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11. 发明专利

CA2173477A1 NON-AQUEOUS SOLVENT SECONDARY BATTERY ELECTRODE MATERIAL ANDPROCESS FOR PREPARING THE SAME 未知
公开(公告)号：CA2173477A1
公开(公告)日：1996-02-15
申请号：CA2173477
申请日：1995-07-31
申请人： MITSUBISHI CHEM CORP
发明人： HAYASHI MANABU , YAMAGUCHI SHOJI , MIZUTANI FUMIKAZU , NISHIOKA KEIKO , MORI SHOICHIRO
IPC分类号： C04B35/532 , H01M4/583 , H01M4/60 , H01M4/58
摘要： Disclosed are an electrode material for a non-aqueous solvent secondary battery, which comprises a composite carbonaceous material in which to the surface of a graphite carbonaceous material is attached a carbonized material of an organic substance in an amount to give a carbon residue of 12 parts by weight or less and 0.1 part by weight or more based on 100 parts by weight of the graphite carbonaceous material, and a process for preparing an electrode material for a non-aqueous solvent secondary battery, which comprises the steps of introducing a slurry obtained by adding an aromatic organic solvent to a mixture of graphite carbonaceous material particles and an organic substance and adjusting viscosity to 10000 cp or lower into a mixing and stirring apparatus having a reaction room which has a paddle rotatable by a shaft in an inner portion thereof, the inner wall surface of the reaction room being formed substantially along the outermost line of rotation of the paddle and also, being provided a mechanism of deaerating a solvent, heating it to a temperature of the boiling point of the solvent or higher and lower than 600 .degree.C while stirring to prepare a solid intermediate and heating said intermediate to 600 .degree.C or higher under inert gas atmosphere to effect carbonization. According to the non-aqueous solvent secondary battery electrode material of the present invention, there can be provided a non-aqueous solvent secondary battery in which good electric characteristics that while maintaining discharging capacity which is as high as graphite, irreversible capacity can be suppressed to extremely low and charging efficiency is excellent can be obtained and further stability to an electrolyte is improved. Also, according to the preparation process of the present invention, a composite carbonaceous material having such high characteristics and uniform characteristics can be prepared stably with good efficiency.

12. 发明专利

JPH1125979A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JPH1125979A
公开(公告)日：1999-01-29
申请号：JP18211797
申请日：1997-07-08
申请人： MITSUBISHI CHEM CORP
发明人： SATO HIDEJI , YAMAGUCHI SHOJI , SATO NARIAKI
IPC分类号： C01B31/04 , H01M4/587 , H01M10/05 , H01M10/0525 , H01M10/0566 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a negative electrode to realize a capacity close to a theoretical capacity of graphite, imparting Li/Li lithium doping and dedoping potential to the peak intensity (1A) of 1570 to 1620 cm in Raman spectrum analysis of 0.001 to 0.07, and the peak half width Δv of 1570 to 1620 cm of 14 to 22.

13. 发明专利

JPH10284080A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JPH10284080A
公开(公告)日：1998-10-23
申请号：JP2195298
申请日：1998-02-03
申请人： MITSUBISHI CHEM CORP
发明人： SATO HIDEJI , YAMAGUCHI SHOJI , NISHIOKA KEIKO
IPC分类号： C01B31/02 , H01M4/02 , H01M4/36 , H01M4/587 , H01M10/05 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide high efficiency in a first cycle and keep high capacity in quick charge/discharge by convering the surface of a graphitized carbonaceous material with a carbonizable organic material, baking, and crushing to form an amorphous carbon-converging graphitized carbonaceous material, and treating the carbonaceous material with an acidic or alkaline solution, and using the treated carbonaceous material in a negative electrode. SOLUTION: A graphitized carbonaceous material is covered with a carbonizable organic material, they are baked to carbonize the carbonizable organic material, then the baked material is crushed to particles having a mean particle size of 5-50 μm (preferably 20-25 μm). The particle obtained are dispersed in an acidic solution or an alkaline solution, stirred, shaken at a temperature of 20-150 deg.C during 0.5 hr.-1 week or treated by superimposing ultrasonic waves, washed with pure water to wash out the acidic solution or the alkaline solution attached to the particles, and dried at temperature of 350 deg.C or lower. Property capable of absorbing/releasing lithium ions is developed, lithium undoing potential of 0.5 V or lower to Li/Li is provided, and capacity exceeding the theoretical capacity of graphite is realized.

