CN105789574A - Preparation method of high-temperature graphite anode material for lithium-ion battery - Google Patents
Preparation method of high-temperature graphite anode material for lithium-ion battery Download PDFInfo
- Publication number
- CN105789574A CN105789574A CN201610127132.XA CN201610127132A CN105789574A CN 105789574 A CN105789574 A CN 105789574A CN 201610127132 A CN201610127132 A CN 201610127132A CN 105789574 A CN105789574 A CN 105789574A
- Authority
- CN
- China
- Prior art keywords
- ion battery
- lithium ion
- high temperature
- negative material
- graphite
- 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.)
- Granted
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
-
- 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
- H01M4/58—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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
-
- 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 discloses a preparation method of a high-temperature graphite anode material for a lithium-ion battery. The method comprises the following steps: firstly, weighing graphite, a solvent and ammonium hydroxide at the ratio of 1g to (0.5L-2L) to (2mL-10mL); adding the graphite, the solvent and the ammonium hydroxide to a high-speed homogenizer and carrying out dispersion at a rotating speed of 500-2,000r/min for 0.5-1 hour to obtain mixed slurry; dropwise adding titanate until the ratio of the mixed slurry and the titanate is 1g to (2mL-5mL); reacting in a water bath of 40-80 DEG C for 5-10 hours after the titanate is added, and repeatedly washing the product with water and ethanol for 4-5 times after reaction is ended; and finally, carrying out drying in a drying oven at 80-100 DEG C, sintering the product in an atmosphere protection furnace, heating the product to 400-800 DEG C at the heating rate of 2-25 DEG C/min and carrying out heat preservation for 4-18 hours to obtain the high-temperature graphite anode material for the lithium-ion battery.
Description
Technical field
The present invention relates to lithium ion battery negative material art, a kind of high temperature modification lithium is particularly provided
The preparation method of ion battery graphite cathode material.
Background technology
Along with the continuous intensification of global energy crisis, the increasingly exhausted and atmosphere pollution of petroleum resources,
The harm aggravation of global warning, development clean energy resource is imperative.In new forms of energy develop, tool
Have that operating voltage is high, energy density big, discharging voltage balance, have extended cycle life and environmental friendliness etc.
The lithium ion battery of advantage finds broad application.Negative material is that evaluation lithium ion battery combination property is excellent
One of bad key factor.The lithium cell cathode material that commercialization at present uses is mainly graphite, graphite
Have relatively low lithium de-/embedding current potential (0～0.25V vs Li/Li+), capacity high (372mAh/g), aboundresources
And lower-price characteristic.Along with development and the continuous progress of science and technology of social productive forces, grind
Study carefully the high-temperature behavior improving lithium ion battery so that it is exceedingly odious condition can be applicable to and necessitate.
The high-temperature behavior of battery refers to that lithium ion battery is between room temperature (25 DEG C) and safe handling temperature upper limit
Electrical property in the range of (90 DEG C) plays, including cycle performance, storage performance, high rate performance, peace
Full performance etc..In general, lithium ion battery is carried out when using environment temperature up to 85 DEG C or above
Storage, quickly flatulence can not be used by battery.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, it is an object of the invention to provide
A kind of with low cost, preparation side of technique simple high temperature modification graphite negative material of lithium ion battery is provided
Method, the graphite cathode material obtained has good solvent resistance, and remains the electric conductivity of excellence.
Meanwhile, add the service life under battery high-temperature, improve battery high-temperature storage performance and security
Energy.
For achieving the above object, the present invention uses following technical scheme: a kind of high temperature modification lithium-ion electric
The preparation method of pond graphite cathode material, comprises the following steps that
First, weighing graphite and solvent, ammoniacal liquor, its ratio is 1g:0.5-2L:2-10mL, joins
In homogenizer, rotating speed 500～2000r/min is used to carry out disperseing 0.5～1h to obtain mixing slurry；
Then, adding dropwise titanate esters, this mixing slurry is 1g:2-5mL with the ratio of titanate esters；Then,
In 40-80 DEG C of water-bath, react 5-10h after adding titanate esters, after having reacted, use water, ethanol the most clear
Wash 4-5 time, finally, dry in the drying box of 80-100 DEG C, dry and be placed in atmosphere protection stove
Row sintering, rises to 400～800 DEG C with the heating rate of 2～25 DEG C/min and to be incubated 4～18 little
Time, obtain high temperature modification graphite negative material of lithium ion battery.
As a kind of preferred version, described graphite is native graphite, and purity is more than 99.999, granularity
D50=10-20um.
As a kind of preferred version, described solvent is ethanol, at least one in propyl alcohol, butanol,
Purity is more than 99.999.
As a kind of preferred version, described ammoniacal liquor mass concentration is 25%.
As a kind of preferred version, described titanate esters is tetraethyl titanate, metatitanic acid orthocarbonate or metatitanic acid four
One in butyl ester.
As a kind of preferred version, the protective atmosphere used in described atmosphere protection stove is selected from helium, nitrogen
At least one in gas, argon gas, carbon dioxide.
The present invention compared with prior art has clear advantage and beneficial effect, particularly as follows:
1, coating one layer of " shell " containing titanium dioxide at graphite surface, titanium dioxide is resistance to molten to electrolyte
Agent, it is possible to reduce the electrolyte erosion to " core "-graphite, decreases the stripping of graphite flake layer, has
Effect ground guarantees that the electrochemical stability of battery and security performance are improved.Meanwhile, can be by regulation
The addition of ammoniacal liquor ensure " shell " thickness in 10nm, so at the high temperature cyclic performance of battery with deposit
Storage performance is improved, and battery high rate performance can be unaffected.Additionally, ultrathin nanometer cladding " shell "
Layer can ensure that electric conductivity is excellent, thus reduces battery polarization and the internal resistance that " shell " layer brings.
2, the inventive method is simple to operation, produces equipment few, thus reduces cost further, just
In popularization and application, be suitable to large-scale production.
Detailed description of the invention
Embodiment 1
A kind of preparation method of high temperature modification graphite negative material of lithium ion battery, first, weigh graphite and
Solvent, ammoniacal liquor, its ratio is 1g:0.5L:2mL, joins in homogenizer, uses rotating speed
500r/min carries out disperseing 1h to obtain mixing slurry；Then, adding dropwise titanate esters, this mixing is starched
It is 1g:2mL with the ratio of titanate esters；Then, in 80 DEG C of water-baths, 5h, reaction are reacted after adding titanate esters
Repeatedly clean 4 times with water, ethanol after completing, finally, dry in the drying box of 80 DEG C, dry rearmounted
It is sintered in atmosphere protection stove, rises to 400 DEG C with the heating rate of 2 DEG C/min and be incubated 18
Hour, obtain high temperature modification graphite negative material of lithium ion battery.
Described graphite is native graphite, and purity is more than 99.999, granularity d50=10-20um.
Described solvent is ethanol, at least one in propyl alcohol, butanol, and purity is more than 99.999.
Described ammoniacal liquor mass concentration is 25%.
Described titanate esters is the one in tetraethyl titanate, metatitanic acid orthocarbonate or butyl titanate.
The protective atmosphere used in described atmosphere protection stove is selected from helium, nitrogen, argon gas, carbon dioxide
In at least one.
Embodiment 2
A kind of preparation method of high temperature modification graphite negative material of lithium ion battery, first, weigh graphite and
Solvent, ammoniacal liquor, its ratio is 1g:2L:10mL, joins in homogenizer, uses rotating speed 2000
R/min carries out disperseing 0.5h to obtain mixing slurry；Then, add dropwise titanate esters, this mixing slurry with
The ratio of titanate esters is 1g:5mL；Then, in 80 DEG C of water-baths, 5h, reaction are reacted after adding titanate esters
Repeatedly clean 4 times with water, ethanol after completing, finally, dry in the drying box of 100 DEG C, after drying
It is placed in atmosphere protection stove and is sintered, rise to 800 DEG C with the heating rate of 25 DEG C/min and be incubated 4
Hour, obtain high temperature modification graphite negative material of lithium ion battery.
Described graphite is native graphite, and purity is more than 99.999, granularity d50=10-20um.
Described solvent is ethanol, at least one in propyl alcohol, butanol, and purity is more than 99.999.
Described ammoniacal liquor mass concentration is 25%.
Described titanate esters is the one in tetraethyl titanate, metatitanic acid orthocarbonate or butyl titanate.
