CN115806319A - Layered high-entropy oxide, preparation method and application thereof - Google Patents
Layered high-entropy oxide, preparation method and application thereof Download PDFInfo
- Publication number
- CN115806319A CN115806319A CN202211634661.0A CN202211634661A CN115806319A CN 115806319 A CN115806319 A CN 115806319A CN 202211634661 A CN202211634661 A CN 202211634661A CN 115806319 A CN115806319 A CN 115806319A
- Authority
- CN
- China
- Prior art keywords
- source
- equal
- oxide
- layered high
- ltoreq
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
Abstract
The invention provides a compound shown as the formula NaMn x Fe y Co z Ni a Ti b M c O 2 The layered high entropy oxides shown. The application also provides a preparation method of the layered high-entropy oxide, which comprises the following steps: a) Mixing a first Na source, a Mn source, a Fe source, a Co source, a Ni source, a Ti source and an M source according to the element molar ratio of the layered high-entropy oxide, and performing ball milling to obtain a mixture; b) And adding a second Na source after the mixture is calcined for the first time, and calcining for the second time after ball milling to obtain the layered high-entropy oxide. The preparation method of the layered high-entropy oxide is simple, does not need to adopt a complex pretreatment process, and is realized by simple and easy material mixing,After the calcination process, the material can be prepared; the prepared layered high-entropy oxide sodium ion battery cathode material has high air stability, and has the characteristics of high capacity, high stability and the like.
Description
Technical Field
The invention relates to the technical field of material preparation and electrochemistry, in particular to a layered high-entropy oxide, a preparation method and application thereof.
Background
The demand of the current society on an energy storage system is higher and higher, higher power density and energy density are required, and meanwhile, due to the huge use demand, the demand is hopeful to be lower in price. In recent years, with the rapid development of lithium ion batteries, corresponding lithium resources become short supply and short demand, which leads to the sudden price rise of lithium ore resources such as lithium carbonate and the like, further promotes the price rise of the batteries, and reduces the cost performance of the lithium ion batteries. In order to further promote the use of electric power energy and complete the national strategy of carbon peaking and carbon neutralization, people need to find a substitute of a lithium ion battery. The sodium ion battery has a charge-discharge mechanism similar to that of the lithium ion battery, the corresponding process flow of the lithium ion battery can be compatible in the sodium ion battery, and meanwhile, the material of the sodium ion battery is convenient and easy to prepare, and can be more suitable for multiplying power charge-discharge, low-temperature charge-discharge and the like.
However, the energy density of the sodium ion battery is still lower compared with that of the lithium ion battery, and the key point is that the voltage of the positive electrode material of the sodium ion battery is relatively low, and the specific capacity is also lower. At present, the most mature technical route of the positive electrode material of the sodium-ion battery is a layered oxide material Na x TMO 2 (0<x<1,tm = ni, fe, mn, co, V, etc.), which can be classified into P2, P3, O3 types according to different coordination environments of sodium ions in the material and the arrangement order of oxygen atoms; they can be further classified into a single-component material and a multi-component material according to the type of TM metal. The unitary material generally has the defects of complex phase change, high-voltage atom migration and the like, and cannot meet the use requirement of the positive electrode material of the sodium-ion battery. Combines the characteristics of various transition metal elements, makes up for deficiencies of the transition metal elements, and is an effective method for rapidly improving the comprehensive performance of the material.
By mixing a plurality of metal elements and according to a Gibbs-Helmholtz formula, the entropy of the components is increased, so that the Delta G of the system is effectively reduced, the stability of a crystal structure is further increased, and better electrochemical performance can be expected by improving the stability of the structure. This method is effective, and CN114204005A also describes a method for preparing high-entropy oxide, but its component structure is too complex, preparation process is tedious, and the contribution of each component in electrochemical performance cannot be effectively understood.
Disclosure of Invention
The invention aims to provide a layered high-entropy oxide, which solves the problem of low energy density of a positive electrode of a sodium-ion battery.
