚酰亚胺微球及其电化学性能. (Chinese) |
| Alternate Title: |
Preparation of polyimide microspheres by solvothermal method and their electrochemical performance. (English) |
| المؤلفون: |
李舒冰, 王振兴, 赵 昕, 董 杰, 张清华 |
| المصدر: |
Journal of Donghua University (Natural Science Edition); Aug2023, Vol. 49 Issue 4, p58-65, 8p |
| مصطلحات موضوعية: |
LITHIUM-ion batteries, FOURIER transform spectrometers, PHENYL ethers, NUCLEAR magnetic resonance, SCANNING electron microscopes, MONOMERS, POLYIMIDES, DIAMINES |
| Abstract (English): |
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 the BTDA-PDA type PI has superior electrochemical properties. The capacity retention rate is 97.8% after 100 cycles at low current density of 0.1 mA/g. The discharge specific capacity at high current density of 10.0 mA/g is 125.1 mA·h/g. When it returns to 0.1 mA/g current density, the BTDA-PDA type PI electrode exhibits good electrochemical performance with a capacity retention rate close to 105%. Therefore, this kind of electrode materials show practical application values. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
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。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |