Method for preparing chromium-titanium-based lithium ion battery composite material

An ion battery and composite material technology is applied in the field of preparation of chromium-titanium-based lithium ion battery composite materials to achieve the effects of high use value, good reversible capacity with wide potential window and cost reduction

Active Publication Date: 2019-08-16
NANJING GUOXUAN BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 3d orbital of Ti in lithium titanate is an empty orbital, and the band gap energy is about 2V, which makes Li 4 Ti 5 o 12 The anode material becomes an insulator, which severely limits the Li 4 Ti 5 o 12 High Rate Capability of Materials

Method used

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  • Method for preparing chromium-titanium-based lithium ion battery composite material
  • Method for preparing chromium-titanium-based lithium ion battery composite material
  • Method for preparing chromium-titanium-based lithium ion battery composite material

Examples

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Effect test

Embodiment 1

[0030] A preparation method of a chromium-titanium-based lithium-ion battery composite material proposed by the present invention comprises the following steps:

[0031] S1. Weigh 12 mol of tetrabutyl titanate and 12 mol of chromium nitrate nonahydrate and dissolve them in an aqueous solution of absolute ethanol, add 15 mol of lithium hydroxide monohydrate in an aqueous ethanol solution under stirring, stir magnetically for 1 hour, and then add 2 mol of nickel nitrate and an aqueous solution of 2mol sodium molybdate, magnetically stirred for 1h, transferred the mixed solution to a stainless steel polytetrafluoroethylene reactor, put it into an oven and reacted at 160°C for 24h, cooled to room temperature, and filtered the mixed solution in the reactor get the precursor;

[0032] S2. Place the precursor in an oven, dry it at 80°C, grind it and place it in a muffle furnace for pre-calcination at 600°C for 6 hours, cool to room temperature, mill it in a ball mill for 3 hours, sie...

Embodiment 2

[0040] A preparation method of a chromium-titanium-based lithium-ion battery composite material proposed by the present invention comprises the following steps:

[0041] S1. Dissolve the titanium source and the chromium source in an aqueous solution of absolute ethanol, add the aqueous ethanol solution containing the lithium source, stir, then add the aqueous solution containing nickel nitrate and sodium molybdate, stir, react at 140°C for 26h, cool, and filter , to obtain the precursor;

[0042] S2, drying the precursor, pre-calcining, cooling, ball milling, sieving, then sintering, cooling to obtain LiCrTiO 4 -aNiMoO 4 Material;

[0043] S3, the LiCrTiO 4 -aNiMoO 4 The material is dissolved in deionized water, ultrasonically dispersed, a surfactant is added, stirred, and then pyrrole monomer, hydrochloric acid and ammonium persulfate aqueous solution are added, stirred, filtered, and dried to obtain a chromium-titanium-based lithium ion battery composite material.

Embodiment 3

[0045] A preparation method of a chromium-titanium-based lithium-ion battery composite material proposed by the present invention comprises the following steps:

[0046] S1. Dissolve tetrapropyl titanate and chromium acetate in an aqueous solution of absolute ethanol, add an aqueous ethanol solution containing lithium acetate dihydrate under stirring conditions, stir magnetically for 1.5 hours, and then add an aqueous solution containing nickel nitrate and sodium molybdate , magnetically stirred for 1.5h, then reacted at 140°C for 26h, cooled to room temperature, and filtered to obtain a precursor; wherein, the molar ratio of lithium acetate dihydrate, chromium acetate, and tetrapropyl titanate was 1:1:1, and nickel nitrate The molar ratio with sodium molybdate is 1:1;

[0047] S2. Place the precursor at 85°C to dry, after grinding, place it at 630°C for 5.5h, cool to room temperature, ball mill for 2.5h, sieve, then sinter at 840°C for 11h, cool to room temperature to obtain ...

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Abstract

The invention discloses a method for preparing a chromium-titanium-based lithium ion battery composite material, comprising the following steps of: S1, dissolving a titanium source and a chromium source in an aqueous solution of absolute ethanol, adding an aqueous solution of ethanol containing a lithium source, stirring the mixed solution, and then adding an aqueous solution containing nickel nitrate and sodium molybdate, stirring the mixed solution to react at 140 to 180 degrees centigrade for 24 to 26 hours, and cooling and filtering a reaction product to obtain a precursor; S2, drying, calcining, cooling, ball milling, sieving, sintering and cooling the precursor to obtain a LiCrTiO4-aNiMoO4 material; S3, dissolving the LiCrTiO4-aNiMoO4 material in deionized water, dispersing ultrasonically the material, adding a surfactant, stirring the mixture, then adding pyrrole monomer, hydrochloric acid and an ammonium persulfate aqueous solution, stirring, filtering and drying the mixture toobtain the chrome-titanium-based lithium ion battery composite material.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a preparation method of a chromium-titanium-based lithium-ion battery composite material. Background technique [0002] With the reduction of non-renewable energy sources and the aggravation of environmental pollution, it is of vital significance to develop new energy sources and environmentally friendly energy sources. The development of various electronic devices as well as electric vehicles and hybrid vehicles has put forward higher requirements for lithium-ion batteries that provide energy for them. Lithium-ion batteries have the advantages of high output voltage, high energy density and power density, and long cycle life, and are recognized as the most promising power batteries. [0003] At present, the anode materials of commercial lithium-ion batteries mostly use various lithium intercalation carbon / graphite materials. However, the lithium intercalation pote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M4/62H01M10/0525
CPCH01M4/362H01M4/485H01M4/525H01M4/62H01M10/0525Y02E60/10
Inventor 韩明凯姚汪兵
Owner NANJING GUOXUAN BATTERY CO LTD
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