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High-performance liquid metal battery negative current collector and preparation method thereof

A liquid metal battery and current collector technology, which is applied in battery electrodes, active material electrodes, electrode carriers/current collectors, etc., can solve the problems that current collectors cannot solve corrosion and wettability at the same time, and achieve excellent rate performance and electrochemical performance. Cycling performance, increase in electrochemical reaction speed, and the effect of extending the intrusion path

Active Publication Date: 2020-02-04
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-performance liquid metal battery negative electrode current collector and its preparation method to solve the problem that the existing current collectors in the background technology cannot solve the corrosion and wettability problems at the same time, and apply it to liquid metal batteries. Improve electrode reaction speed and improve electrode stability

Method used

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  • High-performance liquid metal battery negative current collector and preparation method thereof
  • High-performance liquid metal battery negative current collector and preparation method thereof
  • High-performance liquid metal battery negative current collector and preparation method thereof

Examples

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Embodiment 1

[0032] A high-performance liquid metal battery negative electrode collector, comprising the following steps:

[0033] Step 1: Cut the foamed Ni matrix material with a pore size of 40PPI, a porosity of 90%, and a thickness of 100mm into a cylindrical sample with a size of φ100mm×100mm, soak it in acetone, ultrasonically clean it for 30 minutes, and rinse it with alcohol to Remove the oil on the surface of the material, and finally use N 2 Dry with air to obtain the cleaned matrix material.

[0034] Step 2: Anneal the foamed Ni matrix material cleaned in step 1 first. The specific heating program is to heat from room temperature to the target temperature of 1000°C at a heating rate of 5°C / min, keep it warm for 30min, and then heat it at 10°C / min Lower the temperature to 850°C, which is the cracking temperature of the carbon source in the subsequent chemical vapor deposition stage, and keep it warm for 20 minutes. The purpose of annealing treatment is to reduce the oxide on the ...

Embodiment 2

[0037] A high-performance liquid metal battery negative electrode collector, comprising the following steps:

[0038] Step 1: Cut the foamed Ni-Fe matrix material with a pore size of 80PPI, a porosity of 95%, and a thickness of 5mm into a cylindrical sample with a size of φ5mm×5mm, soak it in acetone, ultrasonically clean it for 30min, and rinse it with alcohol , to remove the oil on the surface of the material, and finally use N 2 Dry with air to obtain the cleaned matrix material.

[0039]Step 2: Anneal the foamed Ni-Fe matrix material cleaned in step 1 first. The specific heating program is to heat from room temperature to the target temperature of 900°C at a heating rate of 5°C / min, keep it warm for 10 minutes, and then heat it at 10°C / min to 700°C, which is the cracking temperature of the carbon source in the subsequent chemical vapor deposition stage, and kept for 20 minutes. The purpose of annealing treatment is to reduce the oxide on the surface of the matrix skeleto...

Embodiment 3

[0042] A high-performance liquid metal battery negative electrode collector, comprising the following steps:

[0043] Step 1: Cut the foamed Ni-Fe matrix material with a pore size of 60PPI, a porosity of 98%, and a thickness of 10mm into a cylindrical sample with a size of φ10mm×10mm, soak it in acetone, ultrasonically clean it for 30min, and then rinse it with alcohol , to remove the oil on the surface of the material, and finally use N 2 Dry with air to obtain the cleaned matrix material.

[0044] Step 2: Anneal the foamed Ni-Fe matrix material cleaned in step 1 first. The specific heating program is to heat from room temperature to the target temperature of 1000°C at a heating rate of 5°C / min, keep it warm for 10 minutes, and then heat it at 10°C / min to 800°C, which is the cracking temperature of the carbon source in the subsequent chemical vapor deposition stage, and kept for 20 minutes. The purpose of annealing treatment is to reduce the oxide on the surface of the matr...

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Abstract

The invention provides a high-performance liquid metal battery negative current collector and a preparation method thereof, and belongs to the technical field of battery material preparation. A graphene layer is controllably grown in situ on a nickel-based alloy foam skeleton by adopting a chemical vapor deposition method, so that the tight combination of the graphite layer and a nickel-based alloy foam material matrix is realized, and the high-performance negative current collector is obtained. On one hand, a graphite protective layer is used as an effective barrier for preventing corrosion,so that the corrosion time of the nickel-based alloy foam matrix and the invasion path of an erosion substance can be prolonged, and the long-acting stable operation of a liquid metal battery is realized; and on the other hand, the prepared fish-scale-shaped graphite layer has a unique microstructure, so that the wettability of the current collector to liquid metal lithium is improved, and the charging and discharging stability is improved. The liquid metal battery assembled by taking the graphite @ nickel-based alloy foam composite material as the negative current collector has excellent rateperformance and cycle performance.

Description

technical field [0001] The invention belongs to the technical field of battery material preparation, and in particular relates to a high-performance liquid metal battery negative electrode current collector and a preparation method thereof. Background technique [0002] Large-scale stationary energy storage systems play an important role in enhancing the integration of renewable energy sources such as solar and wind power, and are also critical to improving grid reliability and utilization. Liquid metal battery is an emerging battery energy storage technology for grid-level energy storage applications. Because of its many advantages such as low material cost, simple manufacturing process, high energy density and long cycle life, it has received great attention in energy storage technology research and energy investment. widespread attention in the field. [0003] However, since the liquid metal battery requires the positive and negative electrodes and the electrolyte to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/80H01M10/38H01M10/39
CPCH01M4/662H01M4/663H01M4/667H01M4/808H01M10/38H01M10/399H01M2004/027Y02E60/10Y02P70/50
Inventor 赵海雷褚鹏王捷谢宏亮韩崇祺李兆麟杨朝
Owner UNIV OF SCI & TECH BEIJING
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