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A kind of novel structure sodium ion battery and preparation method thereof

A sodium-ion battery, a new structure technology, applied in the manufacture of electrolyte batteries, structural parts, electrode manufacturing, etc., can solve the problems of low energy density of sodium-ion batteries, improve the interface contact characteristics, improve the degree of automated production, and improve safety. Effect

Active Publication Date: 2020-01-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy density of this kind of sodium ion battery is low, and the capacity decay of the battery is serious under the condition of high current charging and discharging.

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0021] In a specific embodiment, the preparation method of the novel structure sodium-ion battery of the present invention, sequentially deposits the negative electrode material, the diaphragm material and the positive electrode material on the surface of the three-dimensional porous current collector, and obtains a new type of sodium-ion battery with an integrated structure, including the following steps:

[0022] (1) preparation of negative electrode material plating solution;

[0023] (2) Electrodeposit the negative electrode material layer on the surface of the three-dimensional porous current collector, and impregnate the separator layer and the positive electrode material layer in sequence; wherein, the thickness of the negative electrode material layer is 0.05-5 μm, the thickness of the separator material is 5-30 μm, and the positive electrode material is filled with the current collector Three-dimensional pores to obtain integrated battery components;

[0024] (3) The ...

Embodiment 1

[0028] In the present embodiment, the negative electrode electroless plating solution is prepared according to the following formula: 1M (mol / L) hydrochloric acid, 50ml; SnCl 2 .2H 2 O, 25g / L; Thiourea, 45g / L; Citric acid, 35g / L; Sodium hypophosphite, 40g / L; Hydroquinone, 4.8g / L, the balance being water. At 35°C, nickel foam was used as a current collector to electrolessly plate tin on its surface for 15 minutes.

[0029] Slowly add 1.5 g of polyvinylidene fluoride into 100 ml of nitrogen methyl pyrrolidone, and mix evenly by ball milling to obtain a diaphragm material coating solution. The above-mentioned tin-plated current collector was immersed in the diaphragm coating solution for 120s, dried at 60°C for 20min, and repeated twice.

[0030] Slowly add 2.0 g of sodium manganate nanoparticles, 0.25 g of acetylene black, and 0.25 g of polyvinylidene fluoride into 10 ml of dimethylformamide in sequence, and mix them uniformly by ball milling to obtain a positive electrode mat...

Embodiment 2

[0035] In this embodiment, the negative electrode electroless plating solution is prepared according to the following formula: 1M hydrochloric acid, 60ml; SnCl 2 .2H 2 O, 15g / L; AgNO 3 , 5g / L; thiourea, 55g / L; citric acid, 40g / L; sodium hypophosphite, 40g / L; hydroquinone, 6.5g / L, and the balance is water. At 30°C, nickel foam was used as a current collector to electrolessly plate tin silver on its surface for 10 min.

[0036] Slowly add 1.0 g of polyphenylene ether into 100 ml of nitrogen methyl pyrrolidone, and mix evenly by ball milling to obtain a diaphragm material coating solution. The above-mentioned tin-plated current collector was immersed in the diaphragm coating solution for 100 seconds, dried at 60°C for 30 minutes, and repeated twice.

[0037] Slowly add 2.4 grams of sodium cobaltate nanoparticles, 0.3 grams of acetylene black, and 0.3 grams of polyvinylidene fluoride into 10 ml of dimethylformamide in sequence, and mix them uniformly by ball milling to obtain a...

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Abstract

The invention relates to the field of sodium ion batteries, in particular to a novel structural sodium ion battery and a preparation method thereof. The positive electrode, separator, and negative electrode of a sodium-ion battery have an integrated structure of an interpenetrating network. The negative electrode material, separator material, and positive electrode material are sequentially deposited or coated on the surface of the current collector to form a three-layer laminated structure, and the interface between the three is in close contact. The negative electrode of the sodium ion battery is prepared on the surface of the porous current collector by an electrochemical method, and the diaphragm is directly formed on the surface of the negative electrode by solution impregnation. New sodium-ion batteries. The invention integrates the positive electrode, the negative electrode and the diaphragm of the sodium ion battery, simplifies the internal structure and assembly process of the battery, and improves the interface contact characteristics between the electrode and the diaphragm. The sodium ion battery prepared by this method has excellent comprehensive performance and is easy to be large-scale and large in size. production advantages.

Description

technical field [0001] The invention relates to the field of sodium ion batteries, in particular to a novel structural sodium ion battery and a preparation method thereof. Background technique [0002] Among the current various technologies, lithium-ion batteries have conquered the portable electronics market due to their advantages such as high working voltage, high capacity, small self-discharge and long cycle life, and have become the mainstay of electric vehicles (including EV and HEV, etc.) and large-scale storage applications. The primary choice of power supply for power systems. However, with the advent of the era of electric vehicles and smart grids, global lithium resources will not be able to effectively meet the huge demand for power lithium-ion batteries, which will further push up the prices of lithium-related materials, increase battery costs, and ultimately hinder new developments. Development of the energy industry. Therefore, it is critical to develop othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/054H01M2/14H01M4/04H01M4/139H01M10/058H01M50/403
CPCH01M4/0404H01M4/0452H01M4/139H01M10/054H01M10/058H01M50/403Y02E60/10Y02P70/50
Inventor 肖伟刘伟华王红赵丽娜刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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