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A class of large particle sodium ion battery positive electrode material and method for increasing material particle size

A technology for sodium ion batteries and cathode materials, which is applied in the fields of energy materials and electrochemical power sources, can solve the problems of harsh synthesis conditions, difficulty in realizing large-scale production, and complicated preparation processes, and achieves simple and easy-to-implement preparation processes and excellent electrochemical Stability, rich source of raw materials and a wide range of effects

Inactive Publication Date: 2021-07-27
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the rapid development of portable electronic devices, higher requirements are put forward for the volumetric energy density of batteries. In the past, the methods of synthesizing large particles, such as co-precipitation and coating, have complex preparation processes and harsh synthesis conditions, making it difficult to achieve large-scale production.

Method used

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  • A class of large particle sodium ion battery positive electrode material and method for increasing material particle size
  • A class of large particle sodium ion battery positive electrode material and method for increasing material particle size
  • A class of large particle sodium ion battery positive electrode material and method for increasing material particle size

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Preparation of 5% Cu-doped NaFe 0.45 mn 0.5 Cu 0.05 o 2 Cathode material.

[0030] Weigh Na according to the corresponding proportion 2 CO 3 , Fe 2 o 3 , Mn 2 o 3 , CuO ball milled for 24 h, pressed into a disc with a diameter of 10 mm under a pressure of 10 MPa, and calcined at 1000 °C for 12 h to obtain a sample powder.

[0031] (2) Preparation of 5% copper-doped NaFe 0.45 mn 0.5 Cu 0.05 o 2 Composite cathode

[0032] Mix the prepared positive electrode material with the conductive additive Super-P and the binder polyvinylidene fluoride (PVDF) at a mass ratio of 7:2:1, and add an appropriate amount of N-methylpyrrolidone, after pulping and smearing , drying and other processes to obtain the composite positive electrode.

[0033] (3) Assembling sodium-ion batteries

[0034] Assemble the sodium-ion battery with the composite positive electrode prepared above and the sodium negative electrode, and select carbonate electrolyte (1M NaClO 4 EC / PC (volum...

Embodiment 2

[0038] (1) Preparation of 15% Cu-doped NaFe 0.35 mn 0.5 Cu 0.15 o 2 Positive electrode material (concrete steps are the same as embodiment 1);

[0039] (2) Preparation of 15% copper-doped NaFe 0.35 mn 0.5 Cu 0.15 o 2 Composite positive electrode (the specific steps are the same as in Example 1);

[0040] (3) Assembling a sodium-ion battery (the specific steps are the same as in Example 1);

[0041] (4) Sodium ion battery test (the specific steps are the same as in Example 1).

Embodiment 3

[0043] (1) Preparation of 5% Cu-doped NaNi 0.45 co 0.5 Cu 0.05 o 2 Cathode material (raw material is Na 2 CO 3 , NiO, Co 2 o 3 , CuO, all the other steps are with embodiment 1);

[0044] (2) Preparation of 5% copper-doped NaNi 0.45 co 0.5 Cu 0.05 o 2 Composite positive electrode (the specific steps are the same as in Example 1);

[0045] (3) Assembling a sodium-ion battery (the specific steps are the same as in Example 1);

[0046] (4) Sodium ion battery test (the specific steps are the same as in Example 1).

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Abstract

The invention discloses a class of large-grain sodium-ion battery cathode materials and a method for increasing the particle size of the materials, belonging to the technical field of energy materials. The large particle sodium ion battery positive electrode material (Na m A 1‑x B x o 2 , 0.05≤x≤0.25) It is prepared by pre-mixing, tableting, and high-temperature calcination. by Na m AO 2 The metal element B whose oxide melting point is close to the calcination temperature is added, and the melting of the material is used to make the material bond with a larger particle size, which improves the volumetric energy density and electrochemical performance of the material. The method is simple and easy to operate, has abundant raw materials and low price, and is easy to realize large-scale production. The anode material for a sodium ion battery provided by the present invention has a relatively large particle size and excellent electrochemical performance, so the anode material for a sodium ion battery of the present invention can be used as a novel high-volume energy density storage material with simple synthesis and suitable for large-scale production. energy materials with broad application prospects.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and also belongs to the technical field of energy materials, in particular to a class of large particle sodium ion battery cathode materials and a method for increasing the particle size of the materials. Background technique [0002] Compared with lithium-ion batteries, the sodium resources used in sodium-ion batteries have more abundant raw material reserves and wider distribution (the abundance in the earth's crust is about 2.74%, while lithium only accounts for 0.0065%), which makes sodium resources The price of sodium ion batteries is low, and the cost of sodium ion batteries is reduced, so sodium ion batteries are expected to develop into a new generation of energy storage batteries in the future. [0003] In recent years, layered transition metal oxides Na m AO 2 Due to a series of advantages such as reversible sodium ion deintercalation crystal structure, high specific capac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/13H01M10/054H01M10/058
CPCH01M4/13H01M4/366H01M4/485H01M4/505H01M4/525H01M10/054H01M10/058Y02E60/10Y02P70/50
Inventor 姚胡蓉吴知骏陈嘉昱
Owner FUJIAN NORMAL UNIV
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