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An aqueous zinc-manganese single-flow battery

A flow battery, zinc-manganese single technology, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve problems such as low capacity, and achieve the effects of fast charging and discharging rate, simple manufacturing process, and high specific capacity

Active Publication Date: 2018-08-17
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery uses manganese oxide as the positive electrode active material, zinc as the negative electrode active material, and an aqueous solution containing zinc ions as the electrolyte. This battery is cheap and environmentally friendly, but its capacity is low, only 200-300mAh g -1
At the same time, a series of patents have been applied for improving the positive / negative electrode, but the problem of low capacity has not been fundamentally solved

Method used

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  • An aqueous zinc-manganese single-flow battery
  • An aqueous zinc-manganese single-flow battery
  • An aqueous zinc-manganese single-flow battery

Examples

Experimental program
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Embodiment 1

[0022] Positive electrode preparation: conductive agent acetylene black, active material, and binder PTFE are uniformly mixed according to the mass ratio of 10:85:5 to prepare a slurry, which is evenly scraped on the stainless steel net collector by wet scraping, and dried , rolling, and cutting, it can be used as the positive electrode of the zinc-manganese single flow battery.

Embodiment 2

[0024] Negative electrode preparation: Roll the copper strip to about 50um, and use a punching machine to make holes with a diameter of 20-30um on the copper strip to obtain a perforated copper strip with a porosity of 20-50%, and then punch the copper strip. Galvanized. Properly cutting the galvanized punched copper strip can be used as a negative electrode collector for a zinc-manganese single flow battery in a neutral aqueous medium. It can also be used after electroplating galvanized tin alloy.

Embodiment 3

[0026] Electrolyte preparation: weigh ZnSO 4 161g, MnSO 4 75g, 142g of sodium sulfate was dissolved in 500mL of deionized water. Weigh 5g of cetyltrimethylammonium bromide, 5g of polyethylene glycol and 5g of BiCl 3 Dissolve in 300mL water. The above two solutions were mixed evenly, and the fixed volume was 1L. Prepare an appropriate amount of electrolyte and place it in the electrolyte storage tank.

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Abstract

The invention relates to a water-based zinc-manganese single flow battery; a positive electrode active material is an oxide of manganese, a metal composite oxide, a metal oxide or a carbon material, a negative electrode is a zinc electrode, an electrolyte solution is a nearly neutral aqueous solution containing a zinc salt and a manganese salt, positive electrode active ions and negative electrode active ions can coexist in one electrolyte solution, and an ion exchange membrane is not required for separating the positive electrode and the negative electrode; in processes of charging and discharging, the electrolyte solution constantly flows between an electrolyte solution storage tank and an electric pile through a pipeline under pushing of a liquid pump. During charging, zinc ions are deposited onto a negative electrode current collector from the electrolyte solution, the zinc ions and manganese ions are co-embedded into the positive electrode active substance at the same time, and the manganese ions are subjected to oxidation deposition; during discharging, the negative electrode deposited zinc is dissolved into the electrolyte solution, and the positive electrode manganese oxide is partially reduced and dissolved and is extricated to the electrolyte solution with the zinc ions simultaneously. The battery has the outstanding characteristics of simple manufacture, relatively high specific energy and specific power, low cost, long cycle life, environmental friendly and the like, and is widely applied in electric power, transportation, electronics and other fields.

Description

technical field [0001] The invention relates to a water-system zinc-manganese single-fluid flow battery and a preparation method thereof, belonging to the field of secondary batteries. Background technique [0002] The development of renewable energy, the development of distributed power supply technology, and the construction of smart grids to reduce human dependence on fossil energy have put forward higher and larger-scale realistic demands on electric energy storage technology. Flow battery is a new type of chemical power storage system suitable for large-scale storage. Different from the active material contained in the solid-state electrode of the usual battery, the active material of at least one electrode of the flow battery is dissolved in the circulating electrolyte, and the electrolyte is placed in an external independent liquid storage tank, and it flows through the liquid delivery pump. over battery. The design of the liquid flow battery is flexible, easy to co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 文越华程杰潘君丽徐良申亚举赵鹏程徐艳曹高萍杨裕生
Owner NO 63971 TROOPS PLA
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