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Electrochemical device and electronic equipment

An electrochemical and electrolyte technology, applied in the field of energy storage, can solve the problems of hindering the rapid insertion or extraction of lithium ions, small interlayer spacing, etc., and achieve the effect of improving rate performance and increasing lithium intercalation capacity.

Active Publication Date: 2021-07-09
NINGDE AMPEREX TECH
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Problems solved by technology

The existing technology mainly adopts to increase the graphitization temperature of the negative electrode active material to maximize the specific capacity of the negative electrode active material, but due to the high graphitization temperature, the layer spacing will be smaller, which seriously hinders the rapid intercalation or extraction of lithium ions.

Method used

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  • Electrochemical device and electronic equipment
  • Electrochemical device and electronic equipment
  • Electrochemical device and electronic equipment

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Embodiment Construction

[0029] Embodiments of the present application will be described in detail below. The examples of the present application should not be construed as limiting the present application.

[0030] Unless otherwise expressly indicated, the following terms used herein have the meanings indicated below.

[0031] In the detailed description and claims, a list of items linked by the terms "at least one of", "at least one of", "at least one of" or other similar terms may mean that the listed items any combination of . For example, if the items A, B are listed, the phrase "at least one of A, B" means A only; only B; or A and B. In another example, if the items A, B, C are listed, the phrase "at least one of A, B, C" means only A; or only B; only C; A and B (excluding C); A and C (excluding B); B and C (excluding A); or all of A, B, and C. Item A may contain a single element or multiple elements. Item B may contain a single element or multiple elements. Item C may contain a single ele...

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Abstract

The invention relates to the technical field of secondary batteries, in particular to an electrochemical device and electronic equipment. The electrochemical device comprises a positive electrode, a negative electrode and an electrolyte, wherein the positive electrode comprises a positive current collector and a positive active material layer arranged on the positive current collector, and the positive active material layer comprises a positive active material; the negative electrode comprises a negative current collector and a negative active material layer arranged on the negative current collector, and the negative active material layer comprises a negative active material; and when the electrochemical device is in a fully charged state, the terminal potential of the negative active material is AV, the excess coefficient of the electrochemical device is B, and a ratio of B / A is in a range of 13.2 to 26.3. According to the electrochemical device and the electronic equipment provided by the invention, the rate capability of a battery can be improved without influencing the energy density of the battery.

Description

technical field [0001] The present application relates to the technical field of energy storage, in particular, to electrochemical devices and electronic equipment. Background technique [0002] With the continuous development of the mobile phone market, the requirements for lithium-ion batteries suitable for the mobile phone market are also getting higher and higher. The fundamental solution to the battery life problem is to increase the energy density of lithium ions, so that mobile phones can store more batteries in a limited volume. energy of. The existing technology mainly uses increasing the graphitization temperature of the negative electrode active material to maximize the specific capacity of the negative electrode active material, but due to the high graphitization temperature, the layer spacing will be smaller, which seriously hinders the rapid intercalation or extraction of lithium ions. . This requires a balance between energy density and fast charging perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/139H01M10/0525
CPCH01M4/13H01M10/0525H01M4/139Y02E60/10
Inventor 冯鹏洋
Owner NINGDE AMPEREX TECH
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