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Electrochemical mass spectrum in-situ battery device

A battery device and electrochemical technology, applied in the field of electrochemical analysis, can solve the problems of toxic mixtures of lipids, reduce instrument accuracy, instrument or system damage, etc. Effect

Inactive Publication Date: 2021-07-20
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And improper use of cold traps will reduce the accuracy of the instrument, cause damage to the instrument or system, and cause a physical accident
For example, many fat mixtures used in cold traps are toxic and can explode if not handled properly

Method used

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  • Electrochemical mass spectrum in-situ battery device
  • Electrochemical mass spectrum in-situ battery device
  • Electrochemical mass spectrum in-situ battery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Such as figure 1 with 2 As shown, an electrochemical mass spectrometer in-situ battery device includes an upper casing 1 , a sand core glass plate 2 , a separation membrane 3 , a fixed plate 4 with a plurality of air-permeable holes, and a lower casing 8 .

[0065] The top of the upper housing 1 is provided with an air outlet 10, and the side wall is embedded with a positive electrode lead terminal; the upper housing 1 is provided with an installation groove 11, and the sand core glass plate 2 is arranged in the installation groove 11 and the air outlet 10 is sealed. The separation membrane 3 is pasted on the bottom of the sand core glass plate 2 .

[0066] The stainless steel plate 4 is fixedly connected to the upper casing 1 through six insulating rubber-wrapped bolts evenly arranged in its axial direction, and the separation membrane 3 and the sand core glass plate 2 are fixed in the upper casing 1 . The separation membrane 3 and the stainless steel plate 4 are sea...

Embodiment 2

[0077] First of all, it should be noted that when using mass spectrometry for detection, any trace impurities (such as water, a small amount of air, etc.) may participate in electrochemical reactions, thereby affecting the accuracy of test results. Therefore, the electrolyte salts and solvents used in the operation need to be purified and dried before use to ensure that the degree of contamination is minimized.

[0078] The electrolyte is made of purified DMC and LiPF 6 Composition: Lithium sheet is used as the negative electrode, nickel-cobalt-lithium-aluminate ternary material is used as the positive electrode;

[0079] The assembly of the battery is completed in a glove box filled with argon gas. The specific assembly process of the battery chamber is as follows: the lithium sheet (negative electrode material), electrolyte (DMC and LiPF 6 Composition) Wetted diaphragm, nickel-cobalt-lithium-aluminate ternary material (positive electrode material), stainless steel mesh, and...

Embodiment 3

[0087] Compared with Example 2, other conditions remain the same, only the electrolyte system is replaced, for DEC+LiPF 6 The blocking effect test of the electrolyte system: the results show that the existence of the separation membrane can block 99.99% of DEC from entering the mass spectrometer, effectively avoiding the dilemma of the volatile electrolyte drying up under argon purging.

[0088] It shows that the electrochemical mass spectrometry in situ battery device of this example can be applied to different electrolyte systems and has wide practical value.

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Abstract

The invention provides an electrochemical mass spectrometry in-situ battery device, which comprises a lower shell, wherein the lower shell is internally provided with an accommodating groove for mounting an experimental battery and an air inlet is arranged in the side wall; a separation membrane used for blocking volatile electrolyte steam and connected with the opening of the accommodating groove in a sealing manner; and an upper shell used for installing the separation membrane, wherein an air outlet is formed in the upper shell, and the separation membrane is in sealed connection with the air outlet. Carrier gas entering from the air inlet passes through the experimental battery and the separation membrane, and then flows out from the air outlet together with target gas separated by the separation membrane. According to the electrochemical mass spectrum in-situ battery device disclosed by the invention, effective separation of the gaseous electrolyte from the carrier gas and the target gas is realized, and the accuracy of an analysis result is improved; meanwhile, the mass spectrum response time is shortened, and the working efficiency is improved. The structure is simple, operation is convenient, the application range is wide, and practicability is high.

Description

technical field [0001] The invention belongs to the technical field of electrochemical analysis, and in particular relates to an electrochemical mass spectrometer in-situ battery device. Background technique [0002] As global environmental issues and energy crises become increasingly prominent, people are focusing on the development of clean and renewable energy. Lithium-ion battery, as an electrochemical energy storage system, has become the most ideal and technological level in the world due to its high working voltage, high energy density, high efficiency and cleanliness, long cycle life and other advantages since its development in the 20th century. It is the highest rechargeable chemical battery, but its bulging risk caused by gas production during the charge-discharge cycle has always limited its wide application. Therefore, it is imminent to explore at what potential the lithium-ion battery has problems to avoid the bulging phenomenon. [0003] Electrochemical diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/403G01N27/62
CPCG01N27/403G01N27/62
Inventor 陈宇辉余婷欧豪宇
Owner NANJING UNIV OF TECH
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