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Sodium ion battery anode material and sodium iron battery comprising anode material

A technology of sodium ion battery and cathode material, applied in battery electrodes, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of low sodium storage capacity, poor stability, poor rate performance, etc., and achieve high sodium storage capacity and good stability. , the effect of excellent rate performance

Inactive Publication Date: 2014-08-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a class of positive electrode materials for sodium-ion batteries and sodium-ion batteries including the positive electrode materials for the above-mentioned existing transition metal oxide positive electrode materials with low sodium storage capacity, poor stability and poor rate performance.

Method used

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  • Sodium ion battery anode material and sodium iron battery comprising anode material
  • Sodium ion battery anode material and sodium iron battery comprising anode material
  • Sodium ion battery anode material and sodium iron battery comprising anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 0.15 mol Na 2 CO 3 , 0.2 mol NiO and 0.05 mol Sb 2 o 3 Mixed, placed in a high-energy ball mill jar, high-energy ball milled for 4 hours, and then the mixture was calcined at 800°C for 12 hours to prepare Na 3 Ni 2 SbO 6 . Na 3 Ni 2 SbO 6 Mix with acetylene black (10 wt%) high energy ball mill for 30min to get Na 3 Ni 2 SbO 6 / C cathode material. The positive electrode material was uniformly mixed with vinylidene fluoride (PVDF) and acetylene black in a weight ratio of 7:2:1, and coated on aluminum foil to form an electrode film. With the electrode film as the working electrode and the metal sodium sheet as the counter electrode, 1mol L -1 NaPF 6 (The solvent is a mixture of EC and DEC, and the volume ratio of EC and DEC is 1:1). The electrolyte was assembled into a 2016-type coin cell for electrochemical testing. figure 1 Its constant current charge and discharge curve (0.1 C (20mA g -1 ) current density, charging and discharging in the range of 2-4.0 ...

Embodiment 2

[0032] 0.15 mol Na 2 CO 3 , 0.1 mol Co 2 o 3 and 0.05 mol Sb 2 o 5 , placed in a high-energy ball mill jar, high-energy ball milled for 4 hours, and then calcined at 900°C for 24 hours to prepare Na 3 co 2 SbO 6 . Na 3 co 2 SbO 6 Mix with Super P (20 wt%) planetary ball mill for 6h to get Na 3 co 2 SbO 6 / C cathode material.

[0033] Prepare electrode film by the method in embodiment 1 and carry out constant current charge and discharge test to it, figure 2 Its constant current charge and discharge curve (0.1 C (20mA g -1) current density and charge and discharge in the range of 2-4.0 V), it can be seen from the figure that the first cycle discharge capacity of the material is 88 mAh g -1 .

Embodiment 3

[0035] 0.15 mol Na 2 CO 3 , 0.05 mol Co 2 o 3 , 0.1 mol NiO and 0.05 mol Sb 2 o 3 , placed in a high-energy ball mill jar, high-energy ball milled for 6 hours, and then calcined at 1200°C for 6 hours to prepare Na 3 CoNiSbO 6 . Na 3 CoNiSbO 6 Mix with Ketjen black (5 wt%) planetary ball mill for 6h to get Na 3 CoNiSbO 6 / C cathode material.

[0036] Electrode film is prepared according to the method in embodiment 1 and is tested for row constant current charge and discharge, image 3 For this reason, the charge-discharge curve of the material at a current density of 0.1 C (20mA / g) shows that the discharge specific capacity of this material in the first week is 90 mAh g -1 , has a high sodium storage capacity.

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Abstract

The invention discloses a sodium ion battery anode material and a sodium iron battery comprising the anode material, and belongs to the technical field of energy source materials. The sodium ion battery anode material comprises a conductive additive and Na3-xM2LO6, wherein x is greater than or equal to 0 and smaller than 2; M is one or more of Fe, Co, Ni, Cu, Zn, Mg, V and Cr; L is one or more of Sb, Te, Nb, Bi and P. The preparation method comprises the steps of mixing sodium carbonate, M oxide and L oxide according to a stoichiometric proportion, ball-milling, calcining and ball-milling so as to obtain the sodium ion battery anode material. The sodium ion battery anode material has the advantages of high sodium storage capacity, good stability and excellent rate capability, and has extremely high energy density and power density; the assembled sodium iron battery has extremely good cycling stability, is green and clean, safe and environmentally friendly and low in cost, and is an extremely excellent electrochemical energy storage system; moreover, the preparation method of the anode material is extremely simple, and raw materials are low in price and easily available.

Description

[0001] technical field [0002] The invention discloses a positive electrode material of a sodium ion battery and a sodium ion battery comprising the positive electrode material, belonging to the technical field of energy materials. Background technique [0003] Traditional fossil energy (such as coal, oil, natural gas, etc.) has limited reserves, and due to the unrestrained exploitation and use of nearly two hundred years, the existing fossil energy reserves have decreased sharply and mining has become difficult, so it cannot meet the growing needs of human beings. production and survival needs. More seriously, fossil fuels have caused environmental pollution and endangered people's health. Therefore, it has become an irresistible trend to seek green and environmentally friendly new energy sources and promote the development of renewable energy sources. Renewable energy such as solar energy and wind energy has the characteristics of abundant resources, clean and pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/62
CPCY02E60/122H01M4/364H01M4/366H01M4/485H01M4/525H01M4/625H01M10/05Y02E60/10
Inventor 曹余良杨汉西苑丁丁艾新平
Owner WUHAN UNIV
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