CN107785537A - A kind of method of modifying of new type lithium ion battery anode pole piece, its purposes and pole piece - Google Patents
A kind of method of modifying of new type lithium ion battery anode pole piece, its purposes and pole piece Download PDFInfo
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Abstract
The invention discloses the method for modifying of a kind of new type lithium ion battery anode pole piece, its purposes and pole piece, this method includes:Step 1, modification pole piece is prepared:Slurry containing the first material is formed into first coating coated in aluminium foil side, drying, obtains modifying pole piece;Step 2, second coating will be formed in first coating of the slurry containing positive electrode active materials coated in above-mentioned modification pole piece, dried, obtain lithium ion battery modification anode pole piece;Wherein, the working voltage platform of first material is less than positive electrode active materials.The method of modifying is easy to operate, has universality, is easy to industrialize.The lithium ion battery assembled using the modification anode pole piece of the present invention can shorten the transmission path of lithium ion/electronics in charge and discharge process, reduce interface impedance, bring higher efficiency for charge-discharge, specific discharge capacity and excellent high rate performance.
Description
Technical field
The invention belongs to electrochemical field, is related to a kind of anode preparation method, more particularly to a kind of to lithium-ion electric
The method that pond anode pole piece is modified.
Background technology
With the development of economy and society, energy shortage turns into the Tough questions that world community faces, and this promotes the mankind
Constantly seek the novel environment friendly energy.Compared with traditional cadmium nickel, Ni-H cell, lithium ion battery has, work electricity higher than energy
Pressure is high, temperature limit is wide, self-discharge rate is low, the advantages that having extended cycle life, and is widely used in mobile phone, notebook electricity
Brain and other portable electronics, and progressively to high-power system such as electric automobile, intelligent grid, satellite and distributed energy system
The fields such as system are expanded.
From the point of view of current development situation, countries in the world also all propose middle length to high-energy-density chemical energy storage power supply
Phase development plan, such as NASA(National Aeronautics and Space Administration, American National boat
Empty and space travel office)It is true all by the ratio energy object of recent lithium ion battery with battery manufacturers Saft companies of Air France Group etc.
It is set to 250 ~ 300 Wh/kg, Japanese NEDO(The New Energy and Industrial Technology
Development Organization, New Energy and Industrial Technology Development Organization)Power battery of electric vehicle develops
The energy density of the year two thousand twenty energy type lithium ion battery is also illustrated that in planning will reach 250Wh/kg.
However, the energy density of lithium ion battery is primarily limited to positive electrode, because commercial carbon material used as anode specific volume
Measure in 300 ~ 350 mAh/g or so, and common positive electrode(Including LiCoO2、LiNiO2, spinel-type LiMn2O4, stratiform
LiMnO2、LiFePO4、Li[Ni1/3Co1/3Mn1/3]O2Deng)Specific capacity be 120 ~ 165 mAh/g, far below the reason of negative material
By capacity.
With the continuous social and economic development with the rapid emergence of other industries, market still needs with higher performance
Accumulation power supply appears on the market, and the selection of electrode material is to determine the key point of its performance in accumulation power supply.Positive pole in electrode material
Material and the uneven serious rapid development for limiting high-energy-density accumulation power supply of extreme of negative material capacity development, therefore from
The preparation of material, the optimization of material, battery design, preparation technology angularly start with, and develop with higher capacity, more dominance energy
Anode material for lithium-ion batteries it is most important.
The content of the invention
Present invention aim to address routine lithium ion anode material specific capacity it is low the problem of, to lithium ion battery
Positive electrode is modified modification, improves the chemical property of anode material for lithium-ion batteries, such as efficiency for charge-discharge, electric discharge specific volume
Amount and high rate performance.
In order to achieve the above object, the invention provides a kind of new type lithium ion battery anode pole piece method of modifying, the party
Method comprises the steps of:
Step 1, modification pole piece is prepared:Slurry containing the first material is formed into first coating coated in aluminium foil side, drying, obtained
To modification pole piece;
Step 2, second coating will be formed in first coating of the slurry containing positive electrode active materials coated in above-mentioned modification pole piece,
Drying, obtain lithium ion battery modification anode pole piece;
Wherein, the working voltage platform of first material is less than positive electrode active materials.
It is preferred that described the first material selection graphene, sulphur simple substance, cobalt acid lithium, LiFePO 4, LiMn2O4, nickel cobalt
Any one in LiMn2O4, nickel cobalt lithium aluminate or two or more mixtures.
It is preferred that described positive electrode active materials selection cobalt acid lithium, LiFePO 4, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt
Any one in lithium aluminate, lithium-rich manganese base material, nickel ion doped or two or more mixtures.
It is preferred that the thickness of first coating is 1 μm ~ 10 μm.
It is preferred that the thickness of second coating is 10 μm ~ 100 μm.
Present invention also offers anode slice of lithium ion battery prepared by a kind of above-mentioned method of modifying, the anode pole piece bag
Containing collector, the collector is formed by aluminium foil and coated in the first coating of its side, and the is also coated with first coating
Two coatings, the first coating include the first material, and the second coating includes active material, wherein, the work of the first material
Voltage platform is less than positive electrode active materials.
A kind of purposes of the anode slice of lithium ion battery prepared present invention also offers above-mentioned method of modifying, wherein,
The anode pole piece is used for lithium ion battery.
The present invention has advantages below:Using the lithium ion battery of present invention modification anode pole piece assembling in charge and discharge process
Can shorten the transmission path of lithium ion/electronics, reduce interface impedance, bring higher efficiency for charge-discharge, specific discharge capacity with
And excellent high rate performance.For example, the specific discharge capacity using the nickel cobalt aluminic acid lithium electrode of LiFePO4 modified in 0.1C
Up to 194.6mAh/g, and ungroomed electrode discharge specific capacity only has 184.6mAh/g;Electric discharge of the modified electrode in 5C
Specific capacity is up to 150.2mAh/g, and ungroomed electrode discharge specific capacity only has 136.2mAh/g.The lithium ion battery is just
Pole pole piece method of modifying has universality, also is adapted for engineering application.
Brief description of the drawings
Fig. 1 is using first charge and discharge of the modification pole piece prepared by the embodiment of the present invention 1 as the lithium ion battery of positive pole
Electric curve.
Fig. 2 is using high rate performance of the modification pole piece prepared by the embodiment of the present invention 1 as the lithium ion battery of positive pole
Curve.
Fig. 3 is as the resistance before the lithium ion battery circulation of positive pole using the modification pole piece prepared by the embodiment of the present invention 1
Anti- curve.
Fig. 4 is using first charge and discharge of the modification pole piece prepared by the embodiment of the present invention 2 as the lithium ion battery of positive pole
Electric curve.
Fig. 5 is the SEM scanning electron microscope (SEM) photographs of the modification anode pole piece prepared by the embodiment of the present invention 3.
Fig. 6 is using first charge and discharge of the modification pole piece prepared by the embodiment of the present invention 3 as the lithium ion battery of positive pole
Electric curve.
Fig. 7 is using first charge and discharge of the modification pole piece prepared by the embodiment of the present invention 4 as the lithium ion battery of positive pole
Electric curve.
Embodiment
A kind of new type lithium ion battery anode pole piece method of modifying provided by the invention comprises the steps of:
Step 1, modification pole piece is prepared:Slurry containing the first material is formed into first coating coated in aluminium foil side, drying, obtained
To modification pole piece;
Step 2, second coating will be formed in first coating of the slurry containing positive electrode active materials coated in above-mentioned modification pole piece,
Drying, obtain lithium ion battery modification anode pole piece;
Wherein, the working voltage platform of first material is less than positive electrode active materials.
Described first material selection graphene, sulphur simple substance, cobalt acid lithium, LiFePO 4, LiMn2O4, nickle cobalt lithium manganate,
Any one in nickel cobalt lithium aluminate or two or more mixtures.
Described positive electrode active materials selection cobalt acid lithium, LiFePO 4, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt lithium aluminate,
Any one in lithium-rich manganese base material, nickel ion doped or two or more mixtures.
The thickness of the first coating is 1 μm ~ 10 μm.
The thickness of the second coating is 10 μm ~ 100 μm.
Described the first material and the usage ratio of positive electrode active materials are by adjusting the thickness of first coating and second coating
Degree is realized.
Technical scheme is described further below in conjunction with drawings and examples.
Embodiment 1
(1)It is 8 in mass ratio:1:1 weighs LiFePO 4 material (LiFePO4, LFP), conductive agent and binding agent, with NMP
(N-Methyl pyrrolidone, 1-METHYLPYRROLIDONE)As solvent wet-mixing, coated on aluminium foil, obtained after drying
Contain the pole piece of low-voltage positive electrode as modification pole piece in aluminium foil side;The conductive agent is acetylene black, and the binding agent is
PVDF(Polyvinylidene Fluoride, Kynoar);
(2)It is 8 in mass ratio:1:1 weighs positive electrode active materials nickel cobalt lithium aluminate (LiNi0.8Co0.15Al0.05O2, NCA), lead
Electric agent and binding agent, using NMP as solvent wet-mixing after obtain anode sizing agent;
(3)With step(1)Manufactured modification pole piece coats one layer of step as collector on its surface(2)Manufactured positive pole slurry
Material, lithium ion battery modification anode pole piece Al-LFP-NCA is obtained after drying.
Wherein, the coating of low-voltage positive electrode is contained in aluminium foil side, and thickness is 5 μm.
The coating of positive electrode active materials, thickness are 50 μm.
Using first charge-discharge curve such as figure of the modification pole piece prepared by the present embodiment 1 as the lithium ion battery of positive pole
Shown in 1, discharge and recharge is carried out with 0.1C electric current, it can be seen that using its first Zhou Fang electricity ratio of the battery of Al-LFP-NCA modification positive poles
Capacity is 194.6mAh/g, higher than the 184.6mAh/g of the unmodified electrodes of Al-NCA.Using its storehouse first of the battery of modification positive pole
Logical sequence efficiency is 85.0%, higher than the 81.6% of unmodified electrode.
Using the high rate performance curve such as Fig. 2 of modification pole piece as the lithium ion battery of positive pole prepared by the present embodiment 1
It is shown, it can be seen that using the battery of Al-LFP-NCA modification positive poles under the big multiplying power electric currents of 5C, its specific discharge capacity
150.2mAh/g, higher than the 136.2mAh/g of the unmodified electrodes of Al-NCA.
Using the modification pole piece prepared by the present embodiment 1 as impedance diagram such as Fig. 3 before the lithium ion battery circulation of positive pole
It is shown, it can be seen that to there is smaller impedance value using the Al-LFP-NCA batteries for modifying positive pole, advantageously in ion and electricity
The transmission of son.
Embodiment 2
(1)It is 8 in mass ratio:1:1 weighs grapheme material (grapheme, GR), conductive agent and binding agent, using NMP as
Solvent wet-mixing, coated in the pole piece for obtaining containing low-voltage positive electrode in aluminium foil side on aluminium foil, after drying as modification
Pole piece;The conductive agent is acetylene black, and the binding agent is that PVDF is Kynoar;
(2)It is 8 in mass ratio:1:1 weighs positive electrode active materials nickel cobalt lithium aluminate (LiNi0.8Co0.15Al0.05O2, NCA), it is conductive
Agent and binding agent, using NMP as solvent wet-mixing after obtain anode sizing agent;
(3)With step(1)Manufactured modification pole piece coats one layer of step as collector on its surface(2)Manufactured positive pole slurry
Material, lithium ion battery modification anode pole piece Al-GR-NCA is obtained after drying.
The coating of low-voltage positive electrode is contained in aluminium foil side, and thickness is 5 μm.
The coating of positive electrode active materials, thickness are 50 μm.
Lithium ion battery modification anode pole piece Al-GR-NCA electrochemical property test result is as shown in figure 4, with 0.1C
Electric current carry out discharge and recharge, it can be seen that use battery its specific discharge capacity of Al-GR-NCA modification positive poles as 197.6mAh/g,
Higher than the 184.6mAh/g of the unmodified electrodes of Al-NCA.Meanwhile the battery of Al-GR-NCA modification positive poles, under 2C multiplying powers, it is put
Electric specific capacity 165.7mAh/g, higher than the 148.7mAh/g of the unmodified electrodes of Al-NCA.This kind of pole piece method of modifying makes raw material
Volumetric properties and high rate performance all be improved significantly.
Embodiment 3
(1)It is 8 in mass ratio:1:1 weighs sulfur materials (S), conductive agent and binding agent, using NMP as solvent wet-mixing, applies
Apply on aluminium foil, the pole piece for obtaining containing low-voltage positive electrode in aluminium foil side after drying is as modification pole piece;The conductive agent
For acetylene black, the binding agent is that PVDF is Kynoar;
(2)It is 8 in mass ratio:1:1 weighs iron phosphate serving as positive active material (LiFePO4, LFP), conductive agent and bonding
Agent, using NMP as solvent wet-mixing after obtain anode sizing agent;
(3)With step(1)Manufactured modification pole piece coats one layer of step as collector on its surface(2)Manufactured positive pole slurry
Material, lithium ion battery modification anode pole piece Al-S-LFP is obtained after drying.
The coating of low-voltage positive electrode is contained in aluminium foil side, and thickness is 5 μm.
The coating of positive electrode active materials, thickness are 100 μm.
SEM figures using the modification anode pole piece prepared by the present embodiment 3 are as shown in Figure 5, it can be seen that short grained phosphorus
Sour iron lithium active material is covered in sulfur materials surface.
Using first charge-discharge curve such as figure of the modification pole piece prepared by the present embodiment 3 as the lithium ion battery of positive pole
Shown in 6, discharge and recharge is carried out with 0.1C electric current, use its first discharge specific capacities of battery of Al-S-LFP modification positive poles for
247.2mAh/g。
Embodiment 4:
(1)By 8:1:1 weighs LiFePO 4 material (LiFePO4, LFP), conductive agent and binding agent, it is wet using NMP as solvent
Method mixes, coated in the pole piece for obtaining containing low-voltage positive electrode in aluminium foil side on aluminium foil, after drying as modification pole piece;Institute
It is acetylene black to state conductive agent, and the binding agent is that PVDF is Kynoar;
(2)By 8:1:1 weighs positive electrode active materials nickel cobalt lithium aluminate (LiNi0.8Co0.15Al0.05O2, NCA), conductive agent and
Binding agent, using NMP as solvent wet-mixing after obtain anode sizing agent;
(3)With step(1)Manufactured modification pole piece coats one layer of step as collector on its surface(2)Manufactured positive pole slurry
Material, lithium ion battery modification anode pole piece Al-LFP-NCA is obtained after drying.
The coating of low-voltage positive electrode is contained in aluminium foil side, and thickness is 2 μm.
The coating of positive electrode active materials, thickness are 10 μm.
Lithium ion battery modification anode pole piece Al-LFP-NCA electrochemical property test result as shown in fig. 7, with
0.1C electric current carries out discharge and recharge, it can be seen that use its specific discharge capacities of battery of Al-LFP-NCA modification positive poles for
190.6mAh/g, higher than the 184.6mAh/g of the unmodified electrodes of Al-NCA.
In summary, anode slice of lithium ion battery method of modifying provided by the invention, by working voltage platform less than just
The low voltage material of pole active material is coated on aluminium foil, using the modification pole piece as collector, then in one layer of its surface coating
Anode active material of lithium ion battery.Using lithium ion battery the depositing due to ladder potential of present invention modification anode pole piece assembling
It can shorten the transmission path of lithium ion/electronics in charge and discharge process, reduce interface impedance, bring higher discharge and recharge to imitate
Rate, specific discharge capacity and excellent high rate performance.The capacity through modified electrode and first effect that each embodiment obtains will be higher than
The electrode capacity modified and first effect are not done, and thus provable, the present invention is effectively improved the electrochemistry of lithium ion cell positive
Performance.
In addition, the anode slice of lithium ion battery method of modifying has universality, preparation method is simple, is adapted to engineering should
With.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (9)
1. a kind of new type lithium ion battery anode pole piece method of modifying, it is characterised in that the method includes the steps of:
Step 1, modification pole piece is prepared:Slurry containing the first material is formed into first coating coated in aluminium foil side, drying, obtained
To modification pole piece;
Step 2, second coating will be formed in first coating of the slurry containing positive electrode active materials coated in above-mentioned modification pole piece,
Drying, obtain lithium ion battery modification anode pole piece;
Wherein, the working voltage platform of first material is less than positive electrode active materials.
2. new type lithium ion battery anode pole piece method of modifying as claimed in claim 1, it is characterised in that the first described material
It is any one in material selection graphene, sulphur simple substance, cobalt acid lithium, LiFePO 4, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt lithium aluminate
Kind or two or more mixtures.
3. new type lithium ion battery anode pole piece method of modifying as claimed in claim 1, it is characterised in that described positive pole is lived
Property material selection cobalt acid lithium, LiFePO 4, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt lithium aluminate, lithium-rich manganese base material, nickel mangaic acid
Any one in lithium or two or more mixtures.
4. new type lithium ion battery anode pole piece method of modifying as claimed in claim 1, it is characterised in that the thickness of first coating
Spend for 1 μm ~ 10 μm.
5. new type lithium ion battery anode pole piece method of modifying as claimed in claim 1, it is characterised in that the thickness of second coating
Spend for 10 μm ~ 100 μm.
6. anode slice of lithium ion battery prepared by the method for modifying in a kind of 1-5 according to claim described in any one, its
It is characterised by, the anode pole piece includes collector, and the collector is made up of aluminium foil and the first coating coated in its side,
Second coating is also coated with first coating, the first coating includes the first material, and the second coating includes active material,
Wherein, the working voltage platform of the first material is less than positive electrode active materials.
7. anode slice of lithium ion battery as claimed in claim 6, it is characterised in that described the first material selection graphite
Any one or two kinds in alkene, sulphur simple substance, cobalt acid lithium, LiFePO 4, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt lithium aluminate with
On mixture.
8. anode slice of lithium ion battery as claimed in claim 6, it is characterised in that described positive electrode active materials selection cobalt
It is any one in sour lithium, LiFePO 4, LiMn2O4, nickle cobalt lithium manganate, nickel cobalt lithium aluminate, lithium-rich manganese base material, nickel ion doped
Kind or two or more mixtures.
9. the use of anode slice of lithium ion battery prepared by the method for modifying in a kind of 1-5 according to claim described in any one
On the way, it is characterised in that the anode pole piece is used for lithium ion battery.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109560249A (en) * | 2018-11-30 | 2019-04-02 | 中国科学院过程工程研究所 | A kind of double-layer structure anode pole piece, and its preparation method and application |
CN111554879A (en) * | 2020-05-11 | 2020-08-18 | 珠海冠宇电池股份有限公司 | Positive plate, manufacturing method of positive plate and battery |
CN112751074A (en) * | 2019-10-29 | 2021-05-04 | 北京小米移动软件有限公司 | Lithium ion battery, preparation method thereof and electronic equipment |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1658413A (en) * | 2004-02-17 | 2005-08-24 | 比亚迪股份有限公司 | Lithium cell plus plate and its preparation method and lithium ion secondary battery |
CN201153140Y (en) * | 2008-02-20 | 2008-11-19 | 东莞市迈科新能源有限公司 | High-safety polymer battery positive pole |
CN102208598A (en) * | 2011-05-12 | 2011-10-05 | 中国科学院宁波材料技术与工程研究所 | Electrode plate of graphene coating modified lithium secondary battery and manufacturing method thereof |
CN103378352A (en) * | 2012-04-25 | 2013-10-30 | 协鑫动力新材料(盐城)有限公司 | Lithium ion battery positive pole piece and preparation method thereof |
CN203746972U (en) * | 2014-01-03 | 2014-07-30 | 邓韵 | Positive electrode plate |
CN103972464A (en) * | 2013-01-24 | 2014-08-06 | 华为技术有限公司 | Positive electrode of all-solid-state lithium battery and manufacturing method thereof, and all-solid-state lithium battery |
CN104600242A (en) * | 2014-12-26 | 2015-05-06 | 深圳市贝特瑞新能源材料股份有限公司 | Lithium ion battery composite positive material, positive plate and lithium ion battery |
CN105591073A (en) * | 2014-10-23 | 2016-05-18 | 深圳华粤宝电池有限公司 | A cathode material used for secondary lithium batteries and a preparing method thereof |
CN106560943A (en) * | 2016-08-17 | 2017-04-12 | 深圳市优特利电源有限公司 | Silicon-carbon negative electrode and preparation method thereof, and lithium ion battery |
CN106654169A (en) * | 2016-12-31 | 2017-05-10 | 山东精工电子科技有限公司 | Positive electrode plate of lithium ion battery and preparation method for positive electrode plate |
CN106848326A (en) * | 2017-02-15 | 2017-06-13 | 深圳市沃特玛电池有限公司 | Anode pole piece and lithium ion battery |
CN107112143A (en) * | 2014-11-14 | 2017-08-29 | 牛津大学科技创新有限公司 | Electrode structure and its manufacture method |
-
2017
- 2017-08-31 CN CN201710771251.3A patent/CN107785537B/en active Active
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1658413A (en) * | 2004-02-17 | 2005-08-24 | 比亚迪股份有限公司 | Lithium cell plus plate and its preparation method and lithium ion secondary battery |
CN201153140Y (en) * | 2008-02-20 | 2008-11-19 | 东莞市迈科新能源有限公司 | High-safety polymer battery positive pole |
CN102208598A (en) * | 2011-05-12 | 2011-10-05 | 中国科学院宁波材料技术与工程研究所 | Electrode plate of graphene coating modified lithium secondary battery and manufacturing method thereof |
CN103378352A (en) * | 2012-04-25 | 2013-10-30 | 协鑫动力新材料(盐城)有限公司 | Lithium ion battery positive pole piece and preparation method thereof |
CN103972464A (en) * | 2013-01-24 | 2014-08-06 | 华为技术有限公司 | Positive electrode of all-solid-state lithium battery and manufacturing method thereof, and all-solid-state lithium battery |
CN203746972U (en) * | 2014-01-03 | 2014-07-30 | 邓韵 | Positive electrode plate |
CN105591073A (en) * | 2014-10-23 | 2016-05-18 | 深圳华粤宝电池有限公司 | A cathode material used for secondary lithium batteries and a preparing method thereof |
CN107112143A (en) * | 2014-11-14 | 2017-08-29 | 牛津大学科技创新有限公司 | Electrode structure and its manufacture method |
CN104600242A (en) * | 2014-12-26 | 2015-05-06 | 深圳市贝特瑞新能源材料股份有限公司 | Lithium ion battery composite positive material, positive plate and lithium ion battery |
CN106560943A (en) * | 2016-08-17 | 2017-04-12 | 深圳市优特利电源有限公司 | Silicon-carbon negative electrode and preparation method thereof, and lithium ion battery |
CN106654169A (en) * | 2016-12-31 | 2017-05-10 | 山东精工电子科技有限公司 | Positive electrode plate of lithium ion battery and preparation method for positive electrode plate |
CN106848326A (en) * | 2017-02-15 | 2017-06-13 | 深圳市沃特玛电池有限公司 | Anode pole piece and lithium ion battery |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109560249A (en) * | 2018-11-30 | 2019-04-02 | 中国科学院过程工程研究所 | A kind of double-layer structure anode pole piece, and its preparation method and application |
CN112751074A (en) * | 2019-10-29 | 2021-05-04 | 北京小米移动软件有限公司 | Lithium ion battery, preparation method thereof and electronic equipment |
CN111554879A (en) * | 2020-05-11 | 2020-08-18 | 珠海冠宇电池股份有限公司 | Positive plate, manufacturing method of positive plate and battery |
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