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Electrolyte and electrochemical device using electrolyte

A technology of electrolyte and compound, which is applied in the field of electrolyte, can solve the problems of increased safety impedance of lithium-ion batteries, and achieve the effect of improving floating charge performance and stability

Active Publication Date: 2019-05-21
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

How to solve the safety of lithium-ion batteries and the increase in impedance after use is a difficult problem for everyone

Method used

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  • Electrolyte and electrochemical device using electrolyte
  • Electrolyte and electrochemical device using electrolyte
  • Electrolyte and electrochemical device using electrolyte

Examples

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preparation example Construction

[0139] The negative electrode can be prepared by a preparation method known in the art. For example, the negative electrode may 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. In some embodiments, the solvent may include water, etc., but is not limited thereto.

[0140] 3. Positive electrode

[0141] The material of the positive electrode used in the electrochemical device of the present application can be prepared using materials, configurations, and manufacturing methods known in the art. In some embodiments, the positive electrode of the present application can be prepared using the technique described in US9812739B, which is incorporated in this application by reference in its entirety.

[0142] In some embodiments, the positive electrode includes a current collector and a positive active material layer on the current c...

Embodiment

[0164] Hereinafter, although an Example and a comparative example are given and this application is demonstrated more concretely, unless it deviates from the summary, this application is not limited to these Examples.

[0165] 1. Preparation of Li-ion battery

[0166] 1) Preparation of electrolyte: In an argon atmosphere glove box with a water content 6 Dissolved in the above solvent to obtain the basic electrolyte, wherein LiPF in the basic electrolyte 6 The concentration is about 1mol / L. The electrolytes of different examples and comparative examples were obtained by adding substances with different contents shown in the following tables into the basic electrolyte. The content of each substance in the electrolyte described below is calculated based on the total weight of the electrolyte.

[0167] 2) Preparation of the positive electrode sheet: the positive electrode active material lithium cobaltate (LiCoO 2 ), the conductive agent acetylene black, and the binder polyviny...

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Abstract

The application relates to electrolyte and an electrochemical device using the electrolyte. The electrolyte includes a compound containing the -CN functional group and a compound containing the P-O key. By simultaneously introducing the compound containing the -CN functional group and the compound containing the P-O key into the electrolyte, the active material is better protected; and thus, the floating charge performance and the nailing performance of the battery are effectively improved and the loop impedance is increased.

Description

technical field [0001] The present application relates to the technical field of electrochemical devices, and more specifically relates to an electrolyte solution and an electrochemical device using the same. Background technique [0002] With the popularity and application of smart electronic products such as mobile phones, notebooks, and cameras, the safety of such products in harsh environments has gradually become the focus of attention. As the working power source of electronic products, lithium-ion batteries have replaced traditional Ni-Cd and MH-Ni batteries and are widely used in such products. However, with the development of thinner and portable electronic products, people's requirements for lithium-ion batteries continue to increase. The development of relatively safe lithium-ion products that can withstand high temperatures and various deteriorating conditions has become a top priority. Especially in the market, the battery bulges frequently and automatically s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M10/0567Y02E60/10H01M10/0525H01M2300/0042H01M10/4235H01M10/0569
Inventor 栗文强张水蓉徐春瑞马娟
Owner NINGDE AMPEREX TECH
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