Solid polymer electrolytes (SPEs) with new functionalized ethyl cellulose bearing a lithium/sodium fluorosulfonylimide group (Ethyl cellulose-LiFSI/NaFSI) is proposed as quasi single ion (Li⁺/Na⁺) conducting polymer electrolyte for all-solid-state lithium and sodium batteries. The degree of ethyl cellulose functionalization by anion of lithium and sodium salt measured by elemental analysis was 48 and 53%, respectively. The complex of Li(FSI-ethyl cellulose)/PEO exhibits a Li-ion transference number of T_Li+ = 0.9, and a Na ion transference number of T_Na+ = 0.6 for Na(FSI-ethyl cellulose),which are much higher than those reported for ambipolar LiFSI or NaFSI/PEO SPEs under the same measurement conditions. The generated SPEs showed a high electrochemical and mechanical stability as well as a practical ionic conductivity value of ~10⁻⁴ S·cm⁻¹ at 80 °C. All solid-state lithium, sodium and Li/Sulfur cells cycled with quasi single ion conducting hybrid SPE exhibit reversible cycling and good performance at 70 °C, making them promising, environmentally benign and cost-effective candidates for use in advanced energy storage systems.

提出了具有新型功能化乙基纤维素（带有锂/氟磺酰亚胺酰亚胺基团）的固体聚合物电解质（SPEs）（乙基纤维素-LiFSI / NaFSI）作为准单离子（Li ⁺ / Na ⁺）导电聚合物电解质，用于全固态锂和钠电池。通过元素分析测得的锂和钠盐阴离子对乙基纤维素的官能化程度分别为48％和53％。Li（FSI-乙基纤维素）/ PEO的配合物的Li离子转移数为T _{Li +}  = 0.9，Na离子转移数为T _{Na +} 对于Na（FSI-乙基纤维素）= 0.6，远高于在相同测量条件下双极性LiFSI或NaFSI / PEO SPE的报告值。所生成的SPE显示出高的电化学稳定性和机械稳定性以及〜10的实际离子导电率值^{- 4}  S·厘米^{- 1}在80℃下。准单离子传导混合SPE循环的所有固态锂，钠和Li /硫电池在70°C时均具有可逆循环和良好的性能，使其成为有前途，对环境无害且具有成本效益的候选产品，可用于先进的储能系统。