Vertical multifunctional double-electrolyte lithium air battery mold

Abstract

The utility model relates to a vertical multifunctional double-electrolyte lithium air battery mold. The battery cathode side shell and the battery anode side shell are respectively provided with a sealing groove and are respectively provided with an annular blind hole and an annular through hole, and the non-woven fabric diaphragms are arranged on the left side and the right side of the perforated electrolyte cavity; the positive electrode of the battery is arranged above the non-woven fabric diaphragm; the positive current collector is used for compressing; the negative current collector is arranged at the bottom of the annular blind hole and penetrates through the bottom end of the shell; the lithium sheet is arranged above the negative electrode current collector of the annular blind hole of the battery negative electrode side shell; the glass fiber membrane is arranged above the lithium sheet; the ceramic composite electrolyte conductor film is fixed on the lower end surface of the negative electrode of the perforated electrolyte chamber; the perforated electrolyte chamber is screwed into the internal annular through hole and the annular blind hole along the sealing grooves of the battery positive electrode shell and the battery negative electrode side shell; the battery anode shell and the battery cathode shell are connected together through the threads; the positive current collector penetrates through the top end of the battery positive side shell; threaded connection is adopted, and assembling is convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electrochemistry, more particularly to a vertical multifunctional double electrolyte lithium air battery mold. BACKGROUND

[0002] Lithium ion batteries have been in all aspects of our life for a long time, but with the continuous improvement of the level of technology, people's demand for energy increases, and the traditional lithium ion battery has been unable to meet people's normal demand for life, so researchers in various countries are working hard to research new energy. Lithium air battery is widely studied by scholars in various countries because of its super energy density. Among many metal air batteries, lithium air battery has the highest energy density (11140Wh·g -1 ) which is more than 10 times of lithium ion battery, and is comparable to fossil fuels and is the most widely studied. However, lithium air battery itself has many problems such as side reactions. Lithium air battery still has a long way to go to achieve commercialization. But its super high energy density is still the most competitive energy storage device in the future.

[0003] However, the current research is mainly on organic system lithium air battery. The reaction between organic electrolyte and lithium sheet is mild, which greatly solves the safety problem caused by the violent reaction between aqueous electrolyte and lithium sheet. However, this battery brings a problem that the discharge product Li2O2 is insoluble in organic electrolyte and is an irreversible reaction. With the progress of electrochemical reaction, the deposition of discharge product blocks the positive electrode, causing the battery to fail. The product has poor conductivity, which increases the internal resistance of the battery and terminates the reaction in advance. The overpotential of the double electrolyte lithium air battery is smaller, and the open circuit voltage is higher. The discharge product LiOH is insoluble and blocks the porous positive electrode. The aqueous electrolyte has a high Li + and O2diffusion coefficient, and the cathode electrolyte is not flammable, and can overcome the defects of the violent reaction between the aqueous electrolyte and lithium sheet in the aqueous electrolyte battery and the toxicity of the organic electrolyte lithium air battery electrolyte, which has attracted high attention. Utility model content

[0004] The utility model provides a vertical multifunctional double electrolyte lithium air battery mold, which is convenient and fast to assemble. Moreover, it can perform two experiments on one mold, which can test different positive sheets, and can also replace different electrolytes. This unique design greatly improves work efficiency and enables the originally tedious test work to be completed in a shorter time. At the same time, it can also avoid waste of resources and make limited resources more reasonably and efficiently utilized.

[0005] The technical scheme of the utility model is as follows:

[0006] A vertical multifunctional double-electrolyte lithium-air battery mold comprises a battery negative electrode side shell, a negative electrode current collector, a lithium sheet, a glass fiber membrane, a ceramic composite electrolyte conductor film, an open-hole electrolyte chamber, a non-woven fabric diaphragm, a battery positive electrode, an O-shaped sealing ring, a battery positive electrode side shell, and a positive electrode current collector.

[0007] A sealing groove is opened on the battery negative electrode side shell; an annular blind hole is opened inside, and the sealing groove and the annular blind hole axis coincide;

[0008] The battery positive electrode side shell is provided with a sealing groove corresponding to the battery negative electrode side shell;

[0009] An annular through hole is opened inside the battery positive electrode side shell, and the sealing groove and the annular through hole axis coincide;

[0010] The open-hole electrolyte chamber is in a cylindrical shape, and a partition is arranged in the middle, and the chambers on both sides of the partition are independent of each other;

[0011] The non-woven fabric diaphragm is arranged on the left and right sides of the open-hole electrolyte chamber;

[0012] The battery positive electrode is arranged above the non-woven fabric diaphragm;

[0013] The positive electrode current collector is provided with a plurality of uniform holes, and the positive electrode current collector is tightly pressed on the battery positive electrode;

[0014] The negative electrode current collector is arranged at the bottom of the annular blind hole, and the negative electrode current collector penetrates through the bottom end of the battery negative electrode side shell;

[0015] The lithium sheet is arranged above the negative electrode current collector in the annular blind hole of the battery negative electrode side shell, and the glass fiber membrane is arranged above the lithium sheet, so that the lithium sheet and the glass fiber membrane are tightly fixed together by pressing;

[0016] The ceramic composite electrolyte conductor film is fixed to the negative electrode lower end face of the open-hole electrolyte chamber;

[0017] The annular through hole of the battery positive electrode shell and the annular blind hole of the battery negative electrode shell are both provided with internal threads, and the open-hole electrolyte chamber is provided with external threads;

[0018] The open-hole electrolyte chamber is screwed into the annular through hole and the annular blind hole inside along the sealing grooves of the battery positive electrode shell and the battery negative electrode side shell; the battery positive electrode shell and the battery negative electrode shell are connected together through threads; and the positive electrode current collector penetrates through the top end of the battery positive electrode side shell;

[0019] An O-shaped sealing ring is arranged between the battery positive electrode side shell and the battery negative electrode side shell, and the O-shaped sealing ring is arranged in the sealing groove of the battery positive and negative electrode side shell;

[0020] The outer diameter of the opening electrolyte chamber corresponds to the inner diameter of the annular blind hole of the negative electrode side shell and the annular through hole of the positive electrode side shell.

[0021] The base of the positive electrode is carbon paper, carbon cloth or foamed nickel.

[0022] The materials of the negative electrode side shell, the positive electrode side shell and the opening electrolyte chamber are phenolic resin or polyethylene.

[0023] The materials of the positive electrode current collector and the negative electrode current collector are stainless steel, copper alloy or aluminum alloy.

[0024] The preparation method and operation steps of the vertical multifunctional double-electrolyte lithium-air battery mold are as follows:

[0025] Step one: complete the entire battery assembly in a glove box with less than 0.1 ppm of water and oxygen;

[0026] Step two: stand the negative electrode side shell upright, and sequentially put the lithium sheet and the glass fiber membrane with a smooth surface into the negative electrode side shell, and drop an appropriate amount of negative electrolyte on the glass fiber membrane, wherein the negative electrolyte is prepared by mixing double-trifluoromethane sulfonimide lithium and tetraethylene glycol dimethyl ether at a ratio of 1:1;

[0027] Step three: fix the ceramic composite electrolyte conductor film on the negative side of the opening electrolyte chamber, assemble the opening electrolyte chamber into the negative electrode side shell, add water-based electrolyte into the opening electrolyte chamber, wherein the water-based electrolyte is a lithium salt aqueous solution, and the non-woven fabric diaphragm is arranged on both sides of the opening electrolyte chamber to prevent the water-based electrolyte from evaporating, then the positive electrode buckle is placed on the non-woven fabric diaphragm, the positive electrode current collector is tightly pressed on the positive electrode, and the positive electrode shell and the negative electrode side shell are tightly screwed. Beneficial effects

[0028] The mold structure of the utility model is innovative and improved, two experiments can be carried out on one mold, different positive electrode sheets can be tested, and different electrolytes can be replaced, the design greatly improves work efficiency, and originally complicated test work can be completed in a shorter time. At the same time, it can also avoid the waste of resources, so that the limited resources are more reasonably and efficiently utilized. The porous positive electrode current collector ensures air transmission, the overall structure is connected by threads, and the assembly is convenient and flexible. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The whole structure of the vertical multifunctional dual electrolyte lithium air battery mold is shown in the schematic diagram.

[0030] Figure 2 The battery structure is shown in the exploded view.

[0031] Figure 3 The connection profile of the battery positive side shell and the battery negative side shell is shown.

[0032] Figure 4 The constant current constant volume charging and discharging test under the action of air is shown.

