CN108511747A - A kind of method of the nickelic ternary anode material of lithium battery of fiber inhibition nickel lithium mixing - Google Patents
A kind of method of the nickelic ternary anode material of lithium battery of fiber inhibition nickel lithium mixing Download PDFInfo
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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Abstract
The present invention relates to a kind of methods that fiber inhibits the nickelic ternary anode material of lithium battery of nickel lithium mixing, belong to positive electrode field.A kind of preparation method of the nickelic ternary anode material of lithium battery of fiber inhibition nickel lithium mixing, includes the following steps：Chitosan powder is dissolved in aqueous acetic acid, addition polyvinyl alcohol, polyvinylpyrrolidone are uniformly dispersed, and obtain spinning solution;Hollow porous fiber is obtained using coaxial electrostatic spinning；Nickel source, cobalt source and manganese source is added in hollow porous fiber, is placed into acetone, after taking out drying, obtains the organic fiber of metal ion load；It will be mixed with powdered lithium source after the organic fiber grinding of metal ion load, nickelic ternary anode material of lithium battery obtained through sintering.Ternary anode material of lithium battery prepared by the present invention solves the problems, such as that the nickelic tertiary cathode material nickel lithium mixing of tradition is serious, while one-dimentional structure can improve the charge-discharge performance of material.
Description
Technical field
The present invention relates to a kind of methods that fiber inhibits the nickelic ternary anode material of lithium battery of nickel lithium mixing, belong to anode
Material Field.
Background technology
Current commercialized power-type lithium ion battery is mainly cobalt acid lithium, LiMn2O4, LiFePO4 and nickel-cobalt-manganese ternary
Battery.Power battery requires battery to have higher energy density（Corresponding high continuation of the journey distance）And high security, and cobalt acid lithium because
It is worst for its own stable property of heat（Safety is poor）, it is not suitable for power battery scope（But it relies on high compacted density and energy is close
Degree is 3C scopes mainstream now）, and LiMn2O4 energy density is relatively low using limited, LiFePO4 as the technical ability more early developed,
Advantage is that safety is fabulous, environmentally friendly, cycle longevity number is high, but defect is that energy density is relatively low and has got close to arrival ceiling,
And ternary itself has the advantage of the high-energy density upper limit, future that technical ability is followed to be continuously advanced, safety issue gradually improves,
Other battery technical ability are not implemented before important breakthrough, and ternary is currently still the optimal choosing of power battery scope.
Study on the modification for ternary battery is the mainstream of existing market, using high ni-type ternary battery as core direction.It is high
Since nickel content is higher, battery capacity further increases ni-type ternary battery, but the nickel lithium mixing phenomenon brought therewith and not
Stability is more obvious.
Application No. is 201710587901.9 Chinese patents to disclose a kind of method improving tertiary cathode material performance.
Improving the method for tertiary cathode material performance the invention discloses a kind of, including produces carbon black modified molybdenum sulphur modification object and use
Molybdenum sulphur modification object carries out coating modification to tertiary cathode material.Tertiary cathode material surface is wrapped using molybdenum sulphur modification object
It covers, there is molybdenum sulphur modification object preferable cyclical stability, molybdenum sulphur modification object stable structure in the electrolytic solution can prevent electrolyte
Corrosion to electrode prevents the generation of side reaction in electrode, inhibits the phenomenon that nickel lithium mixing in electrode, and it is remaining to reduce electrode surface
Lithium content, stablize the layer structure of tertiary cathode material, lithium ion can steadily be embedded in, deviate from, and improve tertiary cathode
The cyclical stability of material, and ensure giving full play to for its chemical property.
Application No. is 201710422028.8 Chinese patents to disclose a kind of micro blending ternary of use LiFePO4 just
Pole material positive plate and preparation method thereof, power lithium-ion battery.The present invention provides a kind of using the micro blending of LiFePO4 three
First positive electrode positive plate and preparation method thereof, power lithium-ion battery, using the micro blending tertiary cathode material of LiFePO4
Positive plate includes positive electrode and collector, and the positive electrode includes positive electrode active materials, positive conductive agent, anode bonding
Agent, the tertiary cathode material and LiFePO4 and positive conductive agent, positive electrode binder and the evenly dispersed stirring of positive solvent are mixed
Conjunction forms anode sizing agent, and the mass ratio that wherein LiFePO4 accounts for entire positive electrode active materials is 0.1%-15%.Additionally provide one
The preparation method of the above-mentioned positive plate of kind and the power lithium-ion battery using the positive plate.It is abused in battery in the present invention
Test and when partial short-circuit, thermal stability improves, and in positive plate after micro blending LiFePO4, the conductivity of pole piece significantly carries
It rises, anode pole piece resistance is reduced rapidly, and pole piece heat production is drastically reduced in short-circuit process, thus has been obviously improved the safety of battery
Energy.
Application No. is 201710821234.6 Chinese patents to disclose a kind of tertiary cathode material preparation method and ternary
Positive electrode.The invention discloses a kind of tertiary cathode material preparation method and tertiary cathode materials, are synthesized with itrogenous organic substance
Then reticulated carbon, nitrogen, hydrogen compound pass through high-temperature process and synthesize nitrogen-doped carbon compound, this compound is uniformly coated on
Tertiary cathode material surface greatly improves times of tertiary cathode material using the electric conductivity that nitrogen-doped carbon material is excellent
Rate performance.
Application No. is 201510072338.2 Chinese patent LiCoO2The preparation method of coating modification tertiary cathode material.
The present invention relates to a kind of preparation methods of anode material for lithium-ion batteries.This approach includes the following steps：1）By ternary precursor
It is ground to 500nm grades of grain size；2）By presoma pre-burning；3）Presoma is mixed with LiOH, is sintered, 523 tertiary cathode materials are prepared
Material；4）By 523 tertiary cathode materials and La（NO3）3And Mg (OH)2Mixing, sintering, the positive electrode adulterated；5）By upper one
The material and Co that step obtains3O4、Li2CO3Mixed sintering obtains LiCoO2The tertiary cathode material of cladding.The present invention improves
The discharge performance of ternary material, cycle performance under the conditions of high voltage 4.6V are apparently higher than common tertiary cathode material.
Can be seen that at present from above-mentioned patent is mostly doping and cladding for the solution of nickel lithium mixing, it is difficult into
One step effectively reduces its nickel lithium mixing phenomenon, in addition the fine degree of preparation process is higher, the volume production state of high ni-type ternary battery
Inside not yet fully achieve.Therefore advanced optimize and improve tool for distinctive nickel lithium mixing phenomenon in high ni-type ternary battery
There is highly important practical significance.
Invention content
For disadvantages described above, the object of the present invention is to provide a kind of fibers to inhibit the nickelic ternary lithium battery of nickel lithium mixing just
The method of pole material.
A kind of preparation method of the nickelic ternary anode material of lithium battery of fiber inhibition nickel lithium mixing, preparation method include
Following steps：
A, Chitosan powder is dissolved in aqueous acetic acid, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, is warming up to 80
~100 DEG C are stirred 3~5 hours, add polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic
Spinning obtains hollow porous organic fiber；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, subsequent ultrasound 20~
It 40 minutes, places into acetone and impregnates 30~50 minutes, after taking out drying, obtain the organic fiber of metal ion load；
C, it will be mixed with powdered lithium source after the organic fiber grinding of metal ion load, nickelic ternary lithium battery obtained through sintering
Positive electrode.
A kind of fiber prepared by the present invention inhibits the nickelic ternary anode material of lithium battery of nickel lithium mixing, by hollow porous
The organic phase adsorbing metal ions of fibre structure form metal-organic load, lithium ion and nickel ion are fixed on fibre respectively
Different location inside one-dimensional tubular layer is tieed up, by the nickelic tertiary cathode for obtaining low cationic mixing after sintering removal fibrous template
Material.While the one-dimensional tubular porous structure of fiber can effectively reduce the transmission path of lithium ion and provide more transmission and lead to
Road.
The present invention carries out spinning using coaxial electrostatic spinning technology, and doughnut is made.Use polyvinylpyrrolidone for
Hollow porous fiber is made in pore-foaming agent.
Polyvinylpyrrolidone abbreviation PVP, is a kind of non-ionic macromolecule compound, is N- vinylamide Type of Collective
It is most characteristic in object, and it is studied most deep, extensive fine chemicals kind.Have evolved into nonionic, cation, it is cloudy from
Sub 3 major class, 3 kinds of technical grade, pharmaceutical grade, food-grade specifications, relative molecular mass from it is thousands of to 1,000,000 or more homopolymer, altogether
Polymers and crosslinking series of polymers product, and extensive use is obtained with its excellent unique performance.
Polyvinylpyrrolidone has many excellent properties as pore-foaming agent, the film of manufacture.With chemical property stability；Energy
Efficiently control the size of membrane aperture and the distribution in hole；Increase the density of fenestra, improves permeability of the membrane；Improve the parent of film surface
It is aqueous, good biocompatibility.
Chitosan (chitosan) is also known as chitosan, is chitin (chitin) warp being widely present by nature
Cross what deacetylation obtained, chemical name is Chitosan (1-4) -2- amino-B-D glucose.
One significant properties of chitosan is adsorption capacity.The material of many low molecular weights, such as metal ion, courage are solid
Alcohol, triglycerides, cholic acid and organic mercury etc. can be adsorbed by chitosan.Especially chitosan can not only adsorb magnesium, potassium,
And zinc, calcium, mercury and uranium can be adsorbed.The adsorption activity of chitosan can selectively play a role.These metal ions exist
It is harmful that concentration is too high in human body.For example, copper ion in blood（Cu2+）Excessive concentration can lead to copper poisoning, or even generate cause
Cancer consequence.Have been demonstrated that chitosan is efficient loaded article medium.It is deacetylated that the size of the adsorption capacity of chitosan depends on its
Degree.Deacetylation is bigger, and adsorption capacity is stronger.
Therefore, the present invention is used as the fibrous template of loaded metal ion using chitosan.
In order to improve the charge-discharge performance of material, further：In step a, chitosan, aqueous acetic acid, polyvinyl alcohol,
The weight ratio of polyvinylpyrrolidone is 1:10~15:2~5:1~1.5, wherein acetate concentration is based on 7wt%.
In order to improve the charge-discharge performance of material, further：Chitosan, aqueous acetic acid, polyvinyl alcohol, polyethylene pyrrole
The weight ratio of pyrrolidone is 1:12~14:3~4:1.2~1.4.
In order to improve the charge-discharge performance of material, further：Chitosan, aqueous acetic acid, polyvinyl alcohol, polyethylene pyrrole
The weight ratio of pyrrolidone is 1:13:3.5:1.3.
Wherein：In step b, nickel source is any one in nickel chloride, nickelous carbonate, nickel sulfate, nickel nitrate, nickel acetate；Cobalt
Source is any one in cobalt chloride, cobalt nitrate, cobaltous sulfate；Manganese source is manganese carbonate, manganese sulfate, manganese chloride, manganese acetate, manganese nitrate
In any one.
In order to improve the charge-discharge performance of material, further：In step b, nickel source is nickel chloride；Cobalt source is cobalt chloride；
Manganese source is manganese carbonate.
In order to improve the charge-discharge performance of material, further：In step b, hollow porous organic fiber, nickel source, cobalt source
Weight part ratio with manganese source is 10~30:8:1:1.
In order to improve the charge-discharge performance of material, further：In step c, the organic fiber and powder of metal ion load
The weight part ratio of last shape lithium source is 1:2~5.
In order to improve the charge-discharge performance of material, further：In step c, the organic fiber and powder of metal ion load
The weight part ratio of last shape lithium source is 1:3.
The invention solves second technical problem be to provide the nickelic ternary lithium electricity that a kind of fiber inhibits nickel lithium mixing
Pond positive electrode.
A kind of fiber inhibits the nickelic ternary anode material of lithium battery of nickel lithium mixing, inhibits nickel lithium to mix by a kind of above-mentioned fiber
The preparation method of the nickelic ternary anode material of lithium battery of row is made.
Compared with prior art, the present invention has the advantages that：
（1）A kind of fiber prepared by the present invention inhibits the nickelic ternary anode material of lithium battery of nickel lithium mixing, is hollow porous knot
The one-dimensional tubular porous structure of structure, fiber can effectively reduce the transmission path of lithium ion and provide more transmission channels.
（2）A kind of fiber prepared by the present invention inhibits the nickelic ternary anode material of lithium battery of nickel lithium mixing, solves biography
It unites the serious problem of nickelic tertiary cathode material nickel lithium mixing, while one-dimentional structure can improve the charge-discharge performance of material.
（3）The preparation method of the present invention is simple, easy to operate.
Specific implementation mode
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
A kind of 1 fiber of embodiment inhibits the preparation of the nickelic ternary anode material of lithium battery of nickel lithium mixing
It prepares according to the following steps：
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 4 hours to 90 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic spinning
Obtain hollow porous organic fiber；Wherein, chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be
1:13:3.5:1.3；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then 30 points of ultrasound
Clock is placed into acetone and is impregnated 40 minutes, after taking out drying, obtains the organic fiber of metal ion load；Wherein, the nickel source
For nickel chloride；Cobalt source is cobalt chloride；Manganese source is manganese carbonate；The weight part ratio of hollow porous organic fiber, nickel source, cobalt source and manganese source
It is 20:8:1:1
C, with powdered lithium source by weight 1 after the organic fiber of metal ion load being ground:3 mixing obtain height through sintering
Nickel ternary anode material of lithium battery.
A kind of 2 fiber of embodiment inhibits the preparation of the nickelic ternary anode material of lithium battery of nickel lithium mixing
It prepares according to the following steps：
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 3.5 hours to 85 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic spinning
Silk obtains hollow porous organic fiber；Wherein, the weight ratio of chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone
It is 1:12:2.5:1.1；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then 25 points of ultrasound
Clock is placed into acetone and is impregnated 35 minutes, after taking out drying, obtains the organic fiber of metal ion load；Wherein, the nickel source
For nickelous carbonate；Cobalt source is cobalt nitrate；Manganese source is manganese sulfate；The weight part ratio of hollow porous organic fiber, nickel source, cobalt source and manganese source
It is 15:8:1:1
C, with powdered lithium source by weight 1 after the organic fiber of metal ion load being ground:2.5 mixing, obtain through sintering
Nickelic ternary anode material of lithium battery.
A kind of 3 fiber of embodiment inhibits the preparation of the nickelic ternary anode material of lithium battery of nickel lithium mixing
It prepares according to the following steps：
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 4 hours to 95 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic spinning
Obtain hollow porous organic fiber；Wherein, chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be
1:14:4:1.4；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then 35 points of ultrasound
Clock is placed into acetone and is impregnated 40 minutes, after taking out drying, obtains the organic fiber of metal ion load；Wherein, the nickel source
For nickel sulfate；Cobalt source is cobaltous sulfate；Manganese source is manganese chloride；The weight part ratio of hollow porous organic fiber, nickel source, cobalt source and manganese source
It is 28:8:1:1
C, with powdered lithium source by weight 1 after the organic fiber of metal ion load being ground:4 mixing obtain height through sintering
Nickel ternary anode material of lithium battery.
A kind of 4 fiber of embodiment inhibits the preparation of the nickelic ternary anode material of lithium battery of nickel lithium mixing
It prepares according to the following steps：
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 4.5 hours to 85 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic spinning
Silk obtains hollow porous organic fiber；Wherein, the weight ratio of chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone
It is 1:11:2.3:1.3；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then 28 points of ultrasound
Clock is placed into acetone and is impregnated 38 minutes, after taking out drying, obtains the organic fiber of metal ion load；Wherein, the nickel source
For in nickel acetate；Cobalt source is cobalt chloride；Manganese source is manganese nitrate；The parts by weight of hollow porous organic fiber, nickel source, cobalt source and manganese source
Than being 28:8:1:1
C, with powdered lithium source by weight 1 after the organic fiber of metal ion load being ground:4.5 mixing, obtain through sintering
Nickelic ternary anode material of lithium battery.
A kind of 5 fiber of embodiment inhibits the preparation of the nickelic ternary anode material of lithium battery of nickel lithium mixing
It prepares according to the following steps：
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 3 hours to 80 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic spinning
Obtain hollow porous organic fiber；Wherein, chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be
1:10:2:1；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then 20 points of ultrasound
Clock is placed into acetone and is impregnated 30 minutes, after taking out drying, obtains the organic fiber of metal ion load；Wherein, the nickel source
For nickelous carbonate；Cobalt source is cobaltous sulfate；Manganese source is manganese carbonate；The weight part ratio of hollow porous organic fiber, nickel source, cobalt source and manganese source
It is 10:8:1:1
C, with powdered lithium source by weight 1 after the organic fiber of metal ion load being ground:2 mixing obtain height through sintering
Nickel ternary anode material of lithium battery.
A kind of 6 fiber of embodiment inhibits the preparation of the nickelic ternary anode material of lithium battery of nickel lithium mixing
It prepares according to the following steps：
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 5 hours to 100 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic spinning
Silk obtains hollow porous organic fiber；Wherein, the weight ratio of chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone
It is 1:15:5:1.5；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then 40 points of ultrasound
Clock is placed into acetone and is impregnated 50 minutes, after taking out drying, obtains the organic fiber of metal ion load；Wherein, the nickel source
For nickel nitrate；Cobalt source is cobalt nitrate；Manganese source is manganese chloride；The weight part ratio of hollow porous organic fiber, nickel source, cobalt source and manganese source
It is 30:8:1:1
C, with powdered lithium source by weight 1 after the organic fiber of metal ion load being ground:5 mixing obtain height through sintering
Nickel ternary anode material of lithium battery.
A kind of 1 fiber of comparative example inhibits the preparation of the nickelic ternary anode material of lithium battery of nickel lithium mixing
It prepares according to the following steps：
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 3 hours to 80 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic spinning
Obtain hollow porous organic fiber；Wherein, chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be
1:5:8:8；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then 20 points of ultrasound
Clock is placed into acetone and is impregnated 30 minutes, after taking out drying, obtains the organic fiber of metal ion load；Wherein, the nickel source
For nickel chloride；Cobalt source is cobalt chloride；Manganese source is manganese carbonate；The weight part ratio of hollow porous organic fiber, nickel source, cobalt source and manganese source
It is 5:8:1:1
C, with powdered lithium source by weight 1 after the organic fiber of metal ion load being ground:10 mixing obtain height through sintering
Nickel ternary anode material of lithium battery.
Comparative example 2
A, Chitosan powder is dissolved in 7wt% aqueous acetic acids, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, heated up
It is stirred 5 hours to 100 DEG C, adds polyvinylpyrrolidone, ultrasonic disperse uniformly obtains dispersion liquid, wherein chitosan, acetic acid
Aqueous solution, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be 1:25:10:10；
B, the dispersion liquid of step a is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, then ultrasound 20 minutes,
It places into acetone and impregnates 30 minutes, take out drying；Wherein, the nickel source is nickel sulfate；Cobalt source is cobalt nitrate；Manganese source is nitric acid
Manganese；Hollow porous organic fiber, nickel source, cobalt source and manganese source weight part ratio be 10:8:1:1
C, after grinding with powdered lithium source by weight 1:7 mixing obtain nickelic ternary anode material of lithium battery through sintering.
Test example
The nickelic ternary anode material of lithium battery that above-described embodiment refers to is assembled into lithium ion battery, cathode uses metal lithium sheet,
Electrolyte is the LiPF6 of 1.0mol/L in lithium ion battery（EC/EMC=3:7）, the performance of lithium battery is detected.Test
Lithium ion battery carries out constant current charge-discharge cycle in 4.6~3.0V voltage ranges using different current densities, and first 10 times are 0.1C
Charging/0.1C electric discharge, the 11st~30 time is 0.5C chargings/0.5C electric discharges, is set as 1C chargings/1C electric discharges the 31st~100 time.It surveys
First discharge specific capacity, cycle 100 circle after capacity be shown in Table 1.
Table 1
| Serial number | First discharge specific capacity（mAh/g） | Capacity after 100 circle of cycle（mAh/g） |
| Embodiment 1 | 200.8 | 190.7 |
| Embodiment 2 | 202.1 | 186.5 |
| Embodiment 3 | 199.3 | 186.3 |
| Embodiment 4 | 213.0 | 194.4 |
| Embodiment 5 | 192.3 | 175.9 |
| Embodiment 6 | 199.2 | 180.1 |
| Comparative example 1 | 201.3 | 131.0 |
| Comparative example 2 | 198.6 | 109.2 |
Claims (10)
1. a kind of fiber inhibits the preparation method of the nickelic ternary anode material of lithium battery of nickel lithium mixing, which is characterized in that it is made
Preparation Method includes the following steps：
A, Chitosan powder is dissolved in aqueous acetic acid, homogeneous phase solution is obtained after stirring, polyvinyl alcohol is then added, is warming up to 80
~100 DEG C are stirred 3~5 hours, add polyvinylpyrrolidone, ultrasonic disperse is uniform, obtains spinning solution；Using coaxial electrostatic
Spinning obtains hollow porous organic fiber；
B, hollow porous organic fiber is added to the aqueous solution of nickel source, cobalt source and manganese source, stirred 1~2 hour, subsequent ultrasound 20~
It 40 minutes, places into acetone and impregnates 30~50 minutes, after taking out drying, obtain the organic fiber of metal ion load；
C, it will be mixed with powdered lithium source after the organic fiber grinding of metal ion load, nickelic ternary lithium battery obtained through sintering
Positive electrode.
2. a kind of fiber according to claim 1 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：In step a, chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be 1:10
~15:2~5:1~1.5, wherein aqueous acetic acid concentration is based on 7wt%.
3. a kind of fiber according to claim 2 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：Chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be 1:12~14:3~
4:1.2~1.4.
4. a kind of fiber according to claim 3 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：Chitosan, aqueous acetic acid, polyvinyl alcohol, polyvinylpyrrolidone weight ratio be 1:13:3.5:
1.3。
5. a kind of fiber according to claim 3 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：In step b, nickel source is any one in nickel chloride, nickelous carbonate, nickel sulfate, nickel nitrate, nickel acetate；Cobalt
Source is any one in cobalt chloride, cobalt nitrate, cobaltous sulfate；Manganese source is manganese carbonate, manganese sulfate, manganese chloride, manganese acetate, manganese nitrate
In any one.
6. a kind of fiber according to claim 5 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：In step b, nickel source is nickel chloride；Cobalt source is cobalt chloride；Manganese source is manganese carbonate.
7. a kind of fiber according to claim 3 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：In step b, hollow porous organic fiber, nickel source, cobalt source and manganese source weight part ratio be 10~30:8:1:
1。
8. a kind of fiber according to claim 3 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：In step c, the organic fiber of metal ion load is 1 with the weight part ratio of powdered lithium source:2~5.
9. a kind of fiber according to claim 3 inhibits the preparation side of the nickelic ternary anode material of lithium battery of nickel lithium mixing
Method, it is characterised in that：In step c, the organic fiber of metal ion load is 1 with the weight part ratio of powdered lithium source:3.
10. a kind of fiber inhibits the nickelic ternary anode material of lithium battery of nickel lithium mixing, it is characterised in that：By claim 1~9
Any one of them preparation method is made.
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| CN109659519A (en) * | 2018-11-30 | 2019-04-19 | 淮安新能源材料技术研究院 | TiO2The ternary cathode material of lithium ion battery preparation method and product of nano fiber coated |
| CN109713252A (en) * | 2018-11-30 | 2019-05-03 | 高点(深圳)科技有限公司 | The high nickelic tertiary cathode material and its preparation method and application of electrical property consistency |
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Application publication date: 20180907 |