JP2013201125A5 - - Google Patents

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JP2013201125A5
JP2013201125A5 JP2013032824A JP2013032824A JP2013201125A5 JP 2013201125 A5 JP2013201125 A5 JP 2013201125A5 JP 2013032824 A JP2013032824 A JP 2013032824A JP 2013032824 A JP2013032824 A JP 2013032824A JP 2013201125 A5 JP2013201125 A5 JP 2013201125A5
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carbon material
aqueous secondary
negative electrode
secondary battery
multilayer
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JP2013032824A
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JP6251964B2 (en
JP2013201125A (en
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（４）炭素質物の添着量
本発明の複層構造炭素材における炭素質物の添着量は、黒鉛質粒子に対する炭素質物の被覆量を示すものであり、本発明においては好ましくはこれは０．０１〜２．７質量％であり、より好ましくは０．１質量％以上、更に好ましくは０．３質量％以上、特に好ましくは０．７質量％以上であり、また前記添着量は、好ましくは２．５質量％以下、より好ましくは２．３質量％以下、更に好ましくは２．１質量％以下、特に好ましくは１．８質量％以下、最も好ましくは１．３質量％以下である。 (4) Amount of carbonaceous material attached The amount of carbonaceous material attached to the multi-layer structure carbon material of the present invention indicates the amount of carbonaceous material coated on the graphite particles. In the present invention, this is preferably 0.01. To 2.7% by mass, more preferably 0.1% by mass or more, still more preferably 0.3% by mass or more, and particularly preferably 0.7% by mass or more. 0.5% by mass or less, more preferably 2.3% by mass or less, further preferably 2.1% by mass or less, particularly preferably 1.8% by mass or less, and most preferably 1.3% by mass or less.

Claims (7)

黒鉛質粒子の表面の少なくとも一部が炭素質物で被覆されてなり、下記条件（１）〜（３）を満たすことを特徴とする非水系二次電池用複層構造炭素材：
（１）該複層構造炭素材の平均粒径ｄ５０が１９．１μｍ以上５０μｍ以下である
（２）該複層構造炭素材の円形度が０．８８以上である
（３）下記に定義される圧延荷重（Ｐ）と、該複層構造炭素材のｄ５０との比（Ｐ／ｄ５０）が３０以下である：
Ｐ＝（前記複層構造炭素材を使用し、前記複層構造炭素材に対して１質量％のカルボキシメチルセルロースナトリウム塩と１質量％のスチレン・ブタジエンゴムをバインダーとして含む負極活物質を集電体上に１２．０ｍｇ／ｃｍ２の量で付着させた負極活物質層を作製し、前記負極活物質層の密度を１．６ｇ／ｃｍ３になるよう圧延するのに必要な線圧（ｋｇ／５ｃｍ））。 A multilayer carbon material for a non-aqueous secondary battery, characterized in that at least a part of the surface of the graphite particles is coated with a carbonaceous material and satisfies the following conditions (1) to (3):
(1) The average particle diameter d50 of the multi-layer structure carbon material is 19.1 μm or more and 50 μm or less (2) The circularity of the multi-layer structure carbon material is 0.88 or more (3) The ratio (P / d50) between the rolling load (P) and d50 of the multilayer carbon material is 30 or less:
P = (collecting negative electrode active material using the multi-layer structure carbon material and containing 1% by mass of carboxymethyl cellulose sodium salt and 1% by mass of styrene-butadiene rubber as a binder with respect to the multi-layer structure carbon material. A negative electrode active material layer deposited on the negative electrode active material layer in an amount of 12.0 mg / cm 2 was prepared, and the linear pressure (kg / kg) required to roll the negative electrode active material layer to a density of 1.6 g / cm 3. 5 cm)). 前記非水系二次電池用複層構造炭素材のタップ密度が０．８ｇ／ｃｍ３以上１．３０ｇ／ｃｍ３以下であることを特徴とする請求項１に記載の非水系二次電池用複層構造炭素材。 The multi-layer structure carbon material for a non-aqueous secondary battery has a tap density of 0.8 g / cm 3 or more and 1.30 g / cm 3 or less. Layered carbon material. 前記非水系二次電池用複層構造炭素材のＢＥＴ法により測定した比表面積が０．２ｍ２／ｇ以上４．５ｍ２／ｇ以下であることを特徴とする請求項１又は２に記載の非水系二次電池用複層構造炭素材。 The specific surface area measured by the BET method of the multilayer structure carbon material for non-aqueous secondary batteries is 0.2 m 2 / g or more and 4.5 m 2 / g or less. Multi-layer carbon material for non-aqueous secondary batteries. 前記黒鉛質粒子のラマンＲ値が０．１以上０．６以下であることを特徴とする請求項１〜３のいずれかに記載の非水系二次電池用複層構造炭素材。   The multilayered carbon material for a non-aqueous secondary battery according to any one of claims 1 to 3, wherein the graphite particles have a Raman R value of 0.1 or more and 0.6 or less. 黒鉛質粒子の表面の少なくとも一部が炭素質物で被覆されてなり、下記条件（１）〜（３）を満たすことを特徴とする非水系二次電池用複層構造炭素材：
（１）該複層構造炭素材の平均粒径ｄ５０が１９．１μｍ以上５０μｍ以下
（２）該複層構造炭素材の円形度が０．８８以上
（３）該複層構造炭素材における前記炭素質物の添着量が０．０１質量％以上２．７質量％以下。 A multilayer carbon material for a non-aqueous secondary battery, characterized in that at least a part of the surface of the graphite particles is coated with a carbonaceous material and satisfies the following conditions (1) to (3):
(1) The average particle diameter d50 of the multilayer carbon material is 19.1 μm or more and 50 μm or less. (2) The circularity of the multilayer carbon material is 0.88 or more. (3) The carbon in the multilayer carbon material The amount of the adhering material is 0.01 % by mass or more and 2.7% by mass or less. 集電体と、該集電体上に形成された複層構造炭素材層とを備える非水系二次電池用負極であって、該複層構造炭素材層が、請求項１〜５のいずれかに記載の非水系二次電池用複層構造炭素材を含有することを特徴とする、非水系二次電池用負極。   A negative electrode for a non-aqueous secondary battery comprising a current collector and a multilayer structure carbon material layer formed on the current collector, wherein the multilayer structure carbon material layer is any one of claims 1 to 5. A negative electrode for a non-aqueous secondary battery, comprising the multilayered carbon material for a non-aqueous secondary battery according to claim 1. リチウムイオンを吸蔵・放出可能な正極及び負極、並びに非水系電解液を備える非水系二次電池であって、前記負極が、請求項６に記載の非水系二次電池用負極であることを特徴とする非水系二次電池。   It is a non-aqueous secondary battery provided with the positive electrode and negative electrode which can occlude / release lithium ion, and non-aqueous electrolyte, Comprising: The said negative electrode is a negative electrode for non-aqueous secondary batteries of Claim 6. Non-aqueous secondary battery.
JP2013032824A 2012-02-24 2013-02-22 Multi-layer structure carbon material for non-aqueous secondary battery, negative electrode for non-aqueous secondary battery and non-aqueous secondary battery using the same Active JP6251964B2 (en)

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