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1. WO2020111222 - SECONDARY BATTERY

Publication Number WO/2020/111222
Publication Date 04.06.2020
International Application No. PCT/JP2019/046743
International Filing Date 29.11.2019
IPC
H01M 4/13 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
H01M 4/505 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
50of manganese
505of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
52of nickel, cobalt or iron
525of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/587 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
587for inserting or intercalating light metals
H01M 10/052 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
CPC
H01M 10/052
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
H01M 4/13
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
H01M 4/505
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
50of manganese
505of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
52of nickel, cobalt or iron
525of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/587
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
587for inserting or intercalating light metals
Applicants
  • 株式会社村田製作所 MURATA MANUFACTURING CO., LTD. [JP]/[JP]
Inventors
  • 北田 敬太郎 KITADA Keitaro
  • 佐藤 大 SATO Futoshi
  • 松井 貴昭 MATSUI Takaaki
  • 木暮 太一 KOGURE Taichi
  • 増子 彩 MASHIKO Aya
  • 清水 良史 SHIMIZU Yoshifumi
  • 本多 一輝 HONDA Kazuki
  • 平野 雄大 HIRANO Yuta
  • 畑ヶ 真次 HATAKE Shinji
  • 山川 直子 YAMAKAWA Naoko
  • 奥野 盛朗 OKUNO Moriaki
  • 宮本 昌泰 MIYAMOTO Masahiro
Agents
  • 特許業務法人つばさ国際特許事務所 TSUBASA PATENT PROFESSIONAL CORPORATION
Priority Data
2018-22593730.11.2018JP
2018-22593930.11.2018JP
2018-22594030.11.2018JP
2018-22594230.11.2018JP
2018-22594330.11.2018JP
2018-22594430.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) SECONDARY BATTERY
(FR) BATTERIE SECONDAIRE
(JA) 二次電池
Abstract
(EN)
A secondary battery comprises a positive electrode including a lithium cobalt composite oxide having a layered rock salt type crystal structure, a negative electrode including graphite, and an electrolytic solution. A state in which the battery is charged at a constant voltage for 24 hours at a closed circuit voltage of 4.38 V or more is defined as a fully charged state, and the open circuit potential (based on lithium metal) of the negative electrode measured in the fully charged state is 19-86 mV (inclusive). The maximum discharge capacity is defined as the discharge capacity obtained when a constant-current discharge is performed from the fully charged state until the closed circuit voltage reaches 3.00 V, and then after the constant-current discharge, constant-voltage discharge is performed at a closed circuit voltage of 3.00 V for 24 hours. The potential fluctuation amount of the negative electrode, when performing discharge from the fully charged state by a capacity corresponding to 1% of the maximum discharge capacity, is 1 mV or more.
(FR)
L’invention concerne une batterie secondaire qui comprend : une électrode positive incluant un oxyde composite de lithium et de cobalt ayant une structure de cristal de type sel gemme stratifié, une électrode négative incluant du graphite, et une solution électrolytique. Un état dans lequel la batterie est chargée à une tension constante durant 24 heures à une tension en circuit fermé supérieure ou égale à 4,38 V est défini en tant qu’état complètement chargé, et le potentiel en circuit ouvert (sur la base du lithium métallique) de l’électrode négative mesuré à l’état complètement chargé est compris entre 19 et 86 mV (inclus). La capacité de décharge maximale est définie comme étant la capacité de décharge obtenue lorsqu’une décharge à courant constant est effectuée depuis l’état complètement chargé jusqu’à ce que la tension en circuit fermé atteigne 3,00 V, et puis, après la décharge à courant constant, une décharge à tension constante est effectuée à une tension en circuit fermé de 3,00 V pendant 24 heures. La quantité de fluctuation de potentiel de l’électrode négative, lorsqu’on effectue une décharge depuis l’état complètement chargé par une capacité correspondant à 1 % de la capacité de décharge maximale, est supérieure ou égale à 1 mV.
(JA)
二次電池は、層状岩塩型の結晶構造を有するリチウムコバルト複合酸化物を含む正極と、黒鉛を含む負極と、電解液とを備える。4.38V以上の閉回路電圧において24時間に渡って定電圧充電された状態を満充電状態として、その満充電状態において測定される負極の開回路電位(リチウム金属基準)が19mV以上86mV以下である。満充電状態から閉回路電圧が3.00Vに到達するまで定電流放電されたのちに3.00Vの閉回路電圧において24時間に渡って定電圧放電された際に得られる放電容量を最大放電容量として、その最大放電容量の1%に相当する容量分だけ満充電状態から放電された際に、負極の電位変動量が1mV以上である。
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