Sekundärbatterie, Batteriepack und Fahrzeug

Details

Veröffentlichungs-Nr.

EP4715886

Anmeldetag

30. Juli 2025

Veröffentlichung

25. März 2026

Rechtsraum

EP

Abstract

In general, according to an approach, a secondary battery (100) includes a positive electrode (5), a negative electrode (3), and an electrolyte. The negative electrode (3) contains a niobium-containing oxide. In hard X-ray photoelectron spectroscopy on a surface of the negative electrode, a ratio B/A of an area B in a range of 680 eV or more and 695 eV or less to an area A in a range of 200 eV or more and 215 eV or less is 1.1 or more and 4.3 or less. The electrolyte contains a lithium salt and a first carboxylate ester. A content of the first carboxylate ester is 70 mass% or more and 95 mass% or less with respect to 100 mass% of the electrolyte excluding the lithium salt.

Anmelder

Firma

Kabushiki Kaisha Toshiba

Land

🇯🇵 Japan