CN108511716A - A kind of Medical Devices - Google Patents

A kind of Medical Devices Download PDF

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CN108511716A
CN108511716A CN201810265944.XA CN201810265944A CN108511716A CN 108511716 A CN108511716 A CN 108511716A CN 201810265944 A CN201810265944 A CN 201810265944A CN 108511716 A CN108511716 A CN 108511716A
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lithium vanadium
vanadium compound
compound
doping lithium
fat measurement
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王楹
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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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0537—Measuring body composition by impedance, e.g. tissue hydration or fat content
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • 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
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M4/366—Composites as layered products
    • 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
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • 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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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Heart & Thoracic Surgery (AREA)
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Abstract

The present invention provides a kind of portable medical devices comprising bodily fat measurement component, compared with existing bodily fat measurement equipment, service life, stability and safety are significantly improved.

Description

A kind of Medical Devices
Technical field
The present invention relates to field of medical device, more particularly to a kind of Medical Devices with bodily fat measurement component.
Background technology
As the improvement of people's living standards, health is increasingly becoming emphasis of people's attention, and healthy consumption also becomes and disappears Take one of the mainstream in market.With the increase of income, domestic medical device, especially portable medical device are also by more families Front yard is received, and the service life of household Medical Devices and safety then become researcher's problem in the urgent need to address.
Invention content
The present invention provides a kind of portable medical devices comprising bodily fat measurement component is set with the detection of existing body fat Standby to compare, service life, stability and safety are significantly improved.
Specific scheme is as follows：
A kind of portable medical device comprising bodily fat measurement component, the bodily fat measurement component include bodily fat measurement group Part and power supply element, it is characterised in that：The bodily fat measurement component includes electrical measurement element.
Further, the portable medical device is shaped to scale.
Further, the power supply element include electrolyte, the power supply element further include anode, cathode with And it is placed in the diaphragm between positive and negative electrode, it is 1 that the solvent of the electrolyte, which is volume ratio,:1:2:2 EC/PC/DEC/DMC mixing Solvent, electrolytic salt LiBF4, LiBOB mixing lithium salts, wherein LiBF4For main electrolytic salt, a concentration of 0.8-1.5M, LiBOB is auxiliary electrolytic salt, and a concentration of 0.2-0.3M, electrolyte further includes additive, which is following formula (1) table The compound for the compound B that the compound A and following formula (2) shown is indicated,
Wherein, R1、R2、R3Separately indicate CnH2n-1、CnF2n+1At least one of, wherein 3<n<8, and R1、R2、 R3At least one of include CnF2n+1, the mass contents of compound A in the composite are 5-15%, and B is compound for the compound Mass content in object is 85%-95%.
Further, provide with the matched anode of above-mentioned electrolyte, it is described anode include positive electrode active materials, it is described Positive electrode active materials are doping lithium vanadium compound/graphene composite material, which has the grain shape of a word capitate, Spherical or almost spherical adjacent doping lithium vanadium compound shaping particles are the end particle at the both ends of a word capitate, are coated on and mix The graphene of miscellaneous lithium vanadium compound particle surface forms thin graphene conductive network, is located at above-mentioned adjacent elements doped lithium vanadium chemical combination Graphene between composition granule is configured to connect the handle linkage section of the word hammer of above-mentioned doping lithium vanadium compound end particle, the handle The sectional dimension of shape linkage section is less than the grain size of the doping lithium vanadium compound end particle at both ends, the doping lithium vanadium compound particle Grain size be 300-800nm, the thickness of the thin layer is 15-30nm, and the cross-sectional maximum dimension of the handle linkage section is 150- 600nm。
Further, doping lithium vanadium compound is the compound that following general formula (3) indicates：
LiV1-x-yMxSnyPO4-zF2z (3)
Wherein, M is selected from least one of the group that is formed of Ti, Cr, Mn, Ni, Al, Mg, Cu, Zn element, and 0<x<0.327, 0<y<0.363,0<z<0.116.
