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New application of substituted silicon-based phosphate compound, electrolyte and lithium ion battery

A silicon-based phosphate and compound technology, applied in the field of lithium-ion batteries, can solve the problems of battery swelling, affecting the high-temperature performance of the battery, and increasing impedance, and achieve the effects of inhibiting gas production, improving battery cycle performance, and inhibiting dissolution.

Active Publication Date: 2021-06-29
GUANGZHOU TINCI MATERIALS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after adding fluoroethylene carbonate, the battery is prone to gas during high-temperature storage, which causes the battery to bulge and the impedance to increase, which seriously affects the high-temperature performance of the battery.

Method used

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  • New application of substituted silicon-based phosphate compound, electrolyte and lithium ion battery
  • New application of substituted silicon-based phosphate compound, electrolyte and lithium ion battery
  • New application of substituted silicon-based phosphate compound, electrolyte and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Preparation of the electrolyte: Mixed, mixed, mixed, mixed, mixed, mixed, mixed, mixed with EC: DEC: EMC = 20: 25: 32 by mass rattles of ethylene carbonate (EC), methyl carbonate (EMC). After adding 1 mol of hexafluorophosphate (LIPF 6 ), Adding compound 1 additives that account for 1% of the total amount of the electrolyte, accounting for 2% of the total mass of the electrolyte, and the total mass of the electrolytic solution, the total mass of the electrolyte 5 wt% fluorocarbonate (FEC) After stirring is uniform, the lithium ion battery electrolyte is obtained.

[0063] (2) Preparation of the positive electrode: Lithium nickel-manganese acid Trimage Lini 0.8 CO 0.1 Mn 0.1 O 2 , The conductive agent SuperP, adhesive PVDF and carbon nanotubes (CNT) are mixed with a mass ratio of 97.3: 1: 1.2: 0.5, and the lithium ion battery positive slurry is applied to the concentrated aluminum foil, Coating is 400g / m 2 After drying, the positive electrode sheet is obtained after th...

Embodiment 2

[0067] (1) Preparation of the electrolyte: Mixed, mixed, mixed, mixed, mixed, mixed, mixed, mixed with EC: DEC: EMC = 20: 25: 32 by mass rattles of ethylene carbonate (EC), methyl carbonate (EMC). After adding 1 mol of hexafluorophosphate (LIPF 6 ), Add 1% 1% of the total mass of the electrolytic solution, accounting for 2% of the total mass of the electrolyte, and the total mass of the electrolyte 5 wt% fluorocarbonate (FEC) After stirring is uniform, the lithium ion battery electrolyte is obtained.

[0068] (2) Preparation of the positive electrode: Lithium nickel-manganese acid Trimage Lini 0.8 CO 0.1 Mn 0.1 O 2 , The conductive agent SuperP, adhesive PVDF and carbon nanotubes (CNT) are mixed with a mass ratio of 97.3: 1: 1.2: 0.5, and the lithium ion battery positive slurry is applied to the concentrated aluminum foil, Coating is 400g / m 2 After drying, the positive electrode sheet is obtained after the rolling pressure is obtained, and the positive electrode sheet satisfied ...

Embodiment 3

[0072] (1) Preparation of the electrolyte: Mixed, mixed, mixed, mixed, mixed, mixed, mixed, mixed with EC: DEC: EMC = 20: 25: 32 by mass rattles of ethylene carbonate (EC), methyl carbonate (EMC). After adding 1 mol of hexafluorophosphate (LIPF 6 , Added 1% 1% of the total mass of the electrolytic solution, accounting for 2% of the total mass of the electrolytic solution, and the total mass of the electrolyte 5 wt% fluorocarbonate (FEC) After stirring is uniform, the lithium ion battery electrolyte is obtained.

[0073] (2) Preparation of the positive electrode: Lithium nickel-manganese acid Trimage Lini 0.8 CO 0.1 Mn 0.1 O 2 , The conductive agent SuperP, adhesive PVDF and carbon nanotubes (CNT) are mixed with a mass ratio of 97.3: 1: 1.2: 0.5, and the lithium ion battery positive slurry is applied to the concentrated aluminum foil, Coating is 400g / m 2 After drying, the positive electrode sheet is obtained after the rolling pressure is obtained, and the positive electrode sheet...

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Abstract

The invention relates to a new application of a substituted silicon-based phosphate compound with a structure as shown in a formula (I), an electrolyte and a lithium ion battery. As an electrolyte additive, the substituted silicon-based phosphate ester compound can inhibit gas swelling of a battery and reduce an impedance high-energy density system.

Description

Technical field [0001] The present invention relates to the field of lithium ion batteries, and in particular, to new uses and electrolytes, lithium ion batteries of the substituted silicon-phosphate compounds. Background technique [0002] The lithium-ion battery has the advantages of high operating voltage, high than energy density, long cycle life, low self-discharge rate, no memory effect, and small environmental pollution, has been widely used in various electronic consumer goods and power battery markets. With the wide application of lithium-ion batteries, consumers have continuously improved the use of lithium-ion batteries, while the battery life requirements are increasingly high, which requires a lithium-ion battery to have a higher energy density. [0003] In recent years, a lithium ion secondary battery having a higher energy density is being sought, as one of its methods, is a positive and negative electrode material using a height of the height. At present, the thre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/42H01M10/0525C07F9/09
CPCH01M10/0567H01M10/4235H01M10/0525C07F9/095H01M2300/0025Y02E60/10H01M10/0568H01M10/0569
Inventor 郑德培范伟贞信勇赵经纬
Owner GUANGZHOU TINCI MATERIALS TECH
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