CN215496791U - Long-life zinc electrode and zinc-air secondary battery - Google Patents
Long-life zinc electrode and zinc-air secondary battery Download PDFInfo
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- CN215496791U CN215496791U CN202120613553.XU CN202120613553U CN215496791U CN 215496791 U CN215496791 U CN 215496791U CN 202120613553 U CN202120613553 U CN 202120613553U CN 215496791 U CN215496791 U CN 215496791U
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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 utility model relates to a long-life zinc electrode and a zinc-air secondary battery, belonging to the technical field of new energy storage. The long-life zinc electrode comprises a zinc plate, wherein a protective layer is arranged on the zinc plate, and the protective layer is at least one of polypropylene filter cloth, a nylon net, a Celgard 2340 diaphragm and filter paper. The zinc-air secondary battery comprises the long-life zinc electrode, an air positive electrode and electrolyte. The protective layer is arranged to protect the zinc electrode, so that the influence of zinc dendrites on the battery can be reduced, and the cycle service life and the utilization rate of the zinc electrode and the corresponding zinc-air secondary battery are obviously prolonged.
Description
Technical Field
The utility model relates to a long-life zinc electrode and a zinc-air secondary battery, belonging to the technical field of new energy storage.
Background
The development of high specific energy and clean and safe energy storage batteries with rapid economic development is an important requirement for social development. The zinc-air battery is a metal-air battery which takes metal zinc as a negative electrode and oxygen as a positive electrode active material. The theoretical energy density of the zinc-air battery is high and is 1350 Wh/kg-1About 5 times that of commercial lithium batteries. Meanwhile, the zinc-air battery also has the advantages of low cost, good safety performance, simple battery structure and the like, and is widely concerned as a low-cost green sustainable energy source. The rechargeable zinc-air battery is the key point of the current zinc-air battery research, and has important significance for promoting large-scale application of energy storage. Zinc electrodes produce dendritic zinc crystals (zinc dendrites) during charging of zinc-air batteries. The zinc dendrite growth cumulative length increases exponentially as the charging time is extended. The dendrite can not only pierce through the air electrode to cause short circuit of the battery, but also fall off from the surface of the zinc electrode to cause capacity attenuation of the battery, and the cycle life of the battery is influenced.
The zinc electrodes most widely used at present are zinc foils and zinc pastes, but regardless of the zinc material used as the negative electrode, it is difficult to prevent the zinc dendrite problem occurring during long-term cycling. Therefore, there is a need to develop a zinc electrode suitable for a rechargeable zinc-air battery, which can improve the utilization rate and reversible cyclicity of the zinc-air battery and reduce the energy loss of the secondary zinc-air battery, so as to meet the increasingly developed use requirements of the rechargeable zinc-air battery.
Disclosure of Invention
The technical problem solved by the utility model is as follows: the dendritic growth of the zinc electrode of the chargeable and dischargeable zinc-air battery affects the utilization rate and the cycle life of the zinc-air battery.
In order to solve the technical problem, the utility model provides a long-life zinc electrode which comprises a zinc plate, wherein a protective layer is arranged on the zinc plate.
Preferably, the protective layer is at least one of a polypropylene filter cloth, a nylon mesh, a Celgard 2340 diaphragm and filter paper.
Preferably, the zinc plate is provided with protective layers on both surfaces.
The utility model also provides a zinc-air secondary battery, which comprises the long-life zinc electrode, an air anode and electrolyte.
Compared with the prior art, the utility model has the following beneficial effects:
the long-life zinc electrode can effectively reduce zinc dendrites, remarkably prolong the cycle service life and the utilization rate of the zinc electrode and a corresponding zinc-air secondary battery, and has good application prospect.
Drawings
FIG. 1 is a schematic diagram of a long life zinc electrode of the present invention;
FIG. 2 is a graph showing the cycle charge and discharge performance of a zinc-air secondary battery of example 1;
FIG. 3 is a graph showing the cycle charge and discharge performance of a zinc-air secondary battery of example 2;
fig. 4 is a graph showing the cycle charge and discharge performance of the zinc-air secondary battery of the control group;
reference numerals: 1. a zinc plate; 2. a first protective layer; 3. and a second protective layer.
Detailed Description
In order to make the utility model more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Example 1
A long-life zinc electrode is shown in figure 1 and comprises a zinc plate 1, wherein a first protective layer 2 and a second protective layer 3 are respectively arranged on two surfaces of the zinc plate 1, and the first protective layer 2/the second protective layer 3 are polypropylene filter cloth.
A zinc-air secondary battery comprises the long-life zinc electrode, an air anode and electrolyte.
Example 2
A long-life zinc electrode is shown in figure 1 and comprises a zinc plate 1, wherein a first protective layer 2 and a second protective layer 3 are respectively arranged on two surfaces of the zinc plate 1, and the first protective layer 2/the second protective layer 3 are nylon meshes.
A zinc-air secondary battery comprises the long-life zinc electrode, an air anode and electrolyte.
And (3) performance testing:
the electrochemical performance of the zinc-air secondary batteries of example 1 and example 2 was tested under a constant current condition, respectively, using a zinc-air secondary battery comprising a conventional zinc electrode without a protective layer, an air positive electrode and an electrolyte as a control. The current density of charging is 5mA cm-2And charging for 5min, then performing a discharge test at the same current density for 5min, and performing a cyclic charge-discharge test under the condition to obtain a cyclic charge-discharge performance curve. The cycle charge and discharge performance curve of the zinc-air secondary battery of example 1 is shown in fig. 2, the first cycle charge voltage is about 2.08V, the discharge voltage is about 1.16V, the first cycle energy efficiency is 55.7%, and the stable charge and discharge is maintained for 6000 cycles. The cycle charge and discharge performance curve of the zinc-air secondary battery of example 2 is shown in fig. 3, the first-turn discharge voltage reaches 1.08V, the charge voltage is about 2.29V, the first-turn energy efficiency is 47.2%, and the stable charge and discharge is maintained for 5000 turns. As shown in fig. 4, the cycle charge/discharge performance curve of the zinc-air secondary battery of the control group was about 1.16V for the first cycle, about 2.02V for the charge voltage, 57.4% for the first cycle, and about 1200 cycles for the charge/discharge cycle, compared to the zinc-air secondary batteries of examples 1 and 2. Thus, the zinc-air secondary batteries of examples 1 and 2 showed better stability and utilization rate than the control group, and were more excellent in electrochemical properties. The zinc electrode provided by the utility model can reduce the influence of zinc dendrites on the battery by arranging the protective layer, and improves the cycle service life and the utilization rate of the zinc electrode and the corresponding zinc-air secondary battery.
While the utility model has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (3)
1. The long-life zinc electrode comprises a zinc plate and is characterized in that a protective layer is arranged on the zinc plate; the protective layer is at least one of polypropylene filter cloth, nylon net, Celgard 2340 diaphragm and filter paper.
2. The long life zinc electrode of claim 1 wherein said zinc plate is provided with protective layers on both surfaces.
3. A zinc-air secondary battery comprising the long-life zinc electrode according to claim 1 or 2, an air positive electrode, and an electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120613553.XU CN215496791U (en) | 2021-03-25 | 2021-03-25 | Long-life zinc electrode and zinc-air secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120613553.XU CN215496791U (en) | 2021-03-25 | 2021-03-25 | Long-life zinc electrode and zinc-air secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215496791U true CN215496791U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120613553.XU Active CN215496791U (en) | 2021-03-25 | 2021-03-25 | Long-life zinc electrode and zinc-air secondary battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN215496791U (en) |
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2021
- 2021-03-25 CN CN202120613553.XU patent/CN215496791U/en active Active
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Effective date of registration: 20230118 Address after: 201616 room 506, floor 5, building 11, No. 300, Dingyuan Road, Songjiang District, Shanghai Patentee after: Shanghai cluster Rui Low Carbon Energy Technology Co.,Ltd. Patentee after: Shanghai lanze Energy Technology Co.,Ltd. Address before: 201600 room 506, 5th floor, building 11, 300 Dingyuan Road, Songjiang District, Shanghai Patentee before: Shanghai cluster Rui Low Carbon Energy Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |