CN104118856B - A kind of Mg 0.5+y(Co 0.5yv 0.5yti 1-y) 2(PO 4) 3magnesium cell anode material and preparation method thereof - Google Patents
A kind of Mg 0.5+y(Co 0.5yv 0.5yti 1-y) 2(PO 4) 3magnesium cell anode material and preparation method thereof Download PDFInfo
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- CN104118856B CN104118856B CN201410335155.0A CN201410335155A CN104118856B CN 104118856 B CN104118856 B CN 104118856B CN 201410335155 A CN201410335155 A CN 201410335155A CN 104118856 B CN104118856 B CN 104118856B
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a kind of Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material, described positive electrode material is prepared from by following methods: 1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water; Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve; 2) by step 1) each solution mixing of gained, vigorous stirring 4 ~ 8h at 70 ~ 80 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 80 ~ 100 DEG C; 3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 3 ~ 5h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 20 ~ 26h, obtains black powder and is Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material; Wherein, y=0.1 ~ 0.5.The positive electrode material that the present invention prepares has good loading capacity and capability retention.
Description
Technical field
The present invention relates to the preparation field of secondary cell, particularly, the present invention relates to a kind of Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material and preparation method thereof.
Background technology
In recent years, along with the development of consumer electronics, power tool and power truck, the demand of market to battery constantly increases.In current existing battery system, zinc-manganse dioxide dry cell mercury pollution is outstanding, capacity is not high, be not suitable for long-time heavy-current discharge, and the price of zinc is higher.Contain harmful elements Pb and Cd in plumbic acid and nickel-cadmium cell, to environment, there is potential danger.Be that the battery exploitation of main representative achieves great progress with lithium ion battery, and be widely applied to every field.But because Li is active especially, be easy at negative pole precipitating metal Li when lithium ion battery is used for high current charge-discharge, thus cause potential safety hazard.This is just in the urgent need to the development & application of cheapness, safety, environmental protection and heavy-duty battery.In this context, Mg secondary cell one of optionally, receives the attention of scientific research personnel.Present magnesium cell is still in the preliminary study stage, there is many open questions.Wherein the synthesis of novel anode material and the Electrochemical Properties in magnesium cell system thereof are wherein one of important research directions.
Relative to Li
+, Mg
2+electric density large, solvation is even more serious, and the positive electrode material that therefore great majority may be used for lithium secondary battery all can not directly apply to Mg secondary cell.General employing lithium as secondary cell positive electrode material have following several: transient metal sulfide and organic sulfide, transition metal oxide, organism or there is the phosphoric acid salt Mg of NASICION structure
0.5ti
2(PO
4)
3(MTP), but above-mentioned positive electrode material all has certain disadvantages, and such as transient metal sulfide as positive electrode material major defect is: prepare more difficult, require high―temperature nuclei under vacuum or argon gas atmosphere; Easily be corroded compared with oxide compound, its oxidative stability is undesirable.However, its good charge-discharge performance has become desirable insertion/deintercalation material.Oxide compound is as the positive electrode material Shortcomings of Mg secondary cell: Mg
2+the kinetic rate embedded is very slow; Concerning most material, Mg in discharge process
2+embedding degree low; Most intercalated material cycle performance is bad, can decompose very soon in the circulating cycle.Organism and traditional without machine battery MnO
2, HgO, CuO, Ag
2o etc. compare the capacity had, and have good low-temperature performance, but along with the rising of temperature, cell container and cell voltage all can decline.For the phosphoric acid salt Mg with NASICION structure
0.5ti
2(PO
4)
3(MTP), Mg
2+can at Mg
0.5ti
2(PO
4)
3in reversible embedding/deintercalation, but their reversibilitys are subject to Mg
2+the kinetics restriction of diffusion.
Summary of the invention
The object of the invention is to, a kind of Mg is provided
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material and preparation method thereof, this positive electrode material has good loading capacity and capability retention.
For achieving the above object, present invention employs following technical scheme:
A kind of Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material, described positive electrode material is prepared from by following methods:
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 4 ~ 8h at 70 ~ 80 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 80 ~ 100 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 3 ~ 5h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 20 ~ 26h, obtains black powder and is Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material;
Wherein, y=0.1 ~ 0.5.
Preferably, described y=0.5.
Preferably, described step 2) in, after each solution mixing, vigorous stirring 6h at 75 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 90 DEG C.
Preferably, described step 3) in, after passing into gas mixture, pre-burning 4h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 24h.
Present invention also offers a kind of Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3the preparation method of magnesium cell anode material, described method comprises the steps:
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 4 ~ 8h at 70 ~ 80 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 80 ~ 100 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 3 ~ 5h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 20 ~ 26h, obtains black powder and is Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material;
Wherein, y=0.1 ~ 0.5.
Preferably, described y=0.5.
Preferably, described step 2) in, after each solution mixing, vigorous stirring 6h at 75 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 90 DEG C.
Preferably, described step 3) in, after passing into gas mixture, pre-burning 4h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 24h.
Magnesium cell anode material prepared by the present invention first loading capacity can reach 210mAh/g, and capability retention is more than 90%, and most high energy reaches 96.2%.
Accompanying drawing explanation
Fig. 1 is the XRD figure that difference mixes sample under cobalt vanadium amount;
Embodiment
With embodiment, the present invention is further detailed explanation below.
Embodiment 1
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 8h at 70 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 100 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 5h at 500 DEG C, finally at 700 DEG C of calcination 26h, obtains black powder and is Mg
0.6(Co
0.05v
0.05ti
0.9)
2(PO
4)
3magnesium cell anode material.
Embodiment 2
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 4h at 80 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 80 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 5h at 300 DEG C, finally at 700 DEG C of calcination 20h, obtains black powder and is Mg
0.7(Co
0.1v
0.1ti
0.8)
2(PO
4)
3magnesium cell anode material.
Embodiment 3
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 6h at 75 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 90 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 4h at 400 DEG C, finally at 700 DEG C of calcination 24h, obtains black powder and is Mg
0.8(Co
0.15v
0.15ti
0.7)
2(PO
4)
3magnesium cell anode material.
Embodiment 4
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 5h at 78 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 90 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 4h at 400 DEG C, finally at 700 DEG C of calcination 24h, obtains black powder and is Mg
0.9(Co
0.2v
0.2ti
0.6)
2(PO
4)
3magnesium cell anode material.
Embodiment 5
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 6h at 75 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 90 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 4h at 400 DEG C, finally at 700 DEG C of calcination 24h, obtains black powder and is Mg (Co
0.25v
0.25ti
0.5)
2(PO
4)
3magnesium cell anode material.
Comparative example 1
Mg is prepared according to the method identical with the application
0.5ti
2(PO
4)
3, carry out electric performance test.
Comparative example 2
Mg is prepared according to the method identical with the application
0.5co
2(PO
4)
3, carry out electric performance test.
Comparative example 3
Mg is prepared according to the method identical with the application
0.5co
2(PO
4)
3, carry out electric performance test.
Comparative example 4
Mg is prepared according to the method identical with the application
0.5(V
0.5ti
0.5)
2(PO
4)
3, carry out electric performance test.
Comparative example 5
Mg is prepared according to the method identical with the application
0.5(Co
0.5ti
0.5)
2(PO
4)
3, carry out electric performance test.
Comparative example 6
Mg is prepared according to the method identical with the application
0.5(V
0.5co
0.5)
2(PO
4)
3, carry out electric performance test.
The sign of sample
The thing phase of synthetic materials is analyzed, Cu target (λ=0.154056nm), pipe pressure 20kV, pipe stream 40mA with the automatic X-ray diffractometer of X ' PertPRO type (Holland produces).With MDIJade5.0 and Origin8.0, analyzing and processing is carried out to XRD data.The magnesium cell anode material of y=0.6 or 0.7 or 0.8 prepared by the sample prepared embodiment 1-5, the employing method identical with embodiment 3 has carried out XRD test, and result as shown in Figure 1.Be respectively in Fig. 1 y=0.1,0.2,0.3,0.4,0.5,0.6,0.7, the X-ray diffraction spectrum of 0.8.As can be seen from the figure, during y=0.1 ~ 0.5, Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3the XRD diffractogram of magnesium cell anode material and the main peaks of base peak substantially identical, when y=0.6 ~ 0.8, Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3the XRD diffractogram of magnesium cell anode material has other impurity peaks; By analysis, impurity component be can not determine.Therefore, when y is in 0.1 ~ 0.5 scope, Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material crystalline structure does not change, and as y>0.5, occur not clear impurity peaks, crystalline structure is influenced.
Electric performance test
Sample obtained to embodiment 1-5 and comparative example 1-6 and acetylene black and poly(vinylidene fluoride) (PVDF) are mixed by the mass ratio of 75:15:10 and puts into agate mortar and grind even and add appropriate organic solvent NMP (N-Methyl pyrrolidone), after grinding to form homogeneous paste thing, evenly be coated on positive pole disk, at 95 DEG C, vacuum-drying 4h obtains positive plate.In the glove box being full of high-purity argon, with metal magnesium sheet for negative pole, microporous polypropylene membrane Celgard2400 is barrier film, with 0.25mol/LMg (AlCl
2buEt)
2tHF solution be electrolytic solution, be assembled into experimental cell, carry out charge and discharge cycles test, result is as shown in table 1.
The magnesium cell anode material electric performance test result that table 1 embodiment 1-5 and comparative example 1-6 is obtained
As can be seen from the above table, the loading capacity of mixing the magnesium cell anode material after cobalt vanadium increases along with the increase of mixing cobalt vanadium amount.Capability retention after 500 discharge cycles is more than 90%, and most high energy reaches 96.2%.
Claims (8)
1. a Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material, described positive electrode material is prepared from by following methods:
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 4 ~ 8h at 70 ~ 80 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 80 ~ 100 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 3 ~ 5h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 20 ~ 26h, obtains black powder and is Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material;
Wherein, y=0.1 ~ 0.5.
2. Mg according to claim 1
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material, is characterized in that, described y=0.5.
3. Mg according to claim 1
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material, is characterized in that, described step 2) in, after each solution mixing, vigorous stirring 6h at 75 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 90 DEG C.
4. Mg according to claim 1
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material, is characterized in that, described step 3) in, after passing into gas mixture, pre-burning 4h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 24h.
5. a Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3the preparation method of magnesium cell anode material, described method comprises the steps:
1) by Mg:Co:V:Ti:PO in gained magnesium cell anode material molecular formula
4 3-mol ratio, take MgCO
3, (NH
4)
2hPO
4, and Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES and NH
4vO
3, by MgCO
3(NH
4)
2hPO
4be dissolved in deionized water, Jing Ti/Bao Pian COBALT NITRATE CRYSTALS/FLAKES is dissolved in citric acid, NH
4vO
3be dissolved in hot water;
Take Ti (C
4h
9o)
4, and in the ratio dehydrated alcohol of 1:4 by Ti (C
4h
9o)
4dissolve;
2) by step 1) each solution mixing of gained, vigorous stirring 4 ~ 8h at 70 ~ 80 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 80 ~ 100 DEG C;
3) grinding of light yellow xerogel to be placed in atmosphere tube type stove and to pass into N
2-H
2gas mixture, pre-burning 3 ~ 5h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 20 ~ 26h, obtains black powder and is Mg
0.5+y(Co
0.5yv
0.5yti
1-y)
2(PO
4)
3magnesium cell anode material;
Wherein, y=0.1 ~ 0.5.
6. method according to claim 5, is characterized in that, described y=0.5.
7. method according to claim 5, is characterized in that, described step 2) in, after each solution mixing, vigorous stirring 6h at 75 DEG C, makes its generation yellow sol of dewatering, carries out drying, obtain light yellow xerogel at 90 DEG C.
8. method according to claim 5, is characterized in that, described step 3) in, after passing into gas mixture, pre-burning 4h at 300 ~ 500 DEG C, finally at 700 DEG C of calcination 24h.
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| CN104124433B (en) * | 2014-07-14 | 2016-06-15 | 中国科学院青海盐湖研究所 | A kind of Mg0.5+y(Co0.5yV0.5yTi1-y)2(PO4)3Magnesium cell anode material and preparation method thereof |
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|---|---|---|---|---|
| CN102593429A (en) * | 2011-01-08 | 2012-07-18 | 孙建之 | Method for preparing magnesium vanadium phosphate of anode materials for rechargeable magnesium battery |
| CN102931403A (en) * | 2012-11-08 | 2013-02-13 | 上海交通大学 | Application method of titanium magnesium phosphate in anode material of chargeable magnesium battery |
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| WO2011150093A1 (en) * | 2010-05-25 | 2011-12-01 | Pellion Technologies Inc. | Electrode materials for magnesium batteries |
| KR101268501B1 (en) * | 2010-09-15 | 2013-06-04 | 한양대학교 산학협력단 | Cathode active material for lithium secondary battery, method for manufacturing the same and lithium secondary battery using the same |
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| CN102593429A (en) * | 2011-01-08 | 2012-07-18 | 孙建之 | Method for preparing magnesium vanadium phosphate of anode materials for rechargeable magnesium battery |
| CN102931403A (en) * | 2012-11-08 | 2013-02-13 | 上海交通大学 | Application method of titanium magnesium phosphate in anode material of chargeable magnesium battery |
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