US 2026/0018658 A1 · ELECTROLYTE, SODIUM SECONDARY BATTERY AND ELECTRIC DEVICE

Abstract

An electrolyte, a sodium secondary battery and an electric device. The electrolyte comprises a first sodium salt and a first solvent, wherein the first sodium salt comprises sodium trifluoromethanesulfonate, and the first solvent has a structure as shown in formula I, with the mass ratio of the first sodium salt to the first solvent being 0.01-0.4. The electrolyte has a good low-temperature ionic conductivity, which is beneficial for improving the low-temperature cycling performance and low-temperature coulombic efficiency of the battery.

Claims16

Dependent claims

An electrolytic solution for a sodium secondary battery, comprising a first sodium salt and a first solvent, the first sodium salt comprising sodium trifluoromethanesulfonate, and the first solvent having a structure represented by formula I:

wherein, R1 and R2 each independently comprise CH2 or CH2CH2, and n=1, 2, 3, or 4;
a mass ratio of the first sodium salt to the first solvent is 0.01-0.4.

Dependencies are inferred from the claim text.

Facts

Application

19/335,009Filed 22 Sep 2025

Priority

CN 202310799078.330 Jun 2023

Published

15 Jan 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01M 4/625
Electric conductive fillers: carbon or graphite
H01M 10/054
Accumulators with non-aqueous electrolyte: accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
H01M 4/0404
Methods of deposition of the material: by coating on electrode collectors
H01M 4/663
Selection of materials: containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres

Electrolyte, sodium secondary battery and electric device

Life of this patent

Electrolyte, sodium secondary battery and electric device

Life of this patent

Abstract

Claims16