钇掺杂ZrO_(2)/PEO复合固态电解质的制备及性能研究

Preparation and Properties of PEO/Yttrium Doped ZRO_(2) Composite Solid Electrolyte

为了改善聚合物电解质的电化学性能,在PEO聚合物电解质体系中引入惰性钇掺杂ZrO_(2)(YSZ)无机填料,制备YSZ/PEO复合聚合物电解质(YCPE);研究填料浓度对YCPE性能的影响;并通过组装全固态电池对电解质的电化学性质进行评价。采用LiFePO_(4)正极和Li负极组装全固态电池,全电池初始放电比容量增大为164.5 mAh/g,循环50圈后容量降低至156.3 mAh/g,容量保持率95.2%。

In order to improve the electrochemical performance of polymer electrolytes,yttrium doped ZrO_(2)(YSZ)inorganic fillers were introduced into the PEO polymer electrolyte system to prepare YSZ/PEO based composite polymer electrolytes(YCPE),the effect of filler concentration on the performance of YCPE was studied,the electrochemical properties of electrolyte were evaluated by assembling all-solid-state battery.The initial discharge specific capacity of all solid-state battery assembled with LiFePO_(4)positive pole and Li negative pole increased to 164.5 mAh/g,and after 50 cycles,the capacity decreased to 156.3 mAh/g,with a capacity retention rate of 95.2%.