Study of Peat Fillers for their Potential Use in Electric Energy Storage Devices

Oleg Misnikov,S Zhironkin,M Cehlár,S Spearing,J Janocko,D Szurgacz,N Demirel,S Vöth,L Sobik

doi:10.1051/e3sconf/202127801022

Abstract

The article discusses the pros and cons of modern devices for power accumulating and its storage (supercapacitors). The author analyses porous carbon materials traditionally used as fillers in such devices. The presented main physical and chemical properties of peat allow the author to propose a working hypothesis about the possibility of using peat sorbents in supercapacitors. This is possible due to the high specific surface area of peat and by the presence of particles with a double electric layer (micelles) in it. For the first time ever, it was experimentally established that the use of a bog peat sorbent instead of activated carbon as a porous material makes it possible to multiply the voltage during self-discharge of an experimental model of a supercapacitor. The size of the peat sorbent fractions does not significantly affect the self-discharge process. However, there is a slight improvement in the performance of the device when using the fractions under 1.25 mm. The use of peat raw materials with a high degree of decomposition significantly improves the characteristics of the experimental model at a charging voltage of 10 V.

Highlights

The promising use of organic biogenic materials in devices for the accumulation and storage of electrical energy, as well as chemical energy-containing compounds stems from the physical and chemical properties of their individual structural units and, of the whole system
A comparative analysis of the effect of the filler on the self-discharge of the experimental setup shows that the use of the bog peat sorbent as a porous material (R т = 5 %) radically increases the voltage throughout the entire measurement period
To explain the essence of the physicochemical mechanism of these processes, additional research is being carried out using more typical representatives of the peat raw material

Summary

Introduction

The promising use of organic biogenic materials in devices for the accumulation and storage of electrical energy, as well as chemical energy-containing compounds stems from the physical and chemical properties of their individual structural units and, of the whole system. There is a fairly large number of publications [3,4,5,6] on the application of porous dispersed materials with high specific surface area in devices for the accumulation and storage of electrical energy – supercapacitors These are electrical devices, capable of giving a huge amount of energy in a short period of time that are used in various fields of electronics and electrical engineering. The