Modified sodium ion battery cobalt-free positive electrode material, preparation method thereof, and sodium ion battery

A technology for sodium-ion batteries and positive electrode materials, applied in battery electrodes, active material electrodes, positive electrodes, etc., can solve the problems of poor structural stability, high cost of positive electrode materials, long-term cycle stability and poor rate performance, etc. Increase, improve capacity and rate performance, improve the effect of long-term cycle stability

Pending Publication Date: 2021-12-28
SVOLT ENERGY TECHNOLOGY CO LTD
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a modified sodium-ion battery cobalt-free positive electrode material, its preparation method and sodium-ion battery, to solve the problem that the cost of the existing sodium-ion battery positive electrode material is high, and its structural stability is poor, resulting in its long-term effect. Issues with poor cycle stability and rate performance

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 ion battery cobalt-free positive electrode material, preparation method thereof, and sodium ion battery
  • Modified sodium ion battery cobalt-free positive electrode material, preparation method thereof, and sodium ion battery
  • Modified sodium ion battery cobalt-free positive electrode material, preparation method thereof, and sodium ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] As described in the background technology, to solve the problems of high cost and poor structural stability of the existing anode materials for sodium-ion batteries, which lead to the problems of long-term cycle stability and poor rate performance. In order to solve the above technical problems, the application provides a method for preparing a cobalt-free cathode material for a modified sodium-ion battery. The preparation method for a cobalt-free cathode material for a modified sodium-ion battery includes: The dopant is subjected to the first sintering treatment to obtain the first sintered product, wherein the dopant can be represented by the following chemical formula: M c D. d , wherein the M element is selected from one of the elements in Group IA, Group IIA, Group IIIA, Group IIIB, Group IVB, Group VB or Group VIB, and the element D is selected from Group IIIA, Group III One of the elements in Group VA or Group VIIA.

[0023]Through the above-mentioned first sin...

Embodiment 1

[0044] Weigh Na respectively according to the molar ratio of Na, Ni, Mn, W, B contained in the ratio of 0.67:0.8:0.192:0.008:0.008 2 CO 3 , NiO, Mn 3 o 4 and WB, and then mix the above-mentioned raw materials with water to form a suspension. The above suspension was added to a ceramic grinder, and grinded at a speed of 2500r / min for 1.2h to obtain a slurry. The above slurry was spray-dried under the conditions of 180° C. and 0.2 MPa to obtain precursor material powder. Such as figure 1 The precursor material powder shown has a D50 of 100 nm for the primary particles and a D50 of 3.4 μm for the secondary particles.

[0045] The first sintering treatment is carried out on the above-mentioned precursor material powder in an air atmosphere, and the temperature of the first sintering treatment is 860 ° C, and the time is 10 hours. After the first sintering treatment is completed, the product is cooled, crushed, and sieved (screening aperture The size is 38 μm) to obtain the f...

Embodiment 2

[0048] Weigh Na according to the molar ratio of Na, Ni, Mn, Zr, N contained in the ratio of 0.67:0.75:0.244:0.006:0.006 2 CO 3 , NiO, Mn 3 o 4 , ZrN, and then mix the above-mentioned raw materials with water to form a suspension. The above suspension was added to a ceramic grinder, and ground at a speed of 2000r / min for 1 hour to obtain a slurry. The above slurry was spray-dried under the conditions of 180° C. and 0.1 MPa to obtain precursor material powder. The D50 of the primary particle of the precursor material powder was tested to be 350 nm, and the D50 of the secondary particle was 5 μm.

[0049] The above powder is subjected to the first sintering treatment in an air atmosphere, and the temperature of the first sintering treatment is 880° C., and the time is 10 hours. After the first sintering treatment is completed, the product is cooled, crushed, and sieved (the sieve aperture size is 38 μm ) to obtain the first sintered product. The first sintered product obtai...

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 modified sodium ion battery cobalt-free positive electrode material, a preparation method thereof, and a sodium ion battery. The preparation method comprises the following steps: carrying outfirst sintering treatment on a sodium source, a nickel source, a manganese source and a doping agent to obtain a first sintering product, wherein the doping agent can be represented by the following chemical formula: McDd, the element M is selected from one of elements of the IA group, the IIA group, the IIIA group, the IIIB group, the IVB group, the VB group or the VIB group, and the element D is selected from one of elements of the IIIA group, the VA group or the VIIA group; and carrying out second sintering treatment on the first sintered product and a coating agent in an oxygen or air atmosphere to obtain the modified sodium ion battery cobalt-free positive electrode material. The modified sodium ion battery cobalt-free positive electrode material prepared by the method has the advantages of low cost and stable structure, and the long-acting cycle stability, the electrochemical specific capacity and the rate capability of the positive electrode material can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of preparation of sodium-ion battery materials, in particular to a modified cobalt-free positive electrode material for a sodium-ion battery, a preparation method thereof, and a sodium-ion battery. Background technique [0002] In the structural composition of sodium-ion batteries, the positive electrode material, as the main part of sodium storage, plays a decisive role in the safety performance and electrochemical performance of sodium-ion batteries, and determines the future development of sodium-ion batteries. At present, among numerous cathode materials for sodium-ion batteries, layered transition metal oxides have been widely studied due to their high energy density. Layered transition metal oxides also have the following problems: (1) poor storage stability in the air, resulting in high cost in the synthesis of materials, battery assembly, etc.; (2) when the sodium ion battery is charged, the layered ...

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): H01M4/62H01M4/505H01M4/525H01M10/054
CPCH01M4/628H01M4/505H01M4/525H01M10/054H01M2004/028H01M2004/021Y02E60/10
Inventor 潘海龙李子郯杨红新
Owner SVOLT ENERGY TECHNOLOGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap