Li4Ti5O12 negative material and lithium titanate battery prepared from same

A technology of negative electrode materials and powder materials, which is applied in the field of electrochemistry, can solve the problems of poor decontamination effect of fillers, etc., and achieve the effects of good reversibility of lithium deintercalation, high ion conductivity, and inhibition of reduction reaction

Active Publication Date: 2017-03-22
四川国创成电池材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a Li 4 Ti 5 o 12 The negative electrode material and the lithium titanate battery made thereof solve the problem of poor decontamination effect of fillers in the prior art

Method used

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  • Li4Ti5O12 negative material and lithium titanate battery prepared from same
  • Li4Ti5O12 negative material and lithium titanate battery prepared from same
  • Li4Ti5O12 negative material and lithium titanate battery prepared from same

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Embodiment 1

[0024] Li used in the lithium titanate battery of the present embodiment 4 Ti 5 o 12 Negative electrode material, the specific composition is Li 4 Ti 5 o 12 For 96 parts, Li 1+2x m 2y Ti (2-x-y) P 3 o 12-x (x=0.1, y=0.1, M=Mg) is 3 parts, and the carbon layer is 1 part. Li 4 Ti 5 o 12 Negative material. The preparation steps are as follows:

[0025] First, lithium carbonate, titanium dioxide, ammonium dihydrogen phosphate and magnesium carbonate are weighed according to the stoichiometric ratio. Secondly, mix the weighed powder material and deionized water according to the mass ratio of 1:10 by ball milling, and after the ball milling is evenly mixed, the slurry is stirred and dried. The dried powder was placed in a muffle furnace, calcined at 980 °C for 12 hours, and cooled naturally to obtain Li 4 Ti 5 o 12 / Li 1.2 Mg 0.2 Ti 1.8 P 3 o 11.9 Powder material. Will Li 4 Ti 5 o 12 / Li 1.2 Mg 0.2 Ti 1.8 P 3 o 11.9 The powder, Tween 80, and deionized...

Embodiment 2

[0029] Li used in the lithium titanate battery of the present embodiment 4 Ti 5 o 12 Negative electrode material, the specific composition is Li 4 Ti 5 o 12 For 98 parts, Li 1+2x m 2y Ti (2-x-y) P 3 o 12-x (x=0.1, y=0.1, M=Mg) is 2 parts, and the carbon layer is 0.1 part. Li 4 Ti 5 o 12 Negative material. The preparation steps are as follows:

[0030] First, lithium hydroxide, titanium dioxide, ammonium hydrogen phosphate and magnesium carbonate are weighed according to the stoichiometric ratio. Secondly, the weighed powder material and deionized water are ball milled and mixed according to the mass ratio of 1:50, and the slurry is stirred and dried after the ball mill is evenly mixed. The dried powder was placed in a muffle furnace, calcined at 800 °C for 20 hours, and cooled naturally to obtain Li 4 Ti 5 o 12 / Li 1.2 Mg 0.2 Ti 1.8 P 3 o 11.9 Powder material. Will Li 4 Ti 5 o 12 / Li 1.2 Mg 0.2 Ti 1.8 P 3 o 11.9 The powder, Tween 60, and deioniz...

Embodiment 3

[0033] Li used in the lithium titanate battery of the present embodiment 4 Ti 5 o 12 Negative electrode material, the specific composition is Li 4 Ti 5 o 12 For 95 parts, Li 1+2x m 2y Ti (2-x-y) P 3 o 12-x (x=0.1, y=0.2, M=Al) is 4 parts, and the carbon layer is 0.1 part. Li 4 Ti 5 o 12 Negative material. The preparation steps are as follows:

[0034] First, lithium hydroxide, titanium dioxide, ammonium hydrogen phosphate and aluminum oxide are weighed according to the stoichiometric ratio. Secondly, the weighed powder material and deionized water are ball milled and mixed according to the mass ratio of 1:50, and the slurry is stirred and dried after the ball mill is evenly mixed. The dried powder was placed in a muffle furnace, calcined at 1200 °C for 6 hours, and cooled naturally to obtain Li 4 Ti 5 o 12 / Li 1.2 Al 0.4 Ti 1.6 P 3 o 11.9 Powder material. Will Li 4 Ti 5 o 12 / Li 1.2 Al 0.2 Ti 1.8 P 3 o 11.9 The powder, Tween 60, and deionized wa...

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Abstract

The invention relates to an Li4Ti5O12 negative material and a lithium titanate battery prepared the Li4Ti5O12 negative material. The Li4Ti5O12 negative material disclosed by the invention is of a multilayer core-shell structure, and is prepared from an Li4Ti5O12 material in the center, an Li1+2xM2yTi(2-x-y)P3O12-x layer in the middle and a conducting carbon layer on the surface, wherein x and y are in the range of 0 to 0.2. The lithium titanate battery is prepared from an active substance using the Li4Ti5O12 material as a negative plate. The Li4Ti5O12 negative material and the lithium titanate battery disclosed by the invention have excellent electrochemical performance, cycling stability and safety, and are expected to be widely applied in the fields of new energy automobiles and energy storage.

Description

technical field [0001] The present invention relates to a kind of Li 4 Ti 5 o 12 Anode materials, anodes for lithium-ion batteries, and preparation processes for lithium-ion batteries. It belongs to the field of electrochemical technology. Background technique [0002] With the advancement of science and technology, more and more electronic products, power tools, and mobile products appear in people's lives. The rapid development of these products requires high-performance batteries. Among them, compared with lead-acid batteries, nickel-cadmium batteries, and nickel-hydrogen batteries, lithium-ion batteries have advantages such as high operating voltage and high specific energy, so they have been widely used. [0003] Lithium titanate (Li4Ti5O12) has a spinel structure and is a "zero-strain" negative electrode material with stable discharge voltage and high lithium intercalation potential (vs.1.55V), which is not easy to cause metal lithium precipitation, wide source of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M10/0525
CPCH01M4/485H01M10/0525Y02E60/10
Inventor 胡蕴成王睿
Owner 四川国创成电池材料有限公司
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