CN116365067A - Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof - Google Patents

Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof Download PDF

Info

Publication number
CN116365067A
CN116365067A CN202310570668.9A CN202310570668A CN116365067A CN 116365067 A CN116365067 A CN 116365067A CN 202310570668 A CN202310570668 A CN 202310570668A CN 116365067 A CN116365067 A CN 116365067A
Authority
CN
China
Prior art keywords
electrolyte
zinc
ion battery
additive
propanediol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310570668.9A
Other languages
Chinese (zh)
Inventor
黄海舰
徐嘉伟
张卫新
苏建徽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Energy of Hefei Comprehensive National Science Center
Original Assignee
Institute of Energy of Hefei Comprehensive National Science Center
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Energy of Hefei Comprehensive National Science Center filed Critical Institute of Energy of Hefei Comprehensive National Science Center
Priority to CN202310570668.9A priority Critical patent/CN116365067A/en
Publication of CN116365067A publication Critical patent/CN116365067A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • 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
    • H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0002—Aqueous electrolytes
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention discloses a water-based zinc ion battery electrolyte containing a micromolecular dihydric alcohol additive and application thereof, and the water-based zinc ion battery electrolyte optimizes the electrochemical performance of the water-based zinc ion battery. Wherein the electrolyte additive is chelating agent 1, 3-propanediol; the molar concentration of the electrolyte additive is 0.8M-3.2M. 1, 3-propanediol is a chelating agent, zn can be regulated and controlled by chelation of 1, 3-propanediol and zinc ions 2+ Two-dimensional diffusion and nucleation overpotential, thinning zinc nucleation size, inhibiting dendrite growth, reducing water content in zinc complex, and inhibiting side reaction. Therefore, the 1, 3-propylene glycol is used as the additive of the aqueous zinc ion battery electrolyte, so that the cycle life of the zinc cathode can be remarkably prolonged. The 1, 3-propanediol additive has the advantages of simple preparation process, low manufacturing cost, high safety, environmental protection and the like, and has the advantages of being in the field of modification of aqueous zinc ion battery electrolyteImportant value.

Description

Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof
Technical Field
The invention relates to a water-based zinc ion battery electrolyte containing a micromolecular dihydric alcohol additive and application thereof, belonging to the field of modification of water-based zinc ion battery electrolytes.
Background
As an important aqueous rechargeable battery, aqueous Zinc Ion Batteries (ZIBs) have not only higher ionic conductivity than non-aqueous batteries, but also features of low cost, high safety, environmental friendliness, and the like, and thus are receiving close attention from industry and academia.
However, the use of water as an electrolyte by ZIBs also presents problems and challenges. For example, the electrochemical window (ESW) of aqueous electrolytes is controlled by the water molecule decomposition reaction, resulting in ESW of conventional aqueous electrolytes typically not exceeding 2.0V. This narrow ESW suppresses the ZIBs operating output voltage, resulting in insufficient energy density. Second, adverse reactions between active water molecules and electrodes in aqueous electrolytes can lead to a series of side reactions including corrosion, surface passivation and H 2 Precipitation, and the like. In addition, in the aqueous electrolyte, zn 2+ And H 2 O molecules form stable solvation ions [ Zn (H) 2 O) 6 ] 2+ The solvated shell structure has high energy barrier, high charge transfer resistance and slow dynamics in a charged state. And is H 2 Zn surrounded by O molecules 2+ Ions are difficult to effectively contact the reaction interface, [ Zn (H) 2 O) 6 ] 2+ Desolventizing must occur to participate in the subsequent reaction. In addition to the above factors, ZIBs also face the troublesome problem of dendrite growth. Specifically, due to roughness of metallic zinc itself, uneven distribution of electric field and concentration polarization, deposition of zinc ions from positive electrode to negative electrode is uneven, zn 2+ Initial surface protrusions are inevitably formed at the time of metal surface deposition, and due to the "tip effect", the protruding portions exhibit high electric field strength, zinc ions are more prone to deposit at the tips thereof, and further growth of irregular zinc dendrites is likely to pierce the separator, causing short circuit of the battery. The above problems of the ZIBs greatly reduce the coulombic efficiency and cycle performance of the battery, and commercialization and mass-scale application of the battery are hindered.
Electrolyte additives are currently being focused by many students as a low-cost, simple and effective ZIBs performance optimization modification strategy which can be extended in a large scale. The application of the electrolyte additive comprises modifying the properties of the electrolyte, such as improving the ionic conductivity, electrochemical window and the like of the electrolyte, and for a zinc cathode, the electrolyte additive can shield the high electric field at the protruding position of the surface of a zinc sheet, adjust the distribution of zinc ions on an interface and the growth direction during deposition, and inhibit the wild growth and side reaction of zinc dendrites. However, because of the complexity of the problems of the aqueous zinc ion battery system, the search of multifunctional electrolyte additives to synergistically solve the problems of zinc dendrite growth and side reactions is particularly important for the construction of high-performance aqueous zinc ion batteries.
Disclosure of Invention
Aiming at the key problems of uncontrollable zinc dendrite growth, hydrogen evolution reaction at an electrode/electrolyte interface, generation of by-product basic zinc sulfate and the like commonly existing in a zinc cathode of a water-based zinc ion battery, the invention provides the water-based zinc ion battery electrolyte containing a micromolecular dihydric alcohol additive and application thereof. The small molecular dihydric alcohol additive is organic small molecular 1, 3-propylene glycol. Wherein, the 1, 3-propylene glycol can participate in regulating and controlling the solvation structure of zinc ions hydrate, reduce the water content in the zinc complex, and inhibit the generation of Hydrogen Evolution Reaction (HER) and by-product basic zinc sulfate; zn is regulated and controlled through chelation of 1, 3-propylene glycol and zinc ions 2+ Two-dimensional diffusion and nucleation overpotential, thinning zinc nucleation crystal grain and inhibiting dendrite growth. Finally, the purposes of improving the coulomb efficiency of the battery and prolonging the cycle life of the battery are achieved.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an electrolyte additive for a water-based zinc ion battery, wherein the electrolyte additive is 1, 3-propanediol (HOCH) 2 CH 2 CH 2 OH)。
The invention also provides a water-based zinc ion battery electrolyte containing the micromolecular dihydric alcohol additive, wherein the electrolyte comprises 1, 3-propanediol, soluble zinc salt and deionized water.
Further, in the electrolyte, the molar concentration of the 1, 3-propanediol in the electrolyte is in the range of 0.8 to 3.2mol/L. For example, in the electrolyte, the molar concentration of the 1, 3-propanediol in the electrolyte is 0.8mol/L, 0.9mol/L, 1.0mol/L, 1.1mol/L, 1.2mol/L, 1.3mol/L, 1.4mol/L, 1.5mol/L, 1.7mol/L, 1.8mol/L, 1.9mol/L, 2.0mol/L, 2.1mol/L, 2.2mol/L, 2.3mol/L, 2.4mol/L, 2.5mol/L, 2.6mol/L, 2.7mol/L, 2.8mol/L, 9mol/L, 3.0mol/L, 3.1mol/L, or 3.2mol/L.
Further, the soluble zinc salt is one or two of zinc sulfate and zinc chloride.
Further, in the electrolyte, the concentration of the soluble zinc salt is 2mol/L.
The invention also provides application of the electrolyte for the water-based zinc ion battery, and the water-based rechargeable zinc ion battery is assembled by matching the electrolyte with the anode, the cathode and the diaphragm.
Further, the positive electrode material used by the water-based zinc ion battery is commercial vanadium pentoxide, the negative electrode is commercial zinc foil, and the battery diaphragm is a glass fiber diaphragm.
The technical scheme of the invention has the following action mechanism and advantages:
(1) The invention introduces the micromolecular 1, 3-propanediol additive into the electrolyte, and the hydroxyl group of the micromolecular 1, 3-propanediol additive replaces part of water molecules in a solvated shell layer, thereby reducing the water content in the zinc complex and reducing the activity H 2 The number of O molecules greatly inhibits hydrogen evolution reaction and the generation of by-product basic zinc sulfate.
(2) The invention introduces small molecule 1, 3-propanediol additive into electrolyte, and regulates Zn by chelation of 1, 3-propanediol and zinc ion 2+ Two-dimensional diffusion and nucleation overpotential, thin zinc deposition grains and inhibit dendrite growth.
(3) The electrolyte prepared by the invention is used for a water-based zinc ion battery, can inhibit hydrogen evolution reaction and side reaction, and cooperatively inhibit dendrite growth, promote smooth and compact zinc deposition, thereby remarkably improving the coulomb efficiency of a Ti// Zn asymmetric battery, prolonging the Zn// Zn symmetric battery and V 2 O 5 Cycle life of the/(Zn full cell).
(4) The electrolyte additive 1, 3-propanediol is safe, nontoxic, low in price and environment-friendly; the preparation process of the electrolyte is simple and is easy to popularize and use.
Drawings
FIG. 1 is a graph of a comparison of the surface scanning electron microscope of a zinc anode after cycling of a Zn// Zn symmetric cell in the electrolyte prepared in example 2 and comparative example 1. As shown in the figure, at 5mA/cm -2 、5mAh/cm -2 After 100h of circulation under the test conditions of (2) mol/LZnSO was used 4 The symmetric cell zinc negative electrode of the electrolyte exhibited a significantly rugged surface (fig. 1 a), indicating irregular deposition of zinc in the comparative electrolyte; in the case of using 2mol/L ZnSO 4 In the case of +1.6 mol/L1, 3-propanediol electrolyte (FIG. 1 b), the surface of the zinc anode of the symmetrical cell was smoother, indicating that the 1, 3-propanediol additive has a promoting effect on uniform deposition of zinc.
Fig. 2 is an electrochemical Hydrogen Evolution Reaction (HER) curve of zinc electrode in the electrolyte formulated in example 2 and comparative example 1. The result shows that the hydrogen evolution overpotential is obviously shifted negatively after the additive is used, which shows that the use of the electrolyte additive has positive effect on the inhibition of the hydrogen evolution reaction of the electrolyte.
FIG. 3 is a graph showing the chronoamperometric profile of zinc electrodes in the electrolytes prepared in example 2 and comparative example 1. As shown, at a constant overpotential of-150 mV, the current in the zinc sulfate solution increased continuously over 250s, which is comparable to Zn 2+ 2D diffusion correlation of (c); on the contrary, for the zinc sulfate/1, 3-propylene glycol mixed solution, the current is kept stable in a short time, which indicates that 3D diffusion is dominant, the two-dimensional diffusion of the zinc complex is inhibited, and zinc ions are more prone to local in-situ deposition, so that dendrite growth can be effectively inhibited.
FIG. 4 is a graph of the cycling performance of Zn// Zn symmetric cells in the electrolytes formulated in example 2 and comparative example 1. As shown in the figure, at 5mA/cm -2 、5mAh/cm -2 Under test conditions using 2mol/L ZnSO 4 The symmetrical battery of the electrolyte stably circulates for 95 hours, and then irreversible polarization phenomenon appears, which indicates that the battery is damagedThe method comprises the steps of carrying out a first treatment on the surface of the In the case of using 2mol/L ZnSO 4 Under the condition of +1.6mol/L1, 3-propanediol electrolyte, the nucleation overpotential is obviously improved, which is helpful for refining nucleation grains and promoting the uniform deposition of zinc. In the electrolyte system, the cycle life of the symmetrical battery is as high as 700h and is far longer than that of the symmetrical battery without the additive (95 h), which shows that the long cycle stability of the zinc cathode is greatly improved by using the additive.
FIG. 5 is a graph of the cycling performance of Zn// Zn symmetric cells in the electrolytes formulated in example 1 and comparative example 1. As shown in the figure, at 5mA/cm -2 、5mAh/cm -2 Under test conditions using 2mol/L ZnSO 4 The symmetrical battery of the electrolyte stably circulates for 95 hours, and then irreversible polarization phenomenon appears, which indicates that the battery is damaged; in the case of using 2mol/L ZnSO 4 In the case of +0.8mol/L1, 3-propanediol electrolyte, the cycle performance of the symmetrical cell was improved but the improvement was not apparent. This is probably due to the fact that the amount of 1, 3-propanediol used is insufficient, resulting in an inability to fully exert the effect of the additive.
FIG. 6 is a graph of the cycling performance of Zn// Zn symmetric cells in the electrolytes formulated in example 3 and comparative example 1. As shown in the figure, at 5mA/cm -2 、5mAh/cm -2 Under test conditions of (2) mol/LZnSO 4 The symmetrical battery of the electrolyte stably circulates for 95 hours, and then irreversible polarization phenomenon appears, which indicates that the battery is damaged; in the use of 2mol/LZnSO 4 In the case of +3.2 mol/L1, 3-propanediol electrolyte, the cycle life of the symmetric cell is 545h, slightly less than that of using 2mol/LZnSO 4 Cycle life of the symmetrical cell at +1.6mol/L1, 3-propanediol electrolyte (700 h). This may be due to the fact that excessive 1, 3-propanediol causes a further increase in the nucleation overpotential of zinc, resulting in higher polarization and thus a decrease in battery performance.
Fig. 7 is a graph of coulombic efficiency of Ti// Zn asymmetric cells in the electrolyte formulated in example 2 and comparative example 1. As shown in the figure, at 2mA/cm -2 、1mAh/cm -2 Under test conditions of (2) mol/LZnSO 4 The zinc ion cell of the electrolyte decays in coulombic efficiency after 50 depositions/peelings due to dendrite growth and by-product generation during cyclingAs a result, non-conductive byproducts adhere to the electrode surface, consuming excess ions and electrons, and reducing coulombic efficiency. However, after 1, 3-propanediol was added, the coulombic efficiency was significantly increased, indicating that 1, 3-propanediol has a certain inhibition effect on the occurrence of zinc negative side reaction, formation of zinc dendrite, and thus improving the reversibility of zinc deposition/stripping process.
Fig. 8 is a graph showing the cycle performance and coulombic efficiency of button zinc ion batteries assembled from vanadium pentoxide as the positive electrode in the electrolytes configured in example 2 and comparative example 1. As shown, under test conditions of 5A/g, 2mol/LZnSO was used 4 After 2000 cycles of the zinc ion battery assembled by the electrolyte, the specific discharge capacity is only 111mAh/g; in the use of 2mol/LZnSO 4 Under the condition of +1.6mol/L1, 3-propanediol electrolyte, the zinc ion battery still has 133mAh/g after 3200 cycles of circulation, and the circulation coulomb efficiency is maintained above 99%. The results show that the 1, 3-propanediol as an electrolyte additive significantly improves the cycle performance of the aqueous zinc ion battery.
Detailed description of the preferred embodiments
The following examples are intended to illustrate this content in further detail; the scope of the claims is not limited by the examples.
Example 1:2mol/L ZnSO 4 Preparation of +0.8mol/L1, 3-propanediol electrolyte
A small molecular dihydric alcohol electrolyte additive and application thereof in electrolyte and zinc ion batteries, wherein the electrolyte additive is 1, 3-propanediol, and the electrolyte formula comprises 1, 3-propanediol, soluble zinc salt and deionized water. The zinc salt is zinc sulfate (ZnSO) 4 ) The solvent is deionized water. The configuration method comprises the following steps:
(1) 28.756g of solid ZnSO was weighed out 4 ·7H 2 O, 35ml of deionized water was added and stirred well until completely dissolved.
(2) 2.89ml of chelating agent 1, 3-propanediol are measured and added to the ZnSO obtained in (1) 4 The solution was stirred well until well mixed.
(3) The solution in (2) was transferred to a 50ml dry volumetric flask, deionized water was added, and the volume was set to 50ml.Shaking to obtain electrolyte (2 mol/LZnSO) prepared in example 1 4 +0.8 mol/L1, 3-propanediol).
The electrolyte is applied to a water-based zinc ion battery, and comprises the following steps:
(1) Assembling and testing of Ti// Zn asymmetric cells:
preparation of a positive electrode plate: titanium foil with a thickness of 20 μm was wiped clean with absolute ethyl alcohol and then punched into a disk (diameter of 12 mm) as a positive electrode sheet.
Preparation of a negative electrode plate: a zinc foil with a thickness of 80 μm was subjected to ultrasonic treatment in absolute ethanol, washed, dried, and then punched into a wafer (diameter: 12 mm) as a negative electrode sheet.
Preparation of the battery: using a commercial CR2032 electrode housing, a glass fiber (diameter of 16 mm) diaphragm was used as the diaphragm, 150 μl of electrolyte was dropped, the battery was assembled in the order of negative electrode housing-negative electrode sheet-diaphragm-electrolyte-positive electrode sheet-stainless steel sheet-spring sheet-positive electrode housing, and after the assembly, the battery was pressure-packaged to obtain a Ti// Zn asymmetric battery. The assembled battery is subjected to constant-current charge and discharge test at 25 ℃ with current density of 2mAh/cm -2 The surface capacity is 1mAh/cm -2 The cut-off voltage was 0.2V.
(2) Assembling and testing Zn// Zn symmetrical battery:
preparation of positive/negative electrode plates: a zinc foil with a thickness of 80 μm was subjected to ultrasonic treatment in absolute ethanol, washed, dried, and then punched into a wafer (diameter: 12 mm) as a positive/negative electrode sheet.
Preparation of the battery: the commercial CR2032 electrode shell is used, a glass fiber (diameter is 16 mm) diaphragm is adopted as the diaphragm, 150 mu L of electrolyte is dripped, the battery is assembled according to the sequence of a negative electrode shell, a negative electrode plate, the diaphragm, the electrolyte, a positive electrode plate, a stainless steel sheet, a shrapnel and a positive electrode shell, and the Zn// Zn symmetrical battery is manufactured by pressurizing and packaging after the battery is assembled. The assembled battery is subjected to constant-current charge and discharge test at 25 ℃ with current density of 5mAh/cm -2 The surface capacity is 5mAh/cm -2 。
