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High-voltage magnesium charge-discharge battery

A charge-discharge, high-voltage technology, applied in the field of electrochemistry, can solve the problems of high cathode production cost, low battery operating voltage, and low energy density.

Inactive Publication Date: 2013-11-27
FUDAN UNIV
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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-voltage magnesium charge-discharge battery to overcome the problems of low operating voltage, low energy density, difficulty in finding and developing a matching electrolyte and positive electrode material system, and high production cost of the positive electrode.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] LiCoO with metallic platinum as the negative electrode current collector and a reversible capacity of 145 mAh / g 2 It is the active material of the positive electrode, wherein the weight ratio of the conductive agent, the binder, and the active material is 1:1:8. After stirring into a uniform slurry, it is coated on a stainless steel mesh to form a positive electrode piece. Take the component as 19.75Li 2 O-6.17Al 2 O 3 -37.04GeO 2 -37.04P 2 O 5 (Lithium-containing inorganic oxide) The ceramic membrane is a separator, the negative side is a mixture of THF and the grating reagent EtMgBr and LiBr, and the positive side is 1 mol / L LiNO 3 Solution. After sealing, get LiCoO 2 A magnesium charge-discharge battery with positive electrode and magnesium as negative electrode. At 0.1 mA / cm 2 The current is tested, and the charge is 0.1 mA / cm 2 Perform constant current charge, charge to 3.6V; discharge current is 0.1 mA / cm 2 , The termination voltage is 2.8 V. According to the test...

Embodiment 2

[0030] LiMn with a reversible capacity of 115 mAh / g with metallic silver as the negative electrode current collector 2 O 4 It is the active material of the positive electrode, and the ratio of the conductive agent, the binder, and the active material is the same as that of Example 1. After being stirred into a uniform slurry, it is coated on a stainless steel mesh to form a positive electrode piece. The all-solid membrane (all-solid polymer electrolyte containing lithium salt) composed of 8wt.% LiTFSI + 5wt.% Nafion 117 (product of DuPont) + 87wt.% PEO is used as the separator, and the negative electrode side is LiPF 6 , PMMA, PC, EC, Mg(SO 3 CF 3 ) 2 Polymer electrolyte, the positive side is 2 mol / l LiNO with 1 wt.% lithium polyacrylate dissolved 3 Aqueous solution. After sealing, get LiMn 2 O 4 Magnesium charge-discharge battery with positive pole and negative pole. The test conditions are the same as in Example 1. According to the test results, the average discharge voltage ...

Embodiment 3

[0032] LiFePO with a reversible capacity of 140 mAh / g with metallic copper as the negative electrode current collector 4 It is the active material of the positive electrode, and its conductive agent, binder, and solvent are the same as in Example 1. After stirring into a uniform slurry, it is coated on a stainless steel mesh to form a positive electrode piece. Take the component as 0.75Li 2 O-0.3Al 2 O 3 -0.2SiO 2 -0.4P 2 O 5 -0.1TiO 2 (Lithium-containing inorganic oxide) The ceramic membrane is a separator, the negative electrode side is a mixture of THF, Grignard reagent and LiBr, and the positive electrode side is 0.5 mol / L Li 2 SO 4 Aqueous electrolyte. After sealing, get LiFePO 4 A magnesium charge-discharge battery with positive electrode and magnesium as negative electrode. At 0.1 mA / cm 2 The current is tested, and the charge is 0.1 mA / cm 2 Charge with constant current, charge to 3.5 V; discharge current is 0.1 mA / cm 2 , The termination voltage is 1.6V. According to the...

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Abstract

The invention belongs to the technical field of electrochemistry and particularly relates to a high-voltage magnesium charge-discharge battery. The high-voltage magnesium charge-discharge battery consists of a membrane, a cathode, an anode and an electrolyte, wherein the membrane is solid and lithium ions can pass through the membrane reversibly; the cathode is magnesium metal or magnesium alloy, the electrolyte which is in the side of the cathode is a common organic electrolyte, a polymer electrolyte, an ionic liquid electrolyte or a mixture thereof, the anode is a common anode material for a lithium ion battery, and the electrolyte which is in the side of the anode is an aqueous solution containing lithium salt or a hydrogel electrolyte. The magnesium charge-discharge battery can be used for solving the matching problem between the electrolyte and anode material of the existing magnesium charge-discharge battery and other problems, and has the advantages of high voltage and high energy density by compared with the traditional magnesium charge-discharge battery. The magnesium charge-discharge battery with high energy density can be used for storing and releasing electric power.

Description

Technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to a high-voltage magnesium charge-discharge battery. The invention also relates to the application of the magnesium charge-discharge battery. Background technique [0002] Today, when fossil energy is depleted, environmental pollution is increasingly serious, and the global climate is warming, energy and environment are increasingly becoming two major issues of human concern. In order to achieve sustainable development, the development and utilization of new energy has become an important strategic goal of all countries in the world. Among them, electrochemical energy has become one of the most important research topics due to its advantages of high energy conversion efficiency and energy density, no noise pollution, free combination and movement. Chemical power sources have been developed and utilized in high-tech devices, green and low-energy transportation, and r...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M4/46H01M10/056H01M50/411H01M50/417H01M50/431
CPCY02E60/12Y02E60/10
Inventor 常郑杨亚琼刘丽丽吴宇平
Owner FUDAN UNIV
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