In view of the above, the present application provides a layered high-entropy oxide represented by formula (I),
NaMn x Fe y Co z Ni a Ti b M c O 2 (Ⅰ)，
wherein x is more than or equal to 0.02 and less than or equal to 0.4, y is more than or equal to 0.05 and less than or equal to 0.3, z is more than or equal to 0.02 and less than or equal to 0.3, a is more than or equal to 0.05 and less than or equal to 0.4, b is more than or equal to 0.02 and less than or equal to 0.2, c is more than or equal to 0.02 and less than or equal to 0.2, x +, y +, z, a +, b +, c =1;
m is one or more selected from Cr, cu, zn, mg, ca, mo, V and rare earth elements.
Preferably, the layered high-entropy oxide is an O3 phase, a P2 phase or a P3 phase.
Preferably, the layered high-entropy oxide is an O3 phase.
Preferably, x is more than or equal to 0.1 and less than or equal to 0.3, y is more than or equal to 0.1 and less than or equal to 0.25, z is more than or equal to 0.2 and less than or equal to 0.25, a is more than or equal to 0.2 and less than or equal to 0.3, b is more than or equal to 0.05 and less than or equal to 0.2, and c is more than or equal to 0.05 and less than or equal to 0.15.
The application also provides a preparation method of the layered high-entropy oxide, which comprises the following steps:
a) Mixing a first Na source, a Mn source, a Fe source, a Co source, a Ni source, a Ti source and an M source according to the element molar ratio of the layered high-entropy oxide, and performing ball milling to obtain a mixture;
b) Adding a second Na source after the mixture is calcined for the first time, and calcining for the second time after ball milling to obtain a layered high-entropy oxide;
the molar ratio of the first Na source to the second Na source is (2-10): 1.
preferably, in the step A), the ball-milling ball-material ratio is (8-15) to 1, and the ball-milling time is 5-10 h; in the step B), the ball milling time is 2-5 h.
Preferably, the first Na source and the second Na source are independently selected from one or more of sodium carbonate, sodium hydroxide and sodium acetate, the manganese source is selected from one or more of manganese sesquioxide, manganese oxide, manganese tetraoxide, manganese carbonate and manganese oxalate, the iron source is selected from one or more of iron sesquioxide, ferrous oxide and iron hydroxide, the cobalt source is selected from one or more of cobalt oxide, cobalt carbonate and cobalt acetate, the nickel source is selected from one or more of nickel oxide, nickel acetate and nickel nitrate, and the titanium source is selected from titanium dioxide.
Preferably, the temperature of the first calcination is 500-1100 ℃, the heating rate is 0.5-20 ℃/min, and the time is 5-24 h; the temperature of the second calcination is 700-1500 ℃, the heating rate is 0.5-20 ℃/min, and the time is 4-24 h.
Preferably, the second calcination is carried out in an atmosphere containing oxygen.
The application also provides a sodium ion battery which comprises a positive electrode and a negative electrode, wherein the positive electrode is made of the layered high-entropy oxide or the layered high-entropy oxide prepared by the preparation method.
The application provides a layered high-entropy oxide having the formula NaMn x Fe y Co z Ni a Ti b M c O 2 The high-entropy layered oxide material is obtained by selecting more than five transition metal sources, has higher phase stability, can allow more sodium ions to be removed without influencing the crystal structure of the material, thereby improving the discharge performance of the material under high voltage and improving the cycle stability of a battery; furthermore, the stability of the main body structure is further ensured by introducing non-electrochemical active elements such as M, ti and the like.
The application also provides a preparation method of the layered high-entropy oxide, which ensures that the valence state of the active element is in a high valence state by introducing two steps of high-temperature calcination and gas introduction, reduces the defects of phase segregation and the like in the material sintering process, and further improves the electrochemical performance of the material.
