CN111896597A - Three-electrode system detection device for detecting electrochemical performance of button cell - Google Patents
Three-electrode system detection device for detecting electrochemical performance of button cell Download PDFInfo
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- CN111896597A CN111896597A CN202010641532.9A CN202010641532A CN111896597A CN 111896597 A CN111896597 A CN 111896597A CN 202010641532 A CN202010641532 A CN 202010641532A CN 111896597 A CN111896597 A CN 111896597A
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- electrode
- button cell
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- reference electrode
- stainless steel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/301—Reference electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a three-electrode system detection device for detecting the electrochemical performance of a button cell. The device is obtained by adding a stainless steel shell containing a reference electrode on the basis of a stainless steel shell of a conventional button cell. The structure is characterized in that the button cell comprises a negative electrode shell of the button cell, a steel shell containing a reference electrode and a positive electrode shell from top to bottom. The button cell adopting the device can adopt a three-electrode detection method to detect the cell performance, can obtain more precise data compared with the traditional two-electrode detection system, is beneficial to the quantitative research of the electrochemical behaviors of the anode and the cathode of the cell by researchers, and can greatly improve the electrochemical detection efficiency of the button cell.
Description
Technical Field
The invention relates to the field of lithium ion batteries, in particular to a three-electrode system detection device for detecting electrochemical performance of a button cell.
Background
The button cell has the characteristics of small volume, simple installation steps and the like, so that the button cell is widely applied to performance detection or research work of battery electrode materials. Button cells are generally composed of a positive electrode shell and a negative electrode shell with a sealing ring, and the shell is made of stainless steel, and meanwhile, the requirement on the sealing performance of the cell is high, so that a third electrode is difficult to insert in the cell shell. Therefore, the button cell generally employs a two-electrode system for electrochemical performance detection, i.e., one of the positive and negative electrodes serves as a working electrode, and the other electrode serves as a counter electrode and a reference electrode. Because the two-electrode system only has the working electrode and the counter electrode, only potential difference data between the two electrodes can be obtained in the test process, and the three-electrode system is added with the reference electrode, so that the potential of the working electrode can be further controlled and tested. Researches find that in the electrochemical detection process of the lithium ion battery, the data obtained by the three-electrode detection system is obviously more comprehensive and accurate than the data obtained by the two-electrode measurement system. Therefore, in order to obtain scientific and reliable detection data, the button cell battery is required to be subjected to three-electrode system detection.
Disclosure of Invention
Aiming at the defects that the special structure of the button cell only adopts a two-electrode system to monitor electrochemical data, the obtained data is incomplete and the reliability is insufficient, the invention aims to: a three-electrode system detection device for detecting the electrochemical performance of a button cell is provided.
The purpose of the invention is realized by the following scheme: a three-electrode system detection device for detecting electrochemical performance of a button cell comprises a conventional button cell stainless steel shell structure, wherein a stainless steel shell containing a reference electrode is additionally arranged on the basis of the conventional button cell stainless steel shell, the structure of the device is respectively a negative electrode shell, a steel shell containing the reference electrode and a positive electrode shell of the button cell from top to bottom, namely the steel shell containing the reference electrode is internally provided with the reference electrode, and the diameter of the reference electrode is 1-5 mm.
The device can effectively detect the three-electrode system of the button cell and obtain reliable and comprehensive detection data.
On the basis of the scheme, the thickness of the steel shell containing the reference electrode is 3-7 mm, the upper interface of the steel shell is consistent with the anode shell and used for sealing with the common stainless steel cathode shell, and the lower interface of the steel shell is consistent with the common stainless steel cathode shell and provided with a sealing ring and used for sealing with the anode shell.
Furthermore, the negative electrode shell and the positive electrode shell are positive and negative stainless steel shells of a conventional button cell.
The reference electrode is a gold wire, a platinum wire, a lithium wire or a copper wire plated with gold, platinum and lithium on the surface, the diameter of the reference electrode is 1-5 mm, and the reference electrode is used for electrochemical detection of a three-electrode system.
Preferably, the conventional button cell batteries are CR2016, CR2025 and CR 2032.
Preferably, the steel can containing the reference electrode has a thickness of 3 mm.
Preferably, the reference electrode is one of gold wire, platinum wire or lithium wire, and has a diameter of 1 mm.
The invention has the advantages that: the structure is characterized in that the upper part and the lower part of the button cell are respectively a negative electrode shell and a positive electrode shell of the button cell, only a steel shell containing a reference electrode is added in the middle, and the button cell can be effectively detected by a three-electrode system through the structural improvement, so that reliable and comprehensive detection data can be obtained.
Drawings
FIG. 1 is a schematic diagram of a three-electrode system detection device for detecting electrochemical performance of button cells;
the reference numbers in the figures illustrate:
1-negative electrode shell; 2-steel shell containing reference electrode;
3-positive electrode shell; 4-sealing ring;
5-reference electrode; 6-reference electrode lead.
