Non-aqueous electrolyte of lithium ion battery and lithium ion battery

A lithium-ion battery and non-aqueous electrolyte technology, which is applied in the field of lithium-ion battery non-aqueous electrolyte and lithium-ion batteries, can solve problems such as unstable phosphate compounds containing double bonds, electrolyte gas swelling, and potential safety hazards. Achieve good high-temperature storage performance and high-temperature cycle performance, prevent oxidation and decomposition, and inhibit dissolution

Inactive Publication Date: 2015-01-21
SHENZHEN CAPCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent application number 201310046105.6 discloses an electrolyte solution containing a double bond-containing phosphate compound, which can effectively improve the high-temperature storage and cycle performance of the battery. Unstable in electrolytes, especially allyl-containing phosphate compounds, whose content in the electrolyte decreases over time, which leads to unguaranteed batter

Method used

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  • Non-aqueous electrolyte of lithium ion battery and lithium ion battery
  • Non-aqueous electrolyte of lithium ion battery and lithium ion battery
  • Non-aqueous electrolyte of lithium ion battery and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Preparation of electrolyte

[0039] Ethylene carbonate (EC), diethyl carbonate (DEC) and ethyl methyl carbonate (EMC) are mixed according to the mass ratio EC:DEC:EMC=1:1:1, and then lithium hexafluorophosphate (LiPF 6 ) To a molar concentration of 1 mol / L, and then add 0.5% of compound 1 based on the total mass of the electrolyte (compound 1 and compound 2 referred to in the specific embodiment...refer to the corresponding numbers listed in Table 1 Compound, the same applies to the following examples) phosphate compound.

[0040] 2) Preparation of positive plate

[0041] Mixed cathode active material lithium nickel cobalt manganese oxide LiNi in a mass ratio of 93:4:3 0.5 Co 0.2 Mn 0.3 O 2 , Conductive carbon black Super-P and binder polyvinylidene fluoride (PVDF), and then disperse them in N-methyl-2-pyrrolidone (NMP) to obtain positive electrode slurry. The slurry is evenly coated on both sides of the aluminum foil, dried, calendered and vacuum dried, and then the alumi...

Embodiment 2

[0058] Except that 0.5% of compound 1 is replaced with 0.5% of compound 2 in the preparation of the electrolyte, the rest is the same as in Example 1. The measured data of normal temperature cycle, high temperature cycle and high temperature storage are shown in Table 2.

Embodiment 3

[0060] Except that 0.5% of compound 1 is replaced with 0.5% of compound 4 in the preparation of the electrolyte, the rest is the same as in Example 1. The measured data of normal temperature cycle, high temperature cycle and high temperature storage are shown in Table 2.

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Abstract

The invention relates to non-aqueous electrolyte of a lithium ion battery. The non-aqueous electrolyte comprises an organic solvent, lithium salt and a phosphate-ester type compound. The invention also discloses the lithium ion battery. The non-aqueous electrolyte has the beneficial effect that the high-temperature storage performance and the circulating performance of the battery are improved.

Description

Technical field [0001] The present invention relates to a battery electrolyte and a battery using the electrolyte, in particular to a lithium ion battery non-aqueous electrolyte and a lithium ion battery. Background technique [0002] In recent years, with the development of electronic technology and market demand, consumers have put forward higher requirements for the volume, weight, function and service life of portable electronic products such as cameras, digital video cameras, mobile phones, and notebook computers. Therefore, the development of power products that are compatible with portable electronic products, especially the development of secondary batteries with high energy density, long life and high safety, is an urgent need for industry development. [0003] Compared with lead-acid batteries, nickel-cadmium batteries, and nickel-hydrogen batteries, lithium-ion batteries are widely used in portable electronic products because of their high energy density, high working vo...

Claims

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Application Information

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IPC IPC(8): H01M10/056H01M10/0525
CPCH01M10/0525H01M10/056H01M2220/30H01M10/0567Y02E60/10
Inventor 石桥胡时光
Owner SHENZHEN CAPCHEM TECH
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