Drawings
FIG. 1 is an SEM photograph of layered high entropy oxides prepared in examples 1 and 2 of this invention; the left side is the SEM photograph corresponding to example 1, and the right side is the SEM photograph corresponding to example 2;
fig. 2 is a graph showing the cycle performance of the layered high-entropy oxide prepared in examples 1 and 2 according to the present invention.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The application provides a layered high-entropy oxide and a preparation method thereof, the layered high-entropy oxide can solve the problem of low energy density of a positive electrode of a sodium-ion battery, and the preparation method is simple, convenient and effective. In particular, the application provides a layered high-entropy oxide shown as a chemical formula (I),
NaMn x Fe y Co z Ni a Ti b M c O 2 (Ⅰ)，
wherein x is more than or equal to 0.02 and less than or equal to 0.4, y is more than or equal to 0.05 and less than or equal to 0.3, z is more than or equal to 0.02 and less than or equal to 0.3, a is more than or equal to 0.05 and less than or equal to 0.4, b is more than or equal to 0.02 and less than or equal to 0.2, c is more than or equal to 0.02 and less than or equal to 0.2, x +, y +, z, a +, b +, c =1;
m is one or more selected from Cr, cu, zn, mg, ca, mo, V and rare earth elements.
In the present application, the layered high-entropy oxide is an O3 phase, a P2 phase or a P3 phase, and more specifically, the layered high-entropy oxide is an O3 phase.
Specifically, x is more than or equal to 0.1 and less than or equal to 0.3, y is more than or equal to 0.1 and less than or equal to 0.25, z is more than or equal to 0.2 and less than or equal to 0.25, a is more than or equal to 0.2 and less than or equal to 0.3, b is more than or equal to 0.05 and less than or equal to 0.2, and c is more than or equal to 0.05 and less than or equal to 0.15.
The application also provides a preparation method of the layered high-entropy oxide, which comprises the following steps:
mixing a first Na source, a Mn source, a Fe source, a Co source, a Ni source, a Ti source and an M source according to the element molar ratio of the layered high-entropy oxide, and performing ball milling to obtain a mixture;
adding a second Na source after the mixture is calcined for the first time, and calcining for the second time after ball milling to obtain a layered high-entropy oxide;
the molar ratio of the first Na source to the second Na source is (2-10): 1.
in the preparation method of the high-entropy layered oxide, the first Na source and the second Na source are independently selected from one or more of sodium carbonate, sodium hydroxide and sodium acetate, the manganese source is selected from one or more of manganous oxide, manganese oxide, manganous oxide, manganese carbonate and manganese oxalate, the iron source is selected from one or more of ferric oxide, ferrous oxide and ferric hydroxide, the cobalt source is selected from one or more of cobalt oxide, cobalt carbonate and cobalt acetate, the nickel source is selected from one or more of nickel oxide, nickel acetate and nickel nitrate, and the titanium source is selected from titanium dioxide. More specifically, the first and second Na sources are selected from sodium carbonate, the manganese source is selected from manganese carbonate, the iron source is selected from iron sulfate, the cobalt source is selected from cobalt acetate, and the nickel source is selected from nickel sulfate.
In the preparation process, the first ball milling process is carried out, the ball-material ratio is (8-15) to 1, the rotating speed is 200-500 r/min, and the ball milling time is 5-10 h; in the second ball milling process, the ball milling time is 2-5 h. The temperature of the first calcination is 500-1100 ℃, the heating rate is 0.5-20 ℃/min, the time is 5-24 h, the temperature of the second calcination is 700-1500 ℃, the heating rate is 0.5-20 ℃/min, and the time is 4-24 h. Through twice calcination, the valence state of the active element is ensured to be in a high valence state, the defects of phase segregation and the like in the sintering process of the layered high-entropy oxide are reduced, and the electrochemical performance of the layered high-entropy oxide is further improved.
For further understanding of the present invention, the following examples are given to illustrate the layered high-entropy oxide provided by the present invention, its preparation method and its application, and the scope of the present invention is not limited by the following examples.