Detailed Description
Example 1:
a three-electrode system detection device for detecting the electrochemical performance of a button cell comprises a stainless steel shell structure of a conventional button cell, wherein positive and negative steel shells of the conventional button cell with the model of CR2016 are respectively a positive shell 3 and a negative shell 1 of the detection device, a steel shell 2 with the thickness of 3mm and containing a reference electrode is added in the middle of the steel shell, the structure of the device is respectively the negative shell 1, the steel shell 2 and the positive shell 3 of the button cell from top to bottom, a sealing ring 4 is arranged between the shells, the steel shell 2 containing the reference electrode comprises the reference electrode, the reference electrode is a gold wire, and the diameter of the reference electrode is 1 mm. The device can carry out effective three-electrode system detection on the button cell and obtain reliable and comprehensive detection data.
Example 2:
a three-electrode system detection device for detecting the electrochemical performance of a button cell adopts a conventional button cell stainless steel shell structure with the model number of CR2016, the structure is the same as that of embodiment 1, positive and negative steel shells of the conventional button cell are respectively a positive shell and a negative shell of the detection device, a steel shell with the thickness of 5mm and containing a reference electrode is added in the middle of the steel shell, the structure of the device is respectively a negative shell, a steel shell with the reference electrode and a positive shell of the button cell from top to bottom, and the reference electrode of the embodiment is a gold wire with the diameter of 3 mm.
Example 3:
a three-electrode system detection device for detecting the electrochemical performance of a button cell adopts a positive electrode steel shell and a negative electrode steel shell of a conventional button cell with the model number CR2025 as a positive electrode shell and a negative electrode shell of a detection device respectively, the structure of the detection device is the same as that of embodiment 1, a steel shell which is 3mm thick and contains a reference electrode is added in the middle, the reference electrode is a lithium wire, and the diameter of the reference electrode is 1 mm.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (7)
1. The utility model provides a three electrode system detection device for button cell electrochemical performance detects, includes conventional button cell stainless steel shell structure, its characterized in that: on the basis of a conventional button cell stainless steel shell, a stainless steel shell containing a reference electrode is added, and the structure of the device is that a negative electrode shell, a steel shell containing the reference electrode and a positive electrode shell of the button cell are respectively arranged from top to bottom, namely the steel shell containing the reference electrode is internally provided with the reference electrode, and the diameter of the reference electrode is 1-5 mm. The device can carry out effective three-electrode system detection on the button cell and obtain reliable and comprehensive detection data.
2. The device for detecting the electrochemical performance of the button cell according to claim 1, wherein the thickness of the steel shell containing the reference electrode is 3-7 mm, the upper interface of the steel shell is consistent with the positive electrode shell and is used for sealing with the common stainless steel negative electrode shell, and the lower interface of the steel shell is consistent with the common stainless steel negative electrode shell and is provided with a sealing ring and is used for sealing with the positive electrode shell.
3. The device for detecting electrochemical properties of button cells according to claim 1 or 2, wherein the negative electrode housing and the positive electrode housing are stainless steel housings of conventional button cells.
4. The device as claimed in claim 1, wherein the reference electrode is gold wire, platinum wire, lithium wire or copper wire coated with gold, platinum, and lithium.
5. The detecting device for detecting the electrochemical performance of the button cell as claimed in claim 1, wherein the model of the conventional button cell is CR2016, CR2025 or CR 2032.
6. The device as claimed in claim 2, wherein the steel case containing the reference electrode has a thickness of 3 mm.
7. The device as claimed in claim 4, wherein the reference electrode is one of gold wire, platinum wire or lithium wire, and has a diameter of 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010641532.9A CN111896597A (en) | 2020-07-06 | 2020-07-06 | Three-electrode system detection device for detecting electrochemical performance of button cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010641532.9A CN111896597A (en) | 2020-07-06 | 2020-07-06 | Three-electrode system detection device for detecting electrochemical performance of button cell |
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| CN111896597A true CN111896597A (en) | 2020-11-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201289523Y (en) * | 2008-08-23 | 2009-08-12 | 上海比亚迪有限公司 | Tri-electrode system for analog buckle type lithium ion cell |
| CN202025833U (en) * | 2011-05-16 | 2011-11-02 | 苏州大学 | Three-electrode button cell |
| CN203607508U (en) * | 2013-11-30 | 2014-05-21 | 东莞市凯欣电池材料有限公司 | Three-electrode button cell |
| US20180108952A1 (en) * | 2016-10-17 | 2018-04-19 | GM Global Technology Operations LLC | Three-electrode test cell |
| CN111129432A (en) * | 2019-11-28 | 2020-05-08 | 浙江浙能技术研究院有限公司 | Novel reference electrode and three-electrode system for nondestructive testing of lithium ion battery industry and method |
-
2020
- 2020-07-06 CN CN202010641532.9A patent/CN111896597A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201289523Y (en) * | 2008-08-23 | 2009-08-12 | 上海比亚迪有限公司 | Tri-electrode system for analog buckle type lithium ion cell |
| CN202025833U (en) * | 2011-05-16 | 2011-11-02 | 苏州大学 | Three-electrode button cell |
| CN203607508U (en) * | 2013-11-30 | 2014-05-21 | 东莞市凯欣电池材料有限公司 | Three-electrode button cell |
| US20180108952A1 (en) * | 2016-10-17 | 2018-04-19 | GM Global Technology Operations LLC | Three-electrode test cell |
| CN111129432A (en) * | 2019-11-28 | 2020-05-08 | 浙江浙能技术研究院有限公司 | Novel reference electrode and three-electrode system for nondestructive testing of lithium ion battery industry and method |
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Application publication date: 20201106 |