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A lithium-nitrogen secondary battery electrode and lithium-nitrogen secondary battery

A secondary battery, nitrogen technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unsatisfactory nitrogen fixation product concentration, poor economy, expensive equipment and drugs, etc.

Active Publication Date: 2019-09-13
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have realized the nitrogen fixation process under normal temperature and pressure, the concentration of the nitrogen fixation product is not ideal, and the equipment and medicines required for the nitrogen fixation reaction are expensive and economically poor.

Method used

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  • A lithium-nitrogen secondary battery electrode and lithium-nitrogen secondary battery
  • A lithium-nitrogen secondary battery electrode and lithium-nitrogen secondary battery
  • A lithium-nitrogen secondary battery electrode and lithium-nitrogen secondary battery

Examples

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preparation example Construction

[0058] The present invention has no special limitation on the preparation process of the positive electrode of the lithium-nitrogen secondary battery. Those skilled in the art can select and adjust according to actual production conditions, raw material conditions and product requirements. The positive electrode of the lithium-nitrogen secondary battery described in the present invention The preparation process is preferably:

[0059] First, the carbon cloth is acid-activated with strong acid, washed and dried, then installed in a porous stainless steel sheet, pressed tightly, and used as the positive electrode of the battery.

[0060] In order to improve the electrochemical performance of the lithium-nitrogen secondary battery and better realize artificial nitrogen fixation, the positive electrode preferably includes an active material, or a mixed material of an active material and a binder. The active material, or the mixed material of the active material and the binder, is ...

Embodiment 1

[0079] This embodiment provides a lithium-nitrogen rechargeable battery that can be used for artificial nitrogen fixation, and its structure can be referred to figure 1 As shown, the positive electrode gas (i.e. working gas) used in this embodiment is nitrogen, and the battery number of this embodiment is marked as A1, and its structure includes:

[0080] The negative electrode is composed of metal lithium sheet and stainless steel sheet;

[0081] The gas positive electrode in this embodiment is only composed of carbon cloth. The carbon cloth can act as a current collector and an active material at the same time, and provide electrons to the positive electrode gas. The working gas is nitrogen.

[0082] The electrode interstitial is located between the nitrogen positive electrode (gas positive electrode) and the lithium sheet negative electrode, which is used to isolate the working gas from the negative electrode, and at the same time enables lithium ions to conduct between the...

Embodiment 2

[0094] This embodiment provides a lithium-nitrogen rechargeable secondary battery, denoted as A2, whose structure is basically the same as that of the battery provided in Example 1, except that the structure of the gas electrode is different. The gas positive electrode in this embodiment is only composed of carbon paper. The carbon paper can simultaneously act as a current collector and an active material, and provide electrons to the positive electrode gas. The working gas is nitrogen.

[0095] The gas positive electrode in this example can be made by the following method: first place the carbon paper in a concentrated nitric acid solution at 140°C for 12 hours, then wash it three times with distilled water, absolute ethanol, and acetone, and cut the carbon paper into diameters For a 16mm wafer, dry it in a vacuum oven at 80°C for 24 hours. Finally, the dried carbon paper was placed in a porous stainless steel sheet and compressed under a pressure of 10 MPa to serve as the po...

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Abstract

The invention provides a lithium-nitrogen secondary battery electrode, which includes a positive electrode and a negative electrode; the negative electrode includes metal lithium; the positive electrode includes a current collector; the current collector includes metal and / or conductive carbon material. The present invention provides a lithium-nitrogen secondary battery, comprising the electrode, electrolyte and diaphragm described in any one of the above technical solutions. The invention proposes an electrochemical high-efficiency artificial nitrogen fixation method based on a lithium-nitrogen rechargeable battery. Nitrogen is used to consume nitrogen in the discharge process and release nitrogen in the charge process to realize the cycle of nitrogen and provide electrical energy to the outside. The discharging and charging processes of the lithium-nitrogen secondary battery of the present invention are relatively independent, which not only reduces the charging potential, but also improves the cycle times and cycle efficiency of the battery. The invention expands the new method of artificial nitrogen fixation, fills the gap in the technical field of lithium-nitrogen secondary batteries, has high atomic utilization rate, meets the requirements of green chemistry, and is beneficial to the circular storage and utilization of large-scale renewable energy.

Description

technical field [0001] The invention relates to the technical field of electrochemical nitrogen fixation, and relates to a lithium-nitrogen secondary battery electrode and a lithium-nitrogen secondary battery. Background technique [0002] Lithium batteries have the advantages of high working voltage, high specific energy, long cycle life, light weight, less self-discharge, no memory effect, and high cost performance. They have become rechargeable power supplies for high-power electric vehicles, artificial satellites, aerospace and other fields. The main choice of objects. Therefore, lithium batteries and related materials have become a research hotspot for researchers. Electrode material is one of the key materials of lithium batteries, which determines the direction of lithium batteries. At present, the electrode materials of conventional lithium batteries, such as positive electrode materials, include lithium cobaltate, lithium nickelate, lithium manganate, lithium iron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M4/583H01M4/62H01M4/36H01M10/0525
CPCH01M4/362H01M4/38H01M4/583H01M4/62H01M10/0525Y02E60/10
Inventor 张新波鲍迪马金玲徐吉静徐丹
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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