The protective atmosphere used in described atmosphere protection stove is selected from helium, nitrogen, argon gas, carbon dioxide
In at least one.
Embodiment 3
A kind of preparation method of high temperature modification graphite negative material of lithium ion battery, first, weigh graphite and
Solvent, ammoniacal liquor, its ratio is 1g:1L:6mL, joins in homogenizer, uses rotating speed 1000r/min
Carry out disperseing 0.7h to obtain mixing slurry；Then, titanate esters is added dropwise, this mixing slurry and metatitanic acid
The ratio of ester is 1g:3mL；Then, reacting 60h after adding titanate esters in 50 DEG C of water-baths, reaction completes
Repeatedly cleaning 4 times with water, ethanol afterwards, finally, dry in the drying box of 100 DEG C, drying is placed on
Atmosphere protection stove is sintered, rises to 600 DEG C with the heating rate of 15 DEG C/min and to be incubated 8 little
Time, obtain high temperature modification graphite negative material of lithium ion battery.
Described graphite is native graphite, and purity is more than 99.999, granularity d50=10-20um.
Described solvent is ethanol, at least one in propyl alcohol, butanol, and purity is more than 99.999.
Described ammoniacal liquor mass concentration is 25%.
Described titanate esters is the one in tetraethyl titanate, metatitanic acid orthocarbonate or butyl titanate.
The protective atmosphere used in described atmosphere protection stove is selected from helium, nitrogen, argon gas, carbon dioxide
In at least one.
Embodiment 4
A kind of preparation method of high temperature modification graphite negative material of lithium ion battery, first, weigh graphite and
Solvent, ammoniacal liquor, its ratio is 1g:1.5L:8mL, joins in homogenizer, uses rotating speed 1500
R/min carries out disperseing 0.7h to obtain mixing slurry；Then, add dropwise titanate esters, this mixing slurry with
The ratio of titanate esters is 1g:4mL；Then, in 70 DEG C of water-baths, react 7h after adding titanate esters, reacted
Cheng Houyong water, ethanol clean 4 times repeatedly, finally, dry in the drying box of 90 DEG C, and drying is placed on
Atmosphere protection stove is sintered, rises to 700 DEG C with the heating rate of 20 DEG C/min and be incubated 7 hours,
Obtain high temperature modification graphite negative material of lithium ion battery.
Described graphite is native graphite, and purity is more than 99.999, granularity d50=10-20um.
Described solvent is ethanol, at least one in propyl alcohol, butanol, and purity is more than 99.999.
Described ammoniacal liquor mass concentration is 25%.
Described titanate esters is the one in tetraethyl titanate, metatitanic acid orthocarbonate or butyl titanate.
The protective atmosphere used in described atmosphere protection stove is selected from helium, nitrogen, argon gas, carbon dioxide
In at least one.
Comparative example 1
Use the modified natural graphite material that pitch obtains as covering material.
Below foregoing individual embodiments and comparative example are carried out electrochemical property test:
For detecting the property of the lithium ion battery negative material of ionic liquid coated graphite negative material of the present invention
Can, test by half-cell method of testing, with above example and the negative material of comparative example: SBR (Gu
Content 50%): CMC: Super-p=95.5: 2: 1.5: 1 (weight ratio), add appropriate amount of deionized water
Reconcile into pulpous state, coat on Copper Foil and be dried in vacuum drying chamber and make negative plate in 12 hours,
Electrolyte is 1M LiPF6/EC+DEC+DMC=1: 1: 1, and microporous polypropylene membrane is barrier film,
It is lithium sheet to electrode, is assembled into battery.Constant current charge-discharge experiment is carried out at LAND battery test system,
Charging/discharging voltage is limited in 0.01～3.0V, and the discharge and recharge cabinet computerizedd control carries out adopting of data
Collection and control, test temperature: 25 DEG C and 60 DEG C.The data obtained are as shown in table 1 below.
Table 1 lists different embodiment and the negative material Performance comparision of comparative example.
As it can be seen from table 1 titanium dioxide " shell " layer add and greatly improved the height of battery
Temperature cycle performance and high-temperature storage performance.Visible employing uses and invention increases making under battery high-temperature
With the life-span, improve battery high-temperature storage performance and security performance.
