CN201897584U - Powder microelectrode electrolytic cell used for electrochemical measurement - Google Patents
Powder microelectrode electrolytic cell used for electrochemical measurement Download PDFInfo
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- CN201897584U CN201897584U CN2010202682695U CN201020268269U CN201897584U CN 201897584 U CN201897584 U CN 201897584U CN 2010202682695 U CN2010202682695 U CN 2010202682695U CN 201020268269 U CN201020268269 U CN 201020268269U CN 201897584 U CN201897584 U CN 201897584U
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- electrolytic cell
- cylinder body
- electrochemical measurement
- insulating cylinder
- microelectrode
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Abstract
The utility model discloses a powder microelectrode electrolytic cell used for electrochemical measurement, which comprises an insulated tube body; a screw hole with an upper opening is arranged in the insulated tube body, the bottom of the screw hole is provided with a metal conductor, the upper end of the insulated tube body is provided with an upper plunger piston connected with the screw hole, a glass tubular column is connected in the upper plunger piston in a sealing way, a platinum wire is arranged in the glass tubular column, and fuse sealing is arranged between the platinum wire and the lower port of the glass tubular column; the powder microelectrode electrolytic cell is mainly used for microelectrode testing for samples sensitive to environment, and the design of the electrolytic cell ensures the sealing performance and is suitable for the electrochemical measurement of the electrochemical system sensitive to air, water and the like; the powder microelectrode electrolytic cell has the advantages of simple structure, convenient operation and good practicability, is time-saving and labor saving, and saves resources; the electrode material is screened at the initial stage of the battery design so as to aid the battery design and provide directional guidance for the battery design, and is beneficial for the targeted optimization of the battery.
Description
Technical field
The utility model relates to a kind of powder microelectrode electrolytic cell, especially a kind of lithium ion battery electrode material is carried out the powder microelectrode electrolytic cell that electrochemical measurement is used.
Background technology
Lithium ion battery is since accomplishing scale production the nineties; with other traditional secondary cell (lead-acid battery for example; Ni-MH battery and nickel-cadmium battery) superior function that can not compare and the diversity of sharp processing, captured very big market rapidly, and fast development.Be widely applied at present in the products such as mobile phone, notebook computer, PDA, video camera, digital camera, mobile DVD, MP3 and MP4, electric tool that lithium ion battery is used as power and electric bicycle also be present one just in the industry of fast development, the fast development of electric automobile provides bigger market for lithium ion battery.From the eighties in last century, lithium ion battery is exactly one of focus of international electrochemical research, now the fundamental research of lithium ion battery and the research focus that applied research remains field of chemical power source.
Along with the fast development of technology and the diversity of the market demand, people have also proposed more requirements to electronic product, and for example thinner, lighter, profile is more diversified, higher volume energy density and mass energy density, higher security, higher power etc.Along with the further investigation to lithium ion battery, the technology of lithium ion battery is also progressive constantly.According to the market demand, lithium ion battery manufacturer is continually developing new lithium ion battery.
Develop a new lithium ion battery, except structural factor, wherein the important point is the performance of both positive and negative polarity electrode material, the suitability between they and the electrolytic solution.
The method of the performance of the lithium ion battery that at present domestic general test is newly developed is to be assembled into battery with positive plate, negative plate, barrier film basically, and injection electrolytic solution carries out the test of every performance.This method can directly obtain the overall performance of test cell, and the exploitation of battery is had conclusive effect.But, this method also has its shortcoming, and the one, need cost many material resources, manpower; The 2nd, time-consuming more; The 3rd, the result of test has only reflected overall situation, can not reflect the concrete assembly in the battery, and as the situation of positive pole, negative pole or electrolytic solution, this is to still unshaped battery is particularly important.Only know problem on which assembly, could autotelicly go to improve, not so want expensive time and efforts and material to go screening.
