CN209878657U - Three-electrode half cell - Google Patents
Three-electrode half cell Download PDFInfo
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- CN209878657U CN209878657U CN201821895812.7U CN201821895812U CN209878657U CN 209878657 U CN209878657 U CN 209878657U CN 201821895812 U CN201821895812 U CN 201821895812U CN 209878657 U CN209878657 U CN 209878657U
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Abstract
The utility model discloses a three-electrode half-cell, which comprises a working electrode, an auxiliary electrode, a reference electrode and a diaphragm, wherein the three-electrode half-cell is a soft package packaged three-electrode half-cell; and the working electrode, the auxiliary electrode and the reference electrode are respectively provided with corresponding lugs which are respectively a working electrode lug, an auxiliary electrode lug and a reference electrode lug. The utility model discloses improve the packaging technology of three electrode half-cell among the prior art from the button cell encapsulation to soft-package encapsulation, soft-package encapsulation simple process, the preparation is rapid, and is low to the production facility requirement, and the yields is high, compares the button cell encapsulation of prior art simultaneously, and raw materials cost is lower, more is fit for using research electrode performance as the purpose, needs the three electrode half-cell of frequent change working electrode material, in addition, the utility model provides a three electrode half-cell, three electrode cell among the contrast prior art can measure working electrode's electrode material's electrical properties alone, and both can be used to the negative pole material, can be used to the electrical properties survey of positive pole material again.
Description
Technical Field
The utility model relates to an electrochemistry field especially relates to a three-electrode half cell.
Background
With the development of science and technology, the progress of modern battery technology is also changing day by day, and the battery is used as an energy source, so that the current which has stable voltage and stable current, is stably supplied for a long time and is slightly influenced by the outside can be obtained, and the battery has the advantages of simple structure, convenience in carrying, easiness and convenience in charging and discharging operation, no influence of the outside climate and temperature, stable and reliable performance and great effect on various aspects in modern social life. Therefore, many countries invest a lot of resources in battery technology, and a breakthrough is expected, wherein the performance of the battery electrode is a bottleneck restricting the development of the battery technology.
In order to research the performance of electrodes made of various materials in batteries, a three-electrode half battery is generally used, generally three motors of the three-electrode half battery are respectively a working electrode, an auxiliary electrode and a reference electrode, when the three-electrode half battery works, the auxiliary electrode is connected with external bias voltage, then the electrical parameters of the reference electrode and the working electrode are respectively measured, and the material performance of the working electrode can be obtained.
Disclosure of Invention
The utility model aims at providing a three-electrode half-cell to solve among the prior art three-electrode half-cell equipment process loaded down with trivial details, inefficiency, problem that final yields is low.
In order to solve the technical problem, the utility model provides a three-electrode half-cell, which comprises a working electrode, an auxiliary electrode, a reference electrode and a diaphragm, wherein the three-electrode half-cell is a soft package packaged three-electrode half-cell;
and the working electrode, the auxiliary electrode and the reference electrode are respectively provided with corresponding lugs which are respectively a working electrode lug, an auxiliary electrode lug and a reference electrode lug.
Optionally, in the three-electrode half cell, the three-electrode half cell is a three-electrode half cell packaged in a plastic-aluminum film.
Optionally, in the three-electrode half cell, the three-electrode half cell is a stacked cell and includes, in order from top to bottom, a working electrode, a first separator, an auxiliary electrode, a second separator, and a reference electrode.
Optionally, in the three-electrode half cell, a rigid protective layer is arranged outside the aluminum-plastic film of the three-electrode half cell.
Optionally, in the three-electrode half-cell, tab glue is arranged on the tab, and the tab can be adhered and sealed with the aluminum plastic film after being heated and melted.
Optionally, in the three-electrode half-cell, the auxiliary electrode is a metallic lithium electrode.
Optionally, in the three-electrode half-cell, the reference electrode is a metallic lithium electrode or a copper-plated lithium electrode.
Optionally, in the three-electrode half-cell, the copper lithium-plated electrode is a copper mesh lithium-plated electrode.
Optionally, in the three-electrode half cell, the working electrode tab is any one of an aluminum strip, a nickel strip or a copper-nickel-plated strip.
Optionally, in the three-electrode half-cell, the auxiliary electrode tab and the reference electrode tab are any one of a nickel strip and a copper nickel-plated strip.
The utility model provides a three-electrode half-cell, three-electrode half-cell includes working electrode, auxiliary electrode, reference electrode and diaphragm, three-electrode half-cell is soft package encapsulation's three-electrode half-cell; and the working electrode, the auxiliary electrode and the reference electrode are respectively provided with corresponding lugs which are respectively a working electrode lug, an auxiliary electrode lug and a reference electrode lug. The utility model discloses improve the packaging technology of three-electrode half-cell among the prior art from the button cell encapsulation to soft package encapsulation, soft package encapsulation simple process, the preparation is rapid, and is low to the production facility requirement, the yields is high, compares the button cell encapsulation of prior art simultaneously, and raw materials cost is lower, more is fit for using research electrode performance as the purpose, needs the three-electrode half-cell of frequent change working electrode material, in addition, the utility model provides a three-electrode half-cell, three-electrode cell among the contrast prior art, the electrical properties of the electrode material that can measure working electrode alone have improved the accuracy of electrochemistry detection data, just the utility model provides a three-electrode half-cell, both can be used to negative electrode material's electrical properties survey, can be used to positive electrode material's electrical properties survey again.
Drawings
In order to clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic top view of a three-electrode half-cell according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of a three-electrode half-cell provided in the present invention;
fig. 3 is a top view of another embodiment of a three-electrode half-cell provided by the present invention.
Detailed Description
It is noted that a cell consists of two half-cells, one undergoing oxidation and one undergoing reduction, connected by a salt bridge, in short, a half-cell is a cell consisting of an electrode of a cell and its surrounding solution undergoing reaction and a cell consisting of two electrodes and an electrolyte sandwiched therebetween. The electrochemical reaction is characterized in that the conjugated oxidation reaction and the reduction reaction are respectively carried out on the interfaces of the two electrodes.
The half cell is a cell system for independently researching the electrochemical performance of positive/negative electrode materials, takes a material to be researched as a working electrode, and is additionally provided with an auxiliary electrode and a reference electrode. The three-electrode system requires the auxiliary electrode and the reference electrode to be separated, so as to improve the testing precision.
The traditional half cell is usually assembled into a button cell, and Chinese patent CN203607508U discloses a three-electrode system cell modified on the basis of the traditional half cell, wherein a metal lithium ring is added on the basis of a laminated button cell to connect a copper core as a reference electrode, and a lead is led out from an opening on a metal shell.
Chinese patent CN106785068A discloses an assembling method of a three-electrode soft package battery. The method adopts the pole pieces made of the positive and negative pole materials and adopts the lithium piece attached to the copper mesh as the reference electrode to construct the three-electrode soft package full battery system, but the three-electrode soft package battery provided by the method cannot independently research the performance of a certain electrode material and has poor precision.
The traditional button type half cell is modified into a three-electrode system, the shell needs to be subjected to opening treatment to lead out a connecting wire of a reference electrode, the cost is greatly increased, meanwhile, the side opening increases the difficulty of cell packaging, adverse reactions such as liquid leakage and gas leakage are easily caused, and the safety performance of the cell is affected. The traditional soft package battery technology adopts a double-level system, a reference electrode is an auxiliary electrode during testing, and potential testing deviation is introduced into testing errors due to the fact that current passes through the auxiliary electrode. Although the reference electrode is introduced into the battery system in the three-electrode soft package full battery, the characteristics of the used positive electrode material/negative electrode material cannot be measured independently due to the full battery, and the improvement still remains.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a three-electrode half-cell, wherein the structural schematic diagram of one of the concrete implementation modes is shown in fig. 1, and is called as the first concrete implementation mode, the three-electrode half-cell comprises a working electrode 7, an auxiliary electrode 8, a reference electrode 9 and a diaphragm 6, and the three-electrode half-cell is a soft package packaged three-electrode half-cell;
and the working electrode 7, the auxiliary electrode 8 and the reference electrode 9 are respectively provided with corresponding lugs, namely a lug 2 of the working electrode 7, a lug 3 of the auxiliary electrode 8 and a lug 4 of the reference electrode 9.
The three-electrode soft package half battery is a three-electrode soft package half battery packaged by an aluminum plastic film; the aluminum plastic film has extremely high barrier property, good cold stamping forming property, puncture resistance, electrolyte stability and insulativity, and is very suitable for being used as the packaging material of the three-electrode half cell.
The tab is provided with tab glue 5 which can be adhered and sealed with the aluminum plastic film after being heated and melted; the sealing performance of the three-electrode half cell is further improved, and the stability and the safety of the half cell are improved.
The auxiliary electrode 8 is a metal lithium electrode.
The reference electrode 9 is a metal lithium electrode or a copper-plated lithium electrode.
The copper lithium-plating electrode is a copper mesh lithium-plating electrode.
The working electrode 7 is a tab 2 made of any one of an aluminum strip, a nickel strip or a copper nickel-plated strip.
The auxiliary electrode 8 tab 3 and the reference electrode 9 tab 4 are either a nickel strip or a copper nickel-plated strip.
Furthermore, a rigid protective layer can be arranged on the outer side of the aluminum-plastic film of the three-electrode half cell, and the three-electrode half cell can be a polymer shell, so that the danger of the three-electrode half cell caused by external force impact is prevented, and the safety is further improved.
The three-electrode half cell provided by the embodiment comprises a working electrode 7, an auxiliary electrode 8, a reference electrode 9 and a diaphragm 6, wherein the three-electrode half cell is a soft package packaged three-electrode half cell; and the working electrode 7, the auxiliary electrode 8 and the reference electrode 9 are respectively provided with corresponding lugs, namely a lug 2 of the working electrode 7, a lug 3 of the auxiliary electrode 8 and a lug 4 of the reference electrode 9. The utility model discloses improve the packaging technology of three-electrode half-cell among the prior art from the button cell encapsulation to soft-package encapsulation, soft-package encapsulation simple process, the preparation is rapid, and is low to the production facility requirement, the yields is high, compares the button cell encapsulation of prior art simultaneously, and raw materials cost is lower, more is fit for using research electrode performance as the purpose, needs the three-electrode half-cell of frequent change working electrode 7 material, in addition, the utility model provides a three-electrode half-cell, three-electrode cell among the contrast prior art can measure working electrode 7's electrode material's electrical properties alone, has improved the accuracy nature of electrochemistry detection data, just the utility model provides a three-electrode half-cell both can be used to negative electrode material's electrical properties survey, can be used to positive electrode material's electrical properties survey again.
On the basis of the above specific embodiment, the three-electrode half cell and the internal structural shape and the positional relationship thereof are further defined to obtain a second specific embodiment, a structural schematic diagram of which is shown in fig. 2, and the second specific embodiment includes a working electrode 7, an auxiliary electrode 8, a reference electrode 9 and a diaphragm 6, and the three-electrode half cell is a soft package type three-electrode half cell;
the working electrode 7, the auxiliary electrode 8 and the reference electrode 9 are respectively provided with corresponding lugs;
the three-electrode half cell is a laminated cell and sequentially comprises a working electrode 7, a first diaphragm 6, an auxiliary electrode 8, a second diaphragm 6 and a reference electrode 9 from top to bottom.
The difference between this embodiment and the above embodiment is that this embodiment limits the three-electrode half cell to a stacked cell, and the other structures are the same as those in the above embodiment, and are not described herein again.
The shell 1 of the three-electrode half cell is an aluminum-plastic film shell.
The first diaphragm 6 is not different from the second diaphragm 6, and the division of the diaphragm 6 into the first diaphragm and the second diaphragm means only that the first diaphragm 6 and the second diaphragm 6 are not directly connected.
The plan view of the present embodiment is shown in fig. 3, and the three-electrode half cell is assembled by using a stacked cell, which greatly simplifies the assembly difficulty of the three-electrode half cell and the manufacturing difficulty of each internal structure of the three-electrode half cell, and improves the manufacturing efficiency and the production yield of the three-electrode half cell.
Finally, the present invention provides a method for manufacturing a three-electrode half-cell, comprising:
step S1: and uniformly mixing the anode or cathode material to be researched with a binder and a conductive agent according to a certain proportion, coating the mixture on the surface of a current collector, and rolling and slitting the mixture after vacuum drying to obtain the working electrode 7 pole piece.
