18763866. METHOD FOR PRODUCING SECONDARY BATTERY (Semiconductor Energy Laboratory Co., Ltd.)
Contents
METHOD FOR PRODUCING SECONDARY BATTERY
Organization Name
Semiconductor Energy Laboratory Co., Ltd.
Inventor(s)
Atsushi Kawatsuki of Yokohama (JP)
METHOD FOR PRODUCING SECONDARY BATTERY
This abstract first appeared for US patent application 18763866 titled 'METHOD FOR PRODUCING SECONDARY BATTERY
Original Abstract Submitted
One embodiment of the present invention is to provide a high-capacity lithium ion secondary battery and a production method thereof. To perform surface modification, a spherical resin is subjected to first heat treatment at a temperature higher than or equal to 500° C. in an inert atmosphere. By the heating, the contraction of a particle, the void formation due to a gas release from an inside of the particle, the crack on a particle surface, and the like are caused so as to form a support for sulfur that is to be mixed later. Obtained spherical particles and sulfur powder are mixed and then stored in a container. The mixture in the container is subjected to second heat treatment at a temperature higher than or equal to 120° C. without being exposed to outside air.