Example 1
(1) According to the element mole ratio of 0.8:0.198:0.198:0.198:0.198:0.198: respectively weighing a Na source, a Mn source, a Fe source, a Co source, a Ni source, a Ti source and a lanthanum source according to the proportion of 0.01, mixing, putting into a ball mill, grinding and crushing, wherein the sodium source is sodium carbonate, the manganese source is manganese sulfate, the iron source is ferric sulfate, the cobalt source is cobalt acetate, the nickel source is nickel sulfate, the titanium source is titanium dioxide, and the lanthanum source is lanthanum nitrate; the ball-material ratio is 10;
(2) Feeding the uniformly mixed material in the last step into a high-temperature calcining furnace for calcining, wherein the calcining temperature is 800 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 5h;
(3) After the temperature is reduced to the room temperature, taking out the materials, then adding sodium carbonate again, wherein the adding amount of the sodium carbonate is 20 percent of the total sodium carbonate required amount, continuing ball milling, the rotating speed of the ball milling is 300r/min, and the ball milling time is 2h;
(4) Continuously introducing air into the uniformly mixed material in the last step in a high-temperature furnace for calcination, wherein the calcination temperature is 1100 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 10h; then obtaining the NaMn with the chemical formula 0.198 Fe 0.198 Co 0.198 Ni 0.198 Ti 0.198 La 0.01 O 2 The layered high entropy oxide is shown.
Example 2
The preparation method is the same as that of the example 1, and only differs from the following steps: the manganese source is changed into manganese oxalate with the same amount of substance. The method comprises the following specific steps:
(1) According to the element mole ratio of 0.8:0.198:0.198:0.198:0.198:0.198: respectively weighing a Na source, a Mn source, a Fe source, a Co source, a Ni source, a Ti source and a lanthanum source according to the proportion of 0.01, mixing, putting into a ball mill, grinding and crushing, wherein the sodium source is sodium carbonate, the manganese source is manganese oxalate, the iron source is ferric sulfate, the cobalt source is cobalt acetate, the nickel source is nickel sulfate, the titanium source is titanium dioxide, and the lanthanum source is lanthanum nitrate; the ball-material ratio is 10;
(2) Feeding the uniformly mixed material in the last step into a high-temperature calcining furnace for calcining, wherein the calcining temperature is 800 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 5h;
(3) After the temperature is reduced to room temperature, taking out the materials, then adding sodium carbonate again, wherein the addition amount of the sodium carbonate is 20 percent of the total required amount of sodium carbonate, continuing ball milling, the rotating speed is 300r/min, and the ball milling time is 2 hours;
(4) Continuously introducing air into the uniformly mixed material in the last step in a high-temperature furnace for calcination, wherein the calcination temperature is 1100 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 10h; then obtaining the NaMn with the chemical formula 0.198 Fe 0.198 Co 0.198 Ni 0.198 Ti 0.198 La 0.01 O 2 The layered high entropy oxide is shown.
Comparative example 1
The method of preparing the positive electrode material in comparative example 1 is the same as in example 1 except that: in comparative example 1, lanthanum nitrate is not added, and the chemical formula of the prepared high-entropy alloy layered oxide is NaMn 0.2 Fe 0.2 Co 0.2 Ni 0.2 Ti 0.2 O 2 (ii) a The method comprises the following specific steps:
(1) According to the element mole ratio of 0.8:0.2:0.2:0.2:0.2: respectively weighing a Na source, a Mn source, a Fe source, a Co source, a Ni source and a Ti source according to the proportion of 0.2, mixing, putting into a ball mill, grinding and crushing, wherein the sodium source is sodium carbonate, the manganese source is manganese sulfate, the iron source is ferric sulfate, the cobalt source is cobalt acetate, the nickel source is nickel sulfate, and the titanium source is titanium dioxide; the ball-material ratio is 10;
(2) Feeding the uniformly mixed material in the last step into a high-temperature calcining furnace for calcining, wherein the calcining temperature is 800 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 5h;
(3) After the temperature is reduced to room temperature, taking out the materials, then adding sodium carbonate again, wherein the addition amount of the sodium carbonate is 20 percent of the total required amount of sodium carbonate, continuing ball milling, the rotating speed is 300r/min, and the ball milling time is 2 hours;
(4) Continuously introducing air into the uniformly mixed material in the last step in a high-temperature furnace for calcination, wherein the calcination temperature is 1100 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 10h; then obtaining the NaMn with the chemical formula 0.2 Fe 0.2 Co 0.2 Ni 0.2 Ti 0.2 O 2 The layered high entropy oxide is shown.
Comparative example 2
The method of preparing the cathode material in comparative example 2 is the same as that of example 1 except that: in comparative example 2, titanium dioxide is not added, and the chemical formula of the prepared high-entropy alloy layered oxide is NaMn 0.248 Fe 0.248 Co 0.247 Ni 0.247 La 0.01 O 2 (ii) a The method comprises the following specific steps:
(1) According to the element mole ratio of 0.8:0.248:0.248:0.247:0.247: respectively weighing a Na source, a Mn source, a Fe source, a Co source, a Ni source and a lanthanum source according to the proportion of 0.01, mixing, putting into a ball mill, grinding and crushing, wherein the sodium source is sodium carbonate, the manganese source is manganese sulfate, the iron source is ferric sulfate, the cobalt source is cobalt acetate, the nickel source is nickel sulfate, the titanium source is titanium dioxide, and the lanthanum source is lanthanum nitrate; the ball-material ratio is 10;
(2) Feeding the uniformly mixed material in the last step into a high-temperature calcining furnace for calcining, wherein the calcining temperature is 800 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 5h;
(3) After the temperature is reduced to the room temperature, taking out the materials, then adding sodium carbonate again, wherein the adding amount of the sodium carbonate is 20 percent of the total sodium carbonate required amount, continuing ball milling, the rotating speed of the ball milling is 300r/min, and the ball milling time is 2h;
(4) Continuously introducing air into the uniformly mixed material in the last step in a high-temperature furnace for calcination, wherein the calcination temperature is 1100 ℃, the heating rate is 10 ℃/min, and the heat preservation time is 10h; then obtaining the NaMn with the chemical formula 0.248 Fe 0.248 Co 0.247 Ni 0.247 La 0.01 O 2 The layered high entropy oxide is shown.
As can be seen from fig. 1, when manganese sulfate is used as the manganese source, the surface structure of the material prepared by sintering is relatively smooth, and when manganese oxalate is replaced, the surface of the material is rough, which may be related to the generation of more gas during the sintering process of manganese oxalate.
