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Electrochemical device and electronic device comprising the same

An electrochemical and electronic technology, applied in the field of electronic devices and electrochemical devices, can solve the problems of increasing active lithium consumption, not being universal, and losing battery life

Active Publication Date: 2022-06-03
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material design scheme in the prior art can only be specially optimized for certain materials, and it is not universal. The chemical system scheme will increase the active lithium consumption in the system and make up for the kinetic performance by losing the service life of the battery.

Method used

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  • Electrochemical device and electronic device comprising the same
  • Electrochemical device and electronic device comprising the same
  • Electrochemical device and electronic device comprising the same

Examples

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preparation example Construction

[0060] The positive electrode can be prepared by a preparation method known in the art. For example, the positive electrode can be obtained by mixing an active material, a conductive material, and a binder in a solvent to prepare an active material composition, and coating the active material composition on a current collector. According to some embodiments of the present application, the solvent may include, but is not limited to: N-methylpyrrolidone.

[0061] Materials, compositions, and methods of making the negative electrodes that can be used in embodiments of the present application include any of those disclosed in the prior art. According to some embodiments of the present application, the negative electrode includes a current collector and a negative electrode active material layer formed on the current collector, the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material may include a materia...

Embodiment 1

(1) First, PVDF is added to the nitrogen methyl pyrrolidone solvent to obtain solution 1 with a mass content of 10% PVDF;

(2) 25g ethyl viologen perchlorate is added in the solution 1 of 1L, obtains the solution 2 of 4 mmol / L viologen;

(3) The active material cathode material nickel cobalt lithium manganate, the conductive agent acetylene black, and the binder polyvinylidene fluoride (PVDF) are fully stirred and mixed in the N-methylpyrrolidone solvent system in a weight ratio of 95:3:2 Uniform, wherein PVDF is added in a corresponding proportion of solution 2 according to the weight ratio, and the slurry is coated on Al foil, dried and cold-pressed to obtain a positive pole piece. The SEM image of the positive electrode plate prepared in Example 1 is as follows: figure 1 shown.

[0079] (4) Preparation of lithium-ion battery

The negative electrode active material graphite, conductive agent acetylene black, binder styrene-butadiene rubber (SBR), thickener carbon me...

Embodiment 2

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Abstract

The invention relates to an electrochemical device and an electronic device. The electrochemical device comprises an electron relay, the electron relay can be added to at least one of a positive electrode, a negative electrode, an isolating membrane or an electrolyte, the electron relay comprises at least one of viologen compounds or tetrathiafulvalene compounds, and the mass percentage content of the electron relay in the electrochemical device is 0.05%-5%. The electrochemical device provided by the invention has good dynamic performance.

Description

technical field [0001] The present application belongs to the field of battery technology, and in particular relates to an electrochemical device and an electronic device including the electrochemical device. Background technique [0003] With the continuous development of lithium batteries, more and more mobile phones, notebooks, drones and other electronic products are pursuing higher and higher user experience. higher energy density. However, in order to achieve the energy density of the product, it is necessary to use designs such as higher coating weight, which makes it difficult to break through the dynamic performance, and even is limited by the design, and the dynamic performance is even worse. [0004] In the prior art, from the aspect of materials, on the one hand, the graphite kinetic performance can be improved by coating the graphite or increasing the OI value, and on the other hand, the material can be modified to improve the discharge kinetic performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0567H01M10/42H01M50/411H01M10/0525
CPCH01M10/4235H01M10/0525H01M10/0567H01M50/411H01M4/628H01M4/625Y02E60/10
Inventor 蒋欣王慧鑫汪颖
Owner NINGDE AMPEREX TECH
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