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Integrated electrode and preparation method and application thereof

A technology of electrodes and electrolytes, which is applied in the field of integrated electrodes and its preparation, can solve the problems of poor battery performance, poor electrolyte density, electrolyte and electrode interface impedance, etc., and achieve high density, improved magnification and cycle performance, and high energy density. Effect

Pending Publication Date: 2022-07-05
广东马车动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an integrated electrode and its preparation method and application, aiming to solve the problem of poor density of the electrolyte and the large interface impedance between the electrolyte and the electrode in the existing solid-state battery. , resulting in poor battery performance

Method used

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  • Integrated electrode and preparation method and application thereof
  • Integrated electrode and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Step 1: Composite cathode configuration: the Ni 0.8 Co 0.1 Mn 0.1 (OH) 2 : LiOH (molar ratio 1:1), metal conductive agent accounted for 5%, mixed evenly and pressed into a sheet;

[0040] Step 2: Electrolyte (LATP) configuration: the NH 4 H 2 PO 4 :Al 2 O 3 :TiO 2 : LiOH (molar ratio 3:0.3:1.7:1.3) mixed evenly and pressed into tablets;

[0041] Step 3: Negative Configuration: Li 4 Ti 5 O 12 , The proportion of metal conductive agent is 5%, mixed evenly and pressed into pieces;

[0042] Step 4: Stack the sheet-like samples in the order of the composite positive electrode / electrolyte / negative electrode mixed pole pieces, and compact them by cold isostatic pressing;

[0043] Step 5: Place the samples pressurized in step 4 into a dry pot and then sintered in a quartz tube at 800°C under the addition of an oxygen atmosphere to obtain a highly dense chemical electrode-electrolyte integrated electrode;

[0044] Step 6: The electrode-electrolyte integrated electr...

Embodiment 2

[0046] Step 1: Composite cathode configuration: the Ni 0.8 Co 0.1 Mn 0.1 (OH) 2 : LiOH (molar ratio 1:1), metal conductive agent metal conductive ratio of 5%, mixed evenly and pressed into a sheet;

[0047] Step 2: Electrolyte (LLZO) configuration: La 2 O 3 : ZrO 2 : LiOH (molar ratio 1.5:2:7) is mixed evenly and pressed into tablets;

[0048] Step 3: Negative Configuration: Li 4 Ti 5 O 12 , The proportion of metal conductive agent is 5%, mixed evenly and pressed into pieces;

[0049] Step 4: Stack the sheet-like samples in the order of the composite positive electrode / electrolyte / negative electrode mixed pole pieces, and compact them by cold isostatic pressing;

[0050] Step 5: Place the samples pressurized in step 4 into a dry pot and then sintered in a quartz tube at 800°C under the addition of an oxygen atmosphere to obtain a highly dense chemical electrode-electrolyte integrated electrode;

[0051] Step 6: The electrode-electrolyte integrated electrode obtained...

Embodiment 3

[0053] Step 1: Composite cathode configuration: the Ni 0.8 Co 0.1 Mn 0.1 (OH) 2 : LiOH (molar ratio 1:1), metal conductive agent accounted for 5%, mixed evenly and pressed into a sheet;

[0054] Step 2: Step 2: Electrolyte (LATP) configuration: NH 4 H 2 PO 4 :Al 2 O 3 :TiO 2 : LiOH (molar ratio 3:0.3:1.7:1.3) mixed evenly and pressed into tablets;

[0055] Step 3: Negative configuration: SiO x , The proportion of metal conductive agent is 5%, mixed evenly and pressed into pieces;

[0056] Step 4: Stack the sheet-like samples in the order of the composite positive electrode / electrolyte / negative electrode mixed pole pieces, and compact them by cold isostatic pressing;

[0057] Step 5: Place the samples pressurized in step 4 into a dry pot and then sintered in a quartz tube at 800°C under the addition of an oxygen atmosphere to obtain a highly dense chemical electrode-electrolyte integrated electrode;

[0058] Step 6: The electrode-electrolyte integrated electrode obt...

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Abstract

The invention discloses an integrated electrode and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing a positive electrode active material, LiOH and a metal conductive agent, and pressurizing to form a sheet to obtain a positive plate; uniformly mixing one or more of the oxide solid electrolyte with LiOH, and pressurizing to form a sheet, so as to obtain an electrolyte sheet; uniformly mixing a negative active material with a metal conductive agent, and pressurizing a finished product to obtain a negative plate; sequentially superposing the positive plate, the electrolyte plate and the negative plate, and carrying out cold isostatic pressing treatment to obtain a mixed lamination; and sintering the mixed lamination in an oxygen atmosphere to obtain the integrated electrode. According to the prepared integrated electrode, the interface problem existing in a traditional oxide battery material is greatly solved, the influence of glue in the electrode on battery impedance is greatly eliminated, and the integrated electrode is high in compactness and higher in energy density; when the integrated electrode is used for preparing the solid battery, the rate and the cycle performance of the battery can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of battery electrodes, in particular to an integrated electrode and a preparation method and application thereof. Background technique [0002] With the energy revolution, global communications have picked up pace. At present, lithium batteries have shown a wide range of application prospects in electric vehicles, hybrid vehicles and smart grids. However, traditional liquid lithium batteries have low energy density and contain a large amount of flammable and explosive organic electrolytes, which make batteries face great challenges in terms of safety performance. As a new generation of lithium batteries, solid-state batteries have greatly improved the safety performance of batteries, while reducing the use of separators and greatly improving the energy density of batteries. [0003] At present, there are three main directions of solid electrolytes with promising application: inorganic sulfide solid electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525H01M10/058
CPCH01M10/0562H01M10/058H01M10/0525H01M2300/0071Y02P70/50
Inventor 苏威同成小康田冰冰李真棠
Owner 广东马车动力科技有限公司
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