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Positive electrode material for liquid-solid metal battery

A positive electrode material and metal battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high cost, high working temperature, low voltage, etc., and achieve the effect of reducing energy costs and long service life

Active Publication Date: 2014-10-29
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a positive electrode material for liquid-solid metal batteries, which can solve the problems of high cost, low voltage and high operating temperature of all liquid metal batteries

Method used

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  • Positive electrode material for liquid-solid metal battery
  • Positive electrode material for liquid-solid metal battery
  • Positive electrode material for liquid-solid metal battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The cathode material of the present invention is composed of metallic bismuth and metallic lead, and the mole percentage of metallic bismuth and metallic lead is 50:50.

[0034] In the liquid-solid metal battery of this embodiment, the negative electrode material adsorbed in the negative electrode current collector 3 is metal lithium, and the molar ratio of the negative electrode material to the positive electrode material is 0.6:0.4, and the electrolyte is a low melting point mixture composed of LiCl, LiF and LiBr Salt, and the mole percentage of LiCl, LiF and LiBr is 23:21:56.

[0035] The working temperature of the liquid-solid metal battery in this embodiment is 550°C. During the discharge process, the positive electrode composition is figure 2 The direction of the dashed arrow in the phase diagram changes. When fully discharged, the composition of the positive electrode material is in the liquid-solid two-phase region of the alloy phase diagram of the positive and nega...

Embodiment 2

[0037] The positive electrode material of this embodiment is composed of metallic bismuth, metallic antimony and metallic lead; and the mole percentage of metallic bismuth, metallic antimony and metallic lead is 33.4:33.3:33.3.

[0038] In the liquid-solid metal battery of this embodiment, the negative electrode material adsorbed in the negative electrode current collector 3 is metal lithium, the molar ratio of the negative electrode material to the positive electrode material is 0.6:0.4, the electrolyte is a mixed salt composed of LiCl, LiF and LiBr, and LiCl The mole percentage of LiF and LiBr is 23:21:56.

[0039] The working temperature of the liquid-solid metal battery in this embodiment is 550°C. When fully discharged, the composition of the positive electrode is in the liquid-solid two-phase region of the alloy phase diagram of the positive and negative materials. Figure 5 Shows the voltage change of the liquid-solid metal battery of Example 2 during charging and dischargin...

Embodiment 3

[0042] The cathode material of this embodiment is composed of metallic bismuth and metallic antimony, and the mole percentage of metallic bismuth and metallic antimony is 67:33.

[0043] The positive electrode material in the liquid-solid metal battery of this embodiment is selected from the positive electrode material in this embodiment. The electrolyte is a mixed salt of LiCl and LiF, and the molar ratio of LiCl and LiF is 70:30. The same for solid metal batteries.

[0044] The working temperature of the liquid-solid metal battery in this embodiment is 600°C, the discharge voltage is 0.67V, and the energy cost is only 972 yuan / kWh.

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Abstract

The invention discloses a positive electrode material for a liquid-solid metal battery, which further solves the problems of high cost, low voltage, high working temperature and the like of the existing full liquid metal battery based on the advantages of low cost and high volume of the liquid-solid metal battery. The positive electrode material is formed by metallic bismuth and other metal; other metal is one or two of antimony, lead and tin. In the process of assembling the battery, a positive electrode in a full discharge state is in liquid-solid phase zones of an positive electrode and negative electrode material alloy phase diagram through the consumption proportion of positive electrode and negative electrode materials. The positive electrode material fully utilizes the advantages of low cost, high volume and long service life of the liquid-solid metal battery, and also combines the advantages of the positive electrode materials such as metallic bismuth, antimony, lead or tin in the aspects of potential, melting point and price, so that excellent comprehensive performance of high voltage, low cost, low working temperature and the like can be achieved.

Description

Technical field [0001] The invention belongs to the field of positive electrode materials for energy storage batteries, and particularly relates to a positive electrode material for liquid-solid metal batteries. Background technique [0002] At present, wind power and solar photovoltaic power generation have received extensive attention and a large number of research applications due to their clean and renewable advantages. However, limited by natural conditions, the intermittent shortcomings of wind and solar energy make it impossible to continuously provide stable power output, which largely limits their grid-connected promotion and application. In addition, when power is supplied to the power grid, there is a misalignment of supply in peak hours and oversupply in low peak hours. This will not only cause a large amount of waste of electrical energy, but also adversely affect the stability of the power grid. In response to these problems, large-scale electrical energy storage t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M10/39
CPCH01M4/38H01M10/399Y02E60/10
Inventor 宁晓辉杨烈代涛单智伟
Owner XI AN JIAOTONG UNIV