CN107394158A - A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite - Google Patents

A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite Download PDF

Info

Publication number
CN107394158A
CN107394158A CN201710599847.XA CN201710599847A CN107394158A CN 107394158 A CN107394158 A CN 107394158A CN 201710599847 A CN201710599847 A CN 201710599847A CN 107394158 A CN107394158 A CN 107394158A
Authority
CN
China
Prior art keywords
graphite
expanded graphite
silicon
carbon
parts
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
CN201710599847.XA
Other languages
Chinese (zh)
Inventor
张娟
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201710599847.XA priority Critical patent/CN107394158A/en
Publication of CN107394158A publication Critical patent/CN107394158A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • 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
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • 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)
  • Nanotechnology (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention discloses a kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite, potassium permanganate and concentrated sulfuric acid oxidation intercalation natural flake graphite are used in the present invention, the oxy radicals such as hydroxyl, epoxide group and carboxyl are introduced in graphite layers, increase graphite layers away from, afterwards under microwave field action, oxy radical thermal decomposition inside graphite, produces CO, CO2And H2The gases such as O, caused impulsive force causes graphite flake layer rapid expansion, graphite linings lamella is softened, further increase graphite layers away from, weaken interlayer Van der Waals force, increase stone ink Women piece interlayers distance, so as to lift the embedding lithium capacity of electrode material to a certain extent, " buffering matrix " as silicon electrode simultaneously, can accommodate expansion/contraction of the nano-silicon dioxide particle in charge and discharge process, improve the cyclical stability and high rate performance of electrode material.

Description

A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite
Technical field
The present invention relates to a kind of lithium cell cathode material field, and in particular to it is compound that one kind based on expanded graphite prepares silicon-carbon The method of type lithium cell cathode material.
Background technology
Lithium battery has big operating voltage height, energy density, discharging voltage balance, circulation compared with other secondary cells Long lifespan and advantages of environment protection, the fields such as portable type electronic product and electric tool are had been widely used for, and be expected to As one of the main energy sources of following hybrid vehicle and pure power vehicle supply.Negative material is evaluation lithium battery integrated One of key factor that can be good and bad.
So far, in negative material silicon theoretical capacity highest.It is generally acknowledged that at normal temperatures, silicium cathode and lithium alloyage Caused rich lithium product is mainly Li3.75Si phases, capacity are up to 3572mAh/g, much larger than the theoretical capacity of graphite, but it is adjoint Huge Volume Changes, its volumetric expansion is up to 270%, and the efflorescence of silicon causes electrode structure unstability and failed, and causes electrode knot The avalanche of structure and active material are peeled off and electrode is lost electrical contact, and the capacity of electrode significantly declines therewith even to be lost completely Effect.
In order to avoid the disadvantages mentioned above of silicon, in numerous schemes using " cushioning frame " come the method that compensating material expands by Pay attention to.Graphite has lamellar structure, can slow down the structural remodeling process in charge and discharge process, so as to avoid negative material structure Avalanche, be suitable as buffer matrix.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides one kind and prepares the compound cathode of lithium battery of silicon-carbon based on expanded graphite The method of material.
The present invention is achieved by the following technical solutions：
A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite, its preparation technology are as follows：
（1）Coated Si O2Forerunner's dispersion liquid：
1., under magnetic stirring, into 90-120 parts by weight of ethanol, the mixing liquid of 5-9 parts deionized water and 6-12 part ammoniacal liquor 3-8 part TEOS are slowly added dropwise, stirs centrifuge washing, drying after 4-6 hours, obtains silica nanosphere, it is standby；
2., by 30-50 parts ethanol, 1-3 parts cetyl trimethylammonium bromide and 5-10 parts zinc acetate mix, strong agitation 40- 60 minutes, homogeneous solution is obtained, adds silica nanosphere afterwards, ultrasonic disperse is uniform, and generation cladding salt precursor body disperses Liquid；
（2）Weigh 20-40 part crystalline flake graphites to be slowly added into 110-180 part concentrated sulfuric acids, be slowly added to 35- under agitation 55 parts of potassium permanganate, under 30-40 DEG C of bath temperature, intermittent stirring 1-2 hours, it is washed with deionized to neutrality, filtering, dries It is dry, expansible graphite is produced, dried expansible graphite is placed in micro-wave oven expanded afterwards, Bulking Time 15- 25s, obtain expanded graphite；
（3）To step（1）Step is added in forerunner's dispersion liquid（2）Expanded graphite, it is placed in reaction bulb, vacuumizes 20- in advance 40 minutes, 5-10 minutes then are stood, then are repeated and vacuumize-stewing process 3-5 time, under pressure inducement, liquid injects To the interlayer of expanded graphite；
（4）By step（3）The expanded graphite of injection forerunner's dispersion liquid is transferred in reactor, is heated in reducing atmosphere stove 900-1200 DEG C of sintering 10-20 minute, zinc oxide/graphene coated silica complex is obtained after being cooled to room temperature, then To be soaked 8-25 minutes with hydrochloric acid solution, cleaning removes zinc oxide, after being washed repeatedly with absolute ethyl alcohol, deionized water, vacuum drying, Obtain silica@graphene composite negative poles.
Wherein, step（2）Described in microwave expansion actual conditions be：Microwave power is 10kW, temperature 900-980 ℃。
Wherein, step（4）Described in the concentration of hydrochloric acid solution be 10-30%.
Wherein, step（4）Described in vacuum drying temperature be 60-70 DEG C.
Compared with prior art, the present invention has advantages below：
（1）In the present invention using potassium permanganate and the concentrated sulfuric acid oxidation intercalation natural flake graphite, graphite layers introduce hydroxyl, The oxy radical such as epoxide group and carboxyl, increase graphite layers away from, afterwards under microwave field action, oxy radical inside graphite Thermal decomposition, produce CO, CO2And H2The gases such as O, caused impulsive force cause graphite flake layer rapid expansion, and graphite linings lamella is supportted Open, further increase graphite layers away from, weaken interlayer Van der Waals force, increase stone ink Women piece interlayers distance, so as to one Determine the embedding lithium capacity of lifting electrode material in degree, while as " the buffering matrix " of silicon electrode, nanometer titanium dioxide can be accommodated Expansion/contraction of the silicon particle in charge and discharge process, improve the cyclical stability and high rate performance of electrode material.
（2）Zinc oxide ZnO nano crystalline substance reaches the effect of exfoliated graphite layer in expanded graphite interlayer growth in situ in the present invention Fruit, after high temperature reduction, silica/zinc oxide is uniformly adhered in the space of graphene sheet layer, can effectively prevent stone The stacking of black alkene, agglomeration traits, after soaked through hydrochloric acid and remove zinc oxide, composite inner forms abundant pore passage structure, These pore passage structures can provide substantial amounts of passage for lithium ion, increase the embedded location of lithium ion, greatly improve it Storage lithium performance as lithium cell cathode material.
Embodiment
A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite, its preparation technology are as follows：
（1）Coated Si O2Forerunner's dispersion liquid：
1., under magnetic stirring, to 90 parts by weight of ethanol, 6 parts of deionized waters with being slowly added dropwise 7 in the mixing liquid of 6 parts of ammoniacal liquor Part TEOS, centrifuge washing, drying, obtain silica nanosphere after stirring 5 hours, standby；
2., 40 parts of ethanol, 2 parts of cetyl trimethylammonium bromides and 8 parts of zinc acetates are mixed, strong agitation 50 minutes, obtain Homogeneous solution, silica nanosphere is added afterwards, ultrasonic disperse is uniform, generation cladding salt precursor dispersion liquid；
（2）Weigh 30 parts of crystalline flake graphites to be slowly added into 120 parts of concentrated sulfuric acids, be slowly added to 45 parts of permanganic acid under agitation Potassium, under 35 DEG C of bath temperatures, intermittent stirring 2 hours, it is washed with deionized to neutrality, filtering, drying, produces inflatable stone Ink, dried expansible graphite is placed in micro-wave oven expanded afterwards, Bulking Time 25s, obtain expanded graphite；
（3）To step（1）Step is added in forerunner's dispersion liquid（2）Expanded graphite, it is placed in reaction bulb, vacuumizes 30 points in advance Clock, 8 minutes then are stood, then be repeated and vacuumize-stewing process 4 times, under pressure inducement, liquid is injected into expanded graphite Interlayer；
（4）By step（3）The expanded graphite of injection forerunner's dispersion liquid is transferred in reactor, is heated in reducing atmosphere stove 900 DEG C are sintered 15 minutes, and zinc oxide/graphene coated silica complex is obtained after being cooled to room temperature, then molten with hydrochloric acid Liquid soaks 20 minutes, and cleaning removes zinc oxide, after being washed repeatedly with absolute ethyl alcohol, deionized water, vacuum drying, obtains titanium dioxide Silicon@graphene composite negative poles.
Wherein, step（2）Described in microwave expansion actual conditions be：Microwave power is 10kW, and temperature is 950 DEG C.
Wherein, step（4）Described in hydrochloric acid solution concentration be 20%.
Wherein, step（4）Described in vacuum drying temperature be 70 DEG C.