[0033] In the figure: 1-battery positive side shell, 2-positive current collector, 3-battery positive electrode, 4-non-woven fabric diaphragm, 5-porous electrolyte chamber, 6-O-ring, 7-ceramic composite electrolyte conductor film, 8-glass fiber membrane, 9-lithium sheet, 10-battery negative side shell, 11-negative current collector, 12-sealing groove, 13-annular blind hole, 14-separator, 15-annular through hole. DETAILED DESCRIPTION

[0034] As shown in Figures 1-4 , a vertical multifunctional dual electrolyte lithium air battery mold includes a negative current collector 11, a battery negative side shell 10, a lithium sheet 9, a glass fiber membrane 8, a ceramic composite electrolyte conductor film 7, an O-ring 6, a porous electrolyte chamber 5, a non-woven fabric diaphragm 4, a battery positive electrode 3, a positive current collector 2, and a battery positive side shell 1.

[0035] The battery negative side shell 10 is provided with a sealing groove 12 above it; an annular blind hole 13 is opened inside it, and the axis of the sealing groove 12 and the annular blind hole 13 coincide.

[0036] The battery positive side shell 1 is provided with a sealing groove 12 corresponding to the battery negative side shell 10.

[0037] The battery positive side shell 1 is provided with an annular through hole 15 inside it.

[0038] The porous electrolyte chamber 5 is cylindrical, with a separator 14 in the middle, and the chambers on both sides of the separator 14 are independent of each other.

[0039] The non-woven fabric diaphragm 4 is arranged on the left and right sides of the porous electrolyte chamber 5.

[0040] The battery positive electrode 3 is arranged above the non-woven fabric diaphragm 4.

[0041] The positive current collector 2 is provided with a plurality of uniform holes, and the positive current collector 2 is tightly pressed on the battery positive electrode 3.

[0042] The negative current collector 11 is arranged at the bottom of the annular blind hole 13, and the negative current collector 11 penetrates through the bottom end of the battery negative side shell 10.

[0043] The lithium sheet 9 is arranged above the negative current collector 11 in the annular blind hole 13 of the battery negative side shell 10, and the glass fiber film 8 is arranged above the lithium sheet 9, and the lithium sheet 9 and the glass fiber film 8 are fixed by being pressed to adhere to each other;

[0044] The ceramic composite electrolyte conductor film 7 is fixed to the lower end face of the open electrolyte chamber 5;

[0045] The annular through hole 15 of the battery positive shell 1 and the annular blind hole 13 of the battery negative shell 10 are both internally threaded, and the open electrolyte chamber 5 is externally threaded;

[0046] The open electrolyte chamber 5 is screwed into the annular through hole 15 and the annular blind hole 13 inside the sealing groove 12 of the battery positive shell 1 and the battery negative side shell 10; the battery positive shell 1 and the battery negative shell 10 are connected together by threads; the positive current collector 2 penetrates the top end of the battery positive side shell 1;

[0047] An O-shaped sealing ring 6 is arranged between the battery positive side shell 1 and the battery negative side shell 10, and the O-shaped sealing ring 6 is arranged in the sealing groove 12 of the battery negative side shell 10;

[0048] The outer diameter of the open electrolyte chamber 5 corresponds to the inner diameter of the through hole 15 of the battery negative side shell 10 and the battery positive side shell 1.

[0049] The base of the battery positive electrode 3 is carbon paper, carbon cloth or foamed nickel. The materials of the battery negative side shell 10, the battery positive side shell 1 and the open electrolyte chamber 5 are phenolic resin or polyethylene.

[0050] The materials of the positive current collector 2 and the negative current collector 11 are stainless steel, copper alloy or aluminum alloy.

[0051] A vertical multifunctional double-electrolyte lithium-air battery mold preparation method and operation steps are as follows:

[0052] The ceramic composite electrolyte conductor film 7 is adhered to the negative side of the open electrolyte chamber 5 by epoxy resin, and is left to stand for 24 hours;

[0053] The entire battery is assembled in a glove box with a water and oxygen content of less than 0.1 ppm;

[0054] The battery negative side shell 10 is placed vertically, the lithium sheet 9 and the glass fiber film 8 are sequentially placed inside the battery negative side shell 10, and a mixed solution of the negative side organic electrolyte bis-trifluoromethanesulfonylimide lithium and tetraethylene glycol dimethyl ether is added dropwise on the glass fiber film 8.