The utility model content
Problem to be solved in the utility model provide a kind of simple in structure, easy to operate, time saving and energy saving, save the powder microelectrode electrolytic cell that resource, practical electrochemical measurement are used, be suitable for the electrochemical system of sensitivities such as air, moisture is carried out electrochemical measurement.
For addressing the above problem, the utility model by the following technical solutions:
The powder microelectrode electrolytic cell that a kind of electrochemical measurement is used, comprise insulating cylinder body, it is characterized in that: the screw that has a upper shed in the described insulating cylinder body, bottom at screw is provided with metallic conductor, the upper end of described insulating cylinder body is provided with the upper plug that is connected with screw, in upper plug, be sealedly connected with glass tube column, be provided with platinum filament in the described glass tube column, sealing by fusing between the lower port of platinum filament and glass tube column.
Below be the utility model for further improvement of these options:
The diameter of described platinum filament is 50～100 microns.
The another kind of improvement:
The cross section of described metallic conductor is the T type, and its bottom reaches the outside of insulating cylinder body, wringing fit between described metallic conductor and the edge cylindrical shell.
Further improve:
Described insulating cylinder body is provided with several supporting legs, is provided with bayonet socket between the adjacent supporting leg.
The another kind of improvement:
The bottom of described insulating cylinder body is provided with contrast electrode.
Further improve: described contrast electrode comprises the contrast electrode hole that is arranged on the insulating cylinder body shell wall, and 2～3 millimeters in aperture is plugged with stainless steel bar in the contrast electrode hole, wringing fit between described stainless steel bar and the contrast electrode hole.
Further improve: the lower end of described plunger is provided with double-screw bolt, and described double-screw bolt is threaded with screw.
Further improve: be provided with O-ring seal between the upper surface of described upper plug and insulating cylinder body.
The electrochemical research of li-ion electrode materials and test are carried out in non-aqueous system, electrolytic cell of the present invention is primarily aimed at the research of lithium ion battery material, can study positive electrode, negative material and electrolytic solution respectively, also can study the suitability between them.In addition,, and adopt the simulated battery difference, during with the powder microelectrode electrolytic cell, need in electrode material, not add cementing agent and conductive agent, but direct potential electrode material itself has been avoided the interference of other factors with direct making battery.The characteristic of lithium ion battery has been considered in the design of electrolytic cell, has guaranteed the sealing of battery.Its advantage is can obtain the situation of each assembly the lithium ion battery from the result of electro-chemical test, so that be optimized targetedly.This is particularly conducive to the screening to battery component and material at initial stage of battery design.Based on the characteristics of powder microelectrode, generally select for use two electrode electrolytic pools to get final product.If need especially, available three-electrode cell carries out the research of three-electrode system.
The sample that the utility model is mainly used in environment sensitive carries out the microelectrode test, the design of electrolytic cell has guaranteed sealing, be suitable for electrochemical measurement, for example to the research and the rapid screening of the performance of the powder electrode material of lithium ion battery to responsive electrochemical system such as air, moisture.The present invention is simple in structure, and is easy to operate, time saving and energy saving, saves resource, practical; Be very beneficial for the research of lithium ion battery electrode material; Initial stage in battery design screens electrode material, and the boosting battery design can be battery design provider tropism's guidance, helps simultaneously battery is optimized targetedly.
Below in conjunction with drawings and Examples the utility model patent is further described:
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment 1;
Accompanying drawing 2 is the upward view of accompanying drawing 1;
Accompanying drawing 3 is the structural representation of the utility model embodiment 2.
Among the figure: the 1-insulating cylinder body; The 2-screw; The 3-metallic conductor; The 4-upper plug; The 5-glass tube column; The 6-platinum filament; The 7-double-screw bolt; The 8-O-ring seal; 9-contrast electrode hole; The 10-stainless steel bar; The 11-groove; The 12-supporting leg; The 13-bayonet socket.