Further, the preparation method of above-mentioned doping lithium vanadium compound is provided comprising following steps：It is counted according to chemistry Amount ball milling 2-8 hours under solvent medium, is put in an oven later than weighing raw material lithium source, the sources V, the sources M, the sources Sn, phosphorus source mixing In 50-80 DEG C of predrying 1-3 hours, sol-gel precursor is obtained, is spray-dried later, precursor powder is obtained；It will Presoma is heated up in the inert gas of certain mixed volume ratio and the mixed atmosphere of fluorine gas with the 1-10 DEG C/min rates of heat addition, It is heat-treated 6-30 hours in 600-800 DEG C of constant temperature, cools to room temperature with the furnace, LiV is made1-x-yMxSnyPO4-zF2zProduct.
Further, the M is selected from Al.
Further, the Mn is selected from Mg.
Further, Ball-milling Time is 8-10 hours.
Further, the preparation method of above-mentioned positive electrode active materials is provided comprising following steps：
A doping lithium vanadium compound particle) is prepared, which has spherical or almost spherical granulated Shape；
B the concentrated sulfuric acid) is added in the reaction vessel, the artificial squama of the quality of the 30%-50% of concentrated sulfuric acid quality is added later Piece graphite is slowly dropped into hydrogen peroxide, the addition of hydrogen peroxide in mass after being stirred evenly under subfreezing temperature condition Be 0.2-0.3 times of concentrated sulfuric acid quality, continue stirring 1-3 hour, later using heating water bath, temperature rise to 50-60 DEG C it is subsequent Continuous stirring 1 hour, is slowly added dropwise deionized water and is diluted, 1.5-2 times before the volume of mixed liquor becomes undiluted, It is sufficiently stirred, 0.05-0.1 times of potassium permanganate of concentrated sulfuric acid quality is added later, stirs, filters, dries, obtain It is uniform to be added to ultrasonic disperse in acetone, obtains graphene oxide point by graphene oxide powder for above-mentioned graphene oxide powder Dispersion liquid；
C) by step A) obtained doping lithium vanadium compound particle is added to step B) obtained graphene oxide dispersion In, it stirs, obtains mixed slurry, wherein adulterate the quality of lithium vanadium compound and graphene oxide in mixed slurry Than for 85-95:5-15, filtering, drying, is dried with 50-80 DEG C of temperature in drying box, obtains elements doped lithium vanadium chemical combination The hydrofluoric acid aqueous solution that mass concentration is 15-25% is added in above-mentioned presoma by object/graphene oxide composite material presoma, Once being etched, the time is 2-6 hours, and gained etch product is cleaned, and removes the hydrofluoric acid of surface, filter, It is dry, the composite material precursor product after once being etched；
D) by step C) obtained by precursor product be added in ethyl alcohol and carry out ultrasonic disperse processing, the time of supersound process is 3-8 hours, supersonic frequency 30KHz-80KHz, filtering, drying obtained powdered presoma；
E) by step D) 2.5-3.5 times of N- methyl pyrroles of the precursor powder quality are added in obtained powdered presoma In pyrrolidone, stirring is allowed to uniformly mixed, obtains anode sizing agent；
F) by step E) obtained anode sizing agent is coated in as on the aluminium foil of plus plate current-collecting body, with 50-60 DEG C of temperature Drying 3-8 hours is heat-treated 6-18 hours with 180-360 DEG C of temperature in vacuum condition, graphite oxide is reduced to have later There is the graphene of cross linked porous structure, the graphene coated is in doping lithium vanadium compound particle surface and is formed as adjacent doping Connection structure between lithium vanadium compound particle, to obtain the positive forerunner that plus plate current-collecting body surface is coated with positive electrode Body；
G) by step F) obtained positive presoma is immersed in the hydrofluoric acid aqueous solution that mass concentration is 25-35%, into Row is secondarily etched, and the time is 5-8 hours, and positive presoma is taken out, the hydrofluoric acid on cleaning removal positive presoma surface, true It is dried 5-8 hours with 60-80 DEG C of temperature under empty condition, is obtaining film of the plus plate current-collecting body surface coated with positive electrode material layer just Pole, wherein the positive electrode is doping lithium vanadium compound/graphene composite material, which has a word capitate Grain shape, spherical or almost spherical adjacent doping lithium vanadium compound shaping particles are the end at the both ends of a word capitate Grain is coated on the etched rear formation thin graphene conductive network of graphene of doping lithium vanadium compound particle surface, is located at upper The graphene between adjacent doping lithium vanadium compound particle is stated to be configured to connect the one of above-mentioned doping lithium vanadium compound end particle The handle linkage section of word hammer.
Further, the grain size of the doping lithium vanadium compound particle is 800nm.
Further, the thickness of the thin layer is 18nm.
Further, the cross-sectional maximum dimension of the handle linkage section is 600nm.
Further, the power supply element in the present invention can be rechargeable power supply element, such as lithium secondary battery.
The present invention also provides a kind of application of bodily fat measurement component in portable medical device, the bodily fat measurement structures Part is aforementioned bodily fat measurement component.
The present invention has the advantages that：
1, step B of the present invention) in so that artificial crystalline flake graphite is sequentially contacted with the concentrated sulfuric acid, hydrogen peroxide, potassium permanganate Gradually, the progressive multiple mode of oxidizing of segmentation, be prepared with layered structure, the high graphite oxide of activity, be conducive to Primary etching in subsequent technique and reduction on a current collector, form the graphene of high conductivity.
2, step C of the present invention) in will doping lithium vanadium compound/graphene oxide composite material once etched, pass through Control etching condition, can be in step B) specific position on the surface of the high activity that is prepared layering graphite oxide forms etching Position is induced, the controllability of etch product form secondarily etched in subsequent technique is improved, enhances the reliability of product and steady It is qualitative.
3, step G of the present invention) in preforming membrane electrode is immersed in hydrofluoric acid aqueous solution carry out it is secondarily etched, lead to The inductive effect crossed control etching condition and once etched, doping lithium vanadium compound of the formation with a word capitate grain shape/ Graphene composite material, since doping lithium vanadium compound surface forms thin graphene structure by etching, so that active Material grains have high conductivity, disclosure satisfy that high magnification (high-power) demand of power supply element.Meanwhile for composite wood It is recessed due to being formed by the graphene with high conductivity between adjacent doping lithium vanadium compound particle for expecting global shape Sunken " thin handle " structure, thus under conditions of long-time high magnification is run, since the graphene of " the thin handle " has height Electric conductivity, thus preferably conductive path is provided, form the inductive effect of electrical conduction so that active material particle surface It is preferentially stacked at the graphene position of " the thin handle " by the constantly regenerating SEI films of the redox reaction of electrolyte, with The prior art is compared, effectively inhibit active material particle surface SEI films under high magnification service condition thicken and morphological disruption, It can thus remain to keep higher capacity maintenance rate under conditions of (high-power) operation of long-time high magnification.
5, the composite electrolyte lithium salts in electrolyte of the invention and additive are the compound of boracic, and mentioned component exists Positive electrode surface in subsequent chemical synthesis technology produces synergistic effect during forming complete S EI films, is formed in positive electrode surface Intact, the fine and close SEI films of configuration of surface, the charge and discharge application being adapted under high pressure, high current, and follow in long-term charge and discharge The integrality of SEI can be kept under ring.
6, there is due to v element in charge and discharge cycles high voltage platform, thus can using vanadium doping electrode active material So that the electrode material has the charging voltage more than 4.3, the energy in electrode can be fully discharged.
7, the sources M include the electrical conductivity that element can further increase positive electrode, are conducive to be large current discharge, while can To reduce the cost of material, the high-rate discharge ability of battery is significantly improved.
8, fluorine can improve positive electrode crystal surface morphology, enhance the compatibility of positive electrode and electrolyte, improve lithium The conducting power of ion, to improve positive electrode large current discharging capability and cyclical stability.
The present invention through the above scheme, provides the body that a kind of service life, stability and safety are significantly improved Fat measures component and its Medical Devices.
Specific implementation mode
The present invention will be described in more detail below by specific embodiment, but protection scope of the present invention not by It is limited to these embodiments.
Description of the drawings
It is the structural schematic diagram of the grain shape of doping lithium vanadium compound/graphene composite material of the present invention in Fig. 1.
Fig. 2 is doping lithium vanadium compound/graphene composite material material SEM photograph prepared by the embodiment of the present invention 1.
Fig. 3 is doping lithium vanadium compound/graphene composite material material SEM photograph prepared by the embodiment of the present invention 2.
The embodiment tested the performance of the power supply element in the present invention is as follows：
Lithium ion power supplies element, and the power supply element includes anode, cathode and is placed between anode, cathode Diaphragm, positive electrode active materials, conductive agent and the binder that the anode is prepared comprising following embodiment, the cathode includes negative Pole active material, binder.Diaphragm is polypropylene, polyethylene composite membrane；Cathode is artificial graphite；Electrolyte is following embodiment The electrolyte of preparation.
