Polysulfate solid polymer electrolyte and application thereof in lithium battery

The invention relates to a polysulfate solid polymer electrolyte and an application thereof in a lithium battery. The solid polymer electrolyte at least comprises a polysulfate polymer and a lithium salt, and the electrochemical window is greater than 4.2 V. The preparation method of the solid polymer electrolyte is simple and easy to operate, and the solid polymer electrolyte has good mechanical performance, high ionic conductivity, wide electrochemical window and high use value. And meanwhile, the solid polymer electrolyte can effectively inhibit the growth of lithium dendrites when being used for a system taking metal lithium as a negative electrode, so that the safety and the cycle capability of the battery are improved. 本发明涉及一种聚硫酸酯类的固态聚合物电解质及其在锂电池中的应用。固态聚合物电解质至少包括聚硫酸酯类高分子和锂盐，电化学窗口大于4.2V。本发明的固态聚合物电解质制备方法简单，容易操作，并且具有良好的机械性能，较高的离子电导率和较宽的电化学窗口，具有很高的使用价值。与此同时该固态聚合物电解质在用于以金属锂为负极的体系时可以有效抑制锂枝晶的生长，提高电池的安全性和循环能力。