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Electrochemical device and electronic equipment containing it

An electrochemical and positive electrode material technology, applied in the field of energy storage, can solve problems such as poor structural stability and electrochemical stability, aggravated electrolyte side reactions, and affecting material applications, so as to improve cycle performance, alleviate side reactions, and reduce interfaces. The effect of side effects

Active Publication Date: 2022-06-24
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous pursuit of energy density, the working voltage of lithium cobalt oxide continues to increase, and some shortcomings of traditional lithium cobalt oxide materials continue to appear. For example, when the traditional lithium cobalt oxide cathode material works under high voltage conditions, its The structural stability and electrochemical stability are poor, the cycle performance under high voltage becomes poor, the impedance continues to increase, and the side reaction with the electrolyte continues to intensify, which affects the application of the material

Method used

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  • Electrochemical device and electronic equipment containing it
  • Electrochemical device and electronic equipment containing it
  • Electrochemical device and electronic equipment containing it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Example 1: Using the solid-phase method, the active material lithium cobaltate was added to the ball milling jar, and then Li source and Co source were respectively added, and ball milled for 6 h to obtain a basic material; then the obtained basic material was placed in an inert atmosphere at 600 ℃. Sintering is carried out under the condition of ℃, and the obtained powder is ground to obtain the required positive electrode material. In the obtained positive electrode material, the composition of the coating is Li 6 CoO 4 , the average particle size is 500nm, and the coating amount is 0.2%.

Embodiment 2

[0105] Example 2: The difference from Example 1 is that the coating amount is 1.0%.

Embodiment 3

[0106] Example 3: The difference from Example 1 is that the coating amount is 1.5%.

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Abstract

The present application relates to the technical field of energy storage, and in particular to an electrochemical device and electronic equipment containing it. The electrochemical device includes a positive electrode material, and the positive electrode material includes: an active material; and a first material located on the surface of the active material; wherein, the first material includes a second material with a lattice spacing of Å. The electrochemical device using the above positive electrode material can exhibit excellent cycle stability under high voltage, and can also improve the charge capacity and energy density.

Description

technical field [0001] The present application relates to the technical field of energy storage, and in particular, to an electrochemical device and an electronic device including the same. Background technique [0002] With the popularization of consumer electronic products such as mobile phones, notebook computers, tablet computers, wearable devices, power banks, drones, etc., the requirements for electrochemical devices (eg, lithium-ion batteries) in them are becoming more and more stringent. For example, people not only require batteries to be light, but also require batteries with high energy density and good cycle stability at high voltages. [0003] As an important part of lithium-ion batteries, cathode materials have a significant impact on their performance, so it is particularly important to continuously optimize and improve cathode materials. Lithium cobalt oxide cathode material is the earliest commercial cathode material for lithium ion batteries, and has been ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 陈鹏伟
Owner NINGDE AMPEREX TECH
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