Study of poly(organic palygorskite‐methyl methacrylate)/poly(ethylene oxide) blended gel polymer electrolyte for lithium‐ion batteries,Journal of Applied Polymer Science

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Study of poly(organic palygorskite‐methyl methacrylate)/poly(ethylene oxide) blended gel polymer electrolyte for lithium‐ion batteries
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-18 , DOI: 10.1002/app.49799
Ge Yuan _{1,

2,

3,

4,

5} , Hairong Zhang _{1,

2,

3,

4} , Mengkun Wang _{1,

2,

3,

4} , Xindong Chen _{1,

2,

3,

4,

5} , Haijun Guo _{1,

2,

3,

4} , Xinde Chen _{1,

2,

3,

4}

Affiliation

In this study, the composite polymer was prepared by blending poly(ethylene oxide) (PEO) and POPM (the copolymer of methyl methacrylate [MMA] and organically modified palygorskite), and then the composite polymer based membrane was obtained by phase‐inversion method. The scanning electron microscopy results showed that the composite polymer membrane has a three‐dimensional network structure. X‐ray diffraction results indicated that the crystalline region of PEO is disappeared when introduction of a certain amount of the PEO. Meanwhile, the elongation of composite polymer membrane increased when increasing PEO concentration, but the value of tensile strength of PEO‐POPM membrane decreased. When the mass fraction of PEO was 24%, the porosity and maximum value of ionic conductivity of the composite polymer membrane were 54% and 2.41 mS/cm, respectively. The electrochemical stability window of Li/gel composite polymer electrolyte/stainless steel batteries was close to 5.3 V (vs. Li⁺/Li), and the battery of Li/gel composite polymer electrolyte/LiFePO₄ showed good cycling performance and the discharge capacity of the battery were between 169.8 and 155 mAh/g. Meanwhile, the Coulombic efficiency of the battery maintained over 95% during the 80 cycles.

中文翻译：

锂离子电池用聚有机坡缕石-甲基丙烯酸甲酯/聚环氧乙烷共混凝胶聚合物电解质的研究

在这项研究中，通过将聚环氧乙烷（PEO）和POPM（甲基丙烯酸甲酯[MMA]和有机改性坡缕石的共聚物）共混来制备复合聚合物，然后通过相转化法获得复合聚合物基膜。扫描电子显微镜结果表明，复合聚合物膜具有三维网络结构。X射线衍射结果表明，当引入一定量的PEO时，PEO的结晶区域消失了。同时，随着PEO浓度的增加，复合聚合物膜的伸长率增加，但PEO-POPM膜的拉伸强度值降低。当PEO的质量分数为24％时，复合聚合物膜的孔隙率和离子电导率的最大值分别为54％和2.41 mS / cm，分别。Li /凝胶复合聚合物电解质/不锈钢电池的电化学稳定性窗口接近5.3 V（vs.Li⁺ / Li），并且Li /凝胶复合聚合物电解质/ LiFePO ₄的电池表现出良好的循环性能，并且电池的放电容量在169.8至155 mAh / g之间。同时，电池的库仑效率在80个循环中保持了95％以上。

更新日期：2020-10-30

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