【摘要】 采用聚碳酸亚丙酯（PPC）、偏氟乙烯-六氟丙烯共聚物（P（VDF-HFP））、双三氟甲烷磺酰亚胺锂（LiTFSI）、磷酸钛铝锂(Li_1.4Al_0.4Ti_1.6（PO₄）₃)和锂离子电池三元电解液(1 mol·L^-1LiPF₆的碳酸乙烯酯（EC）-碳酸二甲酯（DMC）-碳酸甲乙酯（EMC）溶液,V_EC∶V_DMC∶V_EMC=1∶1∶1)制得准固态复合电解质,其中液态电解质含量为9%（w/w）。准固态复合电解质膜在25℃下电导率达1.3×10^-4 S·cm^-1。与LiFePO₄组装成准固态锂电池,0.5C倍率下首次放电比容量达128.4 mAh·g^-1,充放电50次后容量保持率为80%。与纯聚合物准固态电解质相比,添加Li_1.4Al_0.4Ti_1.6（PO₄）₃可显著降低界面电阻。更多还原

【Abstract】 A quasi-solid composite electrolyte composed of polypropylene carbonate（PPC）, vinylidenefluoridehexafluoropropylene copolymer（P（VDF-HFP））, lithium bistrifluoroethanesulfonimide（Li TFSI）, lithium titanium aluminum phosphate(Li_1.4Al_0.4Ti_1.6（PO₄）₃) and ternary liquid electrolyte(1 mol·L^-1 LiPF₆ in ethylene carbonate（EC）-dimethyl carbonate（DMC）-ethyl methyl carbonate（EMC）, VEC∶VDMC∶VEMC=1 ∶1 ∶1) was prepared, where the liquid electrolyte accountedfor 9%（w/w） of the quasi-solid electrolyte. The electrolyte was flexible and free-standing with the thickness of 200～250 μm. The ionic conductivity at 25 ℃ was 1.3×10^-4 S·cm^-1. The LiFePO₄/Li cell with the quasi-solid electrolyte delivered specific capacities of 149.5, 128.4 and 113.7 mAh·g^-1 at 0.1 C, 0.5 C and 1 C respectively, and obtaineda capacity retention rate of 80% after 50 cycles at 0.5 C. Compared with bare polymer-based quasi-solid electrolyte, the quasi-solid electrolyte with Li_1.4Al_0.4Ti_1.6（PO₄）₃ obviously reduced interfacial resistance.更多还原