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Anode material used for lithium ion battery and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, negative electrodes, active material electrodes, etc., can solve problems such as unsatisfactory rate performance, low electronic conductivity, and limitations on the practical application of lithium zinc titanate, and achieve cycle and Good rate performance, simple preparation method and low cost

Inactive Publication Date: 2015-11-04
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low electronic conductivity and unsatisfactory rate performance limit the practical application of lithium zinc titanate

Method used

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  • Anode material used for lithium ion battery and preparation method thereof
  • Anode material used for lithium ion battery and preparation method thereof
  • Anode material used for lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] see Figure 1~3 , a negative electrode material for a lithium ion battery, the molecular formula of the negative electrode material is Li 2 ZnTi 3 o 8 C-N, from lithium salt, zinc source and titanium source according to the amount of material ratio n Li :n Zn :n Ti =2.2:1:3 mixed and sintered, the zinc source is a porous MOF material containing Zn, C and N elements.

[0046] The lithium salt is Li 2 CO 3 .

[0047] Described porous MOF material is ZIF-8, and molecular formula is Zn(MeIM) 2 ·(DMF)·(H 2 O) 3 , sod topology.

[0048] The titanium source is a mixture of MIL-125 (Ti) and anatase titanium dioxide, and the molecular formula of the MIL-125 (Ti) is Ti 8 o 8 (OH) 4 -(O 2 C-C 6 h 4 -CO 2 ) 6 .

[0049] The preparation method of above-mentioned negative electrode material, comprises the steps:

[0050] Step A, Li 2 CO 3 , ZIF-8, MIL-125(Ti) and anatase TiO 2 Ball milling and mixing for 3 hours to obtain the precursor, wherein calculated acco...

Embodiment 2

[0059] see Figure 4~6 , a negative electrode material for a lithium ion battery, the molecular formula of the negative electrode material is Li 2 ZnTi 3 o 8 C-N, from lithium salt, zinc source and titanium source according to the amount of material ratio n Li :n Zn :n Ti =2.4:1:3 mixed and sintered, the zinc source is a porous MOF material containing Zn, C and N elements.

[0060] The lithium salt is LiOH·H 2 O and LiNO 3 mixed lithium salts.

[0061] Described porous MOF material is ZIF-8, and molecular formula is Zn(MeIM) 2 ·(DMF)·(H 2 O) 3 , sod topology.

[0062] The titanium source is MIL-125 (Ti) and rutile TiO 2 The mixture, the MIL-125 (Ti) molecular formula is Ti 8 o 8 (OH) 4 -(O 2 C-C 6 h 4 -CO 2 ) 6 .

[0063] The preparation method of above-mentioned negative electrode material, comprises the steps:

[0064] Step A, LiOH·H 2 O and LiNO 3 Mixed lithium salts, ZIF-8 and MIL-125(Ti) and rutile TiO 2 Ball milling and mixing for 2 hours to obtain...

Embodiment 3

[0073] see Figure 7-9 , a negative electrode material for a lithium ion battery, the molecular formula of the negative electrode material is Li 2 ZnTi 3 o 8 C-N, from lithium salt, zinc source and titanium source according to the amount of material ratio n Li :n Zn :n Ti =2.4:1:3 mixed and sintered, the zinc source is a porous MOF material containing Zn, C and N elements.

[0074] The lithium salt is LiOH·H 2 O and LiNO 3 mixed lithium salts.

[0075] Described porous MOF material is ZIF-8, and molecular formula is Zn(MeIM) 2 ·(DMF)·(H 2 O) 3 , sod topology.

[0076] The titanium source is NH 2 -MIL-125(Ti) and rutile TiO 2 a mix of the NH 2 -MIL-125(Ti) molecular formula is Ti 8 o 8 (OH) 4 -(O 2 C-C 6 h 4 -NH 2 -CO 2 ) 6 .

[0077] The preparation method of above-mentioned negative electrode material, comprises the steps:

[0078] Step A, LiOH·H 2 O and LiNO 3 mixed lithium salts, ZIF-8, NH 2 -MIL-125(Ti) and rutile TiO 2 Ball milling and mixing ...

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Abstract

The invention belongs to the technical field of anode materials used for lithium ion batteries and in particular relates to the anode material Li2ZnTi3O8@C-N used for the lithium ion battery and a preparation method thereof. The anode material is formed by mixed sintering of lithium salt, zinc sources and titanium sources according to a mass ratio of the substances, namely nLi: nZn: nTi=2.0-2.5: 1: 3. The anode material Li2ZnTi3O8@C-N used for the lithium ion battery has high specific discharge capacity; through introducing C and N, the electronic conductivity of the material, the specific discharge capacity, and the multiplying power and the cycling performance of the material can be all improved. In addition, the preparation method has the advantages of simplicity, speediness, low energy consumption, low cost, friendly environment and better application prospect.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials, and in particular relates to a lithium-ion battery negative electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are considered to be one of the most green and clean energy sources, and are now widely used in portable electronic products. At the same time, it is considered to be a power source for hybrid electric vehicles and pure electric vehicles with great application prospects. High energy and power density, long cycle life and high safety are the conditions that power batteries must have. The anode material of commercial lithium-ion batteries is mainly graphite, but its poor rate performance and safety limit the use of graphite in power batteries. Ti-based anode materials have been extensively studied due to their excellent cycling and safety. Among them, lithium zinc titanate (Li zinc titanate) with spine...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/62H01M4/1391
CPCH01M4/1391H01M4/485H01M4/62H01M2004/027Y02E60/10
Inventor 王利娟陈宝宽杜朝军孟召辉赵迎迎
Owner NANYANG NORMAL UNIV
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