Sodium-ion battery additive and high-power sodium-ion battery

A sodium-ion battery and additive technology, applied in the field of materials, can solve the problems of short battery life and high safety hazards, and achieve the effect of reducing internal resistance and improving the migration performance of sodium ions

Pending Publication Date: 2022-07-26
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention aims at the problems of short battery life and high potential safety hazards in existing high-power working conditions, and provides a sodium-ion battery additive and a high-power sodium-ion battery, which have high power, high safety and reliability performance

Method used

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  • Sodium-ion battery additive and high-power sodium-ion battery
  • Sodium-ion battery additive and high-power sodium-ion battery
  • Sodium-ion battery additive and high-power sodium-ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Preparation of positive pole piece: add 100wt% solvent N-methylpyrrolidone (NMP) and 5wt% binder polyvinylidene fluoride (PVDF) powder into the planetary stirring cylinder, rotate at 30r / min, disperse at 3000r / min speed Stir for 2 hours, then add 5wt% of conductive agent carbon black (SP), stir for 1 hour at the speed of revolution 30r / min, dispersion 3000r / min, then add 5wt% Na-β-alumina, press revolution 30r / min , stirring at a speed of 3000r / min for 1 hour, and then adding 85wt% of the positive active material O3-Na[Cu 0.22 Fe 0.3 Mn 0.48 ]O 2 , and stir for 3 hours at 30 r / min revolution and 3000 r / min dispersion, then defoaming and sieving through a 200-mesh sieve to complete the preparation of the positive electrode slurry for sodium ion batteries;

[0050] The positive electrode slurry prepared above was evenly coated on an aluminum foil with a thickness of 15 μm by means of extrusion, and was dried, rolled and cut to prepare a positive electrode pole piece. ...

Embodiment 2

[0055] The 26650 cell was prepared by the same method as in Example 1. The difference from Example 1 is that in the positive and negative electrode materials, the proportion of Na-β-alumina is 10wt%, and the proportion of positive and negative active materials is both 80wt% %, number A2.

Embodiment 3

[0057] The 26650 cell was prepared by the same method as in Example 1. The difference from Example 1 is that in the positive and negative electrode materials, the proportion of Na-β-alumina is 15wt%, and the proportion of positive and negative electrode active materials is both 75wt% %, number A3.

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Abstract

The invention relates to a sodium ion battery additive and a high-power sodium ion battery. The additive is beta-aluminum oxide, the chemical formula of the beta-aluminum oxide is M2O.xAl2O3, M is one or more of IA group elements or IB group elements in the periodic table of elements, and x is equal to 5-11; the additive is used as an additive of a sodium-ion battery positive electrode material and / or a sodium-ion battery negative electrode material.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a sodium-ion battery additive and a high-power sodium-ion battery. Background technique [0002] Under high-power application conditions (10C, minute-level response time), the cycle life of a single lithium-ion battery system under actual conditions will be greatly reduced. Usually, the combination of power type and energy type cells is used to improve Service life, high application cost. [0003] At present, most of the high-power application conditions still use lead-acid batteries, but the service life of lead-acid batteries is only 2-3 years, and the industry still lacks effective methods in the recycling and treatment of lead-acid batteries to eliminate environmental pollution. [0004] Sodium-ion batteries have many unique advantages, such as abundant raw material resources, low cost, environmental friendliness, high energy conversion efficiency, long cycle life, strong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M10/054H01M10/42
CPCH01M4/485H01M10/4235H01M10/054Y02E60/10
Inventor 胡勇胜周权陆雅翔陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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