CN106450237B - A kind of preparation and application of anode composite material of lithium sulfur battery - Google Patents

A kind of preparation and application of anode composite material of lithium sulfur battery Download PDF

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CN106450237B
CN106450237B CN201611118740.0A CN201611118740A CN106450237B CN 106450237 B CN106450237 B CN 106450237B CN 201611118740 A CN201611118740 A CN 201611118740A CN 106450237 B CN106450237 B CN 106450237B
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composite material
mesomorphic
lithium
tio
anode
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CN106450237A (en
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李亚峰
陈凯翔
魏明灯
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Fuzhou University
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Fuzhou University
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • 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

Abstract

The present invention provides a kind of preparation of anode composite material of lithium sulfur battery and applications, using simple one step hydro thermal method synthesizing titanate presoma, using titanate in 60-80o7-8 d, synthesizing anatase phase TiO are stirred under C water-bath2Mesomorphic recycles TiO2Mesomorphic with S is compound prepares lithium sulfur battery anode material.Prepared TiO2The composite material of mesomorphic and S have good cyclical stability as the lithium-sulfur cell that anode obtains, and when current density is 1670 mA/g, charge and discharge cycles 500 are enclosed capacity and stablized in 327.4 mAh/g, and the capacity of average every circle is only 0.085%.

Description

A kind of preparation and application of anode composite material of lithium sulfur battery
Technical field
The invention belongs to supercapacitor fields, and in particular to a kind of preparation of anode composite material of lithium sulfur battery and answer With.
Background technique
As the following very promising battery product, lithium-sulfur cell receives more and more people with its high capacity and energy density Concern.However for many years, due to the unique electrochemical behavior of lithium-sulfur cell itself, lead to the continuous loss of capacity and lower Coulombic efficiency.Porous carbon materials are widely used in lithium-sulfur cell, it is believed that passing through the duct of carbon or the physics of interlayer Suction-operated can limit the loss of elemental sulfur and polysulfide.Although this short-term that acts on, can play the more sulphur of limitation The diffusion of compound, but final polysulfide still can be diffused into cathode from anode.Thus inventing the new base material of one kind becomes The extremely urgent task of lithium-sulfur cell development.The present invention uses Anatase TiO2Mesomorphic with S is compound is preparing lithium-sulfur cell just Pole material, obtained lithium-sulfur cell have good cyclical stability.
Do not have also at present and utilizes TiO2Mesomorphic is reported as the related patents of lithium-sulfur cell substrate.
Summary of the invention
The purpose of the present invention is to provide the preparation and application of a kind of novel anode composite material of lithium sulfur battery, the present invention is adopted With simple one step hydro thermal method synthesizing titanate presoma, using titanate in 60-80o7-8 d is stirred under C water-bath, is synthesized sharp Titanium ore phase TiO2Mesomorphic recycles TiO2Mesomorphic with S is compound prepares lithium sulfur battery anode material.Prepared TiO2Mesomorphic and S's Composite material has good cyclical stability as the lithium-sulfur cell that anode obtains, and fills when current density is 1670 mA/g Discharge cycles 500 are enclosed capacity and are stablized in 327.4 mAh/g, and the capacity of average every circle is only 0.085%.
Specific preparation method includes the following steps:
(1) by 0.5-1.0g anatase TiO2Powder is scattered in 50-100mL 15M KOH solutions, and 10-15 points of stirring It is transferred to after clock in the autoclave of the polytetrafluoroethyllining lining of ml containing 75-100, in 150-200oIt is reacted 72-84 hours in C, gained Sediment is through 0.1 M H2SO4Solution washing is for several times to pH to 1-2, and centrifuge separation comes out, then in 60-80oIn C air It is 12-16 hours dry, obtain titanate nanowire；
(2) 1 M H is dispersed by the titanate nanowire of 200 mg2SO4In solution, in 60-80oHeating water bath stirs under C 7-8d is mixed, gained white depositions are centrifugated after deionized water is washed several times and come out after natural cooling, then in air 60-80oObtain Anatase TiO within C dry 12-16 hours2Mesomorphic；
(3) by TiO2After mesomorphic is with several minutes of 4:6-8 multiple grinding in mass ratio of elemental sulfur, it is put into full of the closed of argon gas Reaction vessel, in 150-160o12-18 h is reacted under C, obtains anode composite material of lithium sulfur battery.
Application of the composite material in lithium-sulfur cell, concrete application method are as follows:
Battery assembly: mesomorphic TiO in mass ratio2- S compound: Kynoar: acetylene black=70:20:10 mixed grinding It is equably coated on aluminium foil afterwards and does anode, reference electrode and be lithium metal to electrode, electrolyte is the DOL of 1M LiTFSI: DME(1:1 v%)+1wt%LiNO3Solution.All assemblings carry out in glove box.
Remarkable advantage of the invention is: TiO prepared by the present invention2Mesomorphic has unique micropore and secondary mesopore knot Structure, relative to commercialized TiO2With common mesoporous TiO2For can more effectively accommodate active material elemental sulfur, and limit more The loss of sulfide, it is steady be more good circulation compared with the lithium-sulfur cell that the composite material of elemental sulfur is obtained as anode Qualitative, when current density is 1670 mA/g, charge and discharge cycles 500 are enclosed capacity and are stablized in 327.4 mAh/g, the appearance of average every circle Amount is only 0.085%.The present invention provides a kind of preparation methods of lithium sulfur battery anode material, and this method base material is novel, Synthesis process mild condition (60-80oC), cycle performance of battery is preferable, there is good development prospect.
Detailed description of the invention
Fig. 1 is 1 mesomorphic TiO of embodiment2And TiO2The X-ray diffraction spectrogram of-S compound.
Fig. 2 is 1 Anatase mesomorphic TiO of embodiment2Scanning electron microscope (SEM) photograph.
Fig. 3 is 1 mesomorphic TiO of embodiment2The scanning electron microscope (SEM) photograph of-S compound.
Fig. 4 is 1 mesomorphic TiO of embodiment2- S compound transmission electron microscope picture.
Fig. 5 is 1 mesomorphic TiO of embodiment2Distribution diagram of element of-S the compound under transmission electron microscope, O-K, S-K, Ti-K, Respectively indicate the distribution situation of tri- kinds of elements of O, S, Ti.
Fig. 6 is 1 mesomorphic TiO of embodiment2The hot weight curve of-S compound.
Fig. 7 is 1 mesomorphic TiO of embodiment2The electrochemistry cycle performance figure of-S compound under 1 C multiplying power.
Specific embodiment
The present invention is further illustrated by the following examples, but protection scope of the present invention is not limited to following reality Apply example.
Embodiment 1
A kind of preparation method of anode composite material of lithium sulfur battery, specifically comprises the following steps:
(1) by 0.5 g anatase TiO2Powder is scattered in 50 mL 15M KOH solutions, and stirring is transferred to after ten minutes to be contained In the autoclave of 75 ml polytetrafluoroethyllining linings, 180oIt is reacted 72 hours in C, gained sediment is through 0.1 M H2SO4It is molten Liquid washing is for several times to pH to 1-2, and centrifuge separation comes out, then 70oC air drying 12 hours, obtain titanate nanometer Line；
(2) 1 M H is dispersed by the titanate nanowire of 200 mg2SO4In solution, 70oWater-bath heating stirring under C 7d, gained white depositions are centrifugated after deionized water is washed several times and come out after natural cooling, and then in air 70oC Obtain Anatase TiO within dry 12 hours2Mesomorphic；
(3) by TiO2After mesomorphic is with several minutes of 4:6 multiple grinding in mass ratio of elemental sulfur, it is put into full of the closed of argon gas Reaction vessel, 155o12h is reacted under C, obtains anode composite material of lithium sulfur battery.
Application of the composite material in lithium-sulfur cell, concrete application method are as follows: battery assembly: mesomorphic TiO in mass ratio2-S Compound: Kynoar: being equably coated on aluminium foil after acetylene black=70:20:10 mixed grinding and do anode, reference electrode and It is lithium metal to electrode, electrolyte is DOL:DME=1:1 v%+ 1wt%LiNO of 1M LiTFSI3Solution, all assemblings are equal It is carried out in glove box.
TiO2The composite material of mesomorphic and S have good cyclical stability as the lithium-sulfur cell that anode obtains, in electricity Charge and discharge cycles 500 are enclosed capacity and are stablized in 327.4 mAh/g when current density is 1670 mA/g, and the capacity of average every circle is only 0.085%。
Embodiment 2
A kind of preparation method of anode composite material of lithium sulfur battery, specifically comprises the following steps:
(1) by 0.8g anatase TiO2Powder is scattered in 80 mL 15M KOH solutions, and stirring is transferred to after 12 minutes containing 90 In the autoclave of ml polytetrafluoroethyllining lining, 150oIt is reacted 80 hours in C, gained sediment is through 0.1 M H2SO4Solution is washed It washs for several times to pH to 1-2, and is centrifugated and comes out, then 60oC air drying 14 hours, obtain titanate nanowire；
(2) 1 M H is dispersed by the titanate nanowire of 200 mg2SO4In solution, 60oWater-bath heating stirring under C 7d, gained white depositions are centrifugated after deionized water is washed several times and come out after natural cooling, and then in air 60oC Obtain Anatase TiO within dry 14 hours2Mesomorphic；
(3) by TiO2After mesomorphic is with several minutes of 4:7 multiple grinding in mass ratio of elemental sulfur, it is put into full of the closed of argon gas Reaction vessel, 150o16h is reacted under C, obtains anode composite material of lithium sulfur battery.
Application of the composite material in lithium-sulfur cell, concrete application method are as follows: battery assembly: mesomorphic TiO in mass ratio2-S Compound: Kynoar: being equably coated on aluminium foil after acetylene black=70:20:10 mixed grinding and do anode, reference electrode and It is lithium metal to electrode, electrolyte is DOL:DME=1:1 v%+ 1wt%LiNO of 1M LiTFSI3Solution, all assemblings are equal It is carried out in glove box.
Embodiment 3
A kind of preparation method of anode composite material of lithium sulfur battery, specifically comprises the following steps:
(1) by 1.0g anatase TiO2Powder is scattered in 100mL 15M KOH solution, and stirring is transferred to after 15 minutes to be contained In the autoclave of 100 ml polytetrafluoroethyllining linings, 200oIt is reacted 84 hours in C, gained sediment is through 0.1 M H2SO4It is molten Liquid washing is for several times to pH to 1-2, and centrifuge separation comes out, then 80oC air drying 16 hours, obtain titanate nanometer Line；
(2) 1 M H is dispersed by titanate nanowire2SO4In solution, 80oWater-bath heating stirring 8d, naturally cold under C But gained white depositions are centrifugated and come out after deionized water is washed several times after, and then in air 80oC dry 16 is small When obtain Anatase TiO2Mesomorphic；
(3) by TiO2After mesomorphic is with several minutes of 4:8 multiple grinding in mass ratio of elemental sulfur, it is put into full of the closed of argon gas Reaction vessel, 160o18 h are reacted under C, obtain anode composite material of lithium sulfur battery.
Application of the composite material in lithium-sulfur cell, concrete application method are as follows: battery assembly: mesomorphic TiO in mass ratio2-S Compound: Kynoar: being equably coated on aluminium foil after acetylene black=70:20:10 mixed grinding and do anode, reference electrode and It is lithium metal to electrode, electrolyte is DOL:DME=1:1 v%+ 1wt%LiNO of 1M LiTFSI3Solution, all assemblings are equal It is carried out in glove box.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with Modification, is all covered by the present invention.

