LITHIUM SECONDARY BATTERY

Publication EP3584875A1 Kind: A1 Mar 18, 2026

Applicants

Panasonic Intellectual Property Management Co., Ltd.

Inventors

MIYAMAE, Ryohei, KANO, Akira, NAKURA, Kensuke

Abstract

A lithium secondary battery includes a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte having lithium-ion conductivity. The positive electrode contains a positive electrode active material containing lithium. The negative electrode faces the positive electrode. The separator is disposed between the positive and negative electrodes. The negative electrode includes a negative electrode current collector. The negative electrode current collector includes a layer and protrusions. The layer has a first surface on which lithium metal is deposited during charge. The protrusions protrude from the first surface. At least one of the protrusions includes a conductive material and an insulative material.

IPC Classifications

H01M 10/42 20060101AFI20251212BHEP H01M 10/052 20100101ALI20251212BHEP H01M 10/058 20100101ALI20251212BHEP H01M 4/66 20060101ALI20251212BHEP H01M 4/72 20060101ALI20251212BHEP H01M 4/62 20060101ALI20251212BHEP H01M 4/134 20100101ALI20251212BHEP H01M 4/02 20060101ALI20251212BHEP H01M 4/78 20060101ALN20251212BHEP H01M 4/80 20060101ALN20251212BHEP

Designated States

AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR

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