The materials prepared in the examples were assembled into button cells, and the two positive electrode materials were respectively prepared according to the following ratio of 8:1:1, mixing and stirring with Super P and PVDF, adding an NMP dispersing agent for uniform mixing, coating on the surface of an aluminum foil for drying, and preparing a corresponding positive pole piece after rolling and cutting; the button cell uses a metal sodium sheet as a negative electrode, a Whatman brand glass fiber diaphragm as a test diaphragm, EC/DEC mixed solution containing 1M sodium hexafluorophosphate is used as electrolyte of the cell, the button cell is assembled, the performance of the button cell is detected, and the detection result is shown in Table 1;
table 1 table of performance data for layered high entropy oxide assembled batteries prepared in example 1 and example 2
Comparing the data of example 1 and example 2, it can be seen that NaMn prepared by sintering manganese sulfate as manganese source x Fe y Co z Ni a Ti b M c O 2 Has higher first-circle discharge capacity, still has 84.2 percent capacity retention rate after 200 times of charge-discharge circulation under the current density of 0.2C, and NaMn prepared after manganese sulfate is changed into manganese oxalate x Fe y Co z Ni a Ti b M c O 2 The first-turn discharge capacity is slightly lower than that of example 1 due to the loose structure, but the first-turn discharge capacity has higher capacity retention rate and higher coulombic efficiency under the same current density, and the difference of the electrochemical performance is due to a slight difference in morphology. Compared with the data of the comparative example and the embodiment, the initial discharge specific capacity of the material is almost unchanged after the M component in the high-entropy alloy layered oxide is removed, but the cycle stability and the average coulombic efficiency are obviously reduced, mainly because the structure of the material can be stabilized by adding the M, the capacity loss caused by phase change in the charging and discharging process is reduced; meanwhile, the elimination of Ti element increases the initial discharge capacity of the material, but takes the loss of the cycle stability as the cost.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A layered high-entropy oxide of formula (I),
NaMn x Fe y Co z Ni a Ti b M c O 2 (Ⅰ)，
wherein x is more than or equal to 0.02 and less than or equal to 0.4, y is more than or equal to 0.05 and less than or equal to 0.3, z is more than or equal to 0.02 and less than or equal to 0.3, a is more than or equal to 0.05 and less than or equal to 0.4, b is more than or equal to 0.02 and less than or equal to 0.2, c is more than or equal to 0.02 and less than or equal to 0.2, x + y + z + b + c =1;
m is one or more selected from Cr, cu, zn, mg, ca, mo, V and rare earth elements.
2. A layered high entropy oxide according to claim 1, characterized in that the layered high entropy oxide is an O3 phase, a P2 phase or a P3 phase.
3. A layered high-entropy oxide according to claim 1 or 2, characterized in that it is an O3 phase.
4. A layered high entropy oxide according to claim 1, characterized in that 0.1. Ltoreq. X.ltoreq.0.3, 0.1. Ltoreq. Y.ltoreq.0.25, 0.2. Ltoreq. Z.ltoreq.0.25, 0.2. Ltoreq. A.ltoreq.0.3, 0.05. Ltoreq. B.ltoreq.0.2, 0.05. Ltoreq. C.ltoreq.0.15.
5. A process for the preparation of a layered high entropy oxide according to claim 1, comprising the steps of:
a) Mixing a first Na source, a Mn source, a Fe source, a Co source, a Ni source, a Ti source and an M source according to the element molar ratio of the layered high-entropy oxide, and performing ball milling to obtain a mixture;
b) Adding a second Na source after the mixture is calcined for the first time, and calcining for the second time after ball milling to obtain a layered high-entropy oxide;
the molar ratio of the first Na source to the second Na source is (2-10): 1.
6. the preparation method of claim 5, wherein in the step A), the ball-milling ball-to-material ratio is (8-15) to 1, and the ball-milling time is 5-10 h; in the step B), the ball milling time is 2-5 h.
7. The method according to claim 5, wherein the first Na source and the second Na source are independently selected from one or more of sodium carbonate, sodium hydroxide and sodium acetate, the manganese source is selected from one or more of manganous oxide, manganese carbonate and manganese oxalate, the iron source is selected from one or more of ferric oxide, ferrous oxide and ferric hydroxide, the cobalt source is selected from one or more of cobalt oxide, cobalt carbonate and cobalt acetate, the nickel source is selected from one or more of nickel oxide, nickel acetate and nickel nitrate, and the titanium source is selected from titanium dioxide.
8. The preparation method according to claim 5, characterized in that the temperature of the first calcination is 500-1100 ℃, the heating rate is 0.5-20 ℃/min, and the time is 5-24 h; the temperature of the second calcination is 700-1500 ℃, the heating rate is 0.5-20 ℃/min, and the time is 4-24 h.
