TOP > 外国特許検索 > POSITIVE ELECTRODE FOR LITHIUM-ION RECHARGEABLE BATTERY, LITHIUM-ION RECHARGEABLE BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE FOR LITHIUM-ION RECHARGEABLE BATTERY

POSITIVE ELECTRODE FOR LITHIUM-ION RECHARGEABLE BATTERY, LITHIUM-ION RECHARGEABLE BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE FOR LITHIUM-ION RECHARGEABLE BATTERY

外国特許コード F200010213
整理番号 (N18035)
掲載日 2020年8月4日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2019JP045732
国際公開番号 WO 2020105729
国際出願日 令和元年11月22日(2019.11.22)
国際公開日 令和2年5月28日(2020.5.28)
優先権データ
  • 特願2018-219707 (2018.11.22) JP
発明の名称 (英語) POSITIVE ELECTRODE FOR LITHIUM-ION RECHARGEABLE BATTERY, LITHIUM-ION RECHARGEABLE BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE FOR LITHIUM-ION RECHARGEABLE BATTERY
発明の概要(英語) Provided is a lithium-ion rechargeable battery which combines excellent electrical conductivity and adhesion of the electrode active material with respect to the collector, and which can dramatically improve battery characteristics compared to the prior art. This positive electrode for lithium-ion rechargeable battery comprises a collector and an electrode active material-containing layer provided on the collector. The electrode active material-containing layer contains active material particles and an electroconductive material which connects active material particles. The mass ratio of active material particles:electroconductive material:other components in the electrode active material-containing layer is 95-99.7:0.3-5:0-1. The electroconductive material contains a first long carbon material having a first length, and a second long carbon material having a second length which is greater than the first length. The ratio of the second length with respect to the first length falls within the range of 2 to 50, inclusive.
従来技術、競合技術の概要(英語) BACKGROUND ART
In recent years, performance of the mobile device, a built-in lithium ion secondary battery of high output, high energy density is demanded. The lithium ion secondary battery positive electrode, negative electrode, electrolyte, and separator and the configuration, the output of the batteries is high, the resistance of the components is required. Of the main target can be a low resistance, since the positive and negative electrodes, electrode active material particles constituting the powder, the conductive material, binder, and a current collector to materials such as have been made various studies.
Conventional, lithium ion secondary battery for making the electrode, the slurry for electrode formation of the non-aqueous solvent is applied onto the current collector, drying, through mechanical bonding, the electrode active material containing layer formed on the current collector employed is a method. For example, to Patent Document 1, fluorine-containing cyclic carbonate and 15-40 volume %, the fluorine-containing chain carbonate and/or fluorine-containing chain ether that contain a total of 45-85 volume %, the content of the fluorine-free cyclic carbonate in the nonaqueous solvent to 10 volume % or less, and the non-aqueous electrolyte including lithium salt, manganese-containing composite oxide as the active material containing a positive electrode, and a lithium ion secondary battery is provided. Patent Document 1 is, on one side of a current collector made of an aluminum foil, such as polyvinylidene fluoride (PVDF) binder of the slurry for the positive electrode is coated by a bar coater, the positive electrode slurry is coated and dried current collector, the positive electrode sheet obtained in the compression molding using a roll press, and then drying in, to obtain a positive electrode.
In addition, without using any binder in the electrode current collector an electrode active material particle powder has been made an attempt on the processing. Patent Document 2 is, as the positive electrode active material for a positive electrode the metal complex crosslinking cyano prussian blue type of the current collector and electrolytic deposition on the metal surface, and a thin-film electrode is provided.
On the other hand, a binder and a current collector without using a metal, a plurality of fibers of the electrode active material powder of the network technique is also fixed. Non-Patent Document 1 is for example, fiber diameter 11nm, fiber length 370μm of carbon nanotubes, and the ultrasonic electrode active material particle powder is dispersed in the solvent, filtration, and drying the solution obtained, and a nonwoven fabric-like electrode is provided.
However, in the technique of Patent Document 1, during of the material constituting the electrodes used for the insulating binder, and the resistance is unavoidable, the binder is not used, a current collector and active material particles was a problem that the adhesion is insufficient. In addition, the technique of Patent Document 2, for the electrolytic deposition of the high cost, in addition, the active material for a thin-film form may be provided on the electrode cannot be increased, the energy density of the problem is not raised. In the technique of Non-Patent Document 3, filtering devices of the filter cake was dried, and retrieving the manufacturing method of the invention as an electrode, a large amount of high-area electrode is a problem that it is difficult. In addition, in order to ensure the conductivity of the obtained non-woven fabric bonded to the support electrodes and the metal case, so as to be crimped are mechanically interconnected, the joining strength is not sufficiently obtained. Therefore, sufficient battery characteristics can be obtained is far.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • SHINSHU UNIVERSITY
  • 発明者(英語)
  • ZETTSU Nobuyuki
  • TESHIMA Katsuya
  • KIM Daewook
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
ライセンスをご希望の方、特許の内容に興味を持たれた方は、下記「問合せ先」まで直接お問い合わせください。

PAGE TOP

close
close
close
close
close
close