文章摘要
王超,姜时锋,郭晓艳,鲍俊杰,黄毅萍,许戈文.固态锂离子电池用聚碳酸酯型聚氨酯粘结剂[J].精细化工,2019,36(5):
固态锂离子电池用聚碳酸酯型聚氨酯粘结剂
Polyurethane Polyurethane binder for Solid State Lithium Ion Battery
投稿时间:2018-10-12  修订日期:2019-01-15
DOI:
中文关键词: 聚碳酸酯  聚氨酯  粘结剂  全固态锂离子电池
英文关键词: Polycarbonate  Polyurethane  Binder  Solid-state lithium-ion battery
基金项目:安徽省自然科学基金项目(1808085QE173);安徽省高校科学研究项目(KJ2017A031)
作者单位E-mail
王超 安徽大学 1354263112@qq.com 
姜时锋 安徽大学  
郭晓艳 安徽大学  
鲍俊杰 安徽大学  
黄毅萍 安徽大学 yphuang2001@sina.com 
许戈文 安徽大学  
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中文摘要:
      以聚碳酸酯(PC)、4,4-二环乙基甲烷二异氰酸酯(HMDI)为主要原料制备了聚碳酸酯型聚氨酯(PCPU)。用傅里叶变换红外光谱(FT-IR)、拉伸测试仪、同步热分析仪对合成的聚氨酯进行结构,力学,热稳定性能表征,并对组装的电池进行窗口、倍率、交流阻抗和循环性能测试。与传统PVDF粘结剂相比,PCPU粘结剂制备的正极片剥离强度更高,达到0.21N/cm;组装的SS/PCPU/Li半电池在0到5V电压范围内未发生明显氧化分解;当正极材料LiFePO4:SP:PCPU=60:20:20时制作的电池性能最好,玻璃强度达到0.32N/cm,在60℃、1C电流密度下放电比容量达到143mAh g-1,0.2C电流密度下循环50次容量保持率达到97%,显示出优异的电化学性能。
英文摘要:
      Polycarbonate-based polyurethane (PCPU) was prepared using polycarbonate (PC) and 4,4-dicyclohexylmethane diisocyanate (HMDI) as the main raw materials. Fourier transform infrared spectroscopy (FT-IR), tensile machines, and simultaneous thermal analyzers were used to characterize the structural, mechanical, and thermal stability of the synthesized polyurethanes. The electrochemical stability window, ac impedance, rate and cycling performance of the cells were tested. Compared with the traditional PVDF binder, the electrode prepared with PCPU binder has a higher peel strength of 0.21 N/cm; the assembled SS/PCPU/Li half cell does not occur significant electrochemical oxidation decomposition within the voltage range of 0 to 5V. The battery fabricated by the cathode with the mass ratio of LiFePO4: SP: PCPU = 60:20:20 showed the best comprehensive performance with the discharge capacity of 143 mAh g-1 at 1C at 60? C,the capacity retention reached 97 % at 0.2C after 50 cycles, which show the excellent electrochemical performance.
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