(3)V 2 O 5 Assembling and testing of the/(Zn) full cell:
preparation of a positive electrode plate: dissolving polyvinylidene fluoride in N-methylIn the radical pyrrolidone, then V 2 O 5 The positive electrode material and acetylene black are added after being ground uniformly, mixed uniformly to form slurry, and coated (coating density is 1mg/cm 2 ) The positive electrode sheet was obtained by drying a titanium foil having a thickness of 20. Mu.m. The mass ratio of the positive electrode material to the active carbon to the polyvinylidene fluoride is 7:2:1.
Preparation of a negative electrode plate: a zinc foil with a thickness of 80 μm was subjected to ultrasonic treatment in absolute ethanol, washed, dried, and then punched into a wafer (diameter: 16 mm) as a negative electrode sheet.
Preparation of the battery: using commercial CR2032 type electrode casing, using glass fiber (diameter of 16 mm) membrane as membrane, dripping 150 μl of electrolyte, assembling the battery in the order of negative electrode casing-negative electrode sheet-membrane-electrolyte-positive electrode sheet-stainless steel sheet-elastic sheet-positive electrode casing, and pressurizing and packaging to obtain V 2 O 5 And a complete cell of/(Zn). And carrying out constant-current charge and discharge test on the assembled battery at 25 ℃ to obtain the battery with the current density of 5A/g.
Example 2:2mol/L ZnSO 4 Preparation of +1.6mol/L1, 3-propanediol electrolyte
A small molecular dihydric alcohol electrolyte additive and application thereof in electrolyte and zinc ion batteries, wherein the electrolyte additive is 1, 3-propanediol, and the electrolyte formula comprises 1, 3-propanediol, soluble zinc salt and deionized water. The zinc salt is zinc sulfate (ZnSO) 4 ) The solvent is deionized water. The configuration method comprises the following steps:
(1) 28.756g of solid ZnSO was weighed out 4 ·7H 2 O, 35ml of deionized water was added and stirred well until completely dissolved.
(2) Weighing 5.78ml of chelating agent 1, 3-propanediol, adding into ZnSO obtained in (1) 4 The solution was stirred well until well mixed.
(3) The solution in (2) was transferred to a 50ml dry volumetric flask, deionized water was added, and the volume was set to 50ml. Shaking to obtain electrolyte (2 mol/LZnSO) prepared in example 2 4 +1.6 mol/L1, 3-propanediol).
The electrolyte is applied to a water-based zinc ion battery, and comprises the following steps:
the battery assembly sequence and test conditions were the same as in example 1, except that the additive concentration in the electrolyte was different from example 1.
Example 3:2mol/L ZnSO 4 Preparation of +3.2 mol/L1, 3-propanediol electrolyte
A small molecular dihydric alcohol electrolyte additive and application thereof in electrolyte and zinc ion batteries, wherein the electrolyte additive is 1, 3-propanediol, and the electrolyte formula comprises 1, 3-propanediol, soluble zinc salt and deionized water. The zinc salt is zinc sulfate (ZnSO) 4 ) The solvent is deionized water. The configuration method comprises the following steps:
(1) 28.756g of solid ZnSO was weighed out 4 ·7H 2 O, 35ml of deionized water was added and stirred well until completely dissolved.
(2) 11.56ml of chelating agent 1, 3-propanediol are measured and added to the ZnSO obtained in (1) 4 The solution was stirred well until well mixed.
(3) The solution in (2) was transferred to a 50ml dry volumetric flask, deionized water was added, and the volume was set to 50ml. Shaking to obtain electrolyte (2 mol/LZnSO) prepared in example 3 4 +3.2 mol/L1, 3-propanediol).
The electrolyte is applied to a water-based zinc ion battery, and comprises the following steps:
the battery assembly sequence and test conditions were the same as in example 1, except that the additive concentration in the electrolyte was different from example 1.
Comparative example 1:2mol/L ZnSO 4 Preparation of electrolyte
A small molecular dihydric alcohol electrolyte additive and application thereof in electrolyte and zinc ion battery, wherein the electrolyte formula comprises soluble zinc salt and deionized water. The zinc salt is zinc sulfate (ZnSO) 4 ) The solvent is deionized water. The configuration method comprises the following steps:
(1) 28.756g of solid ZnSO was weighed out 4 ·7H 2 O, 35ml of deionized water was added and stirred well until completely dissolved.
(2) The solution in (1) was transferred to a 50ml dry volumetric flask, deionized water was added, and the volume was set to 50ml. Shaking to obtain electrolyte (2 mol/LZn) prepared in comparative example 1SO 4 )。
The electrolyte is applied to a water-based zinc ion battery, and comprises the following steps:
the battery assembly sequence and test conditions were the same as in example 1, except that the additive concentration in the electrolyte was different from example 1.
The present invention is not described in detail in part as being well known to those skilled in the art. The above examples are merely illustrative of preferred embodiments of the invention, which are not exhaustive of all details, nor are they intended to limit the invention to the particular embodiments disclosed. Various modifications and improvements of the technical scheme of the present invention will fall within the protection scope of the present invention as defined in the claims without departing from the design spirit of the present invention.

