JP2004083398A5 - - Google Patents

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JP2004083398A5
JP2004083398A5 JP2003185105A JP2003185105A JP2004083398A5 JP 2004083398 A5 JP2004083398 A5 JP 2004083398A5 JP 2003185105 A JP2003185105 A JP 2003185105A JP 2003185105 A JP2003185105 A JP 2003185105A JP 2004083398 A5 JP2004083398 A5 JP 2004083398A5
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mesocarbon
viscosity
microspheres
mpa
carbon material
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JP2003185105A
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Japanese (ja)
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JP2004083398A (en
JP4335596B2 (en
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Description

【0010】
また、本発明は、熱処理により形成されたメソカーボン小球体を含む易黒鉛化炭素材料に、有機溶媒を添加して、粘度が1〜100 mPa s となるように粘度調整後、ろ過によりメソカーボン小球体を分離し、得られたメソカーボン小球体を黒鉛化する多結晶メソカーボン小球体黒鉛化品の製造方法である。この製造方法は、複数の結晶からなり、各結晶のC軸方向がランダムな方向をなしている多結晶メソカーボン小球体黒鉛化品の製造方法として好適である。
[0010]
In the present invention, an organic solvent is added to a graphitizable carbon material containing mesocarbon small spheres formed by heat treatment, and the viscosity is adjusted to 1 to 100 mPa · s so that the viscosity is adjusted by filtration. It is a method for producing a polycrystalline mesocarbon microsphere graphitized product, comprising separating carbon nanospheres and graphitizing the obtained mesocarbon small spheres. This manufacturing method is suitable as a manufacturing method of a polycrystalline mesocarbon small spherical graphitized product which is composed of a plurality of crystals and in which the C-axis direction of each crystal has a random direction.

【0017】
本発明の黒鉛化品は、熱処理により形成されたメソカーボン小球体を含む易黒鉛化炭素材料に、有機溶媒を添加して、粘度が1〜100 mPa s となるように粘度調整後、ろ過によりメソカーボン小球体を分離し、得られたメソカーボン小球体を黒鉛化することにより製造することができる。前記の粘度はろ過時の粘度であり、100〜140℃において測定したものである。
[0017]
The graphitized article of the present invention is obtained by adding an organic solvent to a graphitizable carbon material containing mesocarbon microspheres formed by heat treatment, adjusting the viscosity to 1 to 100 mPa · s, and then filtering it. The mesocarbon microspheres can be separated by this method, and the resulting mesocarbon microspheres can be manufactured by graphitizing. The said viscosity is a viscosity at the time of filtration, and is measured at 100-140 degreeC.

【0020】
次に、生成したメソカーボン小球体を、易黒鉛化炭素材料から分離する。そのために、易黒鉛化炭素材料に有機溶媒を添加し、粘度が1〜100 mPa s 、好ましくは1.0〜50 mPa s になるように調整する。その際、必要に応じて、攪拌してもよい。なお、従来のメソカーボン小球体を含む易黒鉛化炭素材料の粘度は0.01 mPa s 程度であるが、これはろ過を容易に実施できることを考慮したものである。
有機溶媒としては、トルエン、n−ヘキサンなどの炭化水素、テトラヒドロフランなどのエーテル、アセトンなどのケトン、キノリンなどのピリジン類、タール軽油、タール重油などが挙げられるが、もちろん、これらに限定されるものではない。
[0020]
Next, the formed mesocarbon microspheres are separated from the graphitizable carbon material. To that end, an organic solvent is added to the graphitizable carbon material, and the viscosity is adjusted to 1 to 100 mPa · s , preferably 1.0 to 50 mPa · s . At that time, as needed, you may stir. In addition, although the viscosity of the graphitizable carbon material containing the conventional mesocarbon microsphere is about 0.01 mPa * s , this considers that filtration can be implemented easily.
Examples of organic solvents include toluene, hydrocarbons such as n-hexane, ethers such as tetrahydrofuran, ketones such as acetone, pyridines such as quinoline, tar light oil, tar heavy oil, etc. is not.

【0021】
粘度を調整されたメソカーボン小球体を含む易黒鉛化炭素材料から、ろ過により、メソカーボン小球体を分離する。このとき、粘度が100 mPa s より高いとろ過が困難になり、また粘度が mPa s より低くなるとメソカーボン小球体の表面にメソカーボン小球体以外の易黒鉛化炭素材料であるピッチ成分などが大量に付着し、負極材料として用いた場合には放電容量が低く、さらに充放電ロスが増大する。前記粘度範囲でろ過することにより、メソカーボン小球体以外の易黒鉛化炭素材料と、添加した有機溶剤は同時に除去され、メソカーボン小球体を分離することができる。
[0021]
The mesocarbon microspheres are separated by filtration from the graphitizable carbon material containing mesocarbon microspheres having adjusted viscosity. At this time, when the viscosity is higher than 100 mPa · s , the filtration becomes difficult, and when the viscosity becomes lower than 1 mPa · s , the pitch component which is a graphitizable carbon material other than mesocarbon small spheres on the surface of mesocarbon small spheres. Etc., when used as a negative electrode material, the discharge capacity is low, and the charge / discharge loss further increases. By filtering in the viscosity range, the graphitizable carbon material other than the mesocarbon microspheres and the added organic solvent can be simultaneously removed to separate the mesocarbon microspheres.

