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Lithium titanate composite material and manufacturing method thereof and lithium ion battery

A technology of lithium ion battery and composite material, applied in the field of lithium titanate composite material and its preparation, can solve the problems of rapid capacity decay of lithium ion battery, gassing of lithium ion battery, poor electronic conductivity, etc. Cycle stability and life, the effect of simple production method

Active Publication Date: 2017-11-07
微宏先进材料公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, Li 4 Ti 5 o 12 It is an insulator material with poor electronic conductivity. When charging and discharging at a high rate, the capacity of the lithium-ion battery decays rapidly, and as the number of charging and discharging increases, the lithium-ion battery will appear gassing.
Moreover, under high temperature conditions, as the number of charge and discharge increases, the lithium-ion battery gasses faster, which makes the capacity of the battery drop rapidly.

Method used

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  • Lithium titanate composite material and manufacturing method thereof and lithium ion battery
  • Lithium titanate composite material and manufacturing method thereof and lithium ion battery
  • Lithium titanate composite material and manufacturing method thereof and lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Weigh 1280.4g of LiOH·H with a purity of 98% 2 O and 3000g of TiO with a purity of 99.5% 2 Mix and add 3L of deionized water and stir evenly, then add 214.8g of Ba(OH) with a purity of 98% 2 ·8H 2 O, after continuing to stir for 5h, a mixed slurry was obtained. After that, the prepared mixed slurry is spray-dried and sintered at 750° C. for 5 hours to obtain a lithium titanate composite material, which can be directly used as a negative electrode material of a lithium-ion battery. In this example, the lithium titanate composite material Ba x Li 4 Ti 5 o 12+x , where x=0.09. If Ba is calculated as BaO, the content of BaO is 3% based on the mass percentage of BaO in LTO.

[0046] Weigh 1.2g of the above-mentioned lithium titanate composite material, add a certain proportion of conductive agent, binder and N-methyl-2-pyrrolidone (N-methyl-2-pyrrolidone, NMP), use a planetary ball mill for ball milling for 4 hours, after ball milling The obtained lithium titanate c...

Embodiment 2

[0048] Weigh 1280.4g of LiOH·H with a purity of 98% 2 O and 3000g of TiO with a purity of 99.5% 2 Mix and add 3L of deionized water and stir evenly, then add 143.2g of Ba(OH) with a purity of 98% 2 ·8H 2 O, after continuing to stir for 5h, a mixed slurry was obtained. After that, the prepared mixed slurry is spray-dried and sintered at 750° C. for 5 hours to obtain a lithium titanate composite material, which can be directly used as a negative electrode material of a lithium-ion battery. In this example, the lithium titanate composite material Ba x Li 4 Ti 5 o 12+x , where x=0.06. If Ba is calculated as BaO, the content of BaO is 2% based on the mass percentage of BaO in LTO.

[0049] Weigh 1.2g of the above-mentioned lithium titanate composite material, add a certain proportion of conductive agent, binder and N-methyl-2-pyrrolidone (N-methyl-2-pyrrolidone, NMP), use a planetary ball mill for ball milling for 4 hours, after ball milling The obtained lithium titanate c...

Embodiment 3

[0051] Weigh 1280.4g of LiOH·H with a purity of 98% 2 O and 3000g of TiO with a purity of 99.5% 2 Mix and add 3L of deionized water and stir evenly, then add 71.6g of Ba(OH) with a purity of 98% 2 ·8H 2 O, after continuing to stir for 5h, a mixed slurry was obtained. After that, the prepared mixed slurry is spray-dried and sintered at 750° C. for 5 hours to obtain a lithium titanate composite material, which can be directly used as a negative electrode material of a lithium-ion battery. In this example, the lithium titanate composite material Ba x Li 4 Ti 5 o 12+x , where x=0.03. If Ba is calculated as BaO, the content of BaO is 1% based on the mass percentage of BaO in LTO.

[0052] Weigh 1.2g of the above-mentioned lithium titanate composite material, add a certain proportion of conductive agent, binder and N-methylpyrrolidone, and use a planetary ball mill to perform ball milling for 4 hours. It is coated with a film with a thickness of about 150 μm, and after vacu...

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Abstract

The invention relates to a lithium titanate composite material and a lithium ion battery containing the material. The lithium titanate composite material for the lithium ion battery contains barium, and at least three peaks exist in a range of 110-200cm<-1> in the Raman spectrogram of the composite material. The invention also relates to the lithium ion battery using the lithium titanate composite material as a negative material. The lithium ion battery has the advantages of good cycle stability, rapid charge and discharge and high safety.

Description

Technical field [0001] The invention relates to a lithium ion battery, and in particular to a lithium titanate composite material and a preparation method thereof, and a lithium ion battery using the lithium titanate composite material as a negative electrode. Background technique [0002] With the development of batteries, lithium-ion batteries have gradually become mainstream products due to their high specific energy, high voltage and low pollution characteristics. The negative electrode materials of lithium-ion batteries mainly include carbon-based materials, nitrides, silicon-based materials, tin-based materials, and various new alloys, among which carbon-based materials have been practically used, and other materials are mostly in the laboratory research stage. [0003] In the late 1980s, lithium titanate (Li 4 Ti 5 o 12 , LTO) has been studied as a cathode material for lithium-ion batteries, but because Li 4 Ti 5 o 12 Compared with lithium metal, the potential i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M10/0525
CPCH01M4/1391H01M4/362H01M4/485H01M10/0525H01M2004/027Y02E60/10
Inventor 周小平付凌雁
Owner 微宏先进材料公司