NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS SECONDARY BATTERY, AND NONAQUEOUS SECONDARY BATTERY

To provide a high-reliable negative electrode active material for nonaqueous secondary battery.SOLUTION: The negative electrode active material for nonaqueous secondary battery including graphite containing boron in which the size Lc of the crystallite in the c axial direction of the graphite is 100...

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Hauptverfasser:	NAKATSUTSUMI TAKAYUKI, OKANO TETSUYUKI, MAENISHI MAYUMI, HOJO NOBUHIKO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung:	To provide a high-reliable negative electrode active material for nonaqueous secondary battery.SOLUTION: The negative electrode active material for nonaqueous secondary battery including graphite containing boron in which the size Lc of the crystallite in the c axial direction of the graphite is 100 nm or more; an in Raman spectroscopy of the surface of graphite, the ratio R=Id/Ig of the maximum peak value Id of Raman strength in D band appearing in the range of Raman shift 1,300-1400 cmto the maximum peak value Ig of Raman strength in G band appearing in the range of Raman shift 1500-1650 cmis 0.4 or more.SELECTED DRAWING: Figure 1 【課題】信頼性の高い非水二次電池用負極活物質を提供する。【解決手段】ホウ素を含有する黒鉛を含む非水二次電池用負極活物質であって、黒鉛のｃ軸方向の結晶子の大きさＬｃが、１００ｎｍ以上であり、黒鉛の表面のラマン分光において、ラマンシフト１５００ｃｍ−１以上、１６５０ｃｍ−１以下の範囲に現れるＧバンドのラマン強度の最大ピーク値Ｉｇに対する、ラマンシフト１３００ｃｍ−１以上、１４００ｃｍ−１以下の範囲に現れるＤバンドのラマン強度の最大ピーク値Ｉｄの割合Ｒ＝Ｉｄ／Ｉｇが、０．４以上である。【選択図】図１