文章摘要
吴勰,薛照明,周莉,杨锦福.新型共混的PEO/TPU/PVDF-HFP基聚合物电解质的制备及性能[J].精细化工,2021,38(1):
新型共混的PEO/TPU/PVDF-HFP基聚合物电解质的制备及性能
Preparation and properties of new blended PEO/TPU/PVDF-HFP-based polymer electrolyte
投稿时间:2020-07-15  修订日期:2020-08-20
DOI:
中文关键词: 相转化法  聚氧化乙烯  热塑性聚氨酯  聚偏氟乙烯-六氟丙烯  凝胶态聚合物电解质
英文关键词: phase inversion method  polyethylene oxide  thermoplastic polyurethane  polyvinylidene fluoride-hexafluoropropylene  gel polymer electrolyte
基金项目:
作者单位E-mail
吴勰 安徽大学 wxhxgcygy@163.com 
薛照明 安徽大学 zmxue@ahu.edu.cn 
周莉 安徽大学  
杨锦福 安徽大学  
摘要点击次数: 64
全文下载次数: 0
中文摘要:
      通过相转化法制备基于聚氧化乙烯(PEO)/热塑性聚氨酯(TPU)/聚偏氟乙烯-六氟丙烯(PVDF-HFP)三种高聚物共混形成的电解质隔膜, 浸泡在1 mol/L六氟磷酸锂(LiPF6)的碳酸乙烯酯(EC): 碳酸二甲酯(DMC): 碳酸甲乙酯(EMC)=1:1:1的电解液中形成一种新型的凝胶态聚合物电解质(GPE)。采用SEM、FTIR、XRD、TG、DSC、拉伸性能和电化学性能进行了表征。结果表明,聚合物配比为3:1:4的隔膜具备均匀的多孔形貌,结晶峰面积最低,拉伸强度达到了15 MPa,离子电导率为7.9?10^(-3) S?cm,综合性能最佳。将聚合物配比为3:1:4的隔膜装配成CR2032纽扣电池进行电池循环性能测试,结果表明,在0.2 C下电池的充放电比容量分别达到了164 mAh/g和161 mWh/g,在150次循环后,放电比容量仍能保持在152 mAh/g 左右,库仑效率保持97%以上,是一种优异的电池材料。
英文摘要:
      An electrolyte separator based on the blending of three polymers of polyethylene oxide (PEO)/thermoplastic polyurethane (TPU)/polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) was prepared by phase inversion method. It was soaked in electrolyte which contains 1 mol /L lithium hexafluorophosphate (LiPF6) ethylene carbonate (EC): dimethyl carbonate (DMC): ethyl methyl carbonate (EMC) = 1:1:1 to form a new type of gel polymer electrolyte (GPE). Characterized by SEM, FTIR, XRD, TG, DSC, tensile properties and electrochemical properties. The results showed that the membrane with a polymer ratio of 3:1:4 has a uniform porous morphology, the crystalline peak area is the lowest, the tensile strength reaches 15MPa, and the ion conductivity is 7.9?10^(-3) S?cm,, the best overall performance. The separator with a polymer ratio of 3:1:4 was assembled into a CR2032 button battery for battery cycle performance testing. The results showed that the charge-discharge specific capacity of the battery reached 164 mAh/g and 161 mWh/g at 0.2 C, After 150 cycles, the discharge specific capacity can still be maintained at about 152 mAh/g, and the Coulomb efficiency remains above 97%, making it an excellent battery material.
  查看/发表评论  下载PDF阅读器
关闭