INFUSIBLE TREATMENT METHOD, METHOD FOR PRODUCING HARDLY GRAPHITIZABLE CARBON MATERIAL, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

• Main Authors: YOSHIDA YASUSHI, ARAKI YUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 01.02.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide an infusible treatment method suppressed in fusion, also high in an oxygen content and capable of obtaining an infusible-treated product showing excellent discharge capacity when being fired and made into a hardly graphitizable carbon material.SOLUTION: Provided is an infusible treatment method in which a crosslinking-treated product obtained by subjecting the raw material for a hardly graphitizable carbon material is subjected to infusible treatment. Upon the infusible treatment, at least one kind selected from the group consisting of Zn, Bi, Se and Sb is added to the crosslinking-treated product by 100 to 1,000 mass ppm.SELECTED DRAWING: None 【課題】融着が抑制され、かつ酸素量が高く、焼成して難黒鉛化性炭素材料としたときに優れた放電容量を示す不融化処理品が得られる、不融化処理方法を提供する。【解決手段】難黒鉛化性炭素材料の原料に架橋処理を施して得られる架橋処理品に不融化処理を施す、不融化処理方法であって、上記不融化処理に際して、Ｚｎ、Ｂｉ、ＳｅおよびＳｂからなる群から選ばれる少なくとも１種を、上記架橋処理品に対して１００〜１０００質量ｐｐｍ添加することを特徴とする、不融化処理方法。【選択図】なし