CN110299513B - Preparation method of lithium-philic negative electrode, lithium-philic negative electrode and lithium battery - Google Patents
Preparation method of lithium-philic negative electrode, lithium-philic negative electrode and lithium battery Download PDFInfo
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Abstract
The invention provides a preparation method of a lithium-philic negative electrode, the lithium-philic negative electrode and a lithium battery, (1) M is addedXNO3Dissolving in organic solvent mixture to obtain MxNO3A solution wherein M is a metal having lower metal activity than Li; (2) preparing a lithium-philic negative electrode: mixing the above MxNO3Dropwise adding the solution on the surface of a lithium sheet to react to generate M or M/Li alloy to obtain a lithium-philic M/Li composite electrode, and evaporating the solvent to obtain LiNO3Deposited on the surface of the composite electrode. The purpose is to optimize the preparation method of the lithium-philic matrix, and the method can not only obtain the lithium-philic negative electrode, but also obtain LiNO3. The lithium-philic negative electrode can adjust lithium nucleation and reduce overpotential. And can homogenize the lithium ion distribution and realize uniform lithium deposition.
Description
Technical Field
The invention relates to the field of metallurgical physical chemistry, in particular to a preparation method and application of a lithium-philic negative electrode.
Background
With the continuous development of electric vehicles and portable devices, the demand for high energy density battery systems is increasing. The traditional lithium ion battery cannot meet the requirement of a high-energy-density energy storage device due to low capacity and energy density. On the other hand, metallic lithium has an extremely high theoretical specific capacity (3860mAh/g), the lowest redox potential (-3.04V vs SHE). Particularly, the lithium metal battery has obvious advantages in cruising ability in the aspect of providing power for electric automobiles. The theoretical energy density of the metal lithium matched with the transition metal oxide can reach 440Wh/Kg, and the theoretical energy density matched with elemental sulfur can reach 650Wh/Kg, and the energy density has obvious advantages compared with the energy density of 300Wh/Kg of the lithium ion battery.
However, the lithium metal negative electrode is very active and easily causes a side reaction with the electrolyte, thereby accelerating the electrolyte consumption rate. And metallic lithium tends to grow linearly in two dimensions during deposition, creating lithium dendrites. On one hand, the dendrite is easy to fall off to become 'dead lithium', and the 'dead lithium' can not participate in electrochemical reaction, so that the active substance is irreversibly lost. On the other hand, the dendrites grow continuously, and easily pierce through the diaphragm, thereby generating serious potential safety hazards. In addition, the volume change of lithium metal during deposition/desorption is infinite, resulting in cell swelling.
In order to solve the above problems, patent CN 106252722a prepared an additive capable of inhibiting dendrite growth by joule heating to plate a layer of lithium-philic silver on carbon nanofibers. The process achieves uniform Deposition of Lithium due to the ability of the Lithium-philic matrix to reduce the Lithium nucleation overpotential (ultra fine Silver Nanoparticles for charged Lithium Deposition supported Lithium Metal advanced materials 2017,29 (38)).
This newly studied lithium-philic matrix provides us with a concept for stabilizing lithium deposition. However, currently most lithium-philic matrices are used in conjunction with 3D current collectors, which reduces the capacity and energy density of the overall battery system. In order to take full advantage of the extremely high specific capacity of lithium metal, it is desirable to have the lithium metal remain in its pristine state, such as in a lithium sheet. Moreover, most lithium-philic substrates have complex preparation process and high requirements on equipment, and most lithium-philic substrates cannot be realized at normal temperature.
Disclosure of Invention
The invention provides a preparation method of a lithium-philic lithium cathode, aiming at optimizing the preparation method of a lithium-philic matrix, realizing uniform lithium deposition and prolonging the service life of a metal lithium battery by adjusting lithium nucleation and homogenizing lithium ion distribution3The lithium nitrate is used as an additive of the metal lithium battery, and can stabilize the metal lithium negative electrode.
In one aspect, the present invention provides a method for preparing a lithium-philic negative electrode, comprising the steps of:
(1) will MXNO3Dissolving in organic solvent mixture to obtain MxNO3A solution, wherein M is a metal with lower metal activity than Li, and the organic solvent mixed solution contains a nitrogen-containing organic solvent;
(2) preparing a lithium-philic negative electrode: mixing the above MxNO3The solution is dripped on the surface of a lithium sheet to react to generate M or M/Li alloy and LiNO3Wherein whether M is generated or M/Li is subjected to said MXNO3The M or M/Li alloy covers the surface of the lithium sheet to form a lithium-philic M/Li composite electrode, the solvent is evaporated, and the LiNO is added3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode. Wherein M isXNO3The concentration and the dropping amount of the compound are different, so that the substances generated by the reaction are different, and the M simple substance and the LiNO are generated by the reaction3Or M/Li alloy and LiNO3。
Wherein, M is one or more of Ag, Cu, Al, Zn, Fe, Co, Ni, Sn, Au, Pt and In.