Embodiment
Embodiment 1, as shown in Figure 1, the powder microelectrode electrolytic cell that a kind of electrochemical measurement is used, comprise an insulating cylinder body 1, the screw 2 that has a upper shed in the described insulating cylinder body 1, the metallic conductor 3 that to be provided with a cross section in the bottom of screw 2 be the T type, its bottom reaches the outside of insulating cylinder body 1, wringing fit between described metallic conductor 3 and the edge cylindrical shell 1.
The upper end of described insulating cylinder body 1 is provided with a upper plug 4, be provided with double-screw bolt 7 in the lower end of upper plug 4, described double-screw bolt 7 is positioned at screw 2, be tightly connected by O RunddichtringO 8 between the upper end of upper plug 4 and insulating cylinder body 1, be provided with a glass tube column 5 in upper plug 4 and double-screw bolt 7, the bottom of glass tube column 5 flushes with the bottom of double-screw bolt 7, is provided with platinum filament 6 in glass tube column 5, sealing by fusing between the lower port of platinum filament 6 and glass tube column 5, the diameter of described platinum filament are 50～100 microns.
As shown in Figure 2, described insulating cylinder body 1 is provided with if three supporting legs 12 are provided with bayonet socket 13 between the adjacent supporting leg 12.
In the foregoing description, described supporting leg 12 not only limits to and three, passes as long as the bayonet socket 13 between the adjacent support legs 12 can hold clamp.
In the foregoing description, the material of insulating cylinder body 1 is the polymkeric substance of not having an effect with organic electrolyte, preferably polytetrafluoroethylene; The material of metallic conductor 3 is the metal material of not having an effect with organic electrolyte, is preferably stainless steel.
In the foregoing description, the material of upper plug 4 is the polymkeric substance of not having an effect with organic electrolyte, preferably polytetrafluoroethylene.
In the foregoing description, during making, earlier platinum filament 6 is flushed also sintering with the lower port of glass tube column 5, polish and expose platinum filament, then can be used as platinum microelectrode.
In the foregoing description, during making, earlier platinum filament 6 is flushed with the lower port of glass tube 3 and sintering, polish and expose platinum filament, then chloroazotic acid being put in the lower end of glass tube 3 corrodes, make platinum filament 6 indents form groove 11, when the degree of depth that erodes to groove 10 is close with the diameter of platinum filament approximately, then can be used as powder microelectrode in the lower port of glass tube column 5.
Active substance of lithium ion battery anode is dusty material normally, for example lithium and cobalt oxides (LiCoO
2), spinel lithium-manganese oxide (LiMn
2O
4), the LiFePO 4 LiFePO of olivine structural
4Usually adopt the electrochemical properties of combination electrode research dusty material Deng, people, in preparation combination electrode process, need mix cementing agent and conductive agent, also will be during measurement with very slow sweep velocity (μ Vs normally
-1Rank) carries out, very inconvenience.Use the powder microelectrode method, can directly use the electrode powder body material, sweep velocity can be brought up to mVs
-1Level, powder microelectrode has following advantage simultaneously:
1, the solutions i R influence of falling can be ignored, because the microelectrode radius is very little, the electric current that passes through is also very little, is generally 10
-7About A, can ignore, equal in hole depth under the condition of microelectrode radius, can think that the powder microelectrode internal polarization is even so solutions i R falls;
2, because double-layer capacitance is proportional to electrode area, solution resistance is inversely proportional to the radius of electrode, and the radius of microelectrode is very little, so the influence of double-layer capacitance charging current is very little, because above characteristics, powder microelectrode can adopt simple two electrode systems and with respect to conventional electrodes sweep velocity faster, be the strong instrument of li-ion electrode materials research.
When as powder microelectrode lithium ion battery electrode material being measured, being assemblied in the dry glove box of battery carried out.Auxiliary electrode: metal lithium sheet is placed the bottom of insulating cylinder body 1, and the lithium sheet is put on the top of metallic conductor 3, compresses; Working electrode: the electrode material powder is placed on the sheet glass, and with glass tube 3 vertical lapping that are made into powder microelectrode, dusty material enters in the pit; In electrolytic cell, inject electrolytic solution; With upper plug 4 and insulating cylinder body 1 screwing hermetic, can experimentize.
