CN108217640A - A kind of preparation method of the cathode of lithium ion battery available for quick charge - Google Patents
A kind of preparation method of the cathode of lithium ion battery available for quick charge Download PDFInfo
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- CN108217640A CN108217640A CN201810017551.7A CN201810017551A CN108217640A CN 108217640 A CN108217640 A CN 108217640A CN 201810017551 A CN201810017551 A CN 201810017551A CN 108217640 A CN108217640 A CN 108217640A
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- lithium ion
- ion battery
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000000243 solution Substances 0.000 claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 28
- 239000010439 graphite Substances 0.000 claims abstract description 28
- 239000007770 graphite material Substances 0.000 claims abstract description 21
- 150000002500 ions Chemical class 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 12
- 230000001590 oxidative effect Effects 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 5
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- 238000013019 agitation Methods 0.000 claims description 9
- 238000009938 salting Methods 0.000 claims description 9
- 239000003518 caustics Substances 0.000 claims description 8
- 239000004323 potassium nitrate Substances 0.000 claims description 7
- 235000010333 potassium nitrate Nutrition 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- 238000009830 intercalation Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 3
- 229910001413 alkali metal ion Inorganic materials 0.000 claims description 3
- 230000002687 intercalation Effects 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000006193 liquid solution Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- 239000001632 sodium acetate Substances 0.000 claims description 2
- 235000017281 sodium acetate Nutrition 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 239000004317 sodium nitrate Substances 0.000 claims description 2
- 235000010344 sodium nitrate Nutrition 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 150000001340 alkali metals Chemical class 0.000 claims 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 claims 1
- -1 ion salt Chemical class 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 4
- 210000001787 dendrite Anatomy 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 239000011229 interlayer Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract description 2
- 239000011259 mixed solution Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 9
- 230000006872 improvement Effects 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910002986 Li4Ti5O12 Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
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
- H01M4/58—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
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of method of modifying of fast charge graphite negative electrode of lithium ion battery, belong to lithium ion battery fast charge field.The present invention handles lamellar graphite by the method that interlayer ion under acid corrosion and oxidative conditions is embedded in, for fast charge lithium ion battery negative material.The technical solution adopted is that lamellar graphite is placed in acidic mixed solution of a certain concentration with certain oxidisability, control temperature is filtered, washed at 25 35 DEG C or so after mixing the regular hour.By the corrosion of oxidizing acid and can the effect of embedded ion make to obtain graphite material porous, that interlamellar spacing is larger, for fast charge negative electrode of lithium ion battery.Relative to other fast charge negative materials, present invention process flow is simple, at low cost, equipment is easily realized.There is the material of preparation interlamellar spacing increase, surface micropore to increase, and will not change the layer structure of material and have the migrating channels of increase lithium ion, the advantages of limiting lithium dendrite growth, reduce lithium ion mobility resistance under high current.
Description
Technical field
The invention belongs to lithium ion battery fast charge fields, are particularly useful for the cathode of the lithium ion battery of quick charge
Preparation method.
Background technology
With the development of information age, our rhythm of life becomes to be getting faster.The quick charge of battery is realized will
Many convenience can be brought.Therefore fast charging type lithium ion battery has obtained more and more concerns, especially with respect to electronic
Automobile.But realize that the quick charge of lithium ion battery is also faced with many problems, battery polarization is serious, and negative material is to restrict this
The key factor of one performance.Therefore it is the key that realize lithium ion battery quick charge to select and prepare suitable negative material.
Li4Ti5O12For spinel structure, lattice constant varies less, while volume change also very little (be less than 1%), is
A kind of good zero strain material, and be at present in fast charge without solid electrolyte interface film (SEI films) in cell operations
The material of most study in terms of lithium ion battery.But its platform voltage is relatively low, and capacity is small, and the energy for reducing battery system is close
Degree.Porous hard carbon has certain effect in terms of fast charge lithium ion battery applications, but manufacturing cost is higher.Graphite cathode cost
Low, platform is high, and energy density is big with bulk density, is still the most negative material of business application.Therefore, to graphite cathode material
Research is modified to be of great significance to meet fast charge condition.
But there are many problems, especially expansion of the lithium ion in graphite cathode for fast charge lithium ion battery for graphite material
Scattered rate is very low, makes the serious polarization of battery under large current charge state, is easier to analyse lithium in negative terminal surface.And by increasing stratiform
The interlamellar spacing of graphite material increases porosity, it is possible to increase the transmission channel of lithium ion reduces migration resistance, makees conducive to high current
With the fast transferring of lower lithium ion.The porous structure of negative terminal surface can effectively hinder the growth of Li dendrite simultaneously.Current pair can be fast
The graphite treatment method of speed charging is mainly KOH activation corrosions, mainly passes through KOH activatings specific surface areas high temperature sintering again
Method forms multi-channel structure, and making graphite layers, material internal generates nanometer micropore away from increase.The method treated graphite material
Material has preferable rapid charging performance.But the method reaction time is long, needs vacuum calcining, energy expenditure is larger, and the original selected
Expect that cost is higher.
