Gel polymer electrolyte for lithium current sources

FIELD: electricity.

SUBSTANCE: gel polymer electrolyte may be used in the manufacture of primary lithium and secondary current sources, and in supercapacitors. The method is performed by using amorphous perfluoropolyether as a polymer matrix.

EFFECT: increase electrolyte homogeneity and increasing lithium diffusion coefficient in it, increased conductivity, high chemical and electrochemical stability.

1 tbl

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to a composite solid electrode based on phases that are crystallisable in a Bi2O3-BaO-Fe2O3 system. The electrolyte contains, mol %: Bi2O3 - 67-79, BaO - 17-22, Fe2O3 - 2-16. The invention also relates to versions of a method of producing the electrolyte.

EFFECT: said materials have higher conductivity in the medium temperature range.

3 cl, 1 tbl, 9 dwg

Supercapacitor // 2523425

FIELD: electricity.

SUBSTANCE: invention refers to electric engineering and can be applied in mobile communication devices as a reusable DC source. Proposed supercapacitor is made in the form of thing film structure including electrodes separated by solid electrolyte film, where zirconium dioxide stabilised by yttrium is selected as solid electrolyte, graphene nanoparticles comprise one electrode, and second electrode is made of conductive polymer, polypyrrol.

EFFECT: increased specific energy of capacitor.

1 dwg

FIELD: electricity.

SUBSTANCE: supercapacitor is made of composite containing nano-sized LiMn2-xMexO4 oxide where Me=Ni2+, Mn3+, and solid composite electrolyte and conductive black for symmetrical version of supercapacitor. For asymmetrical version of supercapacitor, negative electrode is made of nano-sized manganese oxide MnO2 and separated by solid electrolyte based on lithium perchlorinate 0.4LiClO4 - 0.6Al2O3.In addition, supercapacitor includes current feed line made out of two metal nickel plates attached to external sides of electrodes.

EFFECT: improved specific electric capacitance of supercapacitor in a wide temperature range.

2 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: claimed invention relates to a ceramic membrane, conducting alkaline cations, in which at least a part of the surface is covered with a layer of an organic cation-conducting polyelectrolyte, which is insoluble and chemically stable in water at basic pH. The invention also relates to an electrochemical device, which includes such membrane, used as a solid electrolyte, which contacts with liquid electrolyte, consisting of a water solution of alkali metal hydroxide.

EFFECT: increase of a battery capacity per weight unit by limitation of water electrolyte volume due to placement of a thin layer of respective polymer on the boundary, between the solid and water electrolyte.

12 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention relates to power engineering, particularly to preparation of compositions which contain lithium fluoride, bromide and molybdate, where in order to widen the range of concentrations with a low melting point, lithium tungstate is added, with the following ratio of components, wt %: lithium fluoride 6.34-7.03, lithium bromide 76.28-79.61, lithium tungstate 4.85-9.59, lithium molybdate 4.47-11.84.

EFFECT: composition ensures operating capacity of electrolyte of a chemical current source with a relatively wide range of concentration of components.

1 tbl, 6 ex

FIELD: electricity.

SUBSTANCE: cathode material contains a layered compound of graphite and chrome (VI) oxide - (C8CrO3), an electroconductive additive and a polymer binder; the electroconductive additive is represented by graphite; the polymer binder is represented by secondary cellulose acetate; the components ratio is as follows, wt %: layered compound of graphite and chrome (VI) oxide - C8CrO3 - 5.0-70.0, graphite - 2.0-63.0, secondary cellulose acetate - 9.0-90.0. Produced are flexible ultra-thin (0.2-1 cm) film electrodes electric conductance whereof varies within the interval of (2-20)·10-3 Ohm·cm-1.

EFFECT: decrease of the cathode material thickness when used in the form of ultra-thin environmentally friendly films in ultra-small current sources with a solid electrolyte.

2 tbl, 6 ex

FIELD: electricity.

SUBSTANCE: solid-state electrochemical current source contains anode made of metal, cathode made as graphitic layer applied on the anode, and current-conductive coating of graphitic layer. The graphitic layer is made in the form of defected oriented film with crystal graphite structure, herewith, there is no oxide layer on the anode.

EFFECT: fabricability, higher current source capacity.

23 cl, 1 ex

FIELD: electricity.

SUBSTANCE: in a composite mix containing a polymer base, the secondary cellulose acetate, an ionogenic additive and acetone, the ionogenic additive is Lil salt with the following content of components, wt %: Secondary cellulose acetate 5.24-9.79; Acetone 47.62-89.1; Ionogenic additive, salt Lil 1.11-47.14.

EFFECT: increased electric conductivity, simplified technology of solid electrolyte production.

8 ex, 2 tbl

FIELD: electricity.

SUBSTANCE: according to the invention, the chemical current source comprises an anode of alkaline or alkali-earth metal, for instance, lithium (Li), a cathode of a mixture of several elements of electric negative subgroups of V-VI groups of the Periodical system of elements, or one of these elements, for instance, sulfur (S), tellurium (Te), a solid electrolyte arranged between them and made of a chemical compound with ionic conductivity, or a mixture of chemical compounds of anode and cathode substance, and also current collectors, the cathode additionally includes an electrolyte that contains a cation of anode substance, at the same time the amount of the electrolyte introduced into the cathode makes from 10% to 70% from the cathode volume, and the cathode is made of two zones: the first zone bordering with the solid electrolyte, containing a mixture of the cathode substance with electrolyte, and the second zone bordering with the first one, containing an electron conductor apart from the specified substances.

EFFECT: increased time of discharge and capacitance of chemical sources of current.

3 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: invention may be used in various electrotechnical devices operating in area of high temperatures, using rubidium or rubidium-containing materials as a working substance. According to invention, a solid electrolyte comprises rubidium monoferrite with addition of multi-charge cations of V group of periodic system in amount of 0.3-1.6 at.%. Composition of solid electrolyte meets a common formula Rb2-2xFe2-x"Э"VxO4, where x=0.025-0.125.

EFFECT: reduced specific resistance of solid electrolyte at higher temperatures.

2 cl, 2 ex

FIELD: electricity.

SUBSTANCE: method lies in the delivery of signals from a microcontroller (MC) to address inputs of the switch, sequential connection of the switch to two adjacent outputs of an accumulator cell (AC) with their voltage control wherein upon connection of the switch an additional floating common bus with a voltage of an adjacent output of the controlled AC and measuring buses are formed, AC voltage difference at the buses is shifted in a sequence in a positive direction, then in a negative one, in regard to the floating common bus using a current generator controlled by voltage. In AB control process a measuring path is calibrated and stabilised by the installation of a reference voltage source (RVS) to a thermostat, and at AB control voltage of even AC is inverted. The device for automatic control comprises a switch, RVS, MC, a decoder with a galvanic isolation unit, additional common and measuring buses connected to two devices for signal level shifting on the basis of RVS and a voltage-controlled current source using a high-voltage transistor. At that keys for the through calibration of the path are introduced to the device and RVS is installed in the thermostat.

EFFECT: increased accuracy and reliability of control.

7 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: active material of positive electrode for electric device comprises the first active material and the second active material. The first active material contains transition metal oxide represented by the formula (1): Li1.5[NiaCobMnc[Li]d]O3 …(1), where in the formula (1) a, b, c and d meet the following ratios: 0<d<0.5; a+b+c+d=1.5; and 1.0<a+b+c<1.5. The second active material consists of transition metal oxide of spinel type represented by the formula (2) and having crystalline structure referred to space group Fd-3m: LiMa'Mn2-a'O4 …(2), where in the formula (2) M is metal element with valency 2-4, and a' meets the following ratio: 0≤a'<2.0. Relative content of the first active material and the second active material meets by weight ratio the ratio represented by the following formula (3): 100:0<MA:MB<0:100…(3) (where in the formula (3) MA is mass of the first active material and MB is mass of the second active material).

EFFECT: improving charge-discharge efficiency of the accumulator battery made of the above material.

13 cl, 4 dwg, 6 tbl

FIELD: electricity.

SUBSTANCE: claimed invention is referred to a device and a method for accumulator battery manufacturing, and namely to an electrode stacker and an electrode stacking method. The suggested device (110) stacks a positive electrode (20) and a negative electrode (30) in a sequence in order to form an energy-generating element. The device is equipped with a detector (200) for detecting the positive electrode position (24) as the first electrode in regard to the electrode pack, which has a spacer (40) as a shell with the positive electrode in it and a stacking unit (112), and (122) for stacking the positive electrode (24) as the first electrode on top of the negative electrode (30) as the second electrode. A positive electrode feed table (120) is designed to correct the position of the electrode (20) in plane.

EFFECT: improved positioning accuracy of the positive and negative electrodes in regard to the spacer (40) is the technical result of the invention.

19 cl, 25 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a composite solid electrode based on phases that are crystallisable in a Bi2O3-BaO-Fe2O3 system. The electrolyte contains, mol %: Bi2O3 - 67-79, BaO - 17-22, Fe2O3 - 2-16. The invention also relates to versions of a method of producing the electrolyte.

EFFECT: said materials have higher conductivity in the medium temperature range.

3 cl, 1 tbl, 9 dwg

FIELD: power industry.

SUBSTANCE: invention relates to methods of obtaining electric energy and can be used for creation of sea power plant for conversion of potential energy of sea water ions to the electric current energy, and also for creation of converters of energy of plasma ions into electric energy. In the electric energy obtaining method consisting in placement of two electrodes in ionised electrically neutral medium, in separation of free charged particles of the ionised electrically neutral medium depending on the charge sign, transfer of charges of charged particles to electrodes and transmission of electric current between electrodes along the external circuit of energy consumer load, separation of charged particles is performed by electric field of the contact potential difference between surfaces of electrodes, and transfer of electric charge from charged particles to electrodes is performed by neutralisation of charged particles on surfaces of electrodes achieved by selection of material of the negative electrode with the electron work function eφ- greater than the affinity energy S of negative particles (eφ->S), and a positive electrode with the work function of electron from the surface eφ+ less than the energy of ionisation eVi of positive ions (eφ+<eVi). The offered method by the operating principle does not restrict the service life of the charge capacitance. When using sea water as electrolyte the energy source is unlimited.

EFFECT: improvement of efficiency of the method of obtaining of electric energy from the natural ionised medium - sea water - which is used as electrolyte.

1 dwg

Lead-acid battery // 2553974

FIELD: electricity.

SUBSTANCE: essence of the claimed invention consists in new design of electrodes ensuring improved specific capacity by weight. The central parts of electrodes (bearing and current-carrying cores) are made of another light electroconductive and strong metal, not lead but aluminium for example. The above cores may be thin and made of aluminium foil. Active substances are applied to surface of the bearing cores as thin layers. With the same volume of accumulator, when thickness of the cores and layers of active substances reduces square area of electrode surfaces increases essentially thus ensuring better conditions for electrochemical reactions. In order to exclude contact of electrolyte with metal of the cores the latter are coated by additional protective and electroconductive layer, for example, of graphite. Lead-acid battery with electrodes of the suggested design looks like a thin multiply band, which may be turned into a spiral in order to optimize dimensions of the whole device.

EFFECT: increased specific capacitance.

3 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to lithium-carrying iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and element, formed from them, to a method of their production, characterised by the stage of nano-milling, at which the micrometric mixed aggregates of the nanometric particles are formed by means of micro-forging. The invention also relates to electrodes and a Li-ionic electrochemical element.

EFFECT: application of claimed invention makes it possible to produce electrode materials making it possible to achieve practical energy density, which is higher than 140 W h/kg, in the lithium-ionic element which can be used to form thick electrodes at the industrial scale.

26 cl, 7 dwg, 1 tbl, 6 ex

FIELD: electricity.

SUBSTANCE: invention is related to the electric engineering industry and may be used for the development and further operation of accumulators and accumulator batteries of different types in independent power supply systems of space vehicles, in particular of artificial Earth satellites (AES). The technical result consists in the reduced mismatch of capacity for separate accumulators. The set task is solved by the design of the AES accumulator battery consisting of n in-series accumulators and heat-transfer devices of a heat pipe type and incorporation of an evaporating section of heat-transfer devices into central areas of accumulator electrode units and heat contact of capacitors of the heat-transfer devices with cases of the accumulators. The claimed design of the accumulator battery for AES allows the reduction of temperature difference inside the accumulator (so called temperature gradient) thus leading to the reduced mismatch in capacity of individual accumulators.

EFFECT: increased permitted safe cycling depth, which is equal to the decreased degradation of the battery specific energy.

6 dwg

Accumulator battery // 2546654

FIELD: electricity.

SUBSTANCE: positive electrode has an active material of positive electrode which operates at the potential 4.5 V or higher with reference to lithium; and liquid electrolyte contains the fluorinated simple ether represented by the following formula (1), and the cyclic sulphonate represented by the following formula (2): (1). And in the formula (1) R1 and R2, both independently, designate alkylene group or the fluorinated alkylene group, and, at least, either R1 or R2 is the fluorinated alkylene group; and (2) where in the formula (2) A and B, both independently, designate alkylene group or the fluorinated alkylene group, and X designates unary bond or the group - OSO2-.

EFFECT: battery includes a positive electrode which can absorb and emit lithium, and liquid electrolyte.

10 cl, 1 dwg, 5 tbl, 35 ex

FIELD: transport.

SUBSTANCE: invention relates to hybrid transport facility storage battery controller. Proposed method comprises the steps that follow. Making of the first ICE temperature control circuit. Making of traction battery temperature control circuit. Heating of said traction battery by heater arranged in said second circuit in line with the pump, radiator and traction battery. Besides, it comprises the step of electric power transfer to heater via converter in first temperature control circuit from the motor when storage battery temperature drops below preset level. Proposed system comprises two temperature control circuits. First circuit heater makes the part of second circuit. Said heater is supplied via converter from aforesaid motor.

EFFECT: simplified design.

9 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: declared invention relates to the electrodes, electric power accumulation devices containing such electrodes and to methods of manufacture of electrodes and the electric power accumulation devices. Electrodes contain a current collector, a conductive mat and the first and second electrically active materials, and the first electrically active material has higher energy density, than the second electrically active material, and the second electrically active material has an ability to higher charging-discharging rate, than the first electrically active material. The conductive mat can provide a structural and conductive support for at least one of electrically active materials with high energy and high charging-discharging rate, meanwhile the conductive mat contains a porous grid from interconnected conductive fibres that provides stability of the fibrous mat against shift and rupture of the mat due to rupture strength of fibres.

EFFECT: electrodes can be provisioned in various configurations and can be used in high-rate and high-energy electric power accumulation devices with ensuring of improved cyclic resource.

15 cl, 21 dwg, 4 tbl

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