CN107634219A - A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes - Google Patents
A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes Download PDFInfo
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- CN107634219A CN107634219A CN201710619692.1A CN201710619692A CN107634219A CN 107634219 A CN107634219 A CN 107634219A CN 201710619692 A CN201710619692 A CN 201710619692A CN 107634219 A CN107634219 A CN 107634219A
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- acid fluoride
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000007791 liquid phase Substances 0.000 title claims abstract description 25
- 238000001556 precipitation Methods 0.000 title claims abstract description 25
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 15
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 15
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000011259 mixed solution Substances 0.000 claims abstract description 37
- KVBCYCWRDBDGBG-UHFFFAOYSA-N azane;dihydrofluoride Chemical compound [NH4+].F.[F-] KVBCYCWRDBDGBG-UHFFFAOYSA-N 0.000 claims abstract description 31
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000243 solution Substances 0.000 claims abstract description 30
- 239000007864 aqueous solution Substances 0.000 claims abstract description 23
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 22
- 239000004094 surface-active agent Substances 0.000 claims abstract description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011261 inert gas Substances 0.000 claims abstract description 11
- 239000012298 atmosphere Substances 0.000 claims abstract description 10
- 238000013019 agitation Methods 0.000 claims abstract description 8
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 8
- -1 Water sorbitol ester Chemical class 0.000 claims description 9
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 229930006000 Sucrose Natural products 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 239000005720 sucrose Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 19
- 239000002245 particle Substances 0.000 abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000002572 peristaltic effect Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000004087 circulation Effects 0.000 description 3
- SHXXPRJOPFJRHA-UHFFFAOYSA-K iron(iii) fluoride Chemical compound F[Fe](F)F SHXXPRJOPFJRHA-UHFFFAOYSA-K 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009831 deintercalation Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 229910001512 metal fluoride Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 150000008040 ionic compounds Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- 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
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to a kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, belongs to technical field of lithium ion.Ferric nitrate, silver nitrate are dissolved in ethanol by the present invention obtains mixed solution A；Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, surfactant is dissolved in the water and is configured to solution C；Under agitation, saturation ammonium acid fluoride aqueous solution B and solution C are well mixed, mixed solution A is then added dropwise dropwise and reacts 10 ~ 20h；Reaction product is filtered, washed, is dried, 1 ~ 2h of roasting produces nanometer Fe F under the conditions of being then 400 ~ 600 DEG C in atmosphere of inert gases, temperature3/ Ag positive electrodes.The nanometer Fe F that the inventive method is prepared3/ Ag has the characteristics that granularity is small, even particle size, nanometer Fe F3/ Ag positive electrodes are used to prepare lithium ion battery, have higher specific discharge capacity.
Description
Technical field
The present invention relates to a kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, belongs to lithium ion battery
Technical field.
Background technology
The energy is the lifeblood of current social development, and fossil fuel increasingly depleted and serious problem of environmental pollution cause newly
The storage of the energy turns into study hotspot important at present with application.Lithium ion battery has been widely used in mobile electricity at present
In the high-grade electric appliances such as words, notebook computer, this is the high working voltage based on it, high power capacity, of low pollution and long circulation life etc.
Advantage.And electrode material is the basis for preparing lithium ion battery, the positive electrode of the characteristic and price of lithium ion battery all with it
Closely related, one of exploitation lithium ion battery main target is to find a kind of suitable electrode material, battery is had well
Lithium embedded quantity and lithium deintercalation invertibity, to meet battery high voltage, Large Copacity and the requirement of long circulation life.Metal fluoride is
A kind of very promising anode material of lithium battery.
Metal fluoride can not only carry out Lithium-ion embeding abjection reaction, chemical conversioning reaction can also occur with lithium
Storing energy, its capacity released are significantly larger than Lithium-ion embeding/deintercalation reaction on traditional outline.Relative to traditional positive pole material
Material（LiCoO2、LiFePO4Deng）For, FeF3With less relative molecular mass, so its theoretical specific capacity is larger；It is stronger
Fe-F ionic bonds cause both that there is higher electrochemical potential, therefore FeF3With higher theoretical specific energy density.But FeF3
Typical ionic compound, Fe-F band gaps are big, belong to electronic body, so as to cause the chemical property of the material compared with
Difference, if being directly used as anode material of lithium battery, its chemical property cannot be fully played, it is necessary to it is modified and come
Improve its chemical property.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of liquid-phase precipitation method synthesis nanometer Fe F3/ Ag positive electrodes
Method, the inventive method synthesizes to obtain presoma by liquid-phase precipitation method, then roasting obtains nanometer under atmosphere of inert gases
FeF3/ Ag products, nanometer Fe F3/ Ag has the characteristics that granularity is small, even particle size, nanometer Fe F3/ Ag positive electrodes are used to make
Standby lithium ion battery, has higher specific discharge capacity.
A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, is concretely comprised the following steps：
（1）Ferric nitrate, silver nitrate are dissolved in ethanol and obtain mixed solution A；
（2）Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, surfactant is dissolved in the water and matched somebody with somebody
Solution C is made；
（3）Under agitation, by step（2）Gained saturation ammonium acid fluoride aqueous solution B and solution C are well mixed, then dropwise
Step is added dropwise（1）Gained mixed solution A reacts 10 ~ 20h；
（4）By step（3）The filtering of gained reaction product, washing, dry, be then 400 ~ 600 DEG C in atmosphere of inert gases, temperature
Under the conditions of roasting 1 ~ 2h produce nanometer Fe F3/ Ag positive electrodes；
The step（1）The mol ratio of ferric nitrate and silver nitrate is (5 ~ 7) in mixed solution A:1, silver nitrate in mixed solution A
0.057~0.080 mol/L；
The step（2）The concentration of surfactant is 0.02 ~ 0.05 mol/L in solution C, surfactant be polyethylene glycol,
Polyacrylamide, sorbitan ester or sucrose ester；
The step（3）Middle saturation ammonium acid fluoride aqueous solution B, solution C and mixed solution A volume ratio are (2 ~ 3):(1~2):(5
~7)；
Beneficial effects of the present invention：
（1）The inventive method synthesizes to obtain presoma by liquid-phase precipitation method, then roasting obtains nanometer under atmosphere of inert gases
FeF3/ Ag, technique is simple, cost is cheap, and nanometer Fe F3/ Ag has the characteristics that granularity is small, even particle size；
（2）Nanometer Fe F of the present invention3/ Ag positive electrodes are used to prepare lithium ion battery, have higher specific discharge capacity.
Brief description of the drawings
Fig. 1 is the nanometer Fe F that the embodiment of the present invention 1 obtains3/ Ag XRD；
Fig. 2 is the nanometer Fe F that the embodiment of the present invention 1 obtains3/ Ag transmission electron microscope picture；
Fig. 3 is the nanometer Fe F of the embodiment of the present invention 13The first charge-discharge for the lithium ion battery that/Ag positive electrodes are prepared is bent
Line；
Fig. 4 is the nanometer Fe F of the embodiment of the present invention 13The cycle performance figure for the lithium ion battery that/Ag positive electrodes are prepared.
Embodiment
The present invention is described in further detail with reference to embodiment, but protection scope of the present invention and unlimited
In the content.
Embodiment 1：A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, is concretely comprised the following steps：
（1）Ferric nitrate, silver nitrate are dissolved in ethanol and obtain mixed solution A, ferric nitrate and silver nitrate wherein in mixed solution A
Mol ratio be 5:1, the concentration of silver nitrate is 0.080 mol/L in mixed solution A；
（2）Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, by surfactant（Surfactant
For polyethylene glycol）It is dissolved in the water and is configured to solution C, wherein surfactant in solution C（Polyethylene glycol）Concentration be 0.05
mol/L；
（3）Under agitation, by step（2）Gained saturation ammonium acid fluoride aqueous solution B and solution C mix in a kettle
It is even, step is then added dropwise using peristaltic pump dropwise（1）Gained mixed solution A simultaneously reacts 20h, wherein the saturation ammonium acid fluoride aqueous solution
B, the volume ratio of solution C and mixed solution A is 2:1:5；
（4）By step（3）Gained reaction product filters, and is washed with alcohol solvent, dries, then in inert gas（Inert gas
For argon gas）Roasting 1.5h produces nanometer Fe F under the conditions of atmosphere, temperature are 400 DEG C3/ Ag positive electrodes；
The present embodiment liquid-phase precipitation method synthesizes obtained nanometer Fe F3The XRD of/Ag positive electrodes is as shown in figure 1, can from Fig. 1
Know, material is orthorhombic crystalline structure, space group R3C, shows that diffraction maximum all corresponds to FeF by PDF cards3, Ag incorporation is simultaneously
Do not change FeF3Structure but be present in FeF in the form of solid solution3In crystal.Diffraction maximum is more sharp, shows the crystallization of material
Spend；
The present embodiment liquid-phase precipitation method synthesizes obtained nanometer Fe F3/ Ag transmission electron microscope pictures are as shown in Fig. 2 as shown in Figure 2, this reality
Apply the nanometer Fe F of example preparation3/ Ag particles are uniformly distributed, and particle size is about 200nm；
Electrochemical property test：
The nanometer Fe F that the present embodiment is prepared3/ Ag powder, acetylene black, Kynoar (PVDF) are 8 in mass ratio:1:
1 ratio is placed in agate mortar, and it is uniform that appropriate METHYLPYRROLIDONE (NMP) grinding is added dropwise；It is then coated with Al paper tinsels
On, wherein being 0.15mm coated in the thickness on Al paper tinsels, then it is placed in the vacuum drying chamber that temperature is 80 DEG C and dries 24h, takes out
As positive pole；Metal lithium sheet is as negative pole and reference electrode, and microporous polypropylene membrane is barrier film, with 1mol/LiPF6 +EC/DMC/
EMC is electrolyte, in the glove box of argon atmosphere, moisture less than 2ppm, is assembled into CR2025 stainless steels button electricity
Pond；Its charge-discharge performance is tested after standing 24h；
The nanometer Fe F that the present embodiment is synthesized with liquid-phase precipitation method3The FeF that/Ag is prepared3/ Ag lithium ion batteries fill first
Discharge curve is as shown in figure 3, from the figure 3, it may be seen that the present embodiment battery maximum specific discharge capacity is 240.467mA h g-1；This implementation
The nanometer Fe F that example is synthesized with liquid-phase precipitation method3The FeF that/Ag is prepared3The high rate performances of/Ag lithium ion batteries as shown in figure 4,
As shown in Figure 4, the present embodiment battery specific discharge capacity after 20 circulations is 117.712mA h g-1。
Embodiment 2：A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, is concretely comprised the following steps：
（1）Ferric nitrate, silver nitrate are dissolved in ethanol and obtain mixed solution A, ferric nitrate and silver nitrate wherein in mixed solution A
Mol ratio be 6:1, the concentration of silver nitrate is 0.067 mol/L in mixed solution A；
（2）Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, by surfactant（Surfactant
For polyethylene glycol）It is dissolved in the water and is configured to solution C, wherein surfactant in solution C（Polyethylene glycol）Concentration be 0.03
mol/L；
（3）Under agitation, by step（2）Gained saturation ammonium acid fluoride aqueous solution B and solution C mix in a kettle
It is even, step is then added dropwise using peristaltic pump dropwise（1）The reaction of gained mixed solution A 10h, wherein saturation ammonium acid fluoride aqueous solution B,
The volume ratio of solution C and mixed solution A is 2:2:5.
（4）By step（3）Gained reaction product filters, and is washed with alcohol solvent, dries, then in inert gas（Inertia
Gas is argon gas）Roasting 2h produces nanometer Fe F under the conditions of atmosphere, temperature are 500 DEG C3/ Ag positive electrodes；
Electrochemical property test：The nanometer Fe F that the present embodiment is prepared3/ Ag powder is assembled into the way of embodiment 1
CR2025 button cells；Its charge-discharge performance is tested after standing 24h；
The nanometer Fe F that the present embodiment is synthesized with liquid-phase precipitation method3The FeF that/Ag is prepared3The maximum electric discharge of/Ag lithium ion batteries
Specific capacity is 190.584mA hg-1。
Embodiment 3：A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, is concretely comprised the following steps：
（1）Ferric nitrate, silver nitrate are dissolved in ethanol and obtain mixed solution A, ferric nitrate and silver nitrate wherein in mixed solution A
Mol ratio be 7:1, the concentration of silver nitrate is 0.057 mol/L in mixed solution A；
（2）Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, by surfactant（Surfactant
For polyacrylamide）It is dissolved in the water and is configured to solution C, wherein surfactant in solution C（Polyacrylamide）Concentration be
0.04 mol/L；
（3）Under agitation, by step（2）Gained saturation ammonium acid fluoride aqueous solution B and solution C mix in a kettle
It is even, step is then added dropwise using peristaltic pump dropwise（1）The reaction of gained mixed solution A 15h, wherein saturation ammonium acid fluoride aqueous solution B,
The volume ratio of solution C and mixed solution A is 3:1: 6.
（4）By step（3）Gained reaction product filters, and is washed with alcohol solvent, dries, then in inert gas（Inertia
Gas is argon gas）Roasting 1h produces nanometer Fe F under the conditions of atmosphere, temperature are 600 DEG C3/ Ag positive electrodes；
Electrochemical property test：The nanometer Fe F that the present embodiment is prepared3/ Ag powder is assembled into the way of embodiment 1
CR2025 button cells；Its charge-discharge performance is tested after standing 24h；
The nanometer Fe F that the present embodiment is synthesized with liquid-phase precipitation method3The FeF that/Ag is prepared3The maximum electric discharge of/Ag lithium ion batteries
Specific capacity is 198.125mA hg-1。
Embodiment 4：A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, is concretely comprised the following steps：
（1）Ferric nitrate, silver nitrate are dissolved in ethanol and obtain mixed solution A, ferric nitrate and silver nitrate wherein in mixed solution A
Mol ratio be 6:1, the concentration of silver nitrate is 0.067 mol/L in mixed solution A；
（2）Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, by surfactant（Surfactant
For sorbitan ester）It is dissolved in the water and is configured to solution C, wherein surfactant in solution C（Sorbitan ester）It is dense
Spend for 0.02 mol/L；
（3）Under agitation, by step（2）Gained saturation ammonium acid fluoride aqueous solution B and solution C mix in a kettle
It is even, step is then added dropwise using peristaltic pump dropwise（1）The reaction of gained mixed solution A 13h, wherein saturation ammonium acid fluoride aqueous solution B,
The volume ratio of solution C and mixed solution A is 3:2 : 6.
（4）By step（3）Gained reaction product filters, and is washed with alcohol solvent, dries, then in inert gas（Inertia
Gas is argon gas）Roasting 2h produces nanometer Fe F under the conditions of atmosphere, temperature are 450 DEG C3/ Ag positive electrodes；
Electrochemical property test：The nanometer Fe F that the present embodiment is prepared3/ Ag powder is assembled into the way of embodiment 1
CR2025 button cells；Its charge-discharge performance is tested after standing 24h；
The nanometer Fe F that the present embodiment is synthesized with liquid-phase precipitation method3The FeF that/Ag is prepared3The maximum electric discharge of/Ag lithium ion batteries
Specific capacity is 174.994mA hg-1。
Embodiment 5：A kind of liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, is concretely comprised the following steps：
（1）Ferric nitrate, silver nitrate are dissolved in ethanol and obtain mixed solution A, ferric nitrate and silver nitrate wherein in mixed solution A
Mol ratio be 7:1, the concentration of silver nitrate is 0.057 mol/L in mixed solution A；
（2）Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, by surfactant（Surfactant
For sucrose ester）It is dissolved in the water and is configured to solution C, wherein surfactant in solution C（Sucrose ester）Concentration be 0.05 mol/
L；
（3）Under agitation, by step（2）Gained saturation ammonium acid fluoride aqueous solution B and solution C mix in a kettle
It is even, step is then added dropwise using peristaltic pump dropwise（1）The reaction of gained mixed solution A 15h, wherein saturation ammonium acid fluoride aqueous solution B,
The volume ratio of solution C and mixed solution A is 3:2:7.
（4）By step（3）Gained reaction product filters, and is washed with alcohol solvent, dries, then in inert gas（Inertia
Gas is argon gas）Roasting 1h produces nanometer Fe F under the conditions of atmosphere, temperature are 400 DEG C3/ Ag positive electrodes；
Electrochemical property test：The nanometer Fe F that the present embodiment is prepared3/ Ag powder is assembled into the way of embodiment 1
CR2025 button cells；Its charge-discharge performance is tested after standing 24h；
The nanometer Fe F that the present embodiment is synthesized with liquid-phase precipitation method3The FeF that/Ag is prepared3The maximum electric discharge of/Ag lithium ion batteries
Specific capacity is 208.451mA hg-1。
Claims (4)
- A kind of 1. liquid-phase precipitation method synthesis nanometer Fe F3The method of/Ag positive electrodes, it is characterised in that concretely comprise the following steps：（1）Ferric nitrate, silver nitrate are dissolved in ethanol and obtain mixed solution A；（2）Ammonium acid fluoride is dissolved in the water and is configured to saturation ammonium acid fluoride aqueous solution B, surfactant is dissolved in the water and matched somebody with somebody Solution C is made；（3）Under agitation, by step（2）Gained saturation ammonium acid fluoride aqueous solution B and solution C are well mixed, then dropwise Step is added dropwise（1）Gained mixed solution A reacts 10 ~ 20h；（4）By step（3）The filtering of gained reaction product, washing, dry, be then 400 ~ 600 DEG C in atmosphere of inert gases, temperature Under the conditions of roasting 1 ~ 2h produce nanometer Fe F3/ Ag positive electrodes.
- 2. liquid-phase precipitation method synthesis nanometer Fe F according to claim 13The method of/Ag positive electrodes, it is characterised in that：Step （1）The mol ratio of ferric nitrate and silver nitrate is (5 ~ 7) in mixed solution A:1, in mixed solution A the concentration of silver nitrate for 0.057 ~ 0.080 mol/L。
- 3. liquid-phase precipitation method synthesis nanometer Fe F according to claim 13The method of/Ag positive electrodes, it is characterised in that：Step （2）The concentration of surfactant is 0.02 ~ 0.05mol/L in solution C, and surfactant is polyethylene glycol, polyacrylamide, mistake Water sorbitol ester or sucrose ester.
- 4. liquid-phase precipitation method synthesis nanometer Fe F according to claim 13The method of/Ag positive electrodes, it is characterised in that：Step （3）Middle saturation ammonium acid fluoride aqueous solution B, solution C and mixed solution A volume ratio are (2 ~ 3):(1~2):(5~7).
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150542A (en) * | 2014-07-14 | 2014-11-19 | 宁波大学 | A Cu2+, co2+, ag+doped iron fluoride composite anode material and its preparation method |
| CN105680043A (en) * | 2016-01-27 | 2016-06-15 | 天津大学 | Preparation of nano-ferric fluoride and application of nano-ferric fluoride to positive electrode of high-specific-capacity lithium ion battery |
-
2017
- 2017-07-26 CN CN201710619692.1A patent/CN107634219A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104150542A (en) * | 2014-07-14 | 2014-11-19 | 宁波大学 | A Cu2+, co2+, ag+doped iron fluoride composite anode material and its preparation method |
| CN105680043A (en) * | 2016-01-27 | 2016-06-15 | 天津大学 | Preparation of nano-ferric fluoride and application of nano-ferric fluoride to positive electrode of high-specific-capacity lithium ion battery |
Non-Patent Citations (1)
| Title |
|---|
| YU LI等: ""Building an Electronic Bridge via Ag Decoration To Enhance Kinetics of Iron Fluoride Cathode in Lithium-Ion Batteries"", 《ACS APPL. MATER. INTERFACES》 * |
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