双硼酸锂对polymer共混固体电解质结构、微观结构及电化学性能的影响
Effect of lithium bis(oxalato)borate on the Structural, microstructural and electrochemical properties of blend solid polymer electrolyte
摘要：
采用溶液浇铸法制备了以PEO、PVP为主体的锂离子复合聚合物电解质LiBOB，考察了LiBOB对聚合物电解质的形貌、结构和电化学性能的影响。XRD和FESEM分析表明，盐的加入提高了非晶含量。FTIR光谱证明了络合物的形成。优化体系的离子电导率比无盐体系高两个数量级，即~0.5x10-5 S cm-1（@RT），当O/Li=16时，提高到~0.65 mS cm-1（@100 oC），电导率随温度的变化符合Arrhenius性质。高的离子（~0.99）证明了络合电解质的离子性质。DSC分析表明，结晶度的抑制和玻璃熔融温度向低温移动意味着非晶含量的增加。最后，提出了一个相互作用机制，探索离子传输机制。本电解质体系可作为固态电池的潜在候选者
英文摘要：
Blend solid polymer electrolyte based on PEO, PVP complexed with lithium LiBOB were synthesized by solution cast technique and impact of LiBOB on the morphology, structure, and electrochemical properties is examined. The XRD and FESEM analysis reveals the enhancement of amorphous content on salt addition. The FTIR spectroscopy evidences the complex formation. The ionic conductivity for optimized system was two order higher than salt free system, i.e. ~0.5x10-5 S cm-1 (@RT) and increases to ~0.65 mS cm-1 (@100 oC) for O/Li=16 and temperature dependent conductivity follows Arrhenius nature. The high tion (~0.99) evidences the ionic nature of complexed electrolyte. DSC analysis evidences the suppression of crystallinity and shift of glass & melting temperature toward lower temperature implies the enhancement of amorphous content. Finally, an interaction mechanism is proposed for exploring the ion transport mechanism. The present electrolyte system can be a potential candidate for application in solid-state batteries
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