Claims (8)

1. The aqueous zinc ion battery electrolyte containing the micromolecular dihydric alcohol additive is characterized by comprising soluble zinc salt, deionized water and an additive 1, 3-propylene glycol.
2. The electrolyte of claim 1, wherein the molar concentration of the 1, 3-propanediol in the electrolyte is in the range of 0.8 to 3.2mol/L.
3. The electrolyte of claim 1 wherein the soluble zinc salt used in the aqueous zinc-ion battery electrolyte is one or both of zinc sulfate and zinc chloride.
4. Electrolyte according to claim 1, characterized in that the molar concentration of the soluble zinc salt is 2mol/L.
5. Use of the electrolyte according to any one of claims 1 to 3, wherein the electrolyte is assembled into an aqueous rechargeable zinc-ion battery by matching the electrolyte with a positive electrode, a negative electrode and a separator.
6. The use of claim 5, wherein the battery anode is vanadium pentoxide.
7. The use of claim 5, wherein the battery cathode is zinc foil.
8. The use of claim 5, wherein the battery separator is a fiberglass separator.
CN202310570668.9A 2023-05-19 2023-05-19 Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof Pending CN116365067A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310570668.9A CN116365067A (en) 2023-05-19 2023-05-19 Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310570668.9A CN116365067A (en) 2023-05-19 2023-05-19 Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof

Publications (1)

Publication Number Publication Date
CN116365067A true CN116365067A (en) 2023-06-30

Family

ID=86922485

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310570668.9A Pending CN116365067A (en) 2023-05-19 2023-05-19 Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof

Country Status (1)

Country Link
CN (1) CN116365067A (en)

Similar Documents

Publication Publication Date Title
CN113054165B (en) Negative pole piece of zinc secondary battery and preparation method and application thereof
WO2005119820A1 (en) Positive electrode active material for lithium ion secondary cell coated hetero metal oxide on the surface and lithium ion secondary cell comprising it
CN113410453B (en) Preparation method of metal-organic coordination film modified zinc cathode
CN112635698B (en) Negative pole piece of zinc secondary battery and preparation method and application thereof
CN111755699B (en) High-stability long-life metal lithium negative electrode material and preparation method and application thereof
CN114792775A (en) Polymer coating modified zinc cathode and preparation method and application thereof
CN114883670A (en) Water-based zinc ion battery electrolyte taking wheat straw extract as biomass organic salt additive and application thereof
CN116544530A (en) Water-based zinc ion battery and electrolyte thereof
CN114243027B (en) Negative current collector of sodium ion battery, preparation method of negative current collector and sodium ion battery
CN116470003A (en) Pre-lithiated negative electrode piece and lithium ion battery
CN116365067A (en) Water-based zinc ion battery electrolyte containing micromolecular dihydric alcohol additive and application thereof
CN109980226B (en) Zinc cathode with polyamide brightener layer and preparation method and application thereof
CN116487584A (en) Positive electrode composite material, preparation method thereof, positive electrode and lithium ion secondary battery
CN114243019A (en) Zinc cathode material with double modification layers on surface, preparation method thereof and application of zinc cathode material in water-based zinc ion battery
CN110808402A (en) Based on Zn (OH)42-Conductive ion battery and preparation method thereof
CN114388903B (en) Electrolyte containing organic additive for water-based zinc ion battery, preparation method of electrolyte and water-based zinc ion battery
CN114927632B (en) Modified zinc metal sheet and preparation method and application thereof
CN115036447B (en) Lithium/sodium metal battery electrode plate protective coating and preparation method thereof
CN117638259A (en) Aqueous zinc ion half-cell electrolyte, full-cell electrolyte and aqueous zinc ion battery
CN115000513A (en) Electrolyte of rechargeable magnesium battery with wide potential window and preparation method thereof
CN115528251A (en) Preparation method of self-supporting Au/rGO composite film for non-cathode battery
CN116130795A (en) Electrolyte additive and application thereof in water-based zinc ion battery
CN117712518A (en) Water-based zinc ion battery electrolyte containing trace amino acid additive and application thereof
CN116053616A (en) Additive for water-based zinc ion battery
CN117559000A (en) Preparation method and application of high-performance aqueous alkaline reversible high-voltage zinc NiCo-LDH battery electrolyte

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination