以脲和硫氰酸盐为主体的高分子固体电解质的研究

Studies on New Polymeric Solid Electrolytes Based on Urea and Thiocyanate

在熔盐体系相图指导下研制出以脲和硫氰酸铵 (钾 )为主体的高分子固体电解质 ( PSE) ,其室温电导率分别为 1 .2 0× 1 0 - 2和 2 .6 5× 1 0 - 3 S/cm.考察了影响该 PSE电导率的因素 ,讨论了 PSE的导电机理 .结果表明 ,所研制的 PSE为无定形固熔体 ,主要通过硫氰酸盐的电离导电 ,电导率 -温度关系服从 VTF方程 .

The new polymeric solid electrolytes (PSE) based on urea(carbamide) and NH 4SCN(KSCN) were synthesized. Their ionic conductivity is higher than 1.20×10 -2 S/cm(2.65×10 -3 S/cm) at room temperature. The main factors influencing the ionic conductivity were analyzed. The conductivity mechanism of PSE were disscused. The results show that the PSE are amorphous solid solution and the main conductance is NH 4SCN(KSCN), which can ionize and conduct in the PSE, and the conductivity of PSE obeyed the VTF equation in the temperature range from 20 to 85 ℃.