COMPOSITE POLYMER ELECTROLYTE FOR LITHIUM SECONDARY BATTERY CONTAINING SINGLE ION CONDUCTOR AND METHOD OF MANUFACTURING IT

摘要

PROBLEM TO BE SOLVED: To provide composite polymer electrolyte for a lithium secondary battery containing a single ion conductor and to provide its manufacturing method.

SOLUTION: The composite polymer electrolyte 10 includes a first polymer matrix 12 made of a first porous polymer with a first pore size; a single ion conductor, an inorganic material, and a second polymer matrix 14 made of a second porous polymer with a second pore size smaller than the first pore size. The second polymer matrix is coated on a surface of the first polymer matrix. The composite polymer matrix structure can increase mechanical properties. The single porous polymer matrix of a sub-micro scale containing ion conductor can enhance ionic conductivity and the charge/discharge cycle stability.

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