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Method for measuring oxidation potential of electrolyte

A technology of oxidation potential and measurement method, applied in non-aqueous electrolytes, solid electrolytes, measuring electricity, etc., can solve the problems of long oxidation potential time, low accuracy, poor conductivity of polymers, etc., and achieve short and accurate measurement time. high rate effect

Pending Publication Date: 2022-07-26
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polymers do not conduct electricity well and are generally poor conductors of electricity
When the polymer is used as an electrolyte, it takes a long time to test the oxidation potential of the polymer with the existing measurement method, and the accuracy is low

Method used

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  • Method for measuring oxidation potential of electrolyte
  • Method for measuring oxidation potential of electrolyte
  • Method for measuring oxidation potential of electrolyte

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Embodiment Construction

[0049] The method for measuring the oxidation potential of the electrolyte provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0050] The first embodiment of the present invention provides a glycerol ether epoxy resin, the glycerol ether epoxy resin contains ether oxide groups, and the glycerol ether epoxy resin is ring-opened by a glycerol ether polymer and a polyamine compound The crosslinked polymer obtained by the reaction. The glycerol ether epoxy resin is a cross-linked three-dimensional network structure. The glycerol ether polymer is a glycidyl ether polymer, and the glycidyl ether polymer includes at least two epoxy groups; the polyamine compound includes at least two amine groups. The cross-linked polymer includes a main chain and a plurality of hydroxyl groups, the plurality of hydroxyl groups in the cross-linked polymer are located on the main chain of the cross-linked polymer, and the plurality of hyd...

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Abstract

The invention provides a method for measuring the oxidation potential of an electrolyte. The method comprises the following steps: S1, arranging the electrolyte between a working electrode and an auxiliary electrode to assemble an electrolytic tank; s2, applying a first voltage U1 between the working electrode and the auxiliary electrode for the application time delta t; s3, after delta t is continuously applied to U1, a second voltage U2 = U1 + delta U is applied between the working electrode and the auxiliary electrode, and the application time delta t is continued; s4, applying a third voltage U3 between the working electrode and the auxiliary electrode, wherein the third voltage U3 is equal to U2 + delta U, and the applying time is delta t; in the same way, voltage Un = U (n-1) + deltaU is applied between the working electrode and the auxiliary electrode, the application time is deltat, n is an integer larger than or equal to 4, and a changing curve of the current and the potential of the electrolytic tank along with time is obtained; and S5, obtaining the oxidation potential of the electrolyte according to the change curve of the current and the potential of the electrolytic tank along with time.

Description

technical field [0001] The invention relates to a method for measuring the oxidation potential of an electrolyte, in particular to a method for measuring the oxidation potential of a lithium ion battery electrolyte. Background technique [0002] With the gradual development of information terminals from mainframes to wearable devices, the demand for flexible electronic devices is also increasing. As the key to flexible electronic devices, flexible energy storage devices are used as energy supply components with broad application prospects, such as wearable electronic devices and implantable medical devices, and such applications are increasing. Compared with other energy storage devices, lithium-ion batteries (LIBs) have higher operating voltages and greater energy density, and lithium-ion batteries are considered ideal for flexible energy storage devices. [0003] Polymers are ideal for flexible lithium-ion battery electrolytes due to their excellent flexibility, processab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/416G01N21/3577C08G59/50
CPCG01N27/4166G01N21/3577C08G59/5006G01N2021/3595H01M10/0525H01M10/0565H01M2300/0082G01R31/385Y02E60/10H01M10/484
Inventor 方振翰王佳平范守善
Owner TSINGHUA UNIV
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