Embodiment 1
1) electrolyte, is prepared：The solvent of electrolyte is that volume ratio is 1:1:2:2 EC/PC/DEC/DMC mixed solvents, electricity Solution matter salt is LiBF4, LiBOB mixing lithium salts, wherein LiBF4For main electrolytic salt, a concentration of 0.8M, LiBOB are auxiliary Electrolytic salt, a concentration of 0.2M, electrolyte further include additive, which is the compound A and following formula that following formula (1) indicates (2) compound of the compound B indicated,
Wherein, R1 C3H5, R2 and R3 be C3F7, the mass contents of compound A in the composite are 5%, the chemical combination The mass contents of object B in the composite are 95%.
2) positive electrode active materials, are prepared：
A) raw material Li is weighed according to stoichiometric ratio2CO3、V2O5、Al2O3、SnO2, phosphoric acid mixing, the ball under ethanol medium Mill 6 hours is put in an oven in 65 DEG C of predryings 1.5 hours, obtains sol-gel precursor, it is dry to carry out spraying later later It is dry, obtain precursor powder；By presoma volume ratio be 85:In 15 nitrogen and the mixed atmosphere of fluorine gas, with 10 DEG C/min The rate of heat addition heats up, and is heat-treated 28 hours in 850 DEG C of constant temperature, cools to room temperature with the furnace, and doping lithium vanadium compound is made LiV0.560Al0.128Sn0.312PO3.972F0.056, the doping lithium vanadium compound is with spherical or almost spherical grain shape；
B the concentrated sulfuric acid) is added in the reaction vessel, the artificial scale stone of 30% quality of concentrated sulfuric acid quality is added later Ink, is slowly dropped into hydrogen peroxide after being stirred evenly under subfreezing temperature condition, the addition of hydrogen peroxide in mass is dense 0.2 times of sulfuric acid quality continues stirring 1-3 hours, and heating water bath, temperature is used to continue stirring 1 hour after rising to 50 DEG C later, Deionized water is slowly added dropwise to be diluted, 1.5 times before the volume of mixed liquor becomes undiluted, is sufficiently stirred, Zhi Houjia 0.1 times of potassium permanganate for entering concentrated sulfuric acid quality, stirs, filters, dries, obtain graphene oxide powder, will be upper Stating graphene oxide powder, to be added to ultrasonic disperse in acetone uniform, obtains graphene oxide dispersion；
C) by step A) obtained doping lithium vanadium compound particle is added to step B) obtained graphene oxide dispersion In, it stirs, obtains mixed slurry, wherein adulterate the quality of lithium vanadium compound and graphene oxide in mixed slurry Than being 85:15, filtering, drying are dried in drying box with 60 DEG C of temperature, and doping lithium vanadium compound/oxidation stone is obtained Above-mentioned presoma is added the hydrofluoric acid aqueous solution that mass concentration is 15%, is once etched by black alkene composite material precursor, Time is 2 hours, and gained etch product is cleaned, and removes the hydrofluoric acid of surface, and filtering, drying are once carved Composite material precursor product after erosion；
D) by step C) obtained by precursor product be added in ethyl alcohol and carry out ultrasonic disperse processing, the time of supersound process is 3 hours, supersonic frequency 80KHz, filtering, drying obtained powdered presoma；
E) by step D) 2.5 times of N- crassitudes of the precursor powder quality are added in obtained powdered presoma In ketone, stirring is allowed to uniformly mixed, obtains anode sizing agent；
F) by step E) obtained anode sizing agent is coated in as on the aluminium foil of plus plate current-collecting body, with 50 DEG C of temperature drying It 5 hours, is heat-treated 18 hours with 200 DEG C of temperature in vacuum condition later, graphite oxide is reduced to have cross linked porous knot The graphene of structure, the graphene coated is in doping lithium vanadium compound particle surface and is formed as adjacent doping lithium vanadium compound Connection structure between grain, to obtain the positive presoma that plus plate current-collecting body surface is coated with positive electrode；
G) by step F) obtained positive presoma is immersed in the hydrofluoric acid aqueous solution that mass concentration is 25%, carry out two Secondary etching, time are 5 hours, and positive presoma is taken out, the hydrofluoric acid on cleaning removal positive presoma surface, in vacuum condition Under dried 6 hours with 60 DEG C of temperature, obtain film anode of the plus plate current-collecting body surface coated with positive electrode material layer, wherein institute It is doping lithium vanadium compound/graphene composite material to state positive electrode.
Embodiment 2
1) electrolyte, is prepared：The solvent of electrolyte is that volume ratio is 1:1:2:2 EC/PC/DEC/DMC mixed solvents, electricity Solution matter salt is LiBF4, LiBOB mixing lithium salts, wherein LiBF4For main electrolytic salt, a concentration of 1.2M, LiBOB are auxiliary Electrolytic salt, a concentration of 0.3M, electrolyte further include additive, which is the compound A and following formula that following formula (1) indicates (2) compound of the compound B indicated,
Wherein, R1 C3H5, R2 and R3 be C3F7, the mass contents of compound A in the composite are 15%, the change It is 85%% to close the mass contents of object B in the composite.
2) positive electrode active materials, are prepared：
A) raw material Li OH, V is weighed according to stoichiometric ratio2O3、TiO2、SnO2, ammonium dihydrogen phosphate mixing, in ethanol medium Lower ball milling 7 hours is put in an oven in 75 DEG C of predryings 1 hour, obtains sol-gel precursor, spray later later It is dry, obtain precursor powder；By presoma volume ratio be 90:In 10 argon gas and the mixed atmosphere of fluorine gas, with 10 DEG C/ The min rates of heat addition heat up, and are heat-treated 25 hours in 900 DEG C of constant temperature, cool to room temperature with the furnace, and doping lithium vanadium compound is made LiV0.596Ti0.111Sn0.293PO3.975F0.0.050, the doping lithium vanadium compound is with spherical or almost spherical grain shape；
B the concentrated sulfuric acid) is added in the reaction vessel, the artificial scale stone of 50% quality of concentrated sulfuric acid quality is added later Ink, is slowly dropped into hydrogen peroxide after being stirred evenly under subfreezing temperature condition, the addition of hydrogen peroxide in mass is dense 0.3 times of sulfuric acid quality continues stirring 3 hours, uses heating water bath, temperature to continue stirring 1 hour after rising to 60 DEG C later, delays The slow deionized water that is added dropwise is diluted, and 2 times before the volume of mixed liquor becomes undiluted, is sufficiently stirred, is added later dense 0.1 times of potassium permanganate of sulfuric acid quality, stirs, filters, dries, obtain graphene oxide powder, by above-mentioned oxygen It is uniform that graphite alkene powder is added to ultrasonic disperse in acetone, obtains graphene oxide dispersion；
C) by step A) obtained doping lithium vanadium compound particle is added to step B) obtained graphene oxide dispersion In, it stirs, obtains mixed slurry, wherein adulterate the quality of lithium vanadium compound and graphene oxide in mixed slurry Than being 90:10, filtering, drying are dried in drying box with 80 DEG C of temperature, and doping lithium vanadium compound/oxidation stone is obtained Above-mentioned presoma is added the hydrofluoric acid aqueous solution that mass concentration is 20%, is once etched by black alkene composite material precursor, Time is 3 hours, and gained etch product is cleaned, and removes the hydrofluoric acid of surface, and filtering, drying are once carved Composite material precursor product after erosion；
D) by step C) obtained by precursor product be added in ethyl alcohol and carry out ultrasonic disperse processing, the time of supersound process is 8 hours, supersonic frequency 60KHz, filtering, drying obtained powdered presoma；
E) by step D) 3.5 times of N- crassitudes of the precursor powder quality are added in obtained powdered presoma In ketone, stirring is allowed to uniformly mixed, obtains anode sizing agent；
F) by step E) obtained anode sizing agent is coated in as on the aluminium foil of plus plate current-collecting body, with 60 DEG C of temperature drying It 8 hours, is heat-treated 8 hours with 280 DEG C of temperature in vacuum condition later, graphite oxide is reduced to have cross linked porous knot The graphene of structure, the graphene coated is in doping lithium vanadium compound particle surface and is formed as adjacent doping lithium vanadium compound Connection structure between grain, to obtain the positive presoma that plus plate current-collecting body surface is coated with positive electrode；
G) by step F) obtained positive presoma is immersed in the hydrofluoric acid aqueous solution that mass concentration is 30%, carry out two Secondary etching, time are 6 hours, and positive presoma is taken out, the hydrofluoric acid on cleaning removal positive presoma surface, in vacuum condition Under dried 5 hours with 80 DEG C of temperature, obtain film anode of the plus plate current-collecting body surface coated with positive electrode material layer, wherein institute It is doping lithium vanadium compound/graphene composite material to state positive electrode.
Embodiment 3
1) electrolyte, is prepared：The solvent of electrolyte is that volume ratio is 1:1:2:2 EC/PC/DEC/DMC mixed solvents, electricity Solution matter salt is LiBF4, LiBOB mixing lithium salts, wherein LiBF4For main electrolytic salt, a concentration of 1M, LiBOB are auxiliary electricity Matter salt is solved, a concentration of 0.25M, electrolyte further includes additive, which is the compound A and following formula that following formula (1) indicates (2) compound of the compound B indicated,
Wherein, R1, R2 are C3H5, R3 C3F7, the mass contents of compound A in the composite are 10%, the chemical combination The mass contents of object B in the composite are 90%.
2) positive electrode active materials, are prepared：
A) raw material Li is weighed according to stoichiometric ratio2CO3、VO2、MgO、SnO2, diammonium hydrogen phosphate mixing, in ethanol medium Lower ball milling 5 hours is put in an oven in 80 DEG C of predryings 1 hour, obtains sol-gel precursor, spray later later It is dry, obtain precursor powder；By presoma volume ratio be 80:In 20 argon gas and the mixed atmosphere of fluorine gas, with 10 DEG C/ The min rates of heat addition heat up, and are heat-treated 25 hours in 1000 DEG C of constant temperature, cool to room temperature with the furnace, and doping lithium vanadium compound is made LiV0.536Mg0.196Sn0.268PO3.937F0.126, the doping lithium vanadium compound is with spherical or almost spherical grain shape；
B the concentrated sulfuric acid) is added in the reaction vessel, the artificial scale stone of 36% quality of concentrated sulfuric acid quality is added later Ink, is slowly dropped into hydrogen peroxide after being stirred evenly under subfreezing temperature condition, the addition of hydrogen peroxide in mass is dense 0.35 times of sulfuric acid quality continues stirring 5 hours, and heating water bath, temperature is used to continue stirring 1 hour after rising to 75 DEG C later, Deionized water is slowly added dropwise to be diluted, 3 times before the volume of mixed liquor becomes undiluted, is sufficiently stirred, is added later 0.3 times of potassium permanganate of concentrated sulfuric acid quality, stirs, filters, dries, obtain graphene oxide powder, will be above-mentioned It is uniform that graphene oxide powder is added to ultrasonic disperse in acetone, obtains graphene oxide dispersion；
C) by step A) obtained doping lithium vanadium compound particle is added to step B) obtained graphene oxide dispersion In, it stirs, obtains mixed slurry, wherein adulterate the quality of lithium vanadium compound and graphene oxide in mixed slurry Than being 65:35, filtering, drying are dried in drying box with 70 DEG C of temperature, and doping lithium vanadium compound/oxidation stone is obtained Above-mentioned presoma is added the hydrofluoric acid aqueous solution that mass concentration is 28%, is once etched by black alkene composite material precursor, Time is 6 hours, and gained etch product is cleaned, and removes the hydrofluoric acid of surface, and filtering, drying are once carved Composite material precursor product after erosion；
D) by step C) obtained by precursor product be added in ethyl alcohol and carry out ultrasonic disperse processing, the time of supersound process is 6 hours, supersonic frequency 80KHz, filtering, drying obtained powdered presoma；
E) by step D) 2.5 times of N- crassitudes of the precursor powder quality are added in obtained powdered presoma In ketone, stirring is allowed to uniformly mixed, obtains anode sizing agent；
F) by step E) obtained anode sizing agent is coated in as on the aluminium foil of plus plate current-collecting body, with 75 DEG C of temperature drying It 6 hours, is heat-treated 16 hours with 380 DEG C of temperature in vacuum condition later, graphite oxide is reduced to have cross linked porous knot The graphene of structure, the graphene coated is in doping lithium vanadium compound particle surface and is formed as adjacent doping lithium vanadium compound Connection structure between grain, to obtain the positive presoma that plus plate current-collecting body surface is coated with positive electrode；
G) by step F) obtained positive presoma is immersed in the hydrofluoric acid aqueous solution that mass concentration is 35%, carry out two Secondary etching, time are 8 hours, and positive presoma is taken out, the hydrofluoric acid on cleaning removal positive presoma surface, in vacuum condition Under dried 8 hours with 75 DEG C of temperature, obtain film anode of the plus plate current-collecting body surface coated with positive electrode material layer, wherein institute It is doping lithium vanadium compound/graphene composite material to state positive electrode.
Comparative example 1；
Using the doping lithium vanadium compound of surface cladding cracking carbon as positive electrode active materials, electrolyte EC：PC：DEC= 2:1:1, lithium salts is 1M lithium hexafluoro phosphates, remaining is same as Example 1.
Following table is the test data of embodiment and comparative example, and circulating current 0.1-0.5C, operating temperature is room temperature (25 DEG C) or high temperature (60 DEG C), charge cutoff voltage 4.5V, discharge cut-off voltage 2.5V.As it can be seen that with the comparative example using artificial graphite Compare, power supply element of the invention still maintains higher capacity conservation rate after being used for a long time, and under high temperature environment it is not on fire, It does not explode, service life, stability and safety are significantly improved.
Although present disclosure is discussed in detail by above preferred embodiment, but it would be recognized that above-mentioned Description be not considered as limitation of the present invention.
Table 1
Although present disclosure is discussed in detail by above preferred embodiment, but it would be recognized that above-mentioned Description be not considered as limitation of the present invention.

Claims (5)

1. a kind of portable medical device comprising bodily fat measurement component, the bodily fat measurement component include bodily fat measurement component And power supply element, it is characterised in that：The bodily fat measurement component includes electrical measurement element.
2. Medical Devices as described in claim 1, it is characterised in that：The portable medical device is shaped to scale.
3. Medical Devices as described in claim 1, it is characterised in that：The power supply element includes electrolyte, described dynamic Power supply element further includes anode, cathode and the diaphragm being placed between positive and negative electrode, and the solvent of the electrolyte is that volume ratio is 1:1:2:2 EC/PC/DEC/DMC mixed solvents, electrolytic salt LiBF4, LiBOB mixing lithium salts, wherein LiBF4Based on Electrolytic salt, a concentration of 0.8-1.5M, LiBOB are auxiliary electrolytic salt, and a concentration of 0.2-0.3M, electrolyte further includes adding Add agent, the compound for the compound B which is the compound A that following formula (1) indicates and following formula (2) indicates,
Wherein, R1、R2、R3Separately indicate CnH2n-1、CnF2n+1At least one of, wherein 3<n<8, and R1、R2、R3In It is at least one include CnF2n+1, the mass contents of compound A in the composite are 5-15%, and compound B is in the composite Mass content be 85%-95%.
4. electrolyte as described in claim 1, the anode includes positive electrode active materials, and the positive electrode active materials are to mix Miscellaneous lithium vanadium compound/graphene composite material, which has the grain shape of a word capitate, spherical or almost spherical Adjacent doping lithium vanadium compound shaping particles are the end particle at the both ends of a word capitate, are coated on doping lithium vanadium compound particle The graphene on surface forms thin graphene conductive network, the graphite being located between above-mentioned adjacent doping lithium vanadium compound particle Alkene is configured to connect the handle linkage section of the word hammer of above-mentioned doping lithium vanadium compound end particle, the section ruler of the handle linkage section The grain size of the very little doping lithium vanadium compound end particle less than both ends, the grain size of the doping lithium vanadium compound particle is 300- The thickness of 800nm, the thin layer are 15-30nm, and the cross-sectional maximum dimension of the handle linkage section is 150-600nm.
5. a kind of application of bodily fat measurement component in portable medical device, it is characterised in that：The bodily fat measurement component is Bodily fat measurement component described in any one of claim 1,3-4.
CN201810265944.XA 2018-03-28 2018-03-28 A kind of Medical Devices Withdrawn CN108511716A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380121A (en) * 2019-07-26 2019-10-25 谢中淮 A kind of electrolyte composition and its battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380121A (en) * 2019-07-26 2019-10-25 谢中淮 A kind of electrolyte composition and its battery

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Application publication date: 20180907