Claims (4)

  1. A kind of 1. method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite, it is characterised in that it prepares work Skill is as follows：
    （1）Coated Si O2Forerunner's dispersion liquid：
    1., under magnetic stirring, into 90-120 parts by weight of ethanol, the mixing liquid of 5-9 parts deionized water and 6-12 part ammoniacal liquor 3-8 part TEOS are slowly added dropwise, stirs centrifuge washing, drying after 4-6 hours, obtains silica nanosphere, it is standby；
    2., by 30-50 parts ethanol, 1-3 parts cetyl trimethylammonium bromide and 5-10 parts zinc acetate mix, strong agitation 40- 60 minutes, homogeneous solution is obtained, adds silica nanosphere afterwards, ultrasonic disperse is uniform, and generation cladding salt precursor body disperses Liquid；
    （2）Weigh 20-40 part crystalline flake graphites to be slowly added into 110-180 part concentrated sulfuric acids, be slowly added to 35- under agitation 55 parts of potassium permanganate, under 30-40 DEG C of bath temperature, intermittent stirring 1-2 hours, it is washed with deionized to neutrality, filtering, dries It is dry, expansible graphite is produced, dried expansible graphite is placed in micro-wave oven expanded afterwards, Bulking Time 15- 25s, obtain expanded graphite；
    （3）To step（1）Step is added in forerunner's dispersion liquid（2）Expanded graphite, it is placed in reaction bulb, vacuumizes 20- in advance 40 minutes, 5-10 minutes then are stood, then are repeated and vacuumize-stewing process 3-5 time, under pressure inducement, liquid injects To the interlayer of expanded graphite；
    （4）By step（3）The expanded graphite of injection forerunner's dispersion liquid is transferred in reactor, is heated in reducing atmosphere stove 900-1200 DEG C of sintering 10-20 minute, zinc oxide/graphene coated silica complex is obtained after being cooled to room temperature, then To be soaked 8-25 minutes with hydrochloric acid solution, cleaning removes zinc oxide, after being washed repeatedly with absolute ethyl alcohol, deionized water, vacuum drying, Obtain silica@graphene composite negative poles.
  2. A kind of 2. side that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite according to claims 1 Method, it is characterised in that step（2）Described in microwave expansion actual conditions be：Microwave power is 10kW, temperature 900- 980℃。
  3. A kind of 3. side that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite according to claims 1 Method, it is characterised in that step（4）Described in the concentration of hydrochloric acid solution be 10-30%.
  4. A kind of 4. side that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite according to claims 1 Method, it is characterised in that step（4）Described in vacuum drying temperature be 60-70 DEG C.
CN201710599847.XA 2017-07-21 2017-07-21 A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite Pending CN107394158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710599847.XA CN107394158A (en) 2017-07-21 2017-07-21 A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710599847.XA CN107394158A (en) 2017-07-21 2017-07-21 A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite

Publications (1)

Publication Number Publication Date
CN107394158A true CN107394158A (en) 2017-11-24

Family

ID=60336802

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710599847.XA Pending CN107394158A (en) 2017-07-21 2017-07-21 A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite

Country Status (1)

