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  • 专利标题:   Positive electrode for lithium secondary battery, comprises positive current collector, and positive electrode mixture layer containing positive electrode active material, positive electrode additive, conductive material and binder.
  • 专利号:   WO2022255818-A1, KR2022164093-A, EP4160725-A1, CN115997299-A
  • 发明人:   JO C H, JUNG W M, KIM H H, YOO T G, HWANG J T, JUNG H J, HEO J W, KIM H, JUNGHAEJUNG, HUR J U, HEO J, JUNG H, HUANG J, LIU T, ZHENG W, ZHAO Z
  • 专利权人:   LG ENERGY SOLUTION LTD, LG ENERGY SOLUTION LTD
  • 国际专利分类:   H01M010/052, H01M004/131, H01M004/1391, H01M004/36, H01M004/38, H01M004/505, H01M004/525, H01M004/587, H01M004/62, H01M004/02, H01M004/48
  • 专利详细信息:   WO2022255818-A1 08 Dec 2022 H01M-004/131 202203 Pages: 27
  • 申请详细信息:   WO2022255818-A1 WOKR007848 02 Jun 2022
  • 优先权号:   KR071877, CN80005150

▎ 摘　　要

NOVELTY - A positive electrode comprises positive current collector, and a positive electrode mixture layer arranged on the positive electrode current collector and containing a positive electrode active material, a positive electrode additive, a conductive material and a binder. The positive electrode additive is lithium-cobalt-metal oxide based compound. The ratio between the electrode sheet resistance (Rlco) when the positive electrode mixture layer does not contain the positive electrode additive and the electrode sheet resistance (R0) when the positive electrode mixture layer contains the positive electrode additive is 1.55 or less. USE - Positive electrode for lithium secondary battery (claimed). ADVANTAGE - The positive electrode provides a battery having excellent electrical performance, excellent safety and excellent charging and discharging efficiency. DETAILED DESCRIPTION - A positive electrode comprises positive current collector, and a positive electrode mixture layer arranged on the positive electrode current collector and containing a positive electrode active material, a positive electrode additive, a conductive material and a binder. The positive electrode additive is lithium-cobalt-metal oxide based compound of formula: LipCo(1-q)M1qO4, M1is tungsten, copper, iron, vanadium, chromium, titanium, zirconium, zinc, aluminum, indium, tantalum, yttrium, lanthanum, strontium, gallium, scandium, gadolinium, samarium, calcium, cerium, niobium, magnesium, boron, and/or molybdenum, p is 5-7 and q is 0-0.5. The ratio between the electrode sheet resistance (Rlco) when the positive electrode mixture layer does not contain the positive electrode additive and the electrode sheet resistance (R0) when the positive electrode mixture layer contains the positive electrode additive is 1.55 or less. INDEPENDENT CLAIMS are included for the following: manufacture of the positive electrode; and lithium secondary battery, which comprises the positive electrode, negative electrode and a separator positioned between the positive electrode and the negative electrode.