Being assemblied in the dry glove box of electrolytic cell carried out, and before the experiment, puts into the lithium sheet on the bottom of insulating cylinder body 1, the top of metallic conductor 3 earlier, compresses; With inserting one section lithium silk in the contrast electrode hole 9, insert stainless steel bar 10 then, in insulating cylinder body 1, put into electrolytic solution more at last, with upper plug 4 and insulating cylinder body 1 screwing hermetic, can experimentize.
Claims (8)
1. powder microelectrode electrolytic cell that electrochemical measurement is used, comprise insulating cylinder body (1), it is characterized in that: the screw (2) that has a upper shed in the described insulating cylinder body (1), be provided with metallic conductor (3) in the bottom of screw (2), the upper end of described insulating cylinder body (1) is provided with the upper plug (4) that is connected with screw (2), in upper plug (4), be sealedly connected with glass tube column (5), be provided with platinum filament (6) in the described glass tube column (5), sealing by fusing between the lower port of platinum filament (6) and glass tube column (5).
2. the powder microelectrode electrolytic cell that electrochemical measurement according to claim 1 is used is characterized in that: the diameter of described platinum filament is 50～100 microns.
3. the powder microelectrode electrolytic cell that electrochemical measurement according to claim 1 is used is characterized in that: the cross section of described metallic conductor (3) is the T type, and its bottom reaches the outside of insulating cylinder body (1).Wringing fit between described metallic conductor and the edge cylindrical shell.
4. the powder microelectrode electrolytic cell that electrochemical measurement according to claim 3 is used is characterized in that: described insulating cylinder body (1) is provided with several supporting legs (12), is provided with bayonet socket (13) between the adjacent supporting leg (12).
5. the powder microelectrode electrolytic cell that electrochemical measurement according to claim 3 is used is characterized in that: described insulating cylinder body (1) bottom is provided with contrast electrode.
6. the powder microelectrode electrolytic cell that electrochemical measurement according to claim 5 is used, it is characterized in that: described contrast electrode comprises the contrast electrode hole (9) that is arranged on insulating cylinder body (1) shell wall, in contrast electrode hole (9), be plugged with stainless steel bar (10), described stainless steel bar (10) and contrast electrode hole (9) wringing fit.
7. the powder microelectrode electrolytic cell that electrochemical measurement according to claim 1 is used is characterized in that: the lower end of described plunger (4) is provided with double-screw bolt (7), and described double-screw bolt (7) is threaded with screw (2).
8. the powder microelectrode electrolytic cell that electrochemical measurement according to claim 1 is used is characterized in that: be provided with O-ring seal (8) between the upper surface of described upper plug (4) and insulating cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202682695U CN201897584U (en) | 2010-07-22 | 2010-07-22 | Powder microelectrode electrolytic cell used for electrochemical measurement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202682695U CN201897584U (en) | 2010-07-22 | 2010-07-22 | Powder microelectrode electrolytic cell used for electrochemical measurement |
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| CN201897584U true CN201897584U (en) | 2011-07-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683978A (en) * | 2020-12-18 | 2021-04-20 | 天津力神电池股份有限公司 | Electrolytic cell for testing ionic conductivity of lithium ion battery electrolyte and testing method thereof |
| CN113125531A (en) * | 2021-04-06 | 2021-07-16 | 北京理工大学 | Electrochemical testing device for three-electrode system |
-
2010
- 2010-07-22 CN CN2010202682695U patent/CN201897584U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683978A (en) * | 2020-12-18 | 2021-04-20 | 天津力神电池股份有限公司 | Electrolytic cell for testing ionic conductivity of lithium ion battery electrolyte and testing method thereof |
| CN113125531A (en) * | 2021-04-06 | 2021-07-16 | 北京理工大学 | Electrochemical testing device for three-electrode system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110713 Termination date: 20110722 |