CN110635111A - By TiO2Preparation method of lithium-sulfur battery as additive - Google Patents

By TiO2Preparation method of lithium-sulfur battery as additive Download PDF

Info

Publication number
CN110635111A
CN110635111A CN201910623377.5A CN201910623377A CN110635111A CN 110635111 A CN110635111 A CN 110635111A CN 201910623377 A CN201910623377 A CN 201910623377A CN 110635111 A CN110635111 A CN 110635111A
Authority
CN
China
Prior art keywords
tio
lithium
sulfur battery
active substance
ball milling
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
CN201910623377.5A
Other languages
Chinese (zh)
Inventor
朱坤磊
于洋
李梦婷
景志红
刘西成
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.)
Qufu Normal University
Original Assignee
Qufu Normal University
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 Qufu Normal University filed Critical Qufu Normal University
Priority to CN201910623377.5A priority Critical patent/CN110635111A/en
Publication of CN110635111A publication Critical patent/CN110635111A/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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • 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

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

Abstract

The invention discloses a method for preparing a titanium dioxide (TiO)2The preparation method of the lithium-sulfur battery as the additive comprises the following steps of firstly, mixing an active substance, acetylene black and polytetrafluoroethylene in a mass ratio of 60: 30: 10, dispersing in an ethanol solution, wherein the mass of the ethanol is 100 times that of the active substance, and performing ultrasonic treatment to obtain a dispersion liquid; secondly, placing the dispersion liquid in a ball milling tank for ball milling to obtain slurry; coating the slurry on aluminum foil, and drying in a forced air drying oven; and finally, placing the lithium-sulfur battery positive pole piece in a vacuum drying oven, and drying for 12 hours at the temperature of 50 ℃ in vacuum (lower than-0.8 Mpa) to obtain the lithium-sulfur battery positive pole piece. The invention adds TiO2And then, the coulomb efficiency of the lithium sulfur battery is obviously improved.

Description

By TiO2Preparation method of lithium-sulfur battery as additive
Technical Field
The invention relates to an additive of a lithium-sulfur battery in the field of new energy, in particular to a TiO-based additive2A method for preparing a lithium-sulfur battery as an additive.
Background
The lithium-sulfur battery is one of chemical power sources with great application prospects, elemental sulfur is used as a positive electrode, metal lithium is used as a negative electrode, and the theoretical specific energy of the lithium-sulfur battery is as high as 2600 Wh/kg. Therefore, it has the advantages of high specific energy, low price, environmental protection and the like. However, the lithium-sulfur battery has many problems to be solved, for example, lithium polysulfide which is an intermediate product of the sulfur electrode is easily dissolved in an organic electrolyte system to cause a "shuttle effect", resulting in low coulombic efficiency, shortened cycle life of the battery, and finally restricting the practical process of the lithium-sulfur battery.
Therefore, it is imperative to improve the coulombic efficiency of lithium-sulfur batteries. Based on the above considerations, with TiO2The invention is an adsorbent, and provides a cheap, safe and effective additive for lithium-sulfur batteries.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a TiO compound2Method for preparing lithium-sulfur battery as additive by using TiO2The additive is used as an additive of the lithium-sulfur battery, and improves the coulomb efficiency of the lithium-sulfur battery.
The invention is realized by the following technical scheme: by TiO2A method for preparing a lithium-sulfur battery as an additive, comprising the steps of:
1) mixing an active substance, acetylene black and polytetrafluoroethylene in a mass ratio of 60: 30: 10, dispersing in an ethanol solution, wherein the mass of the ethanol is 100 times that of the active substance, and performing ultrasonic treatment to obtain a dispersion liquid;
the active substance is made of sulfur and TiO2Composition is carried out;
2) placing the dispersion liquid in a ball milling tank for ball milling to obtain slurry;
3) coating the slurry on aluminum foil, and drying in a forced air drying oven;
4) and then placing the lithium-sulfur battery positive pole piece in a vacuum drying oven, and drying for 12 hours at the temperature of 50 ℃ in vacuum (lower than-0.8 Mpa) to obtain the lithium-sulfur battery positive pole piece.
TiO in the step 1)2Preferably mesoporous spherical TiO2(diameter of 100-800nm and pore diameter of 2-50nm), TiO2Mesoporous spheres (diameter of 500-5000nm and wall thickness of 50-500nm), TiO2Nanoparticles (particle diameter of 10-100nm) and TiO2Nanotube (outer diameter of 5-100nm, wall thickness of 1-20nm) and TiO2Any one of nanosheets (1-100 nm in thickness).
TiO in the step 1)2The proportion of the active substance is 0.2 wt% -2 wt%.
Advantageous effects
The invention has the beneficial effect that proper amount of TiO is added2And then, the coulomb efficiency of the lithium sulfur battery is obviously improved.
Drawings
FIG. 1 is a mesoporous spherical TiO2Scanning electron microscope pictures.
FIG. 2 is TiO2Scanning electron microscope pictures of the mesoporous spheres.
FIG. 3 is a pure S electrode and doped with 1% wt TiO2Coulombic efficiency curves at 0.1C (1C 1675mA/g) for the electrodes.
Detailed Description
The invention is further described below with reference to the following figures and specific examples. It is to be understood that the embodiments discussed herein are for illustrative purposes only and that modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the purview of the appended claims.
Example 1
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material is mesoporous spherical TiO2(diameter 250nm, pore size 4 nm). TiO 22Ratio of active substanceExample is 0.2 wt%.
Example 2
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material is mesoporous spherical TiO2(diameter 250nm, pore size 4 nm). TiO 22The proportion of the active substance is 0.5 wt%.
Example 3
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material is mesoporous spherical TiO2(diameter 340nm, pore size 20 nm). TiO 22The proportion of the active substance is 1 wt%.
Example 4
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material is mesoporous spherical TiO2(diameter 340nm, pore size 20 nm). TiO 22The proportion of the active substance is 1.5 wt%.
Example 5
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material being TiO2Mesoporous spheres (diameter 500nm, wall thickness 150 nm). TiO 22The proportion of the active substance is 2 wt%.
Example 6
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material being TiO2Mesoporous spheres (diameter 1400nm, wall thickness 300 nm). TiO 22The proportion of the active substance is 1 wt%.
Example 7
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then placing in a vacuum drying oven, and vacuumBaking at 50 deg.C under-0.8 Mpa for 12 hr. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material being TiO2Nanoparticles (particle size 20 nm). TiO 22The proportion of the active substance is 1 wt%.
Example 8
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material being TiO2Nanotubes (20 nm outer diameter, 3nm wall thickness). TiO 22The proportion of the active substance is 1 wt%.
Example 9
Adding active substance (sulfur + TiO)2) Acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery. Wherein the selected TiO2The material being TiO2Nanosheets (40 nm in thickness), and the like. TiO 22The proportion of the active substance is 1 wt%.
Comparative example
Mixing an active substance (sulfur), acetylene black and Polytetrafluoroethylene (PTFE) in a mass ratio of 60: 30: dispersing in ethanol solution, wherein the mass of ethanol is 100 times of that of the active substance, performing ultrasonic treatment at 40MHZ for 30 minutes, then placing the dispersion in a ball milling tank, and performing ball milling at the rotating speed of 400 rpm for 12 hours to obtain slurry. Coating the slurry on aluminum foil, and drying in a forced air drying oven; then the mixture is put into a vacuum drying oven and dried for 12 hours under vacuum (lower than-0.8 Mpa) and at the temperature of 50 ℃. And obtaining the positive pole piece of the lithium-sulfur battery.
FIG. 1 is a mesoporous spherical TiO2FIG. 2 is a scanning electron microscope picture of TiO2Scanning electron microscope pictures of mesoporous spheres, FIG. 3 is a pure S electrode and doped with 1% wt TiO2Coulombic efficiency curves at 0.1C (1C 1675mA/g) for the electrodes.
Battery assembly and coulombic efficiency calculation
The positive electrode pieces in the above examples and comparative examples were vacuum-dried at 50 ℃ for 12 hours. A metal lithium plate is used as a negative electrode, and a porous polypropylene membrane Celgard 2000 is used as a diaphragm. By adding 0.1M LiNO3The electrolyte solution of 1M LiTFSI/DOL: DME (v: v) ═ 1: 1, and 2032 button cells were assembled in a glove box.
The assembled cell was tested on a constant current potentiometer at a current density of 0.1C (1C 1675mA/g) and cycled 100 times. Coulombic efficiency per run-100% specific charge/discharge capacity. The coulomb efficiency was calculated for each time, and then the average value of coulomb efficiency was calculated.
TABLE 1 average Coulomb efficiencies for 100 cycles in the examples and comparative examples
As can be seen from table 1, the coulombic efficiency of the cells in each example was higher than that in the comparative example.
While the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are illustrative only and not restrictive, and various modifications which do not depart from the spirit of the present invention and which are intended to be covered by the claims of the present invention may be made by those skilled in the art.

Claims (3)

1. By TiO2The preparation method of the lithium-sulfur battery as the additive is characterized by comprising the following steps:
1) mixing an active substance, acetylene black and polytetrafluoroethylene in a mass ratio of 60: 30: 10, dispersing in an ethanol solution, wherein the mass of the ethanol is 100 times that of the active substance, and performing ultrasonic treatment to obtain a dispersion liquid;
the active substance is made of sulfur and TiO2Composition is carried out;
2) placing the dispersion liquid in a ball milling tank for ball milling to obtain slurry;
3) coating the slurry on aluminum foil, and drying in a forced air drying oven;
4) and then placing the lithium-sulfur battery positive pole piece in a vacuum drying oven, and drying for 12 hours at the temperature of 50 ℃ in vacuum (lower than-0.8 Mpa) to obtain the lithium-sulfur battery positive pole piece.
2. The method of claim 1, wherein the compound is TiO2The preparation method of the lithium-sulfur battery as the additive is characterized in that TiO in the step 1)2Preferably mesoporous spherical TiO2(diameter of 100-800nm and pore diameter of 2-50nm), TiO2Mesoporous spheres (diameter of 500-5000nm and wall thickness of 50-500nm), TiO2Nanoparticles (particle diameter of 10-100nm) and TiO2Nanotube (outer diameter of 5-100nm, wall thickness of 1-20nm) and TiO2Any one of nanosheets (1-100 nm in thickness).
3. The method of claim 1, wherein the compound is TiO2The preparation method of the lithium-sulfur battery as the additive is characterized in that TiO in the step 1)2The proportion of the active substance is 0.2 wt% -2 wt%.
CN201910623377.5A 2019-07-11 2019-07-11 By TiO2Preparation method of lithium-sulfur battery as additive Pending CN110635111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910623377.5A CN110635111A (en) 2019-07-11 2019-07-11 By TiO2Preparation method of lithium-sulfur battery as additive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910623377.5A CN110635111A (en) 2019-07-11 2019-07-11 By TiO2Preparation method of lithium-sulfur battery as additive

