Positive electrode active material, positive electrode sheet and lithium ion secondary battery

A technology of positive electrode active materials and secondary particles, applied in secondary batteries, active material electrodes, positive electrodes, etc., can solve the problems of poor high-temperature cycle performance of lithium-ion secondary batteries, and achieve improved structural stability and high-temperature cycle stability performance, improve deformation resistance, and prevent cracking
CN112447939BActive Publication Date: 2022-03-15CONTEMPORARY AMPEREX TECH CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECH CO
Publication Date
2022-03-15

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Abstract

The invention discloses a positive electrode active material, a positive electrode sheet and a lithium ion secondary battery. The positive electrode active material includes secondary particles formed by gathering primary particles, the primary particles are lithium transition metal oxides, and the lithium transition metal oxides The transition metal sites include nickel and doping elements; and the Young's modulus E of the primary particles is 175GPa≤E≤220GPa. By adopting the cathode active material provided by the invention, the lithium-ion secondary battery can simultaneously take into account higher energy density and high-temperature cycle performance.
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Description

Technical field

[0001] The invention belongs to the technical field of secondary battery, and more particularly to a positive electrode active material, a positive electrode plate, and a lithium ion secondary battery. Background technique

[0002] The lithium ion secondary battery is a rechargeable battery, which relies mainly on the movement between the lithium ions between the positive and negative electrodes, and is the current cleaning energy currently widely used. The positive electrode active material is an important part of the lithium ion secondary battery, providing a battery charge and discharge process to lithium ions that are positive and negative reciprocating movements, so the positive electrode active material is critical to the performance of the battery.

[0003] The lithium nickel-based positive electrode active material has a high theoretical capacity, and the lithium ion secondary battery using a lithium nickel-based positive electrode active material can expe...

Claims

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