Lithium battery anode and preparation method, lithium battery and preparation method and application

A lithium battery and positive electrode technology, applied in the lithium battery positive electrode and its preparation, lithium battery and its preparation field, can solve problems such as instability, battery safety hazards, inability to transfer lithium ions, etc., to achieve simple process, easy control of conditions, high efficiency effect

Active Publication Date: 2014-05-14
TONGDING INTERCONNECTION INFORMATION CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the method of adding high-voltage additives has the following defects: the preferential oxidation of high-voltage additives will reduce the coulombic efficiency of the battery for several times at the beginning, and increase the irreversible capacity of the battery; Composition, the unstable characteristics of this organic compound at high temperature will not only cause the electrolyte to lose its ability to work at high voltage in a high temperature environment, but also bring hidden dangers to the safety of the battery
[0008] However, the electrode modification method still has the following technical defects: the selected material of the treatment layer is such as the hydrogen oxidation of Mg, Al, Co, K, Na, Ca, Si, Ti, Sn, V, Ge, Ga, B, As and Zr. Compounds, oxyhydroxides, oxycarbonates, hydroxycarbonates, and their mixtures cannot transport lithium ions
Therefore, covering the surface of the active material with the above substances will affect the intercalation and deintercalation capabilities of lithium ions and reduce the electrochemical performance of lithium batteries.
[0009] To sum up, no matter which existing method is used to increase the working voltage of the electrolyte to avoid oxidation of the electrolyte, it will have an adverse effect on the electrochemical performance of the battery or further on the safety performance of the battery, and it is impossible to effectively improve the electrolytic solution. Ensure or further improve the electrochemical performance and safety of the battery while maintaining the liquid working voltage

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
  • Lithium battery anode and preparation method, lithium battery and preparation method and application
  • Lithium battery anode and preparation method, lithium battery and preparation method and application
  • Lithium battery anode and preparation method, lithium battery and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] Correspondingly, the embodiment of the present invention also provides a method for preparing the positive electrode of the above-mentioned lithium battery. For the process flow of the method for preparing the positive electrode of the lithium battery, please refer to image 3 , see also figure 1 , 2 . The lithium battery positive electrode comprises the following steps:

[0057] Step S01. Prepare a slurry containing a material that is electrically insulated but conducts to lithium ions: mix the material that is electrically insulated but conducts to lithium ions with a solvent to prepare a slurry;

[0058] Step S02: Cover the positive electrode with the slurry: cover the positive electrode containing the positive electrode material layer 2 with the slurry prepared in step S01, and form the protective layer 3 after drying to obtain the positive electrode of the lithium battery.

[0059] Specifically, in the above step S01 , the materials that are electrically insulat...

Embodiment 1

[0081] A lithium battery positive electrode and a preparation method thereof, and a lithium ion battery:

[0082] The microstructure of the positive electrode of the lithium battery is as follows figure 2 As shown, the positive electrode of the lithium battery includes a current collector 1 , a positive electrode material layer 2 bonded to the surface of the current collector 1 , and a protective layer 3 bonded to the surface of the positive electrode material layer 2 and the pore walls of the positive electrode material layer 2 . Among them, the protective layer 3 contains lithium carbonate.

[0083] The positive electrode of the lithium battery is prepared as follows:

[0084] Preparation of the positive electrode: LiNi with a mass ratio of 80:10:10 0.5 mn 1.5 o 4 , conductive carbon, binder (polyvinylidene fluoride) and a certain amount of N-methylpyrrolidone solvent are uniformly mixed (the solid content of the final mixed solution is 45%) to obtain the positive elect...

Embodiment 2

[0092] A lithium battery positive electrode and a preparation method thereof, and a lithium ion battery:

[0093] The structure of the positive electrode of the lithium battery is the same as that of the positive electrode of the lithium battery in Example 1, except that the protective layer contains lithium carbonate, and the concentration of the precursor solution of the protective layer is 10%.

[0094] The positive electrode of the lithium battery is prepared as follows:

[0095] Preparation of the positive electrode: refer to the preparation of the positive electrode in Example 1;

[0096] Prepare a slurry containing materials that are electrically insulated and conductive to lithium ions: lithium hydroxide is dissolved in water, and an aqueous solution with a concentration of 10% by mass is prepared;

[0097] Positive electrode modification: The prepared positive electrode was immersed in a 10% lithium hydroxide aqueous solution, and the positive electrode sheet taken o...

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
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a lithium battery anode and a preparation method, a lithium battery and a preparation method and an application. The lithium battery anode comprises a current collector, a cathode material layer combined on the surface of the current collector, and a protection layer combined on the cathode material layer surface and a cathode material layer aperture wall. The lithium battery anode can inhibit the generation of betatopic oxidation reaction of an electrolyte solvent when the high voltage is used, and the antioxidation capability of the electrolyte is increased. The lithium battery contains the lithium battery anode, and its electrochemistry performance is excellent. The preparation method of the lithium battery anode and the lithium battery has the advantages of simple technology, easy condition control and high efficiency, and is adapted to industrial production.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a positive electrode of a lithium battery and a preparation method thereof, a lithium battery and a preparation method and application thereof. Background technique [0002] Compared with other batteries, lithium batteries have the advantages of light weight, small size, high working voltage, high energy density, high output power, high charging efficiency, no memory effect, and long cycle life. They have been widely used in mobile phones, notebook computers and other fields. Wide range of applications. However, at present, electronic digital products such as smart phones and tablet computers have higher and higher requirements on the energy density of batteries, making it difficult for commercial lithium batteries to meet the requirements. The use of high-capacity cathode materials or high-voltage cathode materials is an effective way to increase the energy densit...

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): H01M4/62H01M4/13H01M4/139H01M10/0525H01M10/058
CPCH01M4/13H01M4/139H01M4/62H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 杨同勇
Owner TONGDING INTERCONNECTION INFORMATION 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