Abstract: Provided is a polymer electrolyte for lithium ion battery and a polymer battery, comprising polyether polymer and lithium salt, wherein the molar ratio of lithium ions in the lithium salt to oxygen atoms in ether bonds of the polyether polymer is more than 1/4; the polyether polymer comprises polymer of Formula 1: A-Rn; A is a hydrocarbyl group or an oxygen-containing hydrocarbyl group, n is an integer, and n?1; R is Ra and Rb are selected from alkylene, and Rx is selected from organic functional groups and halogen; m1 is a natural number greater than 0, n1 is a natural number, and when n1 is 0, n?3. Preferably, the ratio of the total number of carbon atoms in all repeating units of the polyether polymer to the total number of repeating units is over 4; More preferably, the polyether polymer has a branched structure.

Abstract: Provided is a polymer electrolyte for lithium ion battery and a polymer battery, comprising polyether polymer and lithium salt, wherein the molar ratio of lithium ions in the lithium salt to oxygen atoms in ether bonds of the polyether polymer is more than 1/4; the polyether polymer comprises polymer of Formula 1: A-Rn; A is a hydrocarbyl group or an oxygen-containing hydrocarbyl group, n is an integer, and n?1; R is ?O—Ra?m1?O—Rb?n1Rx; Ra and Rb are selected from alkylene, and Rx is selected from organic functional groups and halogen; m1 is a natural number greater than 0, n1 is a natural number, and when n1 is 0, n?3. Preferably, the ratio of the total number of carbon atoms in all repeating units of the polyether polymer to the total number of repeating units is over 4; More preferably, the polyether polymer has a branched structure.