The above, be only presently preferred embodiments of the present invention, the not technical scope to the present invention
Impose any restrictions, therefore every technical spirit according to the present invention is to made for any of the above embodiments any trickle
Amendment, equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (6)
1. the preparation method of a high temperature modification graphite negative material of lithium ion battery, it is characterised in that: bag
Include and have the following steps:
First, weighing graphite and solvent, ammoniacal liquor, its ratio is 1g:0.5-2L:2-10mL, joins
In homogenizer, rotating speed 500～2000r/min is used to carry out disperseing 0.5～1h to obtain mixing slurry；
Then, adding dropwise titanate esters, this mixing slurry is 1g:2-5mL with the ratio of titanate esters；Then,
In 40-80 DEG C of water-bath, react 5-10h after adding titanate esters, after having reacted, use water, ethanol the most clear
Wash 4-5 time, finally, dry in the drying box of 80-100 DEG C, dry and be placed in atmosphere protection stove
Row sintering, rises to 400～800 DEG C with the heating rate of 2～25 DEG C/min and to be incubated 4～18 little
Time, obtain high temperature modification graphite negative material of lithium ion battery.
A kind of preparation side of high temperature modification graphite negative material of lithium ion battery
Method, it is characterised in that: described graphite is native graphite, and purity is more than 99.999, granularity d50=10-20
um。
A kind of preparation side of high temperature modification graphite negative material of lithium ion battery
Method, it is characterised in that: described solvent is ethanol, at least one in propyl alcohol, butanol, and purity is
More than 99.999.
A kind of preparation side of high temperature modification graphite negative material of lithium ion battery
Method, it is characterised in that: described ammoniacal liquor mass concentration is 25%.
A kind of preparation side of high temperature modification graphite negative material of lithium ion battery
Method, it is characterised in that: described titanate esters is in tetraethyl titanate, metatitanic acid orthocarbonate or butyl titanate
One.
A kind of preparation side of high temperature modification graphite negative material of lithium ion battery
Method, it is characterised in that: the protective atmosphere used in described atmosphere protection stove is selected from helium, nitrogen, argon
At least one in gas, carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127132.XA CN105789574B (en) | 2016-03-04 | 2016-03-04 | A kind of preparation method of high temperature modification graphite negative material of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127132.XA CN105789574B (en) | 2016-03-04 | 2016-03-04 | A kind of preparation method of high temperature modification graphite negative material of lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105789574A true CN105789574A (en) | 2016-07-20 |
| CN105789574B CN105789574B (en) | 2018-10-02 |
Family
ID=56386577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610127132.XA Active CN105789574B (en) | 2016-03-04 | 2016-03-04 | A kind of preparation method of high temperature modification graphite negative material of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105789574B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482205A (en) * | 2017-08-24 | 2017-12-15 | 华南师范大学 | A kind of graphite negative material of lithium ion battery and preparation method thereof |
| CN110137469A (en) * | 2019-05-16 | 2019-08-16 | 湖南鸿捷新材料有限公司 | A kind of waste and old lithium ion battery graphite cathode material regeneration method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672169A (en) * | 2012-06-07 | 2012-09-19 | 北京科技大学 | Method for preparing gold/titanium dioxide core-shell nanoparticle |
| CN104701505A (en) * | 2013-12-10 | 2015-06-10 | 三星Sdi株式会社 | Negative active material and lithium battery including the material, and method for manufacturing the material |
-
2016
- 2016-03-04 CN CN201610127132.XA patent/CN105789574B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672169A (en) * | 2012-06-07 | 2012-09-19 | 北京科技大学 | Method for preparing gold/titanium dioxide core-shell nanoparticle |
| CN104701505A (en) * | 2013-12-10 | 2015-06-10 | 三星Sdi株式会社 | Negative active material and lithium battery including the material, and method for manufacturing the material |
Non-Patent Citations (1)
| Title |
|---|