【0047】
以下、本発明の実施例および比較例により、本発明を具体的に説明するが、本発明はこれらの実施例に限定されるものではない。
(実施例1)
フリーカーボンを1質量%含有するコールタールピッチを450℃で30分間加熱し、コールタールピッチ中にメソカーボン小球体(平均粒径32μm)を35質量%生成させた。これに、タール中油(沸点:180〜300℃)を添加し、コールタールピッチの粘度を1.5 mPa s (125℃)に調整し、125℃で1時間攪拌し、メソカーボン小球体を含む易黒鉛化炭素材料を得た。これを125℃に保持したまま加圧ろ過器に注入し、窒素ガスで加圧してろ過し、メソカーボン小球体を分離した。メソカーボン小球体の含有量は、ろ布上に残ったメソカーボンと原料のコールタールピッチの質量比により算出した。また、メソカーボン小球体の平均粒径はレーザー回折式粒度分布計により測定した50%体積換算累計粒径である。
[0047]
EXAMPLES The present invention will be specifically described below by examples of the present invention and comparative examples, but the present invention is not limited to these examples.
Example 1
Coal tar pitch containing 1% by mass of free carbon was heated at 450 ° C. for 30 minutes to form 35% by mass of mesocarbon small spheres (average particle diameter 32 μm) in the coal tar pitch. To this, add an oil in tar (boiling point: 180-300 ° C), adjust the viscosity of coal tar pitch to 1.5 mPa · s (125 ° C), stir at 125 ° C for 1 hour, The graphitizable carbon material containing was obtained. It was injected into a pressure filter while maintaining it at 125 ° C., pressurized with nitrogen gas and filtered to separate mesocarbon microspheres. The content of mesocarbon microspheres was calculated by the mass ratio of mesocarbon remaining on the filter cloth to the raw material coal tar pitch. The average particle diameter of mesocarbon microspheres is a 50% volume-converted cumulative particle diameter measured by a laser diffraction particle size distribution analyzer.

【0055】
(比較例1)
フリーカーボンを0.5質量%含有するコールタールピッチを420℃で15分間加熱し、コールタールピッチ中にメソカーボン小球体(平均粒径19μm)を12質量%生成させた。これに、タール軽油(沸点:80〜120℃)を添加し、コールタールピッチの粘度を0.01 mPa s (125℃)に調整し、125℃で1時間攪拌し、メソカーボン小球体を含む易黒鉛化炭素材料を得た。これを125℃に保持したまま加圧ろ過器に注入し、窒素ガスで加圧してろ過し、メソカーボン小球体を分離した。
[0055]
(Comparative example 1)
A coal tar pitch containing 0.5% by mass of free carbon was heated at 420 ° C. for 15 minutes to generate 12% by mass of mesocarbon microspheres (average particle diameter 19 μm) in the coal tar pitch. To this, add tar light oil (boiling point: 80 to 120 ° C), adjust the viscosity of coal tar pitch to 0.01 mPa · s (125 ° C), stir at 125 ° C for 1 hour, and make meso carbon microspheres The graphitizable carbon material containing was obtained. It was injected into a pressure filter while maintaining it at 125 ° C., pressurized with nitrogen gas and filtered to separate mesocarbon microspheres.

【0070】
【表1】

Figure 2004083398
[0070]
[Table 1]
Figure 2004083398

Claims (1)

熱処理により形成されたメソカーボン小球体を含む易黒鉛化炭素材料に、有機溶媒を添加して、粘度が1〜100 mPa s となるように粘度調整後、ろ過によりメソカーボン小球体を分離し、得られたメソカーボン小球体を黒鉛化する多結晶メソカーボン小球体黒鉛化品の製造方法。An organic solvent is added to the graphitizable carbon material containing mesocarbon microspheres formed by heat treatment, the viscosity is adjusted so that the viscosity is 1 to 100 mPa · s, and the mesocarbon microspheres are separated by filtration. And a method for producing a polycrystalline mesocarbon microsphere graphitized article for graphitizing the obtained mesocarbon microsphere.
JP2003185105A 2002-06-27 2003-06-27 Method for producing polycrystalline mesocarbon microsphere graphitized product Expired - Lifetime JP4335596B2 (en)

Priority Applications (1)

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JP2002187804 2002-06-27
JP2003185105A JP4335596B2 (en) 2002-06-27 2003-06-27 Method for producing polycrystalline mesocarbon microsphere graphitized product

Related Child Applications (1)

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JP2009117562A Division JP5066132B2 (en) 2002-06-27 2009-05-14 Polycrystalline mesocarbon microsphere graphitized product, negative electrode active material, and lithium ion secondary battery

Publications (3)

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Publication number Priority date Publication date Assignee Title
JP2006228505A (en) * 2005-02-16 2006-08-31 Hitachi Chem Co Ltd Graphite particles for anode of lithium-ion secondary battery, its manufacturing method, as well as anode for lithium-ion secondary battery and lithium-ion secondary battery using the same
JP5021979B2 (en) * 2006-08-17 2012-09-12 Jfeケミカル株式会社 Mesocarbon microsphere graphitized material for lithium ion secondary battery negative electrode material and method for producing the same, lithium ion secondary battery negative electrode material, lithium ion secondary battery negative electrode and lithium ion secondary battery
CN111751311B (en) * 2020-07-03 2021-09-28 中南大学 Preparation method of graphite material for oxygen-nitrogen-hydrogen analyzer

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