Lithium ion battery and electrolyte thereof

A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries and their electrolytes, can solve the problems of non-negligible resistance, unobvious battery performance, and low battery discharge capacity, achieve superior low-temperature charge and discharge performance, and ensure high-temperature storage And the effect of circulation and other performance

Active Publication Date: 2013-05-15
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, through the impedance test, it is found that adding 1,3-propane sultone alone will increase the internal resistance of the battery, that is, the chemical film is not a perfect conduction of lithium ions, but has a certain resistance; at room temperature or high temperature enviro

Method used

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  • Lithium ion battery and electrolyte thereof
  • Lithium ion battery and electrolyte thereof
  • Lithium ion battery and electrolyte thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0056] Example 1

[0057] A Preparation of Electrolyte

[0058] The electrolyte was prepared in the same way as in Comparative Example 1, except that the electrolyte was ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and 1,3-propanesulfonic acid. Esters, 4-methyl ethylene sulfate were mixed in a weight ratio of 28.8:28.8:38.4:3:1, and 1M LiPF was dissolved 6 .

[0059] Preparation of B cells

[0060] Same as Comparative Example 1.

Example Embodiment

[0061] Example 2

[0062] A Preparation of Electrolyte

[0063] The electrolyte was prepared in the same way as in Comparative Example 1, except that the electrolyte was ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and 1,3-propanesulfonic acid. Esters, 4-methyl ethylene sulfate were mixed in a weight ratio of 28.5:28.5:38:3:2, and 1M LiPF6 was dissolved.

[0064] Preparation of B cells

[0065] Same as Comparative Example 1.

Example Embodiment

[0066] Example 3

[0067] A Preparation of Electrolyte

[0068] The electrolyte was prepared in the same manner as in Comparative Example 1, except that the electrolyte was ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), 4-methyl ethylene sulfate , ethylene sulfate was mixed in a weight ratio of 28.8:28.8:38.4:1:3, and 1M LiPF was dissolved 6 .

[0069] Preparation of B cells

[0070] Same as Comparative Example 1.

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Abstract

The invention provides a lithium ion battery and electrolyte thereof. The electrolyte of the lithium ion battery comprises a non-aqueous solvent, lithium salt dissolved in the non-aqueous solvent, cyclic sulfate or sulphonate without a branched chain, and cyclic sulfate with a branched chain. The lithium ion battery comprises a positive plate, a negative plate, a diaphragm arranged between the positive plate and the negative plate, and the electrolyte. The lithium ion battery and the electrolyte thereof have excellent low-temperature charge and discharge performance, and the quite high-temperature storage, circulation and other performances can be guaranteed.

Description

technical field [0001] The invention relates to a secondary battery, in particular to a lithium ion battery and its electrolyte. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high energy density, long cycle life, no memory effect, and environmental friendliness. Now they have become the main power source of mobile electronic products, and they have also shown strong potential in the fields of electric vehicles, military industry, and aerospace. Application prospect. [0003] In order to improve the cycle life of lithium-ion batteries, film-forming additives are usually added to the electrolyte. It is hoped that the film-forming additives can form a dense and stable chemical film on the electrode surface. Since this layer of chemical film can block the migration of electrons between the electrode and the electrolyte, it can inhibit the side reactions between them, slow down the aging of the battery, and prolong the service l...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/0567
CPCY02E60/122Y02E60/10
Inventor 任建勋付成华赵丰刚褚春波
Owner NINGDE AMPEREX TECH
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