9. The method according to claim 5, wherein the second calcination is performed in an atmosphere containing oxygen.
10. A sodium ion battery comprises a positive electrode and a negative electrode, and is characterized in that the material of the positive electrode is the layered high-entropy oxide of any one of claims 1 to 4 or the layered high-entropy oxide prepared by the preparation method of any one of claims 5 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211634661.0A CN115806319A (en) | 2022-12-19 | 2022-12-19 | Layered high-entropy oxide, preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211634661.0A CN115806319A (en) | 2022-12-19 | 2022-12-19 | Layered high-entropy oxide, preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115806319A true CN115806319A (en) | 2023-03-17 |
Family
ID=85486152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211634661.0A Withdrawn CN115806319A (en) | 2022-12-19 | 2022-12-19 | Layered high-entropy oxide, preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115806319A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117199339A (en) * | 2023-11-06 | 2023-12-08 | 山东海化集团有限公司 | Sodium ion battery positive electrode material with nitrogen element stable high entropy oxide oxygen vacancy and preparation method thereof |
-
2022
- 2022-12-19 CN CN202211634661.0A patent/CN115806319A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117199339A (en) * | 2023-11-06 | 2023-12-08 | 山东海化集团有限公司 | Sodium ion battery positive electrode material with nitrogen element stable high entropy oxide oxygen vacancy and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109659542B (en) | High-voltage lithium cobalt oxide cathode material with core-shell structure and preparation method thereof | |
| CN113651373A (en) | Anode material with uniform porous structure and preparation method thereof | |
| CN107591519A (en) | Modified lithium nickel cobalt manganese positive electrode material and preparation method thereof | |
| CN111106331B (en) | Layered-spinel phase composite positive electrode material and preparation method thereof | |
| CN108807860B (en) | Cathode additive, preparation method thereof, cathode sheet and lithium battery | |
| CN114843498A (en) | Sodium-containing oxide positive electrode material, preparation method and application thereof, positive electrode plate and application thereof | |
| CN110391407B (en) | Power battery positive electrode material with core-shell structure and preparation method and application thereof | |
| CN113471411A (en) | Composite coated positive electrode material and preparation method thereof | |
| CN114229918B (en) | Method for regulating phase proportion in positive electrode material of sodium-ion battery, preparation and application thereof | |
| CN114843469B (en) | MgFe 2 O 4 Modified P2/O3 type nickel-based layered sodium ion battery positive electrode material and preparation method thereof | |
| CN108807920B (en) | LASO-coated octahedral-structure lithium nickel manganese oxide composite material and preparation method thereof | |
| CN115911610A (en) | Anode lithium supplement material, preparation method and application thereof | |
| CN113603146A (en) | Iron-manganese-based cathode material and preparation method and application thereof | |
| CN115395007A (en) | Layered-spinel composite phase monocrystal lithium-rich manganese-based positive electrode material and application thereof | |
| CN113066980B (en) | Method for preparing phosphomolybdic acid modified high-nickel single crystal positive electrode material | |
| CN115806319A (en) | Layered high-entropy oxide, preparation method and application thereof | |
| CN117219772A (en) | Sodium ion battery positive electrode material with low-nickel shell structure and preparation method thereof | |
| CN107834054B (en) | Preparation method of lithium nickel manganese oxide-graphene composite material for lithium ion battery | |
| CN113683122B (en) | Iron-manganese-based positive electrode material, and preparation method and application thereof | |
| CN111320214B (en) | Modified nickel cobalt lithium manganate ternary cathode material and preparation method and application thereof | |
| CN114583151A (en) | Activation method of lithium-rich manganese-based positive electrode material | |
| CN113903900A (en) | Modified lithium nickel manganese oxide positive electrode material, preparation method thereof and lithium ion battery positive electrode plate | |
| CN114005955A (en) | Positive pole piece and preparation method and application thereof | |
| CN109616642B (en) | Composite positive electrode material, preparation method thereof and lithium ion battery | |
| CN116199278B (en) | Preparation method of ternary positive electrode material of lithium battery |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230317 |
|
| WW01 | Invention patent application withdrawn after publication |