Publications (1)

Publication Number Publication Date
CN110635111A true CN110635111A (en) 2019-12-31

Family

ID=68969570

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910623377.5A Pending CN110635111A (en) 2019-07-11 2019-07-11 By TiO2Preparation method of lithium-sulfur battery as additive

Country Status (1)

Country Link
CN (1) CN110635111A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104282907A (en) * 2014-10-15 2015-01-14 西北工业大学 Method for preparing lithium sulfur battery cathode material
CN105633388A (en) * 2014-11-26 2016-06-01 通用汽车环球科技运作有限责任公司 Positive electrode for sulfur-based battery
CN106450237A (en) * 2016-12-08 2017-02-22 福州大学 Preparation and application of lithium-sulfur battery positive electrode composite material
CN109546092A (en) * 2017-09-22 2019-03-29 哈尔滨理工大学 The preparation method of lithium sulphur hull cell nano composite anode material
WO2019066366A1 (en) * 2017-09-28 2019-04-04 주식회사 엘지화학 Titania-carbon nanotube-sulfur (tio2-x-cnt-s) composite and preparing method therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104282907A (en) * 2014-10-15 2015-01-14 西北工业大学 Method for preparing lithium sulfur battery cathode material
CN105633388A (en) * 2014-11-26 2016-06-01 通用汽车环球科技运作有限责任公司 Positive electrode for sulfur-based battery
CN106450237A (en) * 2016-12-08 2017-02-22 福州大学 Preparation and application of lithium-sulfur battery positive electrode composite material
CN109546092A (en) * 2017-09-22 2019-03-29 哈尔滨理工大学 The preparation method of lithium sulphur hull cell nano composite anode material
WO2019066366A1 (en) * 2017-09-28 2019-04-04 주식회사 엘지화학 Titania-carbon nanotube-sulfur (tio2-x-cnt-s) composite and preparing method therefor

Similar Documents

Publication Publication Date Title
CN107611406B (en) Preparation method of silicon/graphene/carbon composite negative electrode material
CN102832379B (en) Preparation method of positive material for lithium-sulfur battery
CN107895779B (en) High-capacity potassium ion battery negative electrode material and preparation method and application thereof
CN107910502B (en) Manufacturing method of composite positive electrode of lithium battery and battery
CN107732158A (en) Lithium ion battery negative electrode preparation method, cathode pole piece and lithium ion battery
CN104766965A (en) Nanometer lithium silicon alloy material, and preparation method and use thereof
CN108400297B (en) Silicon-based lithium ion battery cathode material and preparation method thereof
CN111517374B (en) Fe7S8Preparation method of/C composite material
CN107768636A (en) A kind of preparation method of high power capacity fluoride/porous carbon composite anode material
CN108666543B (en) Sponge-like C-SiC composite material and preparation method thereof
CN106505185A (en) A kind of antimony/nitrogen-doped carbon complex and its preparation method and application
CN108281627B (en) Germanium-carbon composite negative electrode material for lithium ion battery and preparation method thereof
CN106410164A (en) High-performance composite material and preparation method and application thereof
CN107331839A (en) A kind of preparation method of carbon nanotube loaded nano titanium oxide
CN108172406A (en) One kind is with FeS2-xSexMaterial is the sodium ion capacitor of negative material
CN110620220A (en) Sn for potassium ion battery4P3/Ti3C2TxMXene composite negative electrode material
CN112310381B (en) Method for improving electrochemical performance of tin cathode material of sodium ion battery
CN110942919B (en) Water system zinc ion hybrid supercapacitor capable of being rapidly charged and discharged and preparation method thereof
CN110970611A (en) Hierarchical silicon-carbon composite material and preparation method and application thereof
CN107768650B (en) Lithium ion battery cathode material and preparation method thereof
CN115663137A (en) Metal organic framework material coated silicon ball lithium ion battery cathode material and preparation method thereof
CN115295786A (en) Method for improving multiplying power and cycling stability of hard carbon cathode of sodium ion battery
CN106099067B (en) A kind of aluminium ion positive electrode for battery material and aluminium ion battery
CN110635111A (en) By TiO2Preparation method of lithium-sulfur battery as additive
CN109920986B (en) Preparation method and application of three-dimensional porous structure composite electrode material

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20191231