Country Link
CN (1) CN107394158A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108410066A (en) * 2018-04-13 2018-08-17 西南交通大学 A kind of SiO2The preparation method of nanometer particle-modified expansible graphite and polypropylene flame redardant
CN108832087A (en) * 2018-06-08 2018-11-16 湖南大学 A kind of cell negative electrode material and preparation method thereof
CN109841818A (en) * 2019-03-05 2019-06-04 电子科技大学 A kind of preparation method and applications of lithium secondary battery cathode material
CN109920582A (en) * 2019-01-28 2019-06-21 芜湖航天特种电缆厂股份有限公司 Corrosion-resistant anti-mildew cable and preparation method thereof
CN111933916A (en) * 2020-10-12 2020-11-13 长沙矿冶研究院有限责任公司 Negative electrode active material and preparation method thereof
CN113036306A (en) * 2021-02-20 2021-06-25 山东天瀚新能源科技有限公司 Silicon-doped lithium supplement technical scheme and assembly method of lithium ion battery
CN113511651A (en) * 2021-09-09 2021-10-19 成都特隆美储能技术有限公司 Preparation method of polypyrrole-modified micro-oxidation expanded graphite negative electrode material
CN114464790A (en) * 2022-01-25 2022-05-10 四川金汇能新材料股份有限公司 Pre-lithiated silica composite material, preparation method and application
CN115057466A (en) * 2022-08-04 2022-09-16 安徽进化硅纳米材料科技有限公司 Modified nano zinc oxide composite material and preparation method and application thereof
CN115286347A (en) * 2022-08-15 2022-11-04 威赫炘源纳米科技(苏州)有限公司 Preparation method of nano aerogel heat insulation material
CN115676819A (en) * 2021-07-21 2023-02-03 比亚迪股份有限公司 Graphite material preparation method, graphite material and power battery

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102031090A (en) * 2010-11-12 2011-04-27 张东 Phase change graphite powder with phase change energy storage function and preparation method thereof
CN105226249A (en) * 2015-09-11 2016-01-06 王晓亮 A kind of 3 SiC 2/graphite alkene core-shell material and Synthesis and applications thereof with gap
CN105449210A (en) * 2015-11-18 2016-03-30 福建翔丰华新能源材料有限公司 Preparation method for porous graphene micro-sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102031090A (en) * 2010-11-12 2011-04-27 张东 Phase change graphite powder with phase change energy storage function and preparation method thereof
CN105226249A (en) * 2015-09-11 2016-01-06 王晓亮 A kind of 3 SiC 2/graphite alkene core-shell material and Synthesis and applications thereof with gap
CN105449210A (en) * 2015-11-18 2016-03-30 福建翔丰华新能源材料有限公司 Preparation method for porous graphene micro-sheet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
蒋保江等: "膨胀石墨层间生长高活性氧化锌及其光催化性能", 《高等学校化学学报》 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108410066B (en) * 2018-04-13 2020-07-17 西南交通大学 SiO (silicon dioxide)2Preparation method of nano particle modified expandable graphite and flame-retardant polypropylene
CN108410066A (en) * 2018-04-13 2018-08-17 西南交通大学 A kind of SiO2The preparation method of nanometer particle-modified expansible graphite and polypropylene flame redardant
CN108832087A (en) * 2018-06-08 2018-11-16 湖南大学 A kind of cell negative electrode material and preparation method thereof
CN108832087B (en) * 2018-06-08 2021-04-30 湖南大学 Battery negative electrode material and preparation method thereof
CN109920582A (en) * 2019-01-28 2019-06-21 芜湖航天特种电缆厂股份有限公司 Corrosion-resistant anti-mildew cable and preparation method thereof
CN109841818B (en) * 2019-03-05 2021-12-03 电子科技大学 Preparation method and application of negative electrode material of lithium secondary battery
CN109841818A (en) * 2019-03-05 2019-06-04 电子科技大学 A kind of preparation method and applications of lithium secondary battery cathode material
CN111933916A (en) * 2020-10-12 2020-11-13 长沙矿冶研究院有限责任公司 Negative electrode active material and preparation method thereof
CN113036306A (en) * 2021-02-20 2021-06-25 山东天瀚新能源科技有限公司 Silicon-doped lithium supplement technical scheme and assembly method of lithium ion battery
CN115676819A (en) * 2021-07-21 2023-02-03 比亚迪股份有限公司 Graphite material preparation method, graphite material and power battery
CN113511651A (en) * 2021-09-09 2021-10-19 成都特隆美储能技术有限公司 Preparation method of polypyrrole-modified micro-oxidation expanded graphite negative electrode material
CN113511651B (en) * 2021-09-09 2021-11-26 成都特隆美储能技术有限公司 Preparation method of polypyrrole-modified micro-oxidation expanded graphite negative electrode material
CN114464790A (en) * 2022-01-25 2022-05-10 四川金汇能新材料股份有限公司 Pre-lithiated silica composite material, preparation method and application
CN114464790B (en) * 2022-01-25 2023-06-02 四川金汇能新材料股份有限公司 Pre-lithiated silica composite material, preparation method and application
CN115057466A (en) * 2022-08-04 2022-09-16 安徽进化硅纳米材料科技有限公司 Modified nano zinc oxide composite material and preparation method and application thereof
CN115057466B (en) * 2022-08-04 2024-03-08 安徽进化硅纳米材料科技有限公司 Modified nano zinc oxide composite material and preparation method and application thereof
CN115286347A (en) * 2022-08-15 2022-11-04 威赫炘源纳米科技(苏州)有限公司 Preparation method of nano aerogel heat insulation material

Similar Documents

Publication Publication Date Title
CN107394158A (en) A kind of method that the compound lithium cell cathode material of silicon-carbon is prepared based on expanded graphite
CN106025196B (en) Preparation method of silicon-carbon negative electrode composite material with high specific surface area
CN106229488B (en) A kind of pillared MXene composite material of oxide and its application
CN107887587A (en) Composite cathode material for lithium ion cell and preparation method thereof
CN104617276B (en) Lithium rechargeable battery porous silicon/carbon compound cathode materials and preparation method thereof
CN106450251B (en) A kind of lithium ion battery negative material and preparation method thereof
CN103441247B (en) A kind of high performance silicon/graphene oxide negative material constructed based on chemical bond and preparation method thereof
CN109167066A (en) A kind of preparation method of few layer titanium carbide growth in situ nitrogen-doped carbon nanometer pipe three-dimensional composite material
CN105810915B (en) A kind of preparation of order mesoporous carbon ball composite material of the embedding sulphur of graphene coated and the application as lithium sulfur battery anode material
CN104973595B (en) A kind of three-dimensional porous grapheme material and preparation method and application
CN103050668B (en) Method for preparing Si/C composite cathode material for lithium ion battery
CN104953122A (en) Nanometer silicon and carbon composite negative electrode material and preparation method and lithium ion battery thereof
CN105280897B (en) A kind of preparation method of lithium ion battery negative material C/ZnO/Cu composites
CN108899484A (en) Preparation method of carbon-coated hollow nano-silicon tube serving as negative electrode material of lithium ion battery
CN112421048A (en) Method for preparing graphite-coated nano-silicon lithium battery negative electrode material at low cost
CN103515587A (en) Preparation methods of lithium titanate-graphene composite material and lithium ion battery
CN108615871A (en) A kind of preparation method and applications of lithium cell cathode material MXene
CN106976917A (en) Sheet cobalt black two-dimensional layer carbonization titanium composite material and its two-step preparation
CN113193194A (en) Nano silicon @ nitrogen-phosphorus double-doped carbon composite material and preparation method thereof
CN114079045B (en) Porous silicon/carbon composite material synthesized in situ by taking porous polymer microspheres as templates, preparation method and lithium ion battery
CN110534710A (en) Silicon/carbon composite and its preparation method and application
CN113104852A (en) Preparation method of silicon-carbon negative electrode material of lithium ion battery
CN103456937A (en) Preparation methods of lithium titanate-graphene composite material and lithium ion battery
CN104843800B (en) A kind of solvothermal preparation method of carbon coated ferriferrous oxide negative material
CN103730662B (en) A kind of lithium ion battery negative silicon/carbon dioxide composite material and preparation method thereof

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
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20171124