Energy storage devices

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Industrial and consumer market of lithium chemical power sources (Li-CPS) is considered to be the most progressive developing among independent power sources. Li-CPS are widely used in military equipment, medicine, in measuring and computing devices, in consumer and industrial electronic devices.Despite the great volume of Li-CPS production, the problem of improving their efficiency and reducing the cost are still very relevant, as evidenced by the large number of publications and conferences related to this subject. In particular, it relates to the problems of improving the properties of the electrode materials, among which an emphasis should be put on increasing of the capacity and the number of charge-discharge cycles, and reducing the degradation of materials during prolonged cycling.

For several years the research group of AkKoLab LLC have been working on creating of high-energy power storage device – a supercapacitor based exclusively on carbon materials. Thus, porous carbon materials with the specific surface area up to 3780 m2 g-1 were obtained, manufacturing technology of carbon electrodes for supercapacitors was developed. Research and development carried out in the laboratory resulted in the unprecedented creation of All-Carbon Supercapacitor battery with the capacity of 3700 F.

 

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Capacity, F 3700
Maximumoperatingvoltage, V 2.3
Minimumoperatingvoltage, V 0
Energy in operating voltage range, kJ 9.7
Active mass, kg 0.260
Overall dimensions of active part, mm 52×100×100
Active volume, cm3 520

 

AkKoLab LLC is constantly working on developing new materials and improving the properties of already existing ones applicable for creating supercapacitors. Also, a new direction of creating a highly capacitive Li-ion battery was started. To date, our company has already manufactured prototypes of lithium-ion batteries with new types of highly capacitive cathode and anode materials. Moreover, we have developed a new electrolyte composition based on non-polluting organic compounds capable to withstand higher voltage compared to modern analogues.

 

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The prototype discharge curve of lithium-ion battery (R = 2,3kOhms, continuous)

Development of electrode materials and selection of electrolyte for supercapacitor and accumulators are important steps to create a powerful energy storage device. At that, the produced materials should have sufficient mechanical resistivity, high electric conductivity, sufficient stability, wettability and reasonable accessibility of the electrode surface to the ions of the electrolyte. In its turn, the electrolyte should have high conductivity combined with electrochemical stability in a wide range of temperatures and voltages.

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