Sodium-ion battery negative electrode material and preparation method thereof

A sodium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high voltage platform, low energy density, poor cycle performance and rate performance, and achieve low working voltage and high energy density , The effect of good magnification performance

Inactive Publication Date: 2017-08-25
SOUTHWEST UNIV +1
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, to provide a negative electrode material for a sodium ion battery and a preparation method thereof, aiming at solving the problems of high voltage platform, low energy density, poor cycle performance and rate performance of the existing negative electrode material for a sodium ion battery technical issues

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  • Sodium-ion battery negative electrode material and preparation method thereof
  • Sodium-ion battery negative electrode material and preparation method thereof
  • Sodium-ion battery negative electrode material and preparation method thereof

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preparation example Construction

[0023] On the other hand, the embodiment of the present invention also provides a preparation method of the above-mentioned negative electrode material for a sodium ion battery, the preparation method comprising the following steps:

[0024] S01: Obtain manganese source, titanium source, phosphorus source and chelating agent;

[0025] S02: Dissolve the above manganese source, titanium source, phosphorus source and chelating agent in water, and dry in a water bath to obtain Mn 0.5 Ti 2 (PO 4 ) 3 Sol;

[0026] S03: Vacuum-dry or freeze-dry the above mixed sol to obtain Mn 0.5 Ti 2 (PO 4 ) 3 Precursor;

[0027] S04: The above Mn 0.5 Ti 2 (PO 4 ) 3 The precursor is calcined under an inert atmosphere to obtain a negative electrode material for a sodium ion battery.

[0028] The preparation method of the anode material of the above-mentioned sodium ion battery is mainly formed by sintering the manganese source, the titanium source, the phosphorus source and the chelatin...

Embodiment 1

[0036] A negative electrode material for a sodium ion battery, comprising a manganese-titanium-phosphorus ternary material and a carbon coating layer coated on the particle surface of the manganese-titanium-phosphorus ternary material, and the general formula of the manganese-titanium-phosphorus ternary material is Mn 0.5 Ti 2 (PO 4 ) 3 . The steps of the preparation method of the sodium ion battery negative electrode material are as follows:

[0037] S11: Obtain 1 mmol of manganese acetate, 4 mmol of tetrabutyl titanate, 6 mmol of phosphoric acid and 2 mmol of citric acid.

[0038] S12: Dissolve the above-mentioned manganese acetate, citric acid, tetrabutyl titanate and phosphoric acid in water, and dry in a water bath to obtain Mn 0.5 Ti 2 (PO 4 ) 3 Sol; the specific process is: first dissolve manganese acetate in 50ml deionized water, then dissolve citric acid in it, and finally dissolve tetrabutyl titanate and phosphoric acid in it, and keep stirring until the solut...

Embodiment 2

[0042] A negative electrode material for a sodium ion battery, comprising a manganese-titanium-phosphorus ternary material and a carbon coating layer coated on the particle surface of the manganese-titanium-phosphorus ternary material, and the general formula of the manganese-titanium-phosphorus ternary material is Mn 0.5 Ti 2 (PO 4 ) 3 . The steps of the preparation method of the sodium ion battery negative electrode material are as follows:

[0043] S21: 3 mmol of manganese oxalate, 12 mmol of tetrabutyl titanate, 18 mmol of ammonium dihydrogen phosphate and 1 mmol of citric acid were obtained.

[0044] S22: Dissolve the above-mentioned manganese oxalate, citric acid, tetrabutyl titanate and ammonium dihydrogen phosphate in water, and dry in a water bath to obtain Mn 0.5 Ti 2 (PO 4 ) 3 Sol; the specific process is: first dissolve manganese oxalate in 150ml deionized water, then dissolve citric acid in it, and finally dissolve tetrabutyl titanate and ammonium dihydroge...

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Abstract

The invention belongs to the field of battery negative electrode materials, and particularly relates to a sodium-ion battery negative electrode material and a preparation method thereof. The sodium-ion battery negative electrode material comprises a manganese titanium phosphate ternary material with the general formula as Mn0.5Ti2(PO4)3; the preparation method comprises the steps that a manganese source, a titanium source, a phosphate source and an chelating agent are acquired, the manganese source, the titanium source, the phosphate source and the chelating agent are dissolved into water, and after water bath and drying, a Mn0.5Ti2(PO4)3 sol is obtained; the Mn0.5Ti2(PO4)3 sol is subjected to vacuum drying or freeze drying to obtain a Mn0.5Ti2(PO4)3 precursor; the Mn0.5Ti2(PO4)3 precursor is subjected to calcining treatment in inert atmosphere, and the sodium-ion battery negative electrode material is obtained. The sodium-ion battery negative electrode material has the advantages of low working voltage, high energy density, stable cycle performance and good rate capability.

Description

technical field [0001] The invention belongs to the field of battery negative electrode materials, and in particular relates to a sodium ion battery negative electrode material and a preparation method thereof. Background technique [0002] With the continuous consumption of global fossil energy, the development of energy is forced to turn to sustainable renewable energy, such as wind energy and solar energy, which also promotes the global development of advanced energy storage technology momentum. Although lithium-ion batteries (Lithium-ion batteries, LIBs) are commercially successful, lithium resources are limited. With the increasing demand for lithium resources, it will be far from meeting people's demand for energy storage in the future. Lithium will become a resource that depletes faster. The content of sodium in the earth's crust is as high as 2.64%, which is 400 times that of lithium. In contrast, sodium resources are much more abundant than lithium resources, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054
CPCH01M4/366H01M4/5825H01M4/625H01M10/054Y02E60/10
Inventor 徐茂文詹仁明陈邵华
Owner SOUTHWEST UNIV
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