铝离子电池离子液体电解液的电化学特性研究

Electrochemical characteristics of ionic liquid electrolyte for aluminium-ion battery

离子液体电解液Al Cl4-具有良好的物理性质和电化学性质。采用离子液体Al Cl4-作为铝离子电池电解液,研究了不同比例Al Cl3与C6H11Cl N2对正负极材料的表面特性和电化学性能的影响。通过X射线衍射(XRD)、拉曼光谱仪、充放电测试、倍率特性测试、循环性能测试分析该离子液体的晶体结构、化学位移和电化学性能。其中Al Cl3/C6H11Cl N2=1.3时,铝离子电池的充放电比容量分别为91.67和91.60 m Ah/g,其5 C容量保持率是1 C的68%,循环100次后容量保持率为94.51%。

The ionic liquids electrolyte AICI4- has good physical properties and electrochemical properties. With ionicliquids as aluminum-ion battery electrolyte, the effect of different proportion of Al Cl3C6H11Cl N2 on surface propertiesand electrochemical performance were studied. By X-ray diffraction （XRD）, Raman spectroscopy, charge anddischarge test, ratio characteristics test and cyclic performance test, the crystal structure, chemical shifts and electro-chemical performance of cathode material were analyzed. When the proportion of Al Cl3/C6H11Cl N2=1.3, the chargeand discharge specific capacities of the material are 91.67 and 91.60 mAh/g at 0.1 C, the capacity retention at 5 C is68% at 1 C, and after 100 cycles, the capacity retention is 94.51% at 1 C.