Claims (3)

1. a kind of preparation method of anode composite material of lithium sulfur battery, which is characterized in that specific preparation method includes the following steps:
(1) by 0.5-1.0g anatase TiO2Powder is scattered in 50-100mL 15M KOH solution, is turned after stirring 10-15 minutes Enter in the autoclave of the polytetrafluoroethyllining lining containing 75-100ml, is reacted 72-84 hours in 150-200 DEG C, gained sediment warp 0.1M H2SO4Solution washing is for several times to pH to 1-2, and centrifuge separation comes out, then in 60-80 DEG C of air drying 12-16 Hour, obtain titanate nanowire；
(2) 1M H is dispersed by titanate nanowire2SO4In solution, water-bath heating stirring 7-8d, natural cooling at 60-80 DEG C Gained white depositions are centrifugated and come out after deionized water is washed several times afterwards, then 60-80 DEG C of dry 12-16 in air Hour obtains Anatase TiO2Mesomorphic；
(3) by TiO2After mesomorphic is with several minutes of 4:6-8 multiple grinding in mass ratio of elemental sulfur, it is put into closed anti-full of argon gas Container is answered, 12-18 h is reacted at 150-160 DEG C, obtains anode composite material of lithium sulfur battery.
2. anode composite material of lithium sulfur battery made from a kind of preparation method as described in claim 1.
3. a kind of application of composite material as claimed in claim 2 in lithium-sulfur cell, which is characterized in that concrete application method Are as follows: battery assembly: Anatase TiO in mass ratio2The anode composite material of mesomorphic and sulphur: Kynoar: acetylene black=70: It is equably coated on aluminium foil after 20:10 mixed grinding and does anode, reference electrode and be lithium metal, electrolyte 1M to electrode DOL:DME=1:1 v%+ 1wt%LiNO of LiTFSI3Solution, all assemblings carry out in glove box.
CN201611118740.0A 2016-12-08 2016-12-08 A kind of preparation and application of anode composite material of lithium sulfur battery Expired - Fee Related CN106450237B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103840143A (en) * 2014-03-19 2014-06-04 中南大学 Preparation method of S/TiO2 composite material for anode of sodium-sulfur battery
CN104009238A (en) * 2014-06-20 2014-08-27 福州大学 Method for in-situ synthesis of compound of rutile TiO2 mesocrystal and graphene
CN104058453A (en) * 2014-06-19 2014-09-24 浙江大学 Size-controllable spherical anatase type TiO2 mesocrystal and preparation method thereof
JP2014214037A (en) * 2013-04-24 2014-11-17 独立行政法人産業技術総合研究所 Titanium polysulfide-carbon composite
CN105047889A (en) * 2015-07-06 2015-11-11 华南师范大学 Method for preparing lithium-sulfur battery cathode material
CN105810918A (en) * 2016-05-27 2016-07-27 福建师范大学 Method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014214037A (en) * 2013-04-24 2014-11-17 独立行政法人産業技術総合研究所 Titanium polysulfide-carbon composite
CN103840143A (en) * 2014-03-19 2014-06-04 中南大学 Preparation method of S/TiO2 composite material for anode of sodium-sulfur battery
CN104058453A (en) * 2014-06-19 2014-09-24 浙江大学 Size-controllable spherical anatase type TiO2 mesocrystal and preparation method thereof
CN104009238A (en) * 2014-06-20 2014-08-27 福州大学 Method for in-situ synthesis of compound of rutile TiO2 mesocrystal and graphene
CN105047889A (en) * 2015-07-06 2015-11-11 华南师范大学 Method for preparing lithium-sulfur battery cathode material
CN105810918A (en) * 2016-05-27 2016-07-27 福建师范大学 Method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite

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