14. 发明专利

JPH09283142A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JPH09283142A
公开(公告)日：1997-10-31
申请号：JP9385696
申请日：1996-04-16
申请人： MITSUBISHI CHEM CORP
发明人： SATO HIDEJI , NISHIOKA KEIKO , YAMAGUCHI SHOJI
IPC分类号： C01B31/02 , H01M4/587 , H01M10/05 , H01M10/0525 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery at a high capacity and having high charging and discharging efficiency and excellent cycle characteristic by using the carbonaceous material, which is obtained by performing a specified treatment applied to the organic material, as a negative electrode. SOLUTION: Organic material such as ethylene heavy end tar to be obtained at the time of decomposition of naphtha is burned at 200 deg.C or more and less than 400 deg.C, desirably, for 0.1-5 hours in the inert gas atmosphere such as nitrogen, and after de-tarring and pitching are performed, it is burned at 400-950 deg.C, desirably, for 0.5-3 hours in the pressure reduction condition so as to obtain the carbonaceous material, and this carbonaceous material is used for negative electrode. As a carbonaceous material, amorphous carbon at 10 -10 Ω.cm of volume resistivity, at 1-100m /g of specific surface area and at 0.1-0.5 of H/C is desirable.

15. 发明专利

JPH09283140A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JPH09283140A
公开(公告)日：1997-10-31
申请号：JP9385496
申请日：1996-04-16
申请人： MITSUBISHI CHEM CORP
发明人： SATO HIDEJI , KAMEDA TAKASHI , YAMAGUCHI SHOJI
IPC分类号： C01B31/02 , H01M4/587 , H01M10/05 , H01M10/0525 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery at a high capacity and having excellent charging and discharging cycle characteristic by de-tarring and pitching the organic material within a specified temperature range so as to form a precursor of carbonaceous material, and crushing this precursor of carbonaceous material, and burning this precursor of carbonaceous material within a specified temperature range so as to form the carbonaceous material, and using this carbonaceous material as a negative electrode. SOLUTION: Organic material is de-tarred and pitched at 300-500 deg. C so as to form a precursor of carbonaceous material, and after crushing this precursor of carbonaceous material, this precursor of carbonaceous material is burned at 500-950 deg.C so as to form the carbonaceous material, and this carbonaceous material is used for a negative electrode. In a lithium secondary battery using this negative electrode, de-tarring capacity is large, and conductivity is improved by efficiently eliminating low-crystal parts inside the raw material, and discharging capacity, which naturally belongs to the carbonaceous material, can be efficiently brought out.

16. 发明专利

JPH09213328A ELECTRODE MATERIAL FOR NON-AQUEOUS SOLVENT SECONDARY BATTERY AND MANUFACTURE OF THE ELECTRODE MATERIAL 失效
公开(公告)号：JPH09213328A
公开(公告)日：1997-08-15
申请号：JP1747796
申请日：1996-02-02
申请人： MITSUBISHI CHEM CORP
发明人： HAYASHI MANABU , YAMAGUCHI SHOJI , MIZUTANI BUNICHI , SUGAWARA KEIKO , MORI SHOICHIRO
IPC分类号： H01M10/05 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M4/58
摘要： PROBLEM TO BE SOLVED: To provide a non-aqueous solvent secondary battery exerting a good electric performance, which has a high electric capacity and with which the retention can be suppressed low, by using an electrode material to which a carbonized material of an organic substance is attached, wherein the amount of carbonaceous residue lies in a specific range with respect to a graphite type carbonaceous material. SOLUTION: A carbonated material of an organic substance is provided such that the amount of carbonaceous residue is between 0.1-12 parts by weight with respect to 100 parts by wt. graphite type carbonaceous material and is attached to the surface of the graphite carbonaceous material so that a composite carbonaceous material is prepared which is used in an electrode for a non- aqueous solvent secondary battery. Thereby a non-aqueous solvent secondary battery is accomplished which retains a discharge capacity as high as of graphite, can suppress low the irreversible capacity, is excellent in the charging efficiency, and is equipped with an enhanced stability of electrolyte.

17. 发明专利

JPH08339805A MANUFACTURE OF NONAQUEOUS SOLVENT SECONDARY BATTERY ELECTRODE MATERIAL 失效
公开(公告)号：JPH08339805A
公开(公告)日：1996-12-24
申请号：JP14590795
申请日：1995-06-13
申请人： MITSUBISHI CHEM CORP
发明人： HAYASHI MANABU , YAMAGUCHI SHOJI , KAMEDA TAKASHI , CHIBA HIROMI , SUGAWARA KEIKO
IPC分类号： H01M10/05 , C01B31/02 , H01M4/587 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PURPOSE: To provide nonaqueous solvent secondary battery electrode material which is stable against electrolyte, has a large electrolyte capacity, is excellent in filling density performance to an electrode and charge and discharge cycle characteristics, and is applicable to quick charge and discharge by mixing carbon material and heavy oil so as to perform specified processing. CONSTITUTION: After carbon material (for example, artificial graphite powders) and heavy oil (for example, coal tar pitch) are mixed, this mixture is extrusion- molded into film-like so as to manufacture intermediate material which preferably is in a state that the particles of the carbon material are substantially arranged in parallel with a film plane. Next, after the intermediate material is heated at 500 to 3000 deg.C in an inert gas atmosphere or in a non-oxidizing atmosphere (for example, in N2 gas) so as to form carbonized material, the carbonized material is made into fine particles.

