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Graphene-coated titanium niobium oxide composite electrode material, lithium primary battery and preparation method thereof

A graphene-coated, titanium-niobium oxide technology, applied in the direction of active material electrodes, non-aqueous electrolyte batteries, dry batteries, etc., can solve the problems of low conductivity and reduced output power capacity, and achieve high energy density, low cost, Good material consistency

Inactive Publication Date: 2019-01-08
天津普兰能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiNb 2 o 7 It is almost an insulator, and its conductivity is low. When used as an electrode material for lithium batteries, there is still a problem that the capacity is greatly reduced when the output power is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The graphene-coated titanium-niobium oxide composite electrode material described in this embodiment includes TiNb 2 o 7 Inner core and graphene cladding layer, the mass fraction of graphene cladding layer is 1%. The specific preparation method is as follows:

[0042] Weigh 23.42g of anatase-type titanium dioxide and 76.58g of niobium pentoxide according to the molar ratio Ti:Nb=1:2, after ball milling for 10 hours, sinter in air at 1100°C for 12 hours, and then oxidize the produced titanium niobium After 10 hours of ball milling with graphene powder (content 1%), sintering 4h under the nitrogen atmosphere of 750 ℃, then after the sintered material is ground and pulverized, adopt resistance tester to test the resistance of powder, test powder resistance is 80Ω; the powder is prepared into an electrode, and the electrode preparation method is as follows: take 90% titanium niobium oxide, 5% Super_P conductive agent, 5% Solvay Solef 5130 binder and NMP as solvent, these ...

Embodiment 2

[0044] The graphene-coated titanium-niobium oxide composite electrode material described in this embodiment includes TiNb 1.9 o 6.75 Inner core and graphene cladding layer, the mass fraction of graphene cladding layer is 0.8%. The specific preparation method is as follows:

[0045] Weigh 23.42g of anatase titanium dioxide and 76.58g of niobium pentoxide according to the molar ratio Ti:Nb=1:2, after ball milling for 10 hours, sinter in air at 1000°C for 12 hours, and then oxidize the produced titanium niobium After 10 hours of ball milling with graphene powder (content 0.8%), sintering 4h under the nitrogen atmosphere of 750 ℃, then after the material after sintering is ground and pulverized, adopt resistance tester to test the resistance of powder, test powder resistance is 103Ω; the powder is prepared into an electrode, and the electrode preparation method is as follows: take 90% of titanium niobium oxide, 5% of Super_P conductive agent, 5% of Solvay’s Solef 5130 binder and...

Embodiment 3

[0047] The graphene-coated titanium-niobium oxide composite electrode material described in this embodiment includes TiNb 2 o 7 Inner core and graphene cladding layer, the mass fraction of graphene cladding layer is 1.2%. The specific preparation method is as follows:

[0048] Weigh 23.42g of anatase titanium dioxide and 76.58g of niobium pentoxide according to the molar ratio Ti:Nb=1:2, after ball milling for 10 hours, sinter in air at 1200°C for 12 hours, and then oxidize the produced titanium niobium After 10 hours of ball milling with graphene powder (content 1.2%), sintering 4h under the nitrogen atmosphere of 750 ℃, then after the material after sintering is ground and pulverized, adopt resistance tester to test the resistance of powder, test powder resistance is 70Ω; the powder is prepared into an electrode, and the electrode preparation method is as follows: take 90% titanium niobium oxide, 5% Super_P conductive agent, 5% Solvay Solef 5130 binder and NMP as solvent, ...

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Abstract

A lithium primary battery comprise TiNbxO2 (2 +2. 5x) core and graphene coating layer, lithium primary battery and preparation method thereof, wherein that mass fraction of the graphene coating layeris 0.01%-5% wt%, where x is 1.8-2.3. A manufacture method comprises mix a titanium source and a niobium source, and sintering to obtain a TiNbxO2 (2 +2.5 x) material; TiNbxO (2 + 2.5 x) was mixed withgraphene or graphene precursor and sintered to obtain graphene-coated titanium niobium oxide composite electrode material. The primary lithium battery uses the graphene-coated titanium niobium oxidecomposite electrode material as the positive electrode active material and the lithium as the negative electrode active material. The TiNbxO_(2 +2.5 x) composite electrode material utilizes the high lithium storage capacity of TiNbxO (2 +2.5 x) and the good conductivity of graphene, and adopts the graphene-coated TiNbxO (2 +2.5 x) material, which greatly improves the gram capacity exertion and magnification performance of the material. The preparation method is simple and the cost is low. The lithium primary battery has high energy density, high safety and reliability, and has the characteristics of large current pulse.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials, and in particular relates to a graphene-coated titanium-niobium oxide composite electrode material, a lithium primary battery and a preparation method. Background technique [0002] Lithium primary batteries have the advantages of high energy density, light weight, and small size, and are widely used in the main power supply and memory backup power supply of various electronic devices. In recent years, with the optimization and upgrading of automobiles, it is expected to develop lithium primary batteries in the automotive field the use of. Based on such a background, it is required to improve the safety performance of lithium primary batteries while maintaining the high energy density characteristic of lithium primary batteries, and to improve output characteristics, especially pulse (intermittent) discharge characteristics as instantaneous large current characteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M6/06
CPCH01M4/366H01M4/48H01M4/625H01M6/14H01M2004/028
Inventor 陈永胜李爱红王茂范崔维国
Owner 天津普兰能源科技有限公司
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