Positive electrode, battery, battery pack, electronic device, electric vehicle, electricity storage device, and electric power system

• Main Authors: Hayashi, Naoki, Motohashi, Kazunari, Endoh, Kazuaki
• Format: Patent
• Language: English
• Published: 22.09.2020
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BASIC ELECTRIC ELEMENTS; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

A positive electrode contains a first active material and a second active material. The first active material and the second active material each contain a lithium composite oxide containing at least manganese (Mn), nickel (Ni), and cobalt (Co) as transition metals. The first active material has a particulate shape. An average porosity V1 in a particle of the first active material satisfies 10[%]≤V1≤30[%]. An average particle diameter D1 of the first active material satisfies 6 [μm]≤D1≤20 [μm]. The second active material has a particulate shape. An average porosity V2 in a particle of the second active material satisfies 0[%]≤V2≤10[%]. An average particle diameter D2 of the second active material satisfies 1 [μm]≤D2≤6 [μm].