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

Modified sodium manganate material as well as preparation method and application thereof

A technology of sodium manganate and sodium salt, applied in the field of preparation of water-based ion batteries, can solve problems such as poor cycle stability of water-based batteries, and achieve the effects of easy mass production, low cost and good repeatability

Pending Publication Date: 2022-06-24
RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a modified sodium manganate material and its preparation method and application, in order to solve the existing dissolution phenomenon of manganese oxide as the positive electrode material, which causes the circulation of the aqueous battery Technical issues with poor stability

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
  • Modified sodium manganate material as well as preparation method and application thereof
  • Modified sodium manganate material as well as preparation method and application thereof
  • Modified sodium manganate material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of modified sodium manganate material, comprising the following steps:

[0041] Step 1: The tetra-n-butoxide titanium (IV) (C 16 H 36 O 4 Ti, Ti=0.11), anhydrous sodium carbonate (Na2 CO 3 ), manganese acetate tetrahydrate ((CH 3 COO) 2 Mn·4H 2 O) and citric acid were mixed and dissolved in ultrapure water, heated at 80 °C for 4 h, stirred evenly, and then evaporated deionized water to obtain a gel; the molar ratio of coupling agent to the metal ion in the transition metal salt was 1;

[0042] The molar ratio of sodium salt to transition metal salt is 0.51; the molar ratio of titanium salt to manganese salt is 0.11;

[0043] Step 2: put the gel into a preheated oven at 80°C and dry for 12 hours, and obtain a powdered precursor after drying;

[0044] Step 3: After grinding the powdered precursor, put it into a tube furnace for firing at 300°C for 8 hours in an air atmosphere, perform the first firing treatment, and then burn it at 900°C for 9 ...

Embodiment 2

[0046] A preparation method of modified sodium manganate material, comprising the following steps:

[0047] Step 1: The tetra-n-butoxide titanium (IV) (C 16 H 36 O 4 Ti, Ti=0.22), anhydrous sodium carbonate (Na 2 CO 3 ), manganese acetate tetrahydrate ((CH 3 COO) 2 Mn·4H 2 O) and citric acid were mixed and dissolved in ultrapure water, heated at 80°C for 5h, stirred evenly, evaporated deionized water to obtain gel; the molar ratio of coupling agent to metal ions in transition metal salt was 1;

[0048] The molar ratio of sodium salt to transition metal salt is 0.51; the molar ratio of titanium salt to manganese salt is 0.22;

[0049] Step 2: put the gel into a preheated oven at 80°C and dry for 12 hours, and obtain a powdered precursor after drying;

[0050] Step 3: After grinding the powdered precursor, put it into a tube furnace for firing at 300°C for 8 hours in an air atmosphere, perform the first firing treatment, and then burn it at 900°C for 9 hours after grindi...

Embodiment 3

[0052] A preparation method of modified sodium manganate material, comprising the following steps:

[0053] Step 1: The tetra-n-butoxide titanium (IV) (C 16 H 36 O 4 Ti, Ti=0.33), anhydrous sodium carbonate (Na 2 CO 3 ), manganese acetate tetrahydrate ((CH 3 COO) 2 Mn·4H 2 O) and citric acid were mixed and dissolved in ultrapure water, heated at 80 °C for 12 h, stirred evenly, and evaporated deionized water to obtain a gel;

[0054] Among them, the molar ratio of the coupling agent to the metal ion in the transition metal salt is 1; the molar ratio of the sodium salt to the transition metal salt is 0.51; the molar ratio of the titanium salt to the manganese salt is 0.33;

[0055] Step 2: put the gel into a preheated oven at 80°C and dry for 12 hours, and obtain a powdered precursor after drying;

[0056] Step 3: After grinding the powdered precursor, put it into a tube furnace for firing at 300°C for 8 hours in an air atmosphere, perform the first firing treatment, and...

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 discloses a modified sodium manganate material as well as a preparation method and application thereof, belongs to the technical field of aqueous ion battery preparation, and solves the technical problem of poor cycling stability of an aqueous battery due to a dissolution phenomenon existing when manganese oxide is used as a positive electrode material in the prior art. According to the preparation method of the modified sodium manganate material disclosed by the invention, pure-phase sodium manganate is prepared by using a coupling agent assisted sol-gel method, and doping treatment is performed at the Mn site through different transition metals on the basis of preparing the pure-phase sodium manganate, so that the crystal stability and the electrochemical performance are improved. The modified sodium manganate prepared by the method is used as a positive electrode material of an aqueous ion battery, and has good cycle stability.

Description

technical field [0001] The invention belongs to the technical field of preparation of aqueous ion batteries, and particularly relates to a modified sodium manganate material and a preparation method and application thereof. Background technique [0002] Among all the current secondary battery systems, lithium-ion batteries undoubtedly occupy a dominant position, and have been widely used in various fields of people's daily life such as electric vehicles and portable electronic products. However, due to the scarcity of lithium resources and inherent problems such as toxic and flammable organic electrolytes, lithium-ion battery systems cannot meet the needs of the growing field of large-scale energy storage applications. Aqueous zinc-ion batteries are uniquely attractive due to the following advantages: (1) Appropriate working potential: The standard redox potential of zinc (Zn) metal is -0.76V, which is higher than the hydrogen evolution potential of aqueous electrolytes and ...

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 Applications(China)
IPC IPC(8): C01G45/12H01M4/505
CPCC01G45/12C01G45/1228H01M4/505C01P2002/72C01P2004/03C01P2004/62C01P2006/40Y02E60/10
Inventor 张皝王凯迪谈小平郭高丽
Owner RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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