18. 发明专利

JPH08222218A MANUFACTURE OF POLYPHASE STRUCTURE CARBON ELECTRODE MATERIAL 失效
公开(公告)号：JPH08222218A
公开(公告)日：1996-08-30
申请号：JP2203795
申请日：1995-02-09
申请人： MITSUBISHI CHEM CORP
发明人： MIZUTANI BUNICHI , YAMAGUCHI SHOJI , HAYASHI MANABU , SUGAWARA KEIKO , KAMEDA TAKASHI , MORI SHOICHIRO
IPC分类号： H01M10/05 , C01B31/02 , H01M4/133 , H01M4/1393 , H01M4/36 , H01M4/96 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PURPOSE: To manufacture a carbon material having a polyphase structure suitable for the electrode material of a nonaqueous solvent secondary battery, efficiently without breaking the covering phase of the surface. CONSTITUTION: A carbon material with the d002 less than 0.345nm is covered by organic compound mainly of condensing polyciclic compound. After that, a carbon material obtained by heat processing at 100 deg.C to 1800 deg.C is baked at 700 deg.C to 1800 deg.C while giving a rotating movement under an inactive gas ambiance.

19. 发明专利

JPH10330107A PRODUCTION OF HIGHLY PACKABLE CARBONACEOUS POWDER 失效
公开(公告)号：JPH10330107A
公开(公告)日：1998-12-15
申请号：JP14150297
申请日：1997-05-30
申请人： MITSUBISHI CHEM CORP
发明人： HAYASHI MANABU , YAMAGUCHI SHOJI , NISHIOKA KEIKO , FUJII HIROMI , KAMEDA TAKASHI
IPC分类号： C01B31/02 , C01B31/04 , H01M4/133 , H01M4/583 , H01M4/58
摘要： PROBLEM TO BE SOLVED: To obtain compact carbonaceous powder excellent in packability by imparting a dynamic energy to carbonaceous powder to specify an apparent density ratio and a median diameter ratio between the non-treated powder and the treated powder. SOLUTION: Carbonaceous powder having an interlayer distance (d002 ) of =10 nm is charged into a mixing device and ground by the application of a dynamic energy so as to give an apparent density ratio of >=1.1 and a median diameter ratio of >=1 between the non-treated powder and the treated powder. Thus, the highly packable carbonaceous powder having a median diameter of 5-50 μm and a BET method specific surface area of /g is obtained. The mixing device has a shaft and plural plow-like or saw tooth-like paddles fixed to the shaft in the device. The paddles form plural treating chambers in various phases. The inner wall surface of the device is formed in a cylindrical shape along the outermost line of the rotation of the paddles, and the space between the inner wall surface and the outermost line is minimized. The plural paddles are disposed on the shaft in its axial direction. One or plural screw type crushing blades capable of being rotated at a high rotation rate are disposed in one or many stages on the inner wall surface.

20. 发明专利

JP2001313031A ANODE ACTIVE MATERIAL FOR NONAQUEOUS SECONDARY CELL AND MANUFACTURING METHOD OF THE SAME, AND NONAQUEOUS SECONDARY CELL 失效
公开(公告)号：JP2001313031A
公开(公告)日：2001-11-09
申请号：JP2000127042
申请日：2000-04-27
申请人： MITSUBISHI CHEM CORP
发明人： YAMAGUCHI SHOJI , KATO AKIO , OKANISHI KENGO
IPC分类号： H01M10/05 , H01M4/02 , H01M4/36 , H01M4/587 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a nonaqueous secondary cell with high capacity, small deterioration of capacity due to repetitive charging and discharging, and also small deterioration of capacity at heavy load. SOLUTION: The nonaqueous secondary cell uses the anode active material for the nonaqueous secondary cell which is the mixture of the first carbonaceous fine powder covered with the second carbonaceous material layer, a graphitic fine powder covered with the second carbonaceous material layer, and an aggregational fine powder of the first carbonaceous fine powder and the graphitic fine powder which are bound with the second carbonaceous material.

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