[0055] Insert the open-cell electrolyte chamber 5 inside the battery negative side shell 10, and stand the battery vertically;

[0056] Configure 1 mol / L LiI solution, and add the positive side electrolyte into the open-cell electrolyte chamber 5 by a pipette;

[0057] Place the non-woven fabric 4 on both sides of the open-cell electrolyte chamber 5, and place the positive plate 3 directly above;

[0058] Press the positive current collector 2 on the positive plate 3, and place the O-ring 6 in the sealing groove between the battery negative side shell 10 and the positive shell 1, and connect the positive and negative shells by threads;

[0059] Perform constant current and constant volume charge and discharge test on the assembled vertical multifunctional dual-electrolyte lithium-air battery, and the protection voltage is 1.5 V-5 V, and the current density of the battery charge and discharge test is 0.1 mA / cm 2 , and the limit to the reverse capacity is 100 mAh / g.

[0060] Figure 4 For constant volume charge and discharge test in air, it can be seen that the vertical multifunctional dual-electrolyte lithium-air battery of the technical solution has a small overpotential and a stable discharge platform. The figure fully illustrates that the vertical multifunctional dual-electrolyte lithium-air battery has good electrochemical performance.

Claims

1. A vertical multifunctional dual electrolyte lithium-air battery mold, characterized by, The battery negative electrode side shell, negative electrode current collector, lithium sheet, glass fiber membrane, ceramic composite electrolyte conductor film, open hole electrolyte chamber, non-woven fabric diaphragm, battery positive electrode, O-shaped sealing ring, battery positive electrode side shell and positive electrode current collector are provided. The battery negative electrode side shell is provided with a sealing groove on the top. The battery positive electrode side shell is provided with a sealing groove corresponding to the battery negative electrode side shell. The battery positive electrode side shell is provided with a through hole inside, and the sealing groove is coincident with the axis of the annular through hole. The open hole electrolyte chamber is a cylindrical type, and a partition plate is arranged in the middle, and the chambers on both sides of the partition plate are independent of each other. The non-woven fabric diaphragm is arranged on the left and right sides of the open hole electrolyte chamber. The battery positive electrode is arranged above the non-woven fabric diaphragm. The positive electrode current collector is provided with a plurality of uniform holes, and the positive electrode current collector is tightly pressed on the battery positive electrode. The negative electrode current collector is arranged at the bottom of the annular blind hole, and the negative electrode current collector penetrates through the bottom end of the battery negative electrode side shell. The lithium sheet is arranged above the negative electrode current collector in the annular blind hole of the battery negative electrode side shell, and the glass fiber membrane is arranged above the lithium sheet, and the lithium sheet and the glass fiber membrane are tightly fixed together by pressing. The ceramic composite electrolyte conductor film is fixed to the negative end face of the open hole electrolyte chamber. The annular through hole of the battery positive electrode shell and the annular blind hole of the battery negative electrode shell are both provided with internal threads, and the open hole electrolyte chamber is provided with external threads. The open hole electrolyte chamber is screwed into the annular through hole and the annular blind hole inside along the sealing groove of the battery positive electrode shell and the battery negative electrode side shell; the battery positive electrode shell and the battery negative electrode shell are connected together through threads; and the positive electrode current collector penetrates through the top end of the battery positive electrode side shell. An O-shaped sealing ring is arranged between the battery positive electrode side shell and the battery negative electrode side shell, and the O-shaped sealing ring is arranged in the sealing groove of the battery positive electrode side shell and the battery negative electrode side shell.

2. The vertical multifunctional dual electrolyte lithium-air battery cell mold according to claim 1, characterized in that, The outer diameter of the open hole electrolyte chamber corresponds to the inner diameter of the annular blind hole of the battery negative electrode side shell and the annular through hole of the battery positive electrode side shell.

3. The vertical multifunctional dual electrolyte lithium-air battery cell mold according to claim 1, wherein, The base of the battery positive electrode is carbon paper, carbon cloth or foamed nickel.

4. The vertical multifunctional dual electrolyte lithium-air battery cell mold according to claim 1, wherein, The materials of the battery negative electrode side shell, the battery positive electrode side shell and the open hole electrolyte chamber are phenolic resin or polyethylene.

5. The vertical multifunctional dual electrolyte lithium-air battery cell mold according to claim 1, wherein, The materials of the positive electrode current collector and the negative electrode current collector are stainless steel, copper alloy or aluminum alloy.

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