Prelithiation lithium ion start-stop power supply and preparation method thereof

A lithium-ion, pre-lithiation technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of poor low-temperature performance and low charge-discharge times, and achieve the effects of low cost, high low-temperature performance, and simple process

Inactive Publication Date: 2018-11-06
洲际高能科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the defects of the existing lithium-ion start-stop power supply, such as specific energy, specific power, low charge and discharge times, and poor low-temperature performance, thereby providing a lithium-ion start-stop power supply that can be pre-lithiated and its Preparation method, the lithium-ion start-stop power supply prepared according to the method of the present invention has high power, high first-time efficiency and good low-temperature characteristics

Method used

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  • Prelithiation lithium ion start-stop power supply and preparation method thereof
  • Prelithiation lithium ion start-stop power supply and preparation method thereof
  • Prelithiation lithium ion start-stop power supply and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Will Li 2 O and Fe 2 o 3 According to the molar ratio of 5:1, it was mechanically mixed, pressed into pellets, and sintered at 850 °C for 20 hours to obtain Li 5 FeO 4 Material. After that, the LiNi 0.6 co 0.2 mn 0.2 o 2 (purchased from Beijing Dangsheng Material Technology Co., Ltd., China) and obtained Li 5 FeO 4 material, in a dry environment, according to the mass ratio of LiNi 0.6 co 0.2 mn 0.2 o 2 : Li 5 FeO 4= 9:1 mixed with zirconia balls and put them into a ball milling tank lined with zirconia material according to the weight ratio of balls to materials of 60:1, dry ball milling at a speed of 500rmp / min for 8 hours, and then Sieve to get LiNi 0.6 co 0.2 mn 0.2 o 2 / Li 5 FeO 4 composite material.

[0044] Will get LiNi 0.6 co 0.2 mn 0.2 o 2 / Li 5 FeO 4 The composite material, PVDF and carbon black were mixed uniformly at a mass ratio of 92:5:3, and then NMP solvent was added at a solid content of 50% and stirred for 3.5 hours. The ob...

Embodiment 2

[0050] Will Li 2 O and Fe 2 o 3 According to the molar ratio of 5:1, it was mechanically mixed, pressed into tablets, and sintered at 900 °C for 25 hours to obtain Li 5 FeO 4 Material. After that, the LiNi 0.5 co 0.2 mn 0.3 o 2 (purchased from Beijing Dangsheng Material Technology Co., Ltd., China) and obtained Li 5 FeO 4 material, in a dry environment, according to the mass ratio of LiNi 0.5 co 0.2 mn 0.3 o 2 : Li 5 FeO 4 =9.8:0.2, mixed with zirconia balls according to the weight ratio of 60:1 balls into a ball milling tank lined with zirconia materials, dry ball milling at a speed of 600rmp / min for 13 hours, and then Sieve to get LiNi 0.5 co 0.2 mn 0.3 o 2 / Li 5 FeO 4 composite material.

[0051] Will get LiNi 0.5 co 0.2 mn 0.3 o 2 / Li 5 FeO 4 Composite material, PVDF and carbon black were mixed evenly at a mass ratio of 85:5:10, and then NMP solvent was added at a solid content of 70% and stirred for 5 hours. The resulting slurry was evenly coat...

Embodiment 3

[0057] Will Li 2 O and Fe 2 o 3 Mechanically mixed at a molar ratio of 5:1, pressed into pellets, and sintered at 700 °C for 15 hours to obtain Li 5 FeO 4 Material. After that, the LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 (purchased from Beijing Dangsheng Material Technology Co., Ltd., China) and obtained Li 5 FeO 4 material, in a dry environment, according to the mass ratio of LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 : Li 5 FeO 4 = 9:1 mixed with zirconia balls in a ball milling tank lined with zirconia material at a weight ratio of 60:1, dry ball milling at a speed of 300rmp / min for 2 hours, and then Sieve to get LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 / Li 5 FeO 4 composite material.

[0058] Will get LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 / Li 5 FeO 4 Composite material, PVDF, carbon black and conductive graphite were mixed evenly at a mass ratio of 98:1:1, and then NMP solvent was added at a solid content of 40% and stirred for 2 hours. The resulting slurry was evenly coated on double-sided aluminu...

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PUM

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Abstract

The invention discloses a prelithiation lithium ion start-stop power supply. The power supply comprises a positive electrode and a negative electrode. The positive electrode is mainly made of a LiNixCoyMnzO2/Li5FeO4 composite material, wherein x+y+z=1. A preparation method of the prelithiation lithium ion start-stop power supply is also provided. The preparation includes the steps of preparing theLiNixCoyMnzO2/Li5FeO4 composite material, preparing the positive electrode and the negative electrode of the power supply and assembling the positive electrode and the negative electrode into the lithium ion start-stop power supply. The start-stop power supply obtained by the preparation method has good specific energy, specific power, charge and discharge cycles and low temperature performance,and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion start-stop power supply, and in particular relates to a lithium-ion start-stop power supply capable of prelithiation and a preparation method thereof. Background technique [0002] A few days ago, the European Commission announced that it plans to reduce the carbon dioxide emissions of new vehicles in the EU by 30% from 2021 to 2030. The EU's current new vehicle emission regulations will expire in 2021. According to this regulation, the carbon dioxide emissions of new vehicles in the EU must be reduced to 95 grams per kilometer; the United States must reduce carbon dioxide emissions to 97 grams per kilometer by 2025; down to 122 grams. my country's "Energy Saving and New Energy Automobile Industry Development Plan (2012-2020)" clearly states that by 2020, the average fuel consumption of traditional fuel passenger cars will drop to 5.0L / 100km, and the average fuel consumption of new energy-sav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525H01M10/42
CPCH01M4/364H01M4/505H01M4/525H01M10/0525H01M10/42Y02E60/10
Inventor 陈忠伟余爱萍毛治宇熊俊威黄明
Owner 洲际高能科技(北京)有限公司
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