Patent ID: 9711821
Date: 2017-07-18
CPC Classifications: H01M,Y02E,Y02P,Y02T,Y10T

Claim:
1. A method for preparing a lithium secondary battery, comprising: applying a plurality of capsules and a dispersion medium on at least one surface of a separator or on a surface of at least one of a cathode and an anode, each capsule having a film, wherein the film includes a binder polymer and inorganic particles, and wherein the capsules store a non-aqueous electrolyte solution; forming an electrode assembly by interposing the separator between the cathode and the anode; inserting the electrode assembly in a battery case; bringing the electrode assembly into thermocompression before, after, or both before and after, the electrode assembly is inserted in the battery case, to destroy the capsules thereby forming a destroyed capsule layer, bonding the destroyed capsule layer to the separator; and impregnateing the non-aqueous electrolyte solution into the electrode assembly, wherein the destroyed capsule layer comprises pores and micropores, wherein the micropores comprise interstitial volumes present between inorganic particles, and wherein the pores comprise interstitial volumes present between destroyed capsules, wherein the inorganic particles are inorganic particles having a dielectric constant of 5 or higher, inorganic particles having the ability to transport lithium ions, or a mixture thereof, wherein the inorganic particles having a dielectric constant of 5 or higher are selected from the group consisting of BaTiO wherein the inorganic particles having the ability to transport lithium ions are selected from the group consisting of lithium phosphate (Li