RU2580510C2 - Linear energy accumulation and storage module for autonomous power supply of electrotechnical devices and equipment - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to an energy accumulation and storage device, which can be used as part of linear autonomous systems that convert sunlight directly into electricity. Linear energy accumulation and storage module for autonomous power supply of electrical devices and equipment consists of two electrodes, coated with metal-organic structure (MOF) based on copper, a porous separator, wherein entire surface of MOF-structure and porous separator are impregnated with ionic liquid.

EFFECT: use of MOF-structure with ionic liquid provides higher capacitance of module during its operation in wide range of operating temperatures.

1 cl, 1 dwg

Description

The invention relates to the field of electrical engineering, in particular to technology and equipment for storing and storing energy for autonomous power supply of electrical devices and equipment. The accumulation of energy is carried out by the electrochemical method. By applying a highly porous metal-organic framework with a high specific area (J. Am. Chem. Soc., 2010, DOI: 10.1021 / ja1074322) to the electrodes of the linear energy storage module, its ability to accumulate and retain an electric charge is increased. The drive is made in the form of a piece of cable of a fixed length, depending on the conditions of its practical application.

State of the art

Of the modern analogues, similar in the way of energy storage, are known:

1. The graphene-based supercapacitor is an ionistor. In ionistors, the material that accumulates an electric charge is graphene (English graphene), which is a single layer of carbon atoms connected by sp ² bonds into a hexagonal two-dimensional crystal lattice. Accumulation of charge occurs between adjacent graphene layers. Significant disadvantages of ionistors include (http://www.powerinfo.ru/electric-layer.php):

- low energy density;

- low operating voltage;

- high level of self-discharge.

Lithium batteries using various classes of cathode materials and electro-chemical layout schemes. Significant disadvantages of these batteries include:

- memory effect;

- exposure to explosive effect;

- restrictions on the depth of discharge;

- limited number (<1000) of charge / discharge cycles.

When individual supercapacitors or lithium batteries are combined into a linear structure more than a meter long, the reliability of their operation will significantly decrease to achieve the required operational characteristics, since failure of one element will entail a failure of all equipment.

SUMMARY OF THE INVENTION A linear energy storage and storage module for autonomous power supply of electrical devices and equipment comprises two Cu ₃ (HITP) coated metal-organic frame structures (Batten SR, Champness NR, Chen X.-M., Garcia-Martinez J., Kitagawa S., Ohrstrom L., O'Keeffe M., Suh MP, Reedijk J. Coordination polymers, metal-organic frameworks and the need for terminology guidelines // CrystEngComm. - 2012 .-- Vol. 14. - P. 3001- 3004), separated by a separator and impregnated with an ionic liquid electrode. The ratio of the thicknesses of the metal-organic frame structure on the electrodes is selected as: 1 / 1.62, where: 1 is the thickness of the material on the external electrode, and 1.62 - on the internal electrode. This ratio of the thickness of the layers is chosen to ensure equality of the areas of the working surfaces of the drive electrodes. Two layers of a metal-organic frame structure are separated by a separator with a thickness of 0.05 mm. The pore size of the separator is smaller than the minimum particle size of the metal-organic frame structure, which is a black insoluble powder. This powder is applied to the electrodes. To obtain a highly elastic coating of a given thickness, the entire volume of the metal-organic frame structure and the separator are impregnated with 1Me3BuImBF ₄ ionic liquid.

The principle of operation of the electric energy storage mechanism is based on the concentration of ions charged from an external current source in two layers of a metal-organic frame structure and an ionic liquid (at each electrode). Due to the large specific surface area of the metal-organic frame structure (J. Am. Chem. Soc., 2010, DOI: 10.1021 / ja1074322), a significant amount of charged ions and, accordingly, the electric charge, accumulate.

The materials used in the linear storage module retain their parameters in the operating temperature range from -70 to + 70 ° C and allow the module to be operated in harsh climatic conditions. The use of these materials will also eliminate the shortcomings of modern batteries in the field of ecology and explosion safety.

The technical result of the invention is the achievement of significant quantities of stored energy and the ability to return it compared to batteries and supercapacitors. At the same time, along with a significant increase in specific energy consumption, the overall dimensions of the linear drive module are reduced. This is achieved through the fact that in the linear module of energy storage and storage, to obtain innovative electrical characteristics, a material previously used for gas transportation and storage is used - a metal-organic frame structure with an equivalent surface area of one gram of this material equal to about 16,000.00 m ² that, for example, for a linear storage module with a length of 60 meters and a mass of used metal-organic frame structure equal to 3 kg, will allow for a module operating voltage of 12V n save the charge up to 5760000000000 pendant (with the estimated capacity of the linear storage module equal to 1600000000 Ah). In this case, the electric capacitance (C) of this linear storage module will be: C = S / d = 480000000000 F, and the calculated value of self-discharge will be within 2.08 · 10 ^-9 A · Ф ^-1 · V ^-1 . The electrodes of the linear energy storage module are designed for continuous operation with currents of about 100,000 A. The weight of the linear storage module with a length of 60 meters and a diameter of 0.015 meters is about 16 kg (8.5 kg - internal and external current-carrying conductors, 3.5 kg - metal-organic frame structure and ionic liquid, 4 kg - constructive (protective shell, module leads, etc.). The estimated number of charge / discharge cycles is about 15,000. The level of energy supplied (E) in joules: E = C * U ² _p / 2 = 115200 MJ

The novelty of the technical result consists in the creation of a maintenance-free linear module for energy storage and storage using materials having an increased specific area per gram of weight, and its manufacture in the form of a cable of fixed length. The use of materials with an increased specific area increases the energy intensity and the capabilities of the linear module in terms of energy output in comparison with existing analogues (supercapacitors and batteries). Moreover, its characteristics exceed known analogues by several orders of magnitude. It can be used in power supply systems for electric vehicles, the creation of transportable large-capacity electric energy storage facilities (energy containers) and other equipment requiring significant energy resources.

In FIG. 1 is a cross-sectional view of a linear module of energy storage and storage for autonomous power supply of electrical devices and equipment, where:

1. Ionic liquid (electrolyte).

2. The porous separator.

3. Central conductor.

4. Plasticized MOF structure.

5. Plasticized MOF structure.

6. External conductor.

7. Outer containment.

Claims (1)

A linear energy storage and storage module containing two electrodes forming a linear cylindrical structure, characterized by the design of the electrodes and the use of materials with a MOF structure based on copper.

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