| JINLONG LIU等: ""Anatase-TiO2/CNTs nanocomposite as a superior high-rate anode material for lithium-ion batteries"", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482205A (en) * | 2017-08-24 | 2017-12-15 | 华南师范大学 | A kind of graphite negative material of lithium ion battery and preparation method thereof |
| CN110137469A (en) * | 2019-05-16 | 2019-08-16 | 湖南鸿捷新材料有限公司 | A kind of waste and old lithium ion battery graphite cathode material regeneration method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105789574B (en) | 2018-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105140477B (en) | Si-C composite material and preparation method thereof | |
| CN105098143B (en) | A kind of lithium-sulfur cell flexibility high-sulfur load selfreparing anode structure and preparation method thereof | |
| CN107579204A (en) | Lithium anode piece and preparation method thereof and lithium metal secondary battery | |
| CN103311514B (en) | A kind of preparation method of modification lithium-ion battery graphite cathode material | |
| CN103208618B (en) | Carbon in lithium ion battery sulphur composite positive pole and preparation method thereof | |
| CN110120496A (en) | A kind of negative electrode of lithium ion battery and its prelithiation methods and applications | |
| CN101859886A (en) | Lithium ion battery anode material and preparation method thereof | |
| CN104282896A (en) | Nitrogen-doped carbon-coated graphite negative electrode material and preparation method thereof | |
| CN109671929A (en) | The Li-Si alloy composite negative pole material and preparation method thereof of sulfide electrolyte cladding | |
| CN105118971A (en) | Lithium ion battery negative electrode material and preparation method | |
| CN104966814A (en) | High-security metallic lithium cathode and preparation method thereof | |
| CN113140731B (en) | All-solid-state lithium battery and preparation method thereof | |
| CN106410153A (en) | Titanium nitride-cladded nickel titanate composite material as well as preparation method and application thereof | |
| CN116654895B (en) | Phosphorus-tin co-doped hard carbon negative electrode material and preparation method thereof | |
| Shi et al. | In-situ growth poly (N-methylaniline) coating on sulfur cathode for lithium-sulfur battery | |
| CN102664247A (en) | Method for preparing LiFePO4/SiC lithium battery positive plate by microwave heating | |
| CN112018387A (en) | Preparation method of preformed film negative electrode material and lithium ion battery | |
| CN108807912A (en) | A kind of C@SnOx(x=0,1,2)The preparation and application of the mesoporous shape hollow nano spherical structures of@C | |
| CN107634177A (en) | A kind of LiFePO4 combination electrode of surface metal oxide coating | |
| CN105789574A (en) | Preparation method of high-temperature graphite anode material for lithium-ion battery | |
| CN102237524A (en) | Surface coated lithium cobaltate, preparation method thereof and lithium ion battery | |
| CN204885286U (en) | Lithium metal negative pole of high security | |
| CN115566170A (en) | Preparation method of high-energy-density quick-charging lithium ion battery cathode material | |
| CN109360966A (en) | A kind of manufacturing method and battery of battery pole piece | |
| CN105720269B (en) | A kind of big interlamellar spacing graphite cathode material preparation method of sodium-ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 20 J unit, C building, 9 blocks, 1 Energy Science Park, Longhua Road, Longhua District, Shenzhen, Guangdong, 518131 Applicant after: Shenzhen City Cheung Polytron Technologies Inc. Fenghua Applicant after: DONGGUAN XFH BATTERY MATERIAL CO.,LTD. Applicant after: FUJIAN XFH NEW ENERGY MATERIALS Co.,Ltd. Address before: 518000 room 6, building 1, 30 District, 2 Science and Technology Park, 603 science Road, Nanshan District, Guangdong, Shenzhen Applicant before: Shenzhen Xiangfenghua Technology Co.,Ltd. Applicant before: DONGGUAN XFH BATTERY MATERIAL CO.,LTD. Applicant before: FUJIAN XFH NEW ENERGY MATERIALS Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20171101 Address after: 20 J unit, C building, 9 blocks, 1 Energy Science Park, Longhua Road, Longhua District, Shenzhen, Guangdong, 518131 Applicant after: Shenzhen City Cheung Polytron Technologies Inc. Fenghua Applicant after: FUJIAN XFH NEW ENERGY MATERIALS Co.,Ltd. Address before: 20 J unit, C building, 9 blocks, 1 Energy Science Park, Longhua Road, Longhua District, Shenzhen, Guangdong, 518131 Applicant before: Shenzhen City Cheung Polytron Technologies Inc. Fenghua Applicant before: DONGGUAN XFH BATTERY MATERIAL CO.,LTD. Applicant before: FUJIAN XFH NEW ENERGY MATERIALS Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |