リチウムイオン電池用負極材及びその用途

Negative electrode material for lithium ion battery and application thereof

Abstract

【課題】充放電容量が大きく、充放電サイクル特性および急速充放電特性に優れたリチウムイオン電池を提供する。 【解決手段】リチウムを吸蔵・放出可能な元素を含有する粒子(A)と、黒鉛材料を含有する炭素粒子(B)との混合物からなる負極材であって、炭素粒子は、アスペクト比が1以上5以下で、体積基準累積粒度分布における50%粒子径が2〜40μmで、且つタッピング嵩密度が1.0g/cm 3 以上1.35g/cm 3 以下であり;黒鉛材料は、ラマン分光スペクトルで測定される1360cm -1 の付近にあるピークの強度と1580cm -1 の付近にあるピークの強度との比が0.01以上0.2以下で、30℃〜100℃の熱膨張係数が4.0×10 -6 /℃以上5.0×10 -6 /℃以下で、面間隔d 002 が0.3340nm〜0.3380nmで、且つ石油系コークス及び/又は石炭系コークスを2500℃以上で熱処理して得られる負極材。 【選択図】図6
PROBLEM TO BE SOLVED: To provide a lithium ion battery excellent in charge and discharge cycle characteristics and rapid charge and discharge characteristics while having a large charge and discharge capacity.SOLUTION: This negative electrode material comprises a mixture of a particle (A) containing an element capable of occluding and discharging lithium and a carbon particle (B) containing a graphite material. In this carbon particle, an aspect ratio is not less than 1 and not more than 5, a 50% particle diameter in a volume reference cumulative particle size distribution is 2-40 μm, and tapping volume density is not less than 1.0 g/cmand not more than 1.35/cm; in the graphite material, the ratio of peak intensity in the vicinity of 1,360 cmmeasured by a Raman spectrum to a peak intensity in the vicinity of 1,580 cmis not less than 0.01 and not more than 0.2, a thermal expansion coefficient at 30°C-100°C is not less than 4.0×10/°C and not more than 5.0×10, and a spacing dis 0.3340 nm-0.3380 nm. The graphite material is obtained by applying heat treatment to petroleum based coke and/or coal based coke at not less than 2,500°C.

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Patent Citations (6)

    Publication numberPublication dateAssigneeTitle
    JP-2004214055-AJuly 29, 2004Samsung Sdi Co Ltd, 三星エスディアイ株式会社Negative electrode active material for lithium secondary battery, and lithium secondary battery
    JP-2004362789-ADecember 24, 2004Nec Corp, Nec Tokin Corp, Nec Tokin Tochigi Ltd, Necトーキン栃木株式会社, Necトーキン株式会社, 日本電気株式会社Negative electrode material and secondary battery using it
    JP-2005108774-AApril 21, 2005Samsung Sdi Co Ltd, 三星エスディアイ株式会社Negative electrode active material for lithium secondary battery, lithium secondary battery, and manufacturing method of negative electrode active material for lithium secondary battery
    JP-2007153661-AJune 21, 2007Showa Denko Kk, 昭和電工株式会社黒鉛材料、電池電極用炭素材料、及び電池
    JP-2007172901-AJuly 05, 2007Showa Denko Kk, 昭和電工株式会社黒鉛材料、電池電極用炭素材料、及び電池
    JP-2007294374-ANovember 08, 2007Hitachi Chem Co Ltd, Sanyo Electric Co Ltd, 三洋電機株式会社, 日立化成工業株式会社Negative electrode material for nonaqueous electrolytic liquid secondary battery, negative electrode for nonaqueous electrolytic liquid secondary battery using negative electrode material, and nonaqueous electrolytic liquid secondary battery

NO-Patent Citations (0)

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