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

Method for activating ferric ferricyanide and zinc ion battery prepared by method

A zinc-ion battery, iron ferricyanide technology, applied in battery electrodes, secondary batteries, electrolyte immobilization/gelation, etc., can solve the problem of low rate performance, specific capacity blocking PBA-cathode, rate performance capacity reduction, etc. problems, to achieve the effects of high ionic conductivity, excellent antifreeze function, and excellent cycle stability

Active Publication Date: 2020-11-06
香港城市大学深圳研究院
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these PBA-type cathodes, such as cyanoferric hexacyanoferrate (FeHCF), suffer from short lifetime, low rate capability, and low operating voltage.
Significant specific capacity decay within short lifetime ≤ 1000 cycles prevents practical application of PBA-cathode
In addition, compared with the initial current density, at a current density of about 1 A g -1 , the ratecapability even experienced a severe capacity reduction of up to 50%
The insufficient lifetime and lower rate performance are attributed to the limited utilization of redox-active sites (Fe(III / II)), which is caused by the close-fitting effect exerted by six cyano groups per unit

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
  • Method for activating ferric ferricyanide and zinc ion battery prepared by method
  • Method for activating ferric ferricyanide and zinc ion battery prepared by method
  • Method for activating ferric ferricyanide and zinc ion battery prepared by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides an antifreeze gel electrolyte, which is prepared through the following steps:

[0044] 1) Prepare 15mL 21M high-concentration bistrifluoromethanesulfonimide zinc-lithium electrolyte;

[0045] 2) Add 3 g of acrylamide to the high-concentration bistrifluoromethanesulfonimide zinc-lithium electrolyte, and stir at room temperature for 30 minutes;

[0046] 3) After adding 0.5 mg ammonium persulfate and 0.2 mg dimethylacrylamide, stir at room temperature for 30 min;

[0047] 4) Inject the product of step 3) into an ordinary glass mold, and place it in an oven at 70°C for 2 hours of polymerization;

[0048] 5) Remove the mold to obtain the final antifreeze gel electrolyte.

[0049] The present embodiment provides a kind of activation method of ferricyanide, it may further comprise the steps:

[0050] (1) The newly assembled Zn-FeHCF battery was left to stand at room temperature for 1 hour, wherein the electrolyte was the antifreeze gel electrolyte p...

Embodiment 2

[0056] The present embodiment provides a kind of activation method of ferricyanide, it may further comprise the steps:

[0057] (1) The newly assembled Zn-FeHCF battery was left to stand at room temperature for 1 hour, and the electrolyte was the antifreeze gel electrolyte prepared in embodiment 1;

[0058] (2) After standing still, perform a high-voltage scan on the Zn-FeHCF battery on the blue battery test system, with a current density of 2A g -1 , the voltage upper limit is 2.3V;

[0059] (3) After the high-voltage scan, the Zn-FeHCF battery is programmed to stand still on the blue electric battery test system, and the standstill time is 1s;

[0060] (4) After the program is left still, the Zn-FeHCF battery is programmed to discharge on the blue electric battery test system, and the current density is 1A g -1 , the voltage lower limit is 0.01V; the battery completes a high-voltage scanning cycle after programmed discharge, and continues for 260 cycles to complete the act...

Embodiment 3

[0063] The present embodiment provides a kind of activation method of ferricyanide, it may further comprise the steps:

[0064] (1) The newly assembled Zn-FeHCF battery was left to stand at room temperature for 1 hour, and the electrolyte was the antifreeze gel electrolyte prepared in embodiment 1;

[0065] (2) After standing still, perform a high-voltage scan on the Zn-FeHCF battery on the blue electric battery test system, and the current density is 1A g -1 , the voltage upper limit is 2.3V;

[0066] (3) After the high-voltage scan, the Zn-FeHCF battery is placed on the blue electric battery testing system, and the standing time is 5s;

[0067] (4) After the program is left still, the Zn-FeHCF battery is programmed to discharge on the blue electric battery test system, and the current density is 1A g -1 , the voltage lower limit is 0.01V; the battery completes a high-voltage scanning cycle after programmed discharge, and continues for 500 cycles to complete the activation ...

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

No PUM Login to View More

Abstract

The invention provides a method for activating ferric ferricyanideand a zinc ion battery prepared by the method. The method comprises the following steps ofcarrying out high-voltage scanning on a Zn-FeHCF battery, after high-voltage scanning, carrying out program standing on the Zn-FeHCF battery, carrying out program discharging on the Zn-FeHCF battery after the Zn-FeHCF battery is subjected to program standing,and completing a high-voltage scanning period after the battery is subjected to program discharge, and continuously carrying out 100-1000 periods to complete the activation. The invention also provides a zinc ion battery adopting the ferric ferricyanide activated by the method as a cathode. According to the activation method disclosed by the invention, an electrochemical more stablestructure is generated, so that the Zn-FeHCF battery can realize the cycle performance of creating records with a relatively high capacity retention rate after an ultra-long cycle.

Description

technical field [0001] The invention relates to a method for activating ferricyanide and a zinc ion battery prepared therefrom, belonging to the technical field of batteries. Background technique [0002] Zinc ion batteries (Zinc ion batteries, ZIBs), which store divalent zinc ions in the cathode body, are being intensively studied due to the high energy density and inherent safety of metallic zinc anodes. Zinc has a favorable plating / stripping voltage (approximately -0.76V vs SHE) and is electrochemically stable in water, which enables ZIBs to avoid the use of toxic organic electrolytes and complex assembly in glove boxes compared to their lithium and sodium counterparts process. This advantage of the zinc anode has led researchers to pay more attention to the development of cathode host materials. Among these materials, MnO with various crystalline phases has been developed 2 Based on the cathode, the Mn(IV) / Mn(III)-based single-electron transfer reaction provides high ...

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
IPC IPC(8): H01M4/58H01M10/36
CPCH01M4/5825H01M10/36H01M2300/0085Y02E60/10
Inventor 支春义杨琪唐子杰梁国进
Owner 香港城市大学深圳研究院
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