Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of magnesium alloy anode material for seawater battery and preparation method thereof

An anode material, seawater battery technology, applied in battery electrodes, immersed batteries, circuits, etc., can solve the problems of difficult anode material processing, fast corrosion rate, etc., to reduce the tendency of galvanic corrosion, easy to dissolve, grain refinement Effect

Active Publication Date: 2022-07-22
HOHAI UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems that magnesium alloys are used as anode materials for seawater batteries, the processing is difficult and the corrosion rate is fast, especially the magnesium alloys with the addition of Ca elements cannot overcome the problem of accelerated corrosion due to the increase in the number of cracks in magnesium alloys. The present invention proposes a A kind of magnesium alloy anode material for seawater battery and preparation method thereof

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of magnesium alloy anode material for seawater battery and preparation method thereof
  • A kind of magnesium alloy anode material for seawater battery and preparation method thereof
  • A kind of magnesium alloy anode material for seawater battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Weigh the raw materials with AZ31 (Mg-3.48wt.%Al-0.99wt.%Zn-0.46wt.%Mn), pure magnesium (99.95wt%), Mg-20wt.%Ca raw materials. in CO 2 (99vol%) and SF 6 Under the protective atmosphere of (1vol%) mixed gas, the smelting temperature is 700-720 ° C, the raw materials are completely melted and stirred, and after standing for 10 minutes, they are poured into a steel mold to obtain a massive magnesium alloy anode material ingot, denoted as AZ31 -1.0Ca;

[0029] 2) Use a wire electric discharge machine to cut a rectangular ECAP sample with a size of 45×20×20mm and heat the ECAP mold to 300-310°C, then put the magnesium alloy sample evenly coated with graphite milk into the mold and keep it warm for 10min , followed by 8 passes of ECAP processing; the ECAP mold cavity used is a "cross" shape, and reciprocating processing can be achieved by rotating 90° during processing to obtain a uniform and refined structure. The resulting anode material was designated as AZ31-1.0Ca 8...

Embodiment 2

[0031] 1) Take AZ31 (Mg-3.48wt.%Al-0.99wt.%Zn-0.46wt.%Mn), pure magnesium (99.95wt%), Mg-20wt.%Ca as raw materials, and weigh the raw materials. in CO 2 (99vol%) and SF 6 Under the protective atmosphere of (1vol%) mixed gas, the melting temperature is 700-720 ° C, the raw materials are completely melted and stirred, and after standing for 10 minutes, they are poured into a steel mold to obtain a massive magnesium alloy anode material ingot;

[0032] 2) Use a wire electric discharge machine to cut a rectangular ECAP sample with a size of 45×20×20mm and heat the ECAP mold to 300-310°C, then put the magnesium alloy sample evenly coated with graphite milk into the mold and keep it warm for 10min , followed by 12 passes of ECAP processing, and the resulting anode material was denoted as AZ31-1.0Ca 12p.

[0033] performance analysis

[0034] like figure 1 As shown, after alloying with 1.0 wt.% Ca, a network of (Mg, Al) precipitated along the grain boundaries was formed in the AZ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
discharge efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses a magnesium alloy anode material for a seawater battery and a preparation method thereof, including the following steps: S1: under a protective atmosphere, a magnesium alloy raw material containing Ca element is melted at a temperature higher than 700 DEG C, and then Casting water-cooled to obtain as-cast magnesium alloy; S2: processing the as-cast magnesium alloy material by an equal channel angular extrusion process, and water-cooling after the treatment to obtain a deformed fine-grained magnesium alloy; S3: the deformed fine-grained magnesium alloy The surface layer is excised to obtain magnesium alloy anode materials for seawater batteries. The method of the invention can meet the requirements of environmental protection and economy in the production of magnesium alloys, and the (Mg, Al) in the alloy can be made through the ECAP process in the later stage. 2 The Ca phase is broken and dispersed, which can effectively reduce the tendency of galvanic corrosion between the precipitated phase and the magnesium matrix, and at the same time, the grains are refined, which is beneficial to the improvement of the discharge efficiency.

Description

technical field [0001] The invention belongs to the field of anode materials for seawater batteries, and in particular relates to a magnesium alloy anode material for seawater batteries and a preparation method thereof. Background technique [0002] Magnesium alloys have attracted much attention as anode materials for seawater batteries due to their good discharge performance. Magnesium has a relatively negative electrode potential of -2.37V, which is lower than that of aluminum and zinc, showing higher discharge activity; the faradaic capacity of magnesium is high, 2.205A·h / g, although lower than that of lithium (3.862A·h / g) and aluminum (2.980A·h / g), but much higher than zinc (0.820A·h / g); meanwhile, the density of magnesium is 1.74g / cm 2 , lower than aluminum (2.70g / cm 2 ) and zinc (7.14g / cm 2 ), which is beneficial to the weight reduction of the battery system, thereby achieving high energy density delivery; in addition, magnesium is rich in resources, low in price, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/46H01M6/34C22C1/03C22C23/00C22F1/06
CPCH01M4/466H01M6/34C22C1/03C22C23/00C22F1/06
Inventor 马爱斌谢秋媛江静华刘欢宋丹
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com