Iron oxide/titanium carbide composite cathode material and preparation method thereof

A negative electrode material, titanium carbide technology, used in battery electrodes, electrical components, circuits, etc., can solve the problems of easy agglomeration of nanoparticles, low cycle life, low electrical conductivity, etc., and achieve low agglomeration rate, low cost, and excellent electrical conductivity. Effect

Inactive Publication Date: 2018-08-03
ZHEJIANG FOREVER NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For the above-mentioned problems of the prior art, the object of the present invention is to provide a kind of iron oxide/titanium carbide composite negative electrode material and preparation method thereof, and this material solves the problem that the cycle life of iron oxide a

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  • Iron oxide/titanium carbide composite cathode material and preparation method thereof
  • Iron oxide/titanium carbide composite cathode material and preparation method thereof
  • Iron oxide/titanium carbide composite cathode material and preparation method thereof

Examples

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Embodiment 1

[0033] This embodiment provides a preparation method of iron oxide / titanium carbide composite negative electrode material, such as figure 1 As shown, the method includes the following steps:

[0034] 1) Weigh commercially available titanium aluminum carbide Ti 3 AlC 2 10g was added to 600ml of HF solution with a concentration of 40%, stirred at room temperature for 20h, then centrifuged and washed with water to obtain two-dimensional titanium carbide Ti 3 C 2 T x Materials, where T refers to surface groups, such as F, O, OH, etc.

[0035] Such as figure 2 Shown is the two-dimensional titanium carbide Ti prepared above 3 C 2 T x The scanning electron microscope photo of the material, as can be seen from the figure, the prepared two-dimensional titanium carbide Ti 3 C 2 T x The material is a multi-layer sheet structure.

[0036] 2) Weigh the two-dimensional titanium carbide Ti prepared in step 1) 3 C 2 T x Add 1g of material to 500ml of ethylene glycol solution ...

Embodiment 2

[0045] This embodiment provides a preparation method of iron oxide / titanium carbide composite negative electrode material, such as figure 1 As shown, the method includes the following steps:

[0046] 1) Weigh commercially available titanium aluminum carbide Ti 3 AlC 2 10g was added to 500ml of HF solution with a concentration of 10%, stirred at room temperature for 24h, then centrifuged and washed with water to obtain two-dimensional titanium carbide Ti 3 C 2 T x Materials, where T refers to surface groups, such as F, O, OH, etc.

[0047] By scanning electron microscopy, the two-dimensional titanium carbide Ti 3 C 2 T x The material structure is consistent with that in Example 1, which is a multilayer sheet structure.

[0048] 2) Weigh the two-dimensional titanium carbide Ti prepared in step 1) 3 C 2 T x Add 1g of material to 500ml of ethylene glycol solution with a volume concentration of 10%, and stir for 1h to obtain uniform titanium carbide Ti 3 C 2 T x Disp...

Embodiment 3

[0054] This embodiment provides a preparation method of iron oxide / titanium carbide composite negative electrode material, such as figure 1 As shown, the method includes the following steps:

[0055] 1) Weigh commercially available titanium aluminum carbide Ti 3 AlC 2 10g was added to 800ml of HF solution with a concentration of 30%, stirred at room temperature for 8h, then centrifuged and washed with water to obtain two-dimensional titanium carbide Ti 3 C 2 T x Materials, where T refers to surface groups, such as F, O, OH, etc.

[0056] 2) Weigh the two-dimensional titanium carbide Ti prepared in step 1) 3 C 2 T x Add 1g of material to 500ml of ethylene glycol solution with a volume concentration of 50%, stir for 1h to obtain uniform titanium carbide Ti 3 C 2 T x Dispersion liquid, wherein, Ti 3 C 2 T x Ti in the dispersion 3 C 2 T x The mass volume concentration is 2mg / ml.

[0057] 3) Weigh 2.7g FeCl 3 ·6H 2 O(Fe 3+ 0.01mol) and 0.5g polyvinylpyrrolidone...

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Abstract

The invention relates to an iron oxide/titanium carbide composite cathode material and a preparation method thereof. The method comprises the following steps: dispersing titanium carbide in an organicsolution to form uniform titanium carbide dispersion liquid; then adding soluble ferric salt and polyvinylpyrrolidone in the titanium carbide dispersion liquid and stirring the materials to obtain mixed liquor A; dropping an urea solution in the mixed liquor A while stirring to obtain mixed liquor B; placing the mixed liquor B at the temperature of 80-200 DEG C and performing a hydrothermal reaction for 1-24 h, and performing steps of centrifugation, washing and drying on a reaction product to obtain the iron oxide/titanium carbide composite cathode material. The preparation technology is simple, a high temperature process is not required, energy consumption is low, the cycle performance of the iron oxide/titanium carbide composite cathode material is greatly increased, and the conductivity and capacity conservation rate are good.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an iron oxide / titanium carbide composite negative electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are currently the subject of development in the new energy industry. It has high energy density, long cycle life, and no pollution during charging and discharging. It is an excellent energy storage device. With the widespread application of lithium-ion batteries in electric vehicles, the pursuit of higher and higher energy density is an important aspect of current research on lithium-ion batteries. In existing lithium-ion batteries, graphite is generally used as the negative electrode material, and the theoretical capacity of graphite is only 350mAhg -1 , The low capacity affects the overall energy density of the lithium-ion battery, and the lithium intercalation potential is too low to easily form lithium dendri...

Claims

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Application Information

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IPC IPC(8): H01M4/36
CPCH01M4/362Y02E60/10
Inventor 童路攸韩彬陈丽鲜刘雷尹佳
Owner ZHEJIANG FOREVER NEW ENERGY TECH CO LTD
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