Wherein M is Ag or Al or Sn.
Wherein the nitrogen-containing organic solvent is N-methylpyrrolidone (NMP), Dimethylformamide (DMF) and acetonitrile (C)2H3N) is selected.
Wherein the organic solvent mixture further comprises one or more of dimethyl carbonate (DMC), Ethyl Methyl Carbonate (EMC), Diethyl Carbonate (DC), Ethylene Carbonate (EC), diethyl carbonate (DEC), Polycarbonate (PC), Tetrahydrofuran (THF), tetraethylene glycol dimethyl ether (TEDA), 1, 3-Dioxolane (DOL) and ethylene glycol dimethyl ether (DME).
Wherein, M isxNO3The concentration of (B) is in the range of 0.01 to 1 mol/L.
Wherein, in the step (2), MxNO3The dropping amount of (A) is 50 to 150. mu.L.
On the other hand, the invention also provides a lithium-philic negative electrode which is prepared by adopting the preparation method of the lithium-philic negative electrode.
The invention also provides a lithium battery which comprises the lithium-philic cathode and an anode, wherein the anode adopts lithium iron phosphate (LiFePO)4) Lithium manganate (LiMn)2O4) Lithium titanate (Li)4Ti5O12) Lithium nickelate (LiNiO)2) Nickel cobalt binary (LiNiCoO)2) Lithium cobaltate (LiCoO)2) Nickel cobalt manganese ternary (NCM), elemental sulfur, and organic sulfide or carbon sulfide.
The invention also provides a lithium battery, wherein the lithium battery is a symmetrical battery, the symmetrical battery comprises the lithium-philic negative electrode, and the positive electrode and the negative electrode of the symmetrical battery are the same.
The invention has the following advantages:
(1) the lithium-philic negative electrode firstly dissolves nitrate in an organic solvent of N-methyl pyrrolidone (NMP), the N-methyl pyrrolidone (NMP) disperses nitrate ions in the nitrate ions to obtain a nitrate solution, and then the nitrate solution is dripped on a lithium sheet to react to obtain metal M or M/Li alloy and LiNO3Wherein whether M is generated or M/Li is subjected to said MXNO3And the amount of dropwise addition of LiNO, the LiNO3Deposited on the M/Li composite electrode, the reaction product LiNO of the invention3Can be used as an additional additive in electricityDuring the circulation of the cell, the LiN is reduced toXOYAnd Li3And N, the solid electrolyte layer can inhibit the growth of lithium dendrites and reduce the interface impedance, thereby stabilizing the lithium deposition and prolonging the service life of the metal lithium battery, and the battery performance is reduced when the generated lithium nitrate is washed and removed. The metal M or M/Li alloy is capable of inducing lithium deposition as an active site for lithium deposition. The two functions simultaneously stabilize the metal lithium electrode, prolong the service life of the metal lithium battery, have short preparation flow in the whole process and simple process, and can be carried out at normal temperature.
(3) The generated metal M or M/Li alloy can be used as an active site for lithium deposition to induce lithium deposition and relieve dendrites.
(4) Due to the fact that the required free energy for heterogeneous nucleation is lower, when the lithium sheet is used for preparing an M/Li composite electrode for nucleation, the obstacle is smaller, the lower the required energy is, the lower the lithium nucleation overpotential is, and the nucleation and subsequent deposition of metal lithium are facilitated.
(5) The M/Li composite electrode can adjust the distribution of lithium ions, and the lithium ions can be distributed more uniformly on the M/Li composite electrode, so that uniform lithium deposition after electrochemical reduction is facilitated.
(6) When the prepared lithium-philic negative electrode is matched with other positive electrode materials, the long-life cycle of the battery can be realized.
