Sodium-rich P2-phase layered oxide material and preparation method and application thereof

An oxide and layered technology, applied in the field of materials, can solve the problems of sacrificing specific capacity and energy density, affecting the electrochemical performance of materials, and unstable storage for a long time, achieving high working voltage, low cost, and stable cycle.

Active Publication Date: 2015-07-22
BEIJING HINA BATTERY TECH CO LTD
View PDF5 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When charged to 3.8V, the cycle performance of the material becomes poor, and better cycle performance can be obtained at the cut-off of 3.6V, but the specific capacity and energy density are sacrificed at the same time

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
  • Sodium-rich P2-phase layered oxide material and preparation method and application thereof
  • Sodium-rich P2-phase layered oxide material and preparation method and application thereof
  • Sodium-rich P2-phase layered oxide material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 of the present invention provides a sodium-rich P2 phase layered oxide material, whose general chemical formula is: Na 0.72+δ Ni a mn b m c o 2+σ ;

[0049] Wherein, Ni and Mn are transition metal elements, M is an element for doping and replacing the transition metal position, and the M is specifically Mg 2+ , Zn 2+ , Cu 2+ , Mn 2+ ,Co 2+ , Al 3+ , Mn 3+ , Fe 3+ ,Co 3+ , V 3+ , Cr 3+ , Ti 4+ , Zr 4+ , Si 4+ , Sn 4+ , Ru 4+ , Nb 4+ , Mo 4+ One or more of them; the valence state of M is m, and the m is specifically monovalent, divalent, trivalent, tetravalent, pentavalent or hexavalent;

[0050] The δ, a, b, c, σ are the mole percentages of the corresponding elements respectively; the relationship between the δ, a, b, c, σ and m satisfies (0.72+δ)+2a+4b+mc =2(2+σ), and satisfy a+b+c=1; among them, -0.05<δ≤0.08; 0

[0051] in Na 0.72+δ Ni a mn b m c o 2+σ In the structure, Ni, M, and Mn res...

Embodiment 2

[0055] This example provides a method for preparing a sodium-rich P2 phase layered oxide material, specifically a solid phase method, such as figure 2 shown, including:

[0056] Step 201, mixing sodium carbonate with a required stoichiometric amount of 102wt% to 105wt% of sodium and required stoichiometric amounts of manganese dioxide, nickel oxide, and M oxide in proportion to form a precursor;

[0057] Specifically, the M is specifically M is specifically Mg 2+ , Zn 2+ , Cu 2+ , Mn 2+ ,Co 2+ , Al 3+ , Mn 3+ , Fe 3+ ,Co 3+ , V 3+ , Cr 3+ , Ti 4+ , Zr 4+ , Si 4+ , Sn 4+ , Ru 4+ , Nb 4+ , Mo 4+ one or more of.

[0058] Step 202, using a ball milling method to uniformly mix the precursor, or stir the precursor in a volatile organic solvent and then completely volatilize the organic solvent to obtain a precursor powder;

[0059] In step 203, the precursor powder is placed in a muffle furnace, and heat-treated in an air atmosphere at 800° C. to 1000° C. for 10 ...

Embodiment 3

[0062] This example provides a method for preparing a sodium-rich P2 phase layered oxide material, specifically a spray drying method, such as image 3 shown, including:

[0063] Step 301, disperse the required stoichiometric sodium carbonate of 102wt% to 105wt% sodium carbonate and the required stoichiometric manganese dioxide, nickel oxide and M oxide in ethanol or water, and stir evenly to form a slurry;

[0064]Specifically, the M is specifically Mg 2+ , Zn 2+ , Cu 2+ , Mn 2+ ,Co 2+ , Al 3+ , Mn 3+ , Fe 3+ ,Co 3+ , V 3+ , Cr 3+ , Ti 4+ , Zr 4+ , Si 4+ , Sn 4+ , Ru 4+ , Nb 4+ , Mo 4+ one or more of.

[0065] Step 302, spray drying the slurry to obtain a precursor mixture;

[0066] In step 303, the precursor mixture is placed in a muffle furnace, and heat-treated in an air atmosphere at 700° C. to 1000° C. for 10 to 24 hours to obtain the layered oxide material.

[0067] The preparation method of the layered oxide material provided in this embodiment can ...

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
Discharge specific capacityaaaaaaaaaa
Discharge capacityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a sodium-rich P2-phase layered oxide material and a preparation method and an application thereof. The material has a chemical general formula of Na<0.72+delta>NiMnM<c>O<2+sigma>, wherein Ni, M, and Mn together with the six nearest oxygen atoms form an octahedral structure and a transition metal layer through edge-shared arrangement; six oxygen atoms in two transition metal layers form a triangular prism-shaped structure; an alkali metal ion of Na+ is located between every two transition metal layers and occupies one position of the triangular prism; M is specifically on or more selected from Mg2+, Zn2+, Mn2+, Co2+, Al3+, Mn3+, Fe3+, Co3+, V3+, Cr3+, Ti4+, Zr4+, Si4+, Sn4+, Ru4+, Nb4+, and Mo4+; and delta, a, b, c, and sigma satisfy relationships of (0.72+delta)+2a+4b+mc=2(2+sigma) and a+b+c=1.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a sodium-rich P2 phase layered oxide material and its preparation method and application. Background technique [0002] At present, global environmental problems are becoming more and more serious, threatening the life and livelihood of the earth and human beings. The root cause lies in the generation and consumption of energy. Non-renewable energy sources such as coal, oil, and natural gas are consumed in large quantities; automobiles, heating, etc. continue to emit waste gas into the atmosphere, polluting the environment. Therefore, the development of renewable energy is extremely important. Renewable clean energy such as solar energy and wind energy have been widely used, but if this electric energy is directly input into the grid, it will bring a great impact to the grid. Therefore, energy conversion and storage have become the key issues. The ensuing question is how to...

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): H01M4/525H01M4/505H01M4/485H01M10/054
CPCH01M4/131H01M4/1391H01M4/505H01M4/525H01M10/054H01M2004/028H01M2220/10Y02E60/10
Inventor 胡勇胜徐淑银李云明陈立泉黄学杰
Owner BEIJING HINA BATTERY TECH 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