US 2014/0272606 A1 · LITHIUM-ION SECONDARY BATTERY AND ELECTROLYTE THEREOF

Abstract

The present disclosure provides a lithium-ion secondary battery and an electrolyte thereof. The electrolyte comprises a lithium salt, a non-aqueous solvent, and an additive at least containing 1,3-propyl sultone (PS) and a compound of isocyanurate structure represented by formula (1), formula (2) or formula (3); in formula (1), n is a positive integer from 1 to 3; in formula (2), n is a positive integer from 1 to 3, R1 is an alkyl of linear chain or branched chain having carbon atoms from 1 to 6, hydrogen atoms in the alkyl can be substituted by fluorine atoms partly or wholly; in formula (3), n is a positive integer from 1 to 3, R1 and R2 are alkyls of linear chain or branched chain having carbon atoms from 1 to 6, hydrogen atoms in the alkyls can be substituted by fluorine atoms partly or wholly.

Claims20

Dependent claims

An electrolyte of a lithium-ion secondary battery, comprising:

a lithium salt and a non-aqueous solvent, and further comprising an additive at least containing 1,3-propyl sultone (PS) and a compound of isocyanurate structure, the compound of isocyanurate structure in the additive being represented by the following formula (1), formula (2) or formula (3);
in the formula (1), n being a positive integer from 1 to 3;
in the formula (2), n being a positive integer from 1 to 3, R1 being an alkyl of linear chain or branched chain having carbon atoms from 1 to 6, hydrogen atoms in the alkyl can being substituted by fluorine atoms partly or wholly;
in the formula (3), n being a positive integer from 1 to 3, R1 and R2 being alkyls of linear chain or branched chain having carbon atoms from 1 to 6, hydrogen atoms in the alkyls can being substituted by fluorine atoms partly or wholly.

1 more element

A lithium-ion secondary battery, comprising:

a positive electrode plate;
a negative electrode plate;
a separator interposed between the positive electrode plate and the negative electrode plate;
and
an electrolyte comprising:
a lithium salt and a non-aqueous solvent, and further comprising an additive at least containing 1,3-propyl sultone (PS) and a compound of isocyanurate structure, the compound of isocyanurate structure in the additive being represented by the following formula (1), formula (2) or formula (3);
in the formula (1), n being a positive integer from 1 to 3;
in the formula (2), n being a positive integer from 1 to 3, R1 being an alkyl of linear chain or branched chain having carbon atoms from 1 to 6, hydrogen atoms in the alkyl can being substituted by fluorine atoms partly or wholly;
in the formula (3), n being a positive integer from 1 to 3, R1 and R2 being alkyls of linear chain or branched chain having carbon atoms from 1 to 6, hydrogen atoms in the alkyls can being substituted by fluorine atoms partly or wholly.

6 more elements

Dependencies are inferred from the claim text.

Lithium-ion secondary battery and electrolyte thereof

Life of this patent

Lithium-ion secondary battery and electrolyte thereof

Life of this patent

Abstract

Claims20