Step S2: laminating the working electrode 7, the diaphragm 6, the auxiliary electrode 8, the diaphragm 6 and the reference electrode 9 to obtain a battery core, and welding corresponding lugs on the electrodes
Step S3: stopping the cell in an aluminum-plastic film shell, coating a tab adhesive 5 at a tab, clamping the tab in a metal end socket heated to 130-1 MPa and 250 ℃, and extruding for 1-10 seconds at the pressure of 0.2-1MPa to bond the aluminum-plastic film.
Step S4: and injecting sufficient electrolyte into the battery, vacuumizing, and performing heat sealing to obtain the three-electrode soft package half battery.
After the electrolyte is fully soaked by standing, the three-electrode test device can be connected to the three-electrode test device, and the electrochemical performance of the material to be researched is tested and represented.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The above is to the three-electrode half-cell provided by the present invention. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (7)
1. A three-electrode half cell comprises a working electrode, an auxiliary electrode, a reference electrode and a diaphragm, and is characterized in that the three-electrode half cell is a soft package packaged three-electrode half cell;
the working electrode, the auxiliary electrode and the reference electrode are respectively provided with corresponding lugs which are respectively a working electrode lug, an auxiliary electrode lug and a reference electrode lug;
the three-electrode soft package half battery is a three-electrode soft package half battery packaged by an aluminum plastic film;
the three-electrode half cell is a laminated cell and sequentially comprises a working electrode, a first diaphragm, an auxiliary electrode, a second diaphragm and a reference electrode from top to bottom;
the tab is provided with tab glue which can be adhered and sealed with the aluminum plastic film after being heated and melted.
2. The three-electrode half-cell according to claim 1, wherein the three-electrode half-cell is provided with a rigid protective layer on the outside of the aluminum plastic film.
3. The three-electrode half-cell of claim 1, wherein the auxiliary electrode is a metallic lithium electrode.
4. The three-electrode half-cell according to claim 1, wherein the reference electrode is a metallic lithium electrode or a copper-plated lithium electrode.
5. The three-electrode half-cell according to claim 4, wherein said copper-plated lithium electrode is a copper mesh lithium-plated electrode.
6. The three-electrode half-cell of claim 1, wherein the working electrode tab is any one of an aluminum strip, a nickel strip, or a copper-nickel plated strip.
7. The three-electrode half-cell of claim 1, wherein the auxiliary electrode tab and the reference electrode tab are any one of a nickel strip and a copper nickel-plated strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821895812.7U CN209878657U (en) | 2018-11-16 | 2018-11-16 | Three-electrode half cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821895812.7U CN209878657U (en) | 2018-11-16 | 2018-11-16 | Three-electrode half cell |
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| Publication Number | Publication Date |
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| CN209878657U true CN209878657U (en) | 2019-12-31 |
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| CN201821895812.7U Active CN209878657U (en) | 2018-11-16 | 2018-11-16 | Three-electrode half cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280482A (en) * | 2021-12-06 | 2022-04-05 | 上海空间电源研究所 | Full cell and silicon-based material intrinsic cycle stability evaluation method based on full cell |
| CN114335920A (en) * | 2020-09-30 | 2022-04-12 | 宝武炭材料科技有限公司 | Reference electrode of lithium ion battery, three-electrode battery and preparation method of reference electrode |
| CN114464964A (en) * | 2022-03-08 | 2022-05-10 | 东莞新能安科技有限公司 | Composite electrode terminal, electrochemical device, battery module and electric equipment |
-
2018
- 2018-11-16 CN CN201821895812.7U patent/CN209878657U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335920A (en) * | 2020-09-30 | 2022-04-12 | 宝武炭材料科技有限公司 | Reference electrode of lithium ion battery, three-electrode battery and preparation method of reference electrode |
| CN114280482A (en) * | 2021-12-06 | 2022-04-05 | 上海空间电源研究所 | Full cell and silicon-based material intrinsic cycle stability evaluation method based on full cell |
| CN114464964A (en) * | 2022-03-08 | 2022-05-10 | 东莞新能安科技有限公司 | Composite electrode terminal, electrochemical device, battery module and electric equipment |
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