CN103227324B - Preparation method of iron oxide cathode material for lithium ion battery - Google Patents
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- CN103227324B CN103227324B CN201310145924.6A CN201310145924A CN103227324B CN 103227324 B CN103227324 B CN 103227324B CN 201310145924 A CN201310145924 A CN 201310145924A CN 103227324 B CN103227324 B CN 103227324B
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000010406 cathode material Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 16
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000002243 precursor Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- 238000005253 cladding Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000003980 solgel method Methods 0.000 claims abstract description 7
- 239000004964 aerogel Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 19
- 239000001294 propane Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 7
- 238000013019 agitation Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000002105 nanoparticle Substances 0.000 claims description 6
- 239000007773 negative electrode material Substances 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 150000001722 carbon compounds Chemical class 0.000 claims description 3
- 238000005229 chemical vapour deposition Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 32
- 238000001035 drying Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 4
- 230000005518 electrochemistry Effects 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 229910000314 transition metal oxide Inorganic materials 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 235000019441 ethanol Nutrition 0.000 description 5
- 125000005909 ethyl alcohol group Chemical group 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910013870 LiPF 6 Inorganic materials 0.000 description 4
- 239000006230 acetylene black Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000643 oven drying Methods 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Natural products CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005287 template synthesis Methods 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
Classifications
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- 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 invention discloses a preparation method of an iron oxide cathode material for lithium ion battery, which belongs to the fields of new material and electrochemistry. The invention employs a sol-gel method and normal pressure drying technology for preparing an iron oxide precursor with xerogel or aerogel structure, and after a heat treatment technology, the iron oxide cathode material is parpared. The invention also employs a carbon cladding technology for preparing iron oxide/carbon composite material. The invention has the advantages that the prepared material is fine and uniform particle powder, and the preparation technology process is simple with mild condition and low cost, and is convenient for large scale preparation. The iron oxide cathode material and iron oxide/carbon composite cathode material has higher circulating ratio capacity and good circulating stability, and is used as an ideal lithium ion battery cathode material, and has latent application prospects in the fields of portable electronic equipment, electric automobile and aviation spaceflight, etc.
Description
Technical field
The invention belongs to new material and electrochemical field, be specifically related to a kind of novel can charging-discharging lithium ion battery iron oxide cathode material and preparation method thereof.
Technical background
Along with the fast development of portable electric appts and electric vehicle, the research of high performance lithium ion battery has become the focus of global concern.What in current business-like lithium ion battery, negative pole adopted is graphite cathode material, through a large amount of improvements, the actual lithium storage content of current graphite more and more its theoretical capacity of convergence (graphite theoretical capacity is 372 mAh/g, 855 mAh/cm
3), the potentiality thus improving its specific capacity are further very limited.For meeting the demand of high performance lithium ion battery to high-capacity cathode material, the lithium ion battery negative material of Novel high-specific capacity flexible must be researched and developed.
Transition metal oxide, as Fe
2o
3, Fe
4o
3, CuO, NiO, CoO etc., the theoretical specific capacity higher because of it and good fail safe more and more cause the concern of researchers.But transition metal oxide easily produces cracked efflorescence owing to there is larger change in volume in removal lithium embedded process, thus make amount of activated material in cyclic process, lose effective electrical contact, its capacity is decayed gradually, and cyclical stability is poor.Therefore how while keeping its height ratio capacity characteristic, improve the cyclical stability of transition metal oxide negative material, become the key point that such negative material realizes practical application.Improve oxide cathode material circulation stability, conventional means comprise:
prepare nanoscale transition metal oxide material, the change in volume of active material in removal lithium embedded process can be made more even, the diffusion length of lithium ion can also be shortened simultaneously, improve electrode reaction speed, improve the cycle performance of electrode.
prepare transition metal oxide composite material, while reducing transition metal oxide active phase volume effect, introduce the little activity of good conductivity, bulk effect or inert matter, by volume compensation, increase the cyclical stability that the modes such as conductivity improve electrode.
In transition metal oxide, Fe
2o
3theoretical specific capacity as lithium ion battery negative material can reach 1005 mAh/g, far away higher than the theoretical lithium storage content of graphite cathode material.In addition, Fe
2o
3also having the advantages such as with low cost, raw material sources is abundant, safety and environmental protection, is the very potential high performance lithium ionic cell cathode material of one.
In order to improve Fe
2o
3electrochemistry cycle performance, researchers have carried out a lot of research to it.By preparing the Fe with special appearance of nanoscale
2o
3material, improves its electrochemistry cycle performance.Lou profound and powerful writing seminar of Nanyang Technological University is Fe with class emulsus Template preparation
2o
3hollow ball (B. Wang, et al. Journal of the American Chemical Society 133 (2011): 17146-17148), it discharges first and charge specific capacity is respectively 1219 and 877 mAh/g, circulates after 100 times and still can maintain 710 mAh/g.Chen Jun seminar of Nankai University is with template synthesis Fe
2o
3nanotube (J. Chen, et al. Advanced Materials 17 (2005): 582-586), makes electrode with this material and has higher circulation volume.Show seminar of kingdom of University of Wollongong of Australia take copolymer as template, prepares mesoporous Fe by soft template method
2o
3material (B. Sun, et al. Journal of Physical Chemistry C 114 (2010): 18753-18761).This material has higher reversible capacity, and has good cycle performance and high rate performance.Fe has also prepared by hydro thermal method in kingdom's show seminar in addition
2o
3nanometer rods (H. Liu, et al. Electrochimica Acta 54 (2009): 1733-1736), the reversible capacity first of electrode is 955 mAh/g.Xie Yi seminar of department of chemistry of Chinese University of Science and Technology is by FeCl
3120 after mixing with inorganic salts
oc hydro-thermal 12 h, then prepare Fe through vacuumize and heat treatment step
2o
3nanometer rods, and the chemical property (C. Wu, et al. Journal of Physical Chemistry B 110 (2006): 17806-17812) testing material.Researchers are also devoted to prepare the coated Fe of carbon in addition
2o
3material improves the cyclical stability of electrode.Application number is the patent of 201110412275.2, with business powder Fe
2o
3carry out ball-milling treatment with material with carbon element and prepare carbon-encapsulated iron oxide cathode material in conjunction with Technology for Heating Processing, this material is made electrode there is good cyclical stability, but capacity is not high.
Make a general survey of document and patent report, at present for Fe
2o
3material is as the research of lithium ion battery negative material, and adopt template, hydro thermal method or ball-milling method to prepare ferriferous oxide negative material, technique is comparatively complicated, and productive rate is low more, and cost is generally higher.There is with sol-gel process preparation the iron oxide of xerogel or aerogel structure; ferric oxide nano negative material is prepared in conjunction with heat treatment; have that technique is simple, output is large, cost is low, be convenient to scale and the feature such as prepare, this is significant for advancing practical application of iron oxide cathode material.This technology has no report in current document.
Summary of the invention
The object of the present invention is to provide a kind of particle fine uniform, capacity be higher, the preparation method of high-capacity lithium ion cell iron oxide cathode material that cycle performance is good, the method has that technique is simple, output is large, reaction condition is gentle, cost is low, be convenient to scale preparation.
The present invention adopts sol-gel process and the preparation of constant pressure and dry technique to have the iron oxide presoma of xerogel or aerogel structure, and by heat treatment, prepares iron oxide cathode material.Also prepare iron oxide/carbon composite material by carbon cladding process, the cyclical stability of this material is significantly promoted.
Its concrete steps are:
(1) solution is configured: select inorganic molysite, take required quality, be dissolved in a certain amount of absolute ethyl alcohol, then add a certain amount of deionized water, stir formation orange solution;
(2) under agitation, in solution, drip a certain amount of expoxy propane, uniform stirring certain hour, after leaving standstill, form gel;
(3) adding absolute ethyl alcohol in the gel formed to step (2) carries out aging, replaces absolute ethyl alcohols, repeat 2 ~ 6 times every 24 h;
(4) gel in step (3) is carried out constant pressure and dry, obtain precursor product;
(5), under air atmosphere, the precursor product of step (4) gained is warming up to 400 ~ 900
oc is incubated 1 ~ 6 h, cools to room temperature with the furnace and obtains nano-sized iron oxide negative electrode material powder.
Inorganic molysite described in step (1) is FeCl
3, FeCl
36H
2o, Fe (NO
3)
3with Fe (NO
3)
39H
2o.
Absolute ethyl alcohol described in step (1) and deionized water addition, make absolute ethyl alcohol and deionized water and Fe
3+the ratio of amount of substance control respectively: absolute ethyl alcohol/Fe
3+=20 ~ 150, deionized water/Fe
3+=4 ~ 20.
Expoxy propane addition described in step (2), makes expoxy propane and Fe
3+the ratio of amount of substance control: expoxy propane/Fe
3+=5 ~ 14.
Constant pressure and dry described in step (4) is successively in room temperature and 80
odrying 1 ~ 3 day under C environment.
To the iron oxide cathode material powder that above-mentioned preparation process obtains, by carrying out carbon cladding process, iron oxide based carbon composite can be prepared.Described carbon cladding process comprises chemical vapour deposition technique, hydro thermal method, sol-gel process or mechanical attrition method.
The present invention adopts sol-gel process and the preparation of constant pressure and dry technique to have the ferric oxide powder of xerogel or aerogel structure, and by heat treatment, prepares iron oxide cathode material.The invention has the advantages that preparation technology is simple, reaction condition is gentle, and cost is low, safety and environmental protection, is convenient to large-scale production; The iron oxide material particle prepared in this approach is tiny, and particle diameter, distributed components have good electrical chemical property.To the iron oxide material powder obtained, carry out carbon cladding process, preparation iron oxide based carbon composite, the cyclical stability of material significantly promotes.
Accompanying drawing explanation
Fig. 1 is the first charge-discharge curve chart of the iron oxide cathode material of embodiment 1.
Fig. 2 is the circulation volume figure of the iron oxide cathode material of embodiment 1.
Fig. 3 is the circulation volume figure of the ferriferous oxide/carbon compound cathode materials of embodiment 4.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, but be not limited to protection scope of the present invention:
Embodiment 1:
Take 4.8663 g inorganic molysites, be dissolved in 100 ml absolute ethyl alcohols, then add 5.4 ml deionized waters, stir formation orange solution; Under agitation, in solution, drip 20.97 ml expoxy propane, uniform stirring certain hour, after leaving standstill, form gel; In gel, add absolute ethyl alcohol carries out aging, replaces absolute ethyl alcohol, repeat 3 times every 24 h; By gel at room temperature drying 2 days, then put into 80
oc oven drying 2 days, obtains precursor product.Under air atmosphere, precursor product is warming up to 600
oc is incubated 3 h, cools to room temperature with the furnace and obtains nano-sized iron oxide negative electrode material powder.Mixed by the PVdF of the obtained iron oxide material of 70 wt.%, the acetylene black of 15 wt.% and 15 wt.%, making slurry, be evenly coated on Copper Foil, be stamped into circular electrode pole piece after vacuum drying, is to electrode with lithium metal, 1 mol/L LiPF
6/ DMC+DEC+EC(volume ratio is 1:1:1) be electrolyte, Celgard 2400 is barrier film, composition test cell.Constant current charge-discharge test is carried out to battery, charging/discharging voltage scope is 0.01 ~ 3.0 V, result shows, it has good chemical property, under the current density of 0.1 A/g, first discharge specific capacity and charge specific capacity are respectively 1333.7 and 861.6 mAh/g, and the material capacity after 20 times that circulates is 454.8 mAh/g.
Embodiment 2:
Take 4.8663 g inorganic molysites, be dissolved in 60 ml absolute ethyl alcohols, then add 8.1 ml deionized waters, stir formation orange solution; Under agitation, in solution, drip 16.25 ml expoxy propane, uniform stirring certain hour, after leaving standstill, form gel; In gel, add absolute ethyl alcohol carries out aging, replaces absolute ethyl alcohol, repeat 3 times every 24 h; By gel at room temperature drying 2 days, then put into 100
oc oven drying 2 days, obtains precursor product.Under air atmosphere, precursor product is warming up to 600
oc is incubated 3 h, cools to room temperature with the furnace and obtains nano-sized iron oxide negative electrode material powder.Mixed by the PVdF of the obtained iron oxide material of 70 wt.%, the acetylene black of 15 wt.% and 15 wt.%, making slurry, be evenly coated on Copper Foil, be stamped into circular electrode pole piece after vacuum drying, is to electrode with lithium metal, 1 mol/L LiPF
6/ DMC+DEC+EC(volume ratio is 1:1:1) be electrolyte, Celgard 2400 is barrier film, composition test cell.Carry out constant current charge-discharge test to battery, charging/discharging voltage scope is 0.01 ~ 3.0 V, and result shows, it has good chemical property, and under the current density of 0.1 A/g, first discharge specific capacity and charge specific capacity are respectively 1310.1 and 742.6 mAh/g.
Embodiment 3:
Take 4.8663 g inorganic molysites, be dissolved in 100 ml absolute ethyl alcohols, then add 5.4 ml deionized waters, stir formation orange solution; Under agitation, in solution, drip 24.12 ml expoxy propane, uniform stirring certain hour, after leaving standstill, form gel; In gel, add absolute ethyl alcohol carries out aging, replaces absolute ethyl alcohol, repeat 3 times every 24 h; By gel at room temperature drying 2 days, then put into 80
oc oven drying 2 days, obtains precursor product.Under air atmosphere, precursor product is warming up to 800
oc is incubated 3 h, cools to room temperature with the furnace and obtains nano-sized iron oxide negative electrode material powder.Mixed by the PVdF of the obtained iron oxide material of 70 wt.%, the acetylene black of 15 wt.% and 15 wt.%, making slurry, be evenly coated on Copper Foil, be stamped into circular electrode pole piece after vacuum drying, is to electrode with lithium metal, 1 mol/L LiPF
6/ DMC+DEC+EC(volume ratio is 1:1:1) be electrolyte, Celgard 2400 is barrier film, composition test cell.Carry out constant current charge-discharge test to battery, charging/discharging voltage scope is 0.01 ~ 3.0 V, and result shows, it has good chemical property, and under the current density of 0.1 A/g, first discharge specific capacity and charge specific capacity are respectively 1251.1 and 705.4 mAh/g.
Embodiment 4:
Take 4.8663 g inorganic molysites, be dissolved in 100 ml absolute ethyl alcohols, then add 5.4 ml deionized waters, stir formation orange solution; Under agitation, in solution, drip 20.97 ml expoxy propane, uniform stirring certain hour, after leaving standstill, form gel; In gel, add absolute ethyl alcohol carries out aging, replaces absolute ethyl alcohol, repeat 3 times every 24 h; By gel at room temperature drying 2 days, then put into 80
oc oven drying 2 days, obtains precursor product.Under air atmosphere, precursor product is warming up to 600
oc is incubated 3 h, cools to room temperature with the furnace and obtains nano-sized iron oxide negative electrode material powder.Take 0.2 g ferric oxide powder and be placed in 800
obe incubated 0.5 h in the CVD tube furnace of C, carbon source is toluene, cools to room temperature with the furnace and obtains nano-iron oxide/carbon compound cathode materials powder.The PVdF of the obtained iron oxide/carbon composite material of 70 wt.%, the acetylene black of 15 wt.% and 15 wt.% is mixed, make slurry, be evenly coated on Copper Foil, after vacuum drying, be stamped into circular electrode pole piece, be to electrode with lithium metal, 1 mol/L LiPF
6/ DMC+DEC+EC(volume ratio is 1:1:1) be electrolyte, Celgard 2400 is barrier film, composition test cell.Constant current charge-discharge test is carried out to battery, charging/discharging voltage scope is 0.01 ~ 2.5 V, result shows, it has good chemical property, under the current density of 0.1 A/g, first discharge specific capacity and charge specific capacity are respectively 1271.1 and 846.7 mAh/g, and the specific capacity of material after 20 times that circulates still maintains 908.3 mAh/g, and the cyclical stability of material comparatively iron oxide cathode material improves a lot.
Claims (3)
1. the preparation method of an iron oxide cathode material for lithium ion battery, it is characterized in that preparing by sol-gel process and constant pressure and dry the iron oxide presoma possessing xerogel or aerogel structure, again in conjunction with Technology for Heating Processing, preparation iron oxide cathode material, by carbon cladding process, prepare ferriferous oxide/carbon compound cathode materials further, concrete technology step is:
(1) solution is configured: select inorganic molysite, take required quality, be dissolved in a certain amount of absolute ethyl alcohol, then add a certain amount of deionized water, stir formation orange solution;
Described inorganic molysite is FeCl
3, FeCl
36H
2o, Fe (NO
3)
3with Fe (NO
3)
39H
2o;
Described absolute ethyl alcohol and deionized water addition, make absolute ethyl alcohol and deionized water and Fe
3+the ratio of amount of substance control respectively: absolute ethyl alcohol/Fe
3+=20 ~ 150, deionized water/Fe
3+=4 ~ 20;
(2) under agitation, in solution, drip a certain amount of expoxy propane, uniform stirring certain hour, after leaving standstill, form gel;
Described expoxy propane addition, makes expoxy propane and Fe
3+the ratio of amount of substance control: expoxy propane/Fe
3+=5 ~ 14;
(3) adding absolute ethyl alcohol in the gel formed to step (2) carries out aging, replaces absolute ethyl alcohol, repeat 2 ~ 6 times every 24h;
(4) gel after aging in step (3) is carried out constant pressure and dry, obtain precursor product;
(5), under air atmosphere, the precursor product of step (4) gained is warming up to 400 ~ 900 DEG C of insulation 1 ~ 6h, cools to room temperature with the furnace and obtain nano-sized iron oxide negative electrode material powder.
2. the preparation method of iron oxide cathode material for lithium ion battery according to claim 1, is characterized in that: the constant pressure and dry described in step (4) is under room temperature and 80 DEG C of environment dry 1 ~ 3 day successively.
3. the preparation method of iron oxide cathode material for lithium ion battery according to claim 1, is characterized in that: the iron oxide cathode material powder described in utilization, by carrying out carbon cladding process, can prepare iron oxide/carbon composite material; Described carbon cladding process comprises chemical vapour deposition technique, hydro thermal method, sol-gel process or mechanical attrition method.
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| CN103618069B (en) * | 2013-11-28 | 2016-04-27 | 扬州大学 | The preparation method of the coated di-iron trioxide lithium ion battery negative material of a kind of lithium titanate |
| CN104300113A (en) * | 2014-08-11 | 2015-01-21 | 苏州大学 | Carbon-coated iron oxide lithium-ion-battery electrode, and preparation method and application thereof |
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| CN107665979A (en) * | 2017-08-24 | 2018-02-06 | 浙江工业大学 | A kind of cathode of lithium battery prepared based on iron cement and preparation method thereof |
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| CN111193026A (en) * | 2020-01-08 | 2020-05-22 | 河南城建学院 | Preparation method of fusiform iron oxide single crystal nano material |
| CN111960474A (en) * | 2020-07-30 | 2020-11-20 | 内蒙古凯金新能源科技有限公司 | Iron oxide negative electrode material and preparation method thereof |
| CN112421044B (en) * | 2020-11-20 | 2021-12-10 | 北京理工大学重庆创新中心 | Core-shell structure sulfur positive electrode material, preparation method and application in lithium-sulfur battery |
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| "以环氧化合物为凝胶促进剂制备块状氧化铁气凝胶";任洪波等;《原子能科学技术》;20070531;第41卷(第3期);第288-291页 * |
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