Non-aqueous electrolyte secondary battery negative electrode material, making method, and lithium ion secondary battery
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsHirofumi Fukuoka, Mikio Aramata, Satoru Miyawaki, Susumu Ueno, Kazuma Momii
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Abstract
A non-aqueous electrolyte secondary battery negative electrode material is provided wherein a negative electrode active material containing a lithium ion-occluding and releasing material which has been treated with an organosilicon base surface treating agent is surface coated with a conductive coating. Using the negative electrode material, a lithium ion secondary battery having a high capacity and improved cycle performance is obtainable.
Claims9
A negative electrode material for non-aqueous electrolyte secondary batteries, wherein a negative electrode active material containing a lithium ion-occluding and releasing material which has been treated with an organosilicon base surface treating agent is surface coated with a conductive coating.
A method of preparing a negative electrode material for non-aqueous electrolyte secondary batteries, comprising the step of heat treating a negative electrode active material containing a lithium ion-occluding and releasing material which has been treated with an organosilicon base surface treating agent, in an atmosphere containing an organic material gas or vapor at a temperature in the range of 500 to 1400° C.
Dependencies are inferred from the claim text.