Invention content
It is simple that the problem to be solved in the present invention is to provide a kind of flow, and low cost, equipment is simple, conducive to the available of industrialization
In the preparation method of the cathode of the lithium ion battery of quick charge.For this purpose, existing, the following technical solutions are proposed：
A kind of graphite cathode preparation method for quick charge lithium ion battery to graphite material oxidation corrosion and carries out
The processing of ion intercalation, making that treated, graphite material interlamellar spacing becomes larger, and has nanometer micropore to be formed.
Further improvement of these options, the preparation method of the graphite cathode for quick charge include following step
Suddenly：
Step 1)：A certain amount of graphite material is taken, the oxidisability mixed with certain proportion is put under the conditions of certain temperature
Acid solution reacts certain time with magnetic agitation in intercalation ion mixed salt solution；
Step 2)：Mixture after being reacted in step 1 is washed with weak caustic solution to neutrality, be washed with deionized,
Filtering, drying.
Further improvement of these options, the step 1) can also be：It is added in into oxidizing acid solution a certain amount of
Graphite material, in water-bath at a certain temperature magnetic agitation for a period of time after, add in embedded ion salting liquid solution, stirring
It is stood after mixing 3-8h.
Further improvement of these options, the embedded ion salting liquid described in step 1) be ionic radius be more than lithium from
Son neutrality or faintly acid alkali metal ion salt it is one or more.
Further improvement of these options, the embedded ion salting liquid are potassium nitrate solution, sodium nitrate solution, chlorination
Potassium solution, sodium chloride solution, solution of potassium carbonate, sodium carbonate liquor, sodium acetate solution, liquor kalii acetici it is one or more, it is excellent
Select one kind in potassium nitrate solution, Klorvess Liquid.
Further improvement of these options, the reaction temperature under oxidation environment described in step 1) are 10-40 DEG C, instead
It is 0.1-1 hours between seasonable.
Further improvement of these options, oxidizing acid solution and the mixing ratio of embedded ion salting liquid are in step 1)
The mass ratio of 0.1-0.5, graphite material and embedded ion salting liquid is 0.2-4.
Further improvement of these options, in step 2) alkalescent cleaning solution for alkali metal ion weak caustic solution or
NH4+The aqueous slkali of ion, preferably potassium hydroxide solution.
Compared with prior art, the beneficial effects of the present invention are：
(1) present invention handles lamellar graphite by the method that interlayer ion under acid corrosion and oxidative conditions is embedded in, and is used for
Fast charge lithium ion battery negative material.Lamellar graphite is placed in acidic mixed solution of a certain concentration with certain oxidisability,
Temperature is controlled to be filtered, washed after mixing the regular hour at 25-35 DEG C or so.By the corrosion of oxidizing acid and can be embedded in from
The effect of son makes to obtain graphite material porous, that interlamellar spacing is larger, so the migrating channels of increase lithium ion are made it have, limit
Lithium dendrite growth processed, reduce high current under lithium ion mobility resistance the advantages of, avoid due to Li dendrite pierce through diaphragm and cause
The risk of lithium ion battery short circuit is conducive to improve the safety of lithium ion battery.
(1) relative to other fast charge negative materials, the negative electrode of lithium ion battery prepared by the present invention does not include binding agent, makes
The proportion of negative material is higher；Due to not having the barrier of megohmite insulant between negative material, negative electrode of lithium ion battery is whole to lead
Electrically also can accordingly it be improved；And the preparation method of negative electrode of lithium ion battery provided by the present invention is easy to operate, cost
It is relatively low.Preparation flow is simple, raw material is cheap, at low cost, and equipment is simple, treated material.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, with reference to
Specific embodiment, the present invention is further explained.
Embodiment 1
The present embodiment provides a kind of graphite cathode cathode preparation method for quick charge lithium ion battery, including as follows
Step：
(1) dilute nitric acid solution of 40ml a concentration of 10% is prepared as oxidant and corrosive agent, and it is a concentration of to add in 20ml
20% potassium nitrate solution after two kinds of solution are sufficiently mixed, adds in the graphite material of 40g, magnetic agitation in 30 DEG C of water-baths
0.5h；
(2) by step 1 react after mixture filtering after first washed with potassium hydroxide solution to neutrality after spend again from
The porous expansible graphite of target product is obtained after sub- water washing, filtering, drying.
Embodiment 2
The present embodiment provides a kind of graphite cathode cathode preparation method for quick charge lithium ion battery, including as follows
Step：
(1) dilute nitric acid solution of 40ml a concentration of 10% is prepared as oxidant and corrosive agent, adds in the graphite material of 40g
Expect, in 30 DEG C of water-baths after magnetic agitation 0.5h, then add in the solution of potassium carbonate of 20ml a concentration of 20% thereto, stirring is mixed
It is stood after closing 3-8h；
(2) by step 1 react after mixture filtering after first washed with potassium hydroxide solution to neutrality after spend again from
The porous expansible graphite of target product is obtained after sub- water washing, filtering, drying.
Embodiment 3
The present embodiment provides a kind of graphite cathode cathode preparation method for quick charge lithium ion battery, including as follows
Step：
(1) dilute hydrochloric acid solution of 40ml a concentration of 10% is prepared as corrosive agent, and adds in 5ml hydrogen peroxide as oxidation
Agent, the potassium nitrate solution of 20ml a concentration of 20% after solution is sufficiently mixed uniformly, are added with providing the intercalating ions of graphite material
Enter the graphite material of 40g, magnetic agitation 0.5h in 30 DEG C of water-baths；
(2) by step 1 react after mixture filtering after first be washed with deionized again after ammonia scrubbing to neutrality,
The porous expansible graphite of target product is obtained after filtering, drying.
Embodiment 4
The present embodiment provides a kind of graphite cathode cathode preparation method for quick charge lithium ion battery, including as follows
Step：
(1) dilute hydrochloric acid solution of 40ml a concentration of 10% is prepared as corrosive agent, and adds in 5ml hydrogen peroxide as oxidation
Solution, is sufficiently mixed the graphite material for uniformly, adding in 40g by agent, in 30 DEG C of water-baths after magnetic agitation 0.5h, then 20ml concentration
Potassium nitrate solution for 20% is stood with providing the intercalating ions of graphite material after stirring 3-8h in water-bath；
(2) by step 1 react after mixture filtering after first washed with the aqueous slkali of ammonium hydroxide to neutrality after spend again from
The porous expansible graphite of target product is obtained after sub- water washing, filtering, drying.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will be all fallen in scope of the presently claimed invention.
Claims (8)
1. a kind of graphite cathode preparation method for quick charge lithium ion battery, it is characterised in that：Graphite material is aoxidized
Corrode and carry out embedded processing between sheath, making that treated, graphite material interlamellar spacing becomes larger, and has nanometer micropore to be formed.
2. the graphite cathode preparation method according to claim 1 for quick charge lithium ion battery, which is characterized in that
Preparation method includes the following steps：
Step 1)：A certain amount of graphite material is taken, it is molten that the oxidizing acid mixed with certain proportion is put under the conditions of certain temperature
Liquid reacts certain time with magnetic agitation in intercalation ion mixed salt solution；
Step 2)：Mixture after being reacted in step 1 is washed with weak caustic solution to neutrality, be washed with deionized, filter,
It is dry.
3. a kind of graphite cathode preparation method for quick charge lithium ion battery according to claim 1, feature
It is：The step 1) can also be：A certain amount of graphite material is added in into oxidizing acid solution, water-bath at a certain temperature
Pot in magnetic agitation for a period of time after, add in embedded ion salting liquid solution, stood after being stirred 3-8h.
4. a kind of graphite cathode preparation method for quick charge lithium ion battery according to Claims 2 or 3, special
Sign is：Embedded ion salting liquid described in step 1) be ionic radius be more than lithium ion neutrality or faintly acid alkali metal from
Alite it is one or more.
5. a kind of graphite cathode preparation method for quick charge lithium ion battery according to claim 4, feature
It is：The embedded ion salting liquid is potassium nitrate solution, sodium nitrate solution, Klorvess Liquid, sodium chloride solution, potassium carbonate are molten
Liquid, sodium carbonate liquor, sodium acetate solution, liquor kalii acetici it is one or more, preferably in potassium nitrate solution, Klorvess Liquid
It is a kind of.
6. the graphite cathode preparation method for quick charge lithium ion battery according to Claims 2 or 3, feature exist
In：The reaction temperature under oxidation environment described in step 1) is 10-40 DEG C, and the magnetic agitation time is 0.1-1 hours.
7. the graphite cathode preparation method for quick charge lithium ion battery according to Claims 2 or 3, feature exist
In：The mixing ratio of oxidizing acid solution and embedded ion salting liquid is 0.1-0.5, graphite material and embedded ion salt in step 1)
The mass ratio of solution is 0.2-4.
8. the graphite cathode preparation method according to claim 2 for quick charge lithium ion battery, it is characterised in that：
Alkalescent cleaning solution is the weak caustic solution or NH4 of alkali metal ion in step 2)+The aqueous slkali of ion, preferably potassium hydroxide are molten
Liquid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017551.7A CN108217640B (en) | 2018-01-09 | 2018-01-09 | Preparation method of negative electrode of lithium ion battery capable of being used for quick charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017551.7A CN108217640B (en) | 2018-01-09 | 2018-01-09 | Preparation method of negative electrode of lithium ion battery capable of being used for quick charging |
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| CN108217640B CN108217640B (en) | 2021-03-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974114A (en) * | 2023-03-18 | 2023-04-18 | 河北坤天新能源股份有限公司 | Quick-filling graphite composite material and preparation method thereof |
| CN116281996A (en) * | 2023-03-27 | 2023-06-23 | 青岛洛唯新材料有限公司 | Preparation method of high-interlayer-spacing graphite, negative electrode and lithium battery |
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