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Sodium-ion battery and preparation method thereof

A sodium ion battery and sodium ion technology, which is applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problem that sodium ion batteries are difficult to simultaneously take into account high sodium intercalation capacity and good dynamic characteristics, and achieve rich raw materials , low cost, simple and easy preparation method

Active Publication Date: 2014-08-27
徐州本色电力设备科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the first aspect of the embodiment of the present invention provides a sodium-ion battery to solve the problem that it is difficult for sodium-ion batteries in the prior art to take into account both high sodium intercalation capacity and good kinetic characteristics at the same time. At the same time, it also has good cycle stability and good safety performance

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  • Sodium-ion battery and preparation method thereof
  • Sodium-ion battery and preparation method thereof
  • Sodium-ion battery and preparation method thereof

Examples

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preparation example Construction

[0050] In the second aspect, an embodiment of the present invention provides a method for preparing a sodium ion battery, including the following steps:

[0051] Take the positive electrode active material, the conductive agent, the binder and the organic solvent, mix and stir to prepare the positive electrode slurry, coat the positive electrode slurry on the current collector, dry and roll to prepare the positive electrode sheet. The cathode active material is Na X CoO 2 , Na X MnO 2 , Na X TiS 2 , Na X NbS 2 Cl 2 , Na X WO 3-X , Na X V 0.5 Cr 0.5 S, amorphous Na X MoS 3 Or Na X TaS 2 , In each formula, 0X Ni 0.5 Mn 0.5 O 2 , NaVPO 4 F or Na 2 FePO 4 F;

[0052] Take the negative electrode active material, the conductive agent, the binder and the organic solvent, mix and stir to prepare the negative electrode slurry, coat the negative electrode slurry on the current collector, dry and roll to prepare the negative electrode sheet. The anode active material is MoS 2 ;

[0053] The po...

Embodiment 1

[0063] A preparation method of sodium ion battery includes the following steps:

[0064] MoS 2 Synthesis:

[0065] Add 2mmol of Na 2 MoO 4 And 6mmol of CH 3 CSNH 2 Add to 30mL of distilled water to form a mixed solution. Then, under stirring, 10mol / L HCl was added dropwise to the mixed solution to adjust the pH value of the mixed solution to less than 1. The mixed solution was transferred to a stainless steel hydrothermal kettle with a polytetrafluoroethylene liner and heated at 240°C for 36 hours. After the reaction kettle is cooled to room temperature, the precipitate obtained is filtered, washed repeatedly with distilled water, and then the precipitate is heated at 400°C for 2 hours under the protection of argon to prepare MoS 2 . Before treatment, the tube furnace is pre-evacuated and filled with pure argon at normal pressure.

[0066] MoS was performed on JSM-7401F field emission scanning electron microscope (FESEM) and JEM-2010F transmission electron microscope (TEM) 2 Chara...

Embodiment 2

[0079] A sodium ion battery including:

[0080] Positive pole piece, including positive active material Na 0.5 CoO 2 And aluminum current collector,

[0081] Negative pole piece, including negative active material MoS 2 And copper current collector,

[0082] Non-aqueous organic electrolyte, including sodium salt NaClO 4 And organic solvents (500 g EC, 500 g DMC and 500 g DEC), and

[0083] Composite diaphragm composed of polypropylene and polyethylene.

[0084] The preparation method is the same as the preparation method of the sodium ion secondary battery in Example 1, except that the positive electrode active material is different from the sodium salt.

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Abstract

An embodiment of the invention provides a sodium-ion battery. The sodium-ion battery comprises a positive electrode, a negative electrode, a non-aqueous organic electrolyte and a diaphragm. The positive electrode comprises a positive electrode active material and a current collector, wherein the positive active material is NaXCoO2, NaXMnO2, NaXTiS2, NaXNbS2Cl2, NaXWO3-X, NaXV0.5Cr0.5S, amorphous NaXMoS3, NaXTaS2, NaXNi0.5Mn0.5O2, NaVPO4F or Na2FePO4F. The negative electrode comprises a negative electrode active material and a current collector, wherein the negative electrode active material is MoS2. The sodium-ion battery overcomes the defects that a conventional sodium-ion battery is difficult to balance high sodium embedded capacity and good dynamic characteristics. The sodium-ion battery has good cycling stability and good safety performance while keeping high capacity. The preparation method of the sodium-ion battery is simple and practicable; raw materials are abundant and cost is low.

Description

Technical field [0001] The invention relates to the technical field of secondary batteries, in particular to a sodium ion battery and a preparation method thereof. Background technique [0002] Among the many energy storage technologies, lithium-ion batteries have been widely used in digital cameras, smart phones, notebook computers, etc. due to their advantages of high energy density, long cycle life, light weight, and non-polluting. However, the reserves of lithium resources are limited and unevenly distributed, which has become a problem that needs to be faced in the large-scale development of energy storage batteries. [0003] Sodium and lithium are in the same main group, have similar physical and chemical properties and storage mechanisms, and are rich in sodium resources, with 2.74% reserves in the earth's crust, widely distributed, and low refining costs. Sodium ion batteries usually use sodium-based positive electrodes (such as sodium-containing transition metal oxides) a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/054H01M4/48H01M4/58H01M10/058
CPCH01M4/483H01M4/5815H01M4/582H01M4/5825H01M10/054H01M10/058Y02E60/10Y02P70/50
Inventor 王强
Owner 徐州本色电力设备科技有限公司
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