(7) The organic solvent mixture contains nitrogen-containing organic solvent, wherein the nitrogen-containing organic solvent is N-methylpyrrolidone (NMP), Dimethylformamide (DMF) and acetonitrile (C)2H3N), the organic solvent containing nitrogen is mainly used for dispersing nitrate ions, nitrate is dissolved in the organic solvent to prepare nitrate solution, and the product LiNO is obtained through reaction3. Meanwhile, the organic solvent mixture of the present invention further comprises an ester or ether organic solvent such as dimethyl carbonate (DMC), Ethyl Methyl Carbonate (EMC), or tetraethylene glycol dimethyl ether, wherein the content of the ester or ether organic solvent is higher than that of the nitrogen-containing organic solvent, because the ester or ether organic solvent is more easily evaporated than the nitrogen-containing organic solvent, the organic solvent can be effectively evaporated in the step (2) to allow LiNO to be present3Deposited on the M/Li composite electrodeAccordingly, the organic solvent in the present invention is an organic solvent mixture containing a nitrogen-containing organic solvent.
Drawings
Fig. 1 (a) shows the lithium ion distribution of an unmodified lithium sheet;
(b) the lithium ion distribution condition of the lithium-philic composite electrode is provided for the embodiment of the invention;
(c) the nucleation overpotential condition of the unmodified lithium sheet as the negative electrode is shown;
(d) the lithium-philic composite electrode is provided for the embodiment of the invention to be used as the nucleation overpotential condition of the negative electrode;
fig. 2 is a plot of cycle number versus coulombic efficiency for a lithium battery of example 1 of the present invention;
FIG. 3 is a cycle diagram of a lithium battery in example 2 of the present invention;
FIG. 4 is a graph of the voltage profile of a lithium-philic Ag/Li composite electrode symmetrical cell (retention of the resulting LiNO)3)；
FIG. 5 is a graph of the voltage profile of a lithium-philic Ag/Li composite electrode symmetrical cell (LiNO generated by washing)3)。
Fig. 6 is a plot of number of cycles versus coulombic efficiency for a lithium battery of example 5 of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited to the following specific examples.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
in one aspect, the present embodiment provides a method for preparing a lithium-philic negative electrode, including the following steps:
(1) mixing AgNO3Dissolving in organic solvent mixed solution containing N-methylpyrrolidone (NMP) to obtain AgNO3A solution, the organic solvent further comprising 1, 3-Dioxolane (DOL) and ethylene glycol dimethyl ether (DME); wherein the volume ratio of 1, 3-Dioxolane (DOL)/ethylene glycol dimethyl ether (DME) is 1:1, the volume fraction of N-methyl pyrrolidone (NMP) is 20 percent, and AgNO3The concentration of the solution is 0.01 mol/L;
(2) preparing a lithium-philic negative electrode: mixing the AgNO3Dripping 150 mu L of solution on the surface of the lithium sheet for reaction to generate Ag and LiNO3The Ag covers the surface of the lithium sheet to form a lithium-philic Ag/Li composite electrode, the solvent is evaporated, and the LiNO is3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode.
The N-methylpyrrolidone (NMP) is a nitrogen-containing organic solvent capable of dispersing nitrate ions in an organic solvent mixture to make AgNO3Dissolving in the organic solvent mixed solution to obtain AgNO3And (3) solution. The organic solvent mixed solution also comprises 1, 3-Dioxolane (DOL) and ethylene glycol dimethyl ether (DME), the volume ratio of the 1, 3-Dioxolane (DOL) to the ethylene glycol dimethyl ether (DME) is 1:1, the volume fraction of the N-methyl pyrrolidone (NMP) is 20%, and the volume fraction of the 1, 3-Dioxolane (DOL) and the ethylene glycol dimethyl ether (DME) is far larger than that of the N-methyl pyrrolidone (NMP) mainly because the 1, 3-Dioxolane (DOL) and the ethylene glycol dimethyl ether (DME) are easier to evaporate compared with the N-methyl pyrrolidone (NMP), so that the LiNO is more easily evaporated3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode.
On the other hand, the embodiment also provides a lithium-philic negative electrode which is prepared by adopting the preparation method of the lithium-philic negative electrode.
The embodiment also provides a lithium battery, wherein the lithium battery comprises the lithium-philic Ag/Li composite electrode as a negative electrode, a positive electrode, a diaphragm and an electrolyte solution, and the preparation method of the positive electrode comprises the following steps:
(1) lithium iron phosphate (LiFePO)4)、Uniformly grinding conductive carbon black (Super P) and polyvinylidene fluoride (PVDF) according to a mass ratio of 80:10:10, and stirring for 1h at a speed of 600rpm in a stirrer by taking N-methylpyrrolidone (NMP) as a dispersing agent to obtain slurry;
(2) and uniformly coating the obtained slurry on a carbon-containing aluminum foil of a current collector, and then drying for 24 hours in a vacuum box at the temperature of 120 ℃ to obtain the cathode.
Still further, the separator is Celgard 2400.
Still further, the electrolyte solution includes 1mol/L lithium hexafluorophosphate (LiPF)6) The electrolyte solvent is a mixed solution of an Ethyl Carbonate (EC) electrolyte and a diethyl carbonate (DEC) electrolyte.
In fig. 1, (a) shows a lithium ion distribution of an unmodified lithium plate, and (b) shows a lithium ion distribution of a lithium-philic composite electrode according to an embodiment of the present invention. The smaller interfacial contact angle in graph (b) indicates that the lithium ions can be uniformly distributed on the Ag/Li composite electrode, which is beneficial to uniform deposition of lithium during subsequent battery cycling.
Fig. 2 shows that the lithium battery provided in example 1 performs constant current charging and discharging at a rate of 1C, and the cut-off voltage is 2.2-4.2V. The cycle can be repeated for 200 times, and the average coulomb efficiency is 99.9 percent.
Example 2:
in one aspect, the present embodiment provides a method for preparing a lithium-philic negative electrode, including the following steps:
(1) mixing AgNO3Dissolving in organic solvent mixed solution containing N-methylpyrrolidone (NMP) to obtain AgNO3A solution, said organic solvent further comprising Ethylene Carbonate (EC), said N-methylpyrrolidone (NMP) volume fraction being 40%, wherein AgNO3The concentration of the solution is 1 mol/L;
(2) preparing a lithium-philic negative electrode: mixing the AgNO3Dripping 50 mu L of solution on the surface of the lithium sheet for reaction to generate Ag/Li alloy and LiNO3The Ag/Li alloy covers the surface of the lithium sheet to form a lithium-philic Ag/Li composite electrode, the solvent is evaporated, and the LiNO is3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode.
On the other hand, the embodiment also provides a lithium-philic negative electrode which is prepared by adopting the preparation method of the lithium-philic negative electrode.
The embodiment also provides a lithium battery, wherein the lithium battery comprises the lithium-philic Ag/Li composite electrode as a negative electrode, a positive electrode, a diaphragm and an electrolyte solution, and the preparation method of the positive electrode comprises the following steps:
(1) lithium titanate (Li)4Ti5O12) Uniformly grinding conductive carbon black (Super P) and polyvinylidene fluoride (PVDF) according to a mass ratio of 80:10:10, stirring for 30min at a speed of 500rpm in a stirrer by taking N-methylpyrrolidone (NMP) as a dispersing agent, and obtaining slurry;
(2) the obtained slurry was uniformly coated on a current collector, and then dried in a vacuum oven at 80 ℃ for 24 hours to serve as a positive electrode.
Said still further, said separator is Celgard 2400.
Still further, the electrolyte solution includes 1mol/L lithium hexafluorophosphate (LiPF)6) The electrolyte solvent is a mixed solution of an Ethyl Carbonate (EC) electrolyte and a diethyl carbonate (DEC) electrolyte.
Fig. 3 shows that the lithium battery provided by this embodiment performs constant current charging and discharging at a rate of 1C, and can be cycled for more than 800 times.
Example 3:
in one aspect, the present embodiment provides a method for preparing a lithium-philic negative electrode, including the following steps:
(1) mixing AgNO3Dissolving in organic solvent mixed solution containing N-methylpyrrolidone (NMP) to obtain AgNO3A solution, said organic solvent further comprising dimethyl carbonate (DMC), said N-methylpyrrolidone (NMP) having a volume fraction of 5%, wherein AgNO3The concentration of the solution is 0.05 mol/L;
(2) preparing a lithium-philic negative electrode: taking the AgNO3Dripping 100 mu L of the solution on the surface of a lithium sheet for reaction to generate Ag and LiNO3The Ag covers the surface of the lithium sheet to form a lithium-philic Ag/Li composite electrode, and the solution is evaporatedAgent of said LiNO3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode.
On the other hand, the embodiment also provides a lithium-philic negative electrode which is prepared by adopting the preparation method of the lithium-philic negative electrode.
The invention also provides a lithium battery, and the preparation method of the lithium battery comprises the following steps: assembling the obtained lithium-philic Ag/Li composite electrode into a 2032 type symmetrical battery, wherein the symmetrical battery refers to a symmetrical battery with a negative electrode and a positive electrode both of which are lithium-philic Ag/Li composite electrodes, adding 50 microliter of ethylene glycol dimethyl ether (DME) and 1, 3-Dioxolane (DOL) into electrolyte, and the volume ratio of the ethylene glycol dimethyl ether (DME) to the 1, 3-Dioxolane (DOL) is 1:1, electrolyte salt is 1mol/L lithium bistrifluoromethanesulfonylimide (LiTFSI).
The fixed charge-discharge capacity per cycle is 1mAh/cm2Current density of 1mA/cm2The charge and discharge test of the symmetrical battery under the above conditions can stably circulate for 1000 circles, the average voltage polarization is 45mV, and the overpotential is very stable, as shown in FIG. 4.
Example 4
On the basis of the above example 3, under the same test conditions, LiNO was produced3After washing, the symmetrical cell was able to cycle relatively stably for 500 cycles with a voltage polarization of 60mV, as shown in FIG. 5. The voltage fluctuation and the voltage polarization value were slightly larger than those of the group retaining lithium nitrate. The experiment proves that the silver-lithium composite electrode and the generated lithium nitrate act together to stabilize the metal lithium electrode.
Example 5
In one aspect, the present embodiment provides a method for preparing a lithium-philic negative electrode, including the following steps:
(1) mixing Al (NO)3)3Dissolving in organic solvent mixture containing dimethyl formamide (DMF) to obtain Al (NO)3)3A solution, the organic solvent further comprising Ethyl Methyl Carbonate (EMC), 30% by volume Dimethylformamide (DMF), Al (NO)3)3The concentration of the solution is 0.2 mol/L;
(2) preparation of lithium-philic negative electrode: mixing the above Al (NO)3)3Dripping 100 mu L of the solution on the surface of a lithium sheet for reaction to generate Al and LiNO3Covering Al on the surface of the lithium sheet to form a lithium-philic Al/Li composite electrode, evaporating the solvent, and obtaining LiNO3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode.
On the other hand, the embodiment also provides a lithium-philic negative electrode which is prepared by adopting the preparation method of the lithium-philic negative electrode.
The embodiment also provides a lithium battery, wherein the lithium battery comprises the lithium-philic Al/Li composite electrode as a negative electrode, a positive electrode, a diaphragm and an electrolyte solution, and the preparation method of the positive electrode comprises the following steps:
(1) uniformly grinding lithium iron phosphate (LiFePO4), conductive carbon black (Super P) and polyvinylidene fluoride (PVDF) according to the mass ratio of 80:10:10, and stirring for 1h at the speed of 600rpm in a stirrer by taking N-methylpyrrolidone (NMP) as a dispersing agent to obtain slurry;
(2) and uniformly coating the obtained slurry on a carbon-containing aluminum foil of a current collector, and then drying for 24 hours in a vacuum box at the temperature of 120 ℃ to obtain the cathode.
Still further, the separator is Celgard 2400.
Further, the electrolyte solution includes an electrolyte salt of 1mol/L lithium hexafluorophosphate (LiPF6) and an electrolyte solvent, which is a mixed solution of an Ethyl Carbonate (EC) electrolyte and a diethyl carbonate (DEC) electrolyte.
Fig. 6 shows that the lithium battery provided in example 1 is charged and discharged at a constant current with a rate of 0.5C, and the cut-off voltage is 2.2-4.2V. The cycle can be repeated for 400 times, and the average coulomb efficiency is 99.8 percent.
Example 6
In one aspect, the present embodiment provides a method for preparing a lithium-philic negative electrode, including the following steps:
(1) sn (NO)3)4Dissolving in acetonitrile (C)2H3N) into Sn (NO) in an organic solvent mixture3)4A solution, the organic solvent further comprising ethylene glycol dimethyl ether(DME) and 1, 3-Dioxolane (DOL), the acetonitrile (C)2H3N) volume fraction of 10%, wherein Sn (NO)3)4The concentration of the solution is 0.15 mol/L;
(2) preparing a lithium-philic negative electrode: taking the above Sn (NO)3)4Dripping 150 mu L of the solution on the surface of the lithium sheet for reaction to generate Sn and LiNO3The Sn covers the surface of the lithium sheet to form a lithium-philic Sn/Li composite electrode, the solvent is evaporated, and the LiNO is3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode.
On the other hand, the embodiment also provides a lithium-philic negative electrode which is prepared by adopting the preparation method of the lithium-philic negative electrode.
The invention also provides a lithium battery, and the preparation method of the lithium battery comprises the following steps: assembling the obtained lithium-philic Sn/Li composite electrode into a 2032 type symmetrical battery, wherein the symmetrical battery refers to a symmetrical battery with a negative electrode and a positive electrode both of which are lithium-philic Sn/Li composite electrodes, adding 50 microliter of ethylene glycol dimethyl ether (DME) and 1, 3-Dioxolane (DOL) into electrolyte, and the volume ratio of the ethylene glycol dimethyl ether (DME) to the 1, 3-Dioxolane (DOL) is 1:1, electrolyte salt is 1mol/L lithium bistrifluoromethanesulfonylimide (LiTFSI).
The fixed charge-discharge capacity per cycle is 1mAh/cm2The current density is 2mA/cm2The symmetrical battery is subjected to charge and discharge tests under the conditions, can stably circulate for 400 circles, has an average voltage polarization of 55mV and has very stable overpotential.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A method for preparing a lithium-philic negative electrode, comprising the steps of:
(1) will MXNO3Dissolving in organic solvent mixture to obtain MxNO3A solution, wherein M is a metal with lower metal activity than Li, and the organic solvent mixed solution contains a nitrogen-containing organic solvent;
the nitrogen-containing organic solvent is N-methylpyrrolidone (NMP), Dimethylformamide (DMF) and acetonitrile (C)2H3N) one or more of;
the organic solvent mixed solution also comprises one or more of dimethyl carbonate (DMC), Ethyl Methyl Carbonate (EMC), Diethyl Carbonate (DC), Ethylene Carbonate (EC), diethyl carbonate (DEC), Polycarbonate (PC), Tetrahydrofuran (THF), tetraethylene glycol dimethyl ether, 1, 3-Dioxolane (DOL) and ethylene glycol dimethyl ether (DME);
(2) preparing a lithium-philic negative electrode: mixing the above MxNO3The solution is dripped on the surface of a lithium sheet to react to generate M or M/Li alloy and LiNO3Covering the surface of the lithium sheet with the M or M/Li alloy to form a lithium-philic M/Li composite electrode, evaporating the solvent, and obtaining LiNO3Depositing on the surface of the composite electrode to obtain the lithium-philic negative electrode;
the M isxNO3The concentration range of (A) is 0.01 mol/L-1 mol/L;
MxNO3the dropping amount of (A) is 50 to 150. mu.L.
2. The method for preparing the lithium-philic negative electrode as claimed In claim 1, wherein M is one or more of Ag, Cu, Al, Zn, Fe, Co, Ni, Sn, Au, Pt and In.
3. The method for producing a lithium-philic negative electrode as claimed in claim 2, wherein M is Ag or Al or Sn.
4. A lithium-philic negative electrode, characterized in that it is produced by a method of producing a lithium-philic negative electrode according to any one of claims 1 to 3.
5. A lithium battery, characterized in that it comprises a lithium battery as claimed in claim 4The anode adopts lithium iron phosphate (LiFePO)4) Lithium manganate (LiMn)2O4) Lithium titanate (Li)4Ti5O12) Lithium nickelate (LiNiO)2) Nickel cobalt binary (LiNiCoO)2) Lithium cobaltate (LiCoO)2) Nickel cobalt manganese ternary (NCM), elemental sulfur, and organic sulfide or carbon sulfide.
6. A lithium battery, characterized in that it is a symmetrical battery comprising a lithium-philic negative electrode as claimed in claim 4, the positive and negative electrodes of the symmetrical battery being identical.
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| CN112786842A (en) * | 2021-01-29 | 2021-05-11 | 山东威固新能源科技有限公司 | Alkali metal cathode containing artificial solid electrolyte interface layer and preparation method and application thereof |
| CN113675469A (en) * | 2021-07-19 | 2021-11-19 | 华南理工大学 | Carbonate electrolyte containing lithium nitrate, preparation method thereof and application thereof in lithium metal battery |
| CN113555529B (en) * | 2021-07-21 | 2022-09-13 | 陕西科技大学 | Heusler alloy Fe for lithium electrode 2 CoAl/C self-supporting composite material and preparation method and application thereof |
| CN116231085B (en) * | 2023-05-05 | 2023-09-22 | 宁德时代新能源科技股份有限公司 | Electrolyte, lithium metal battery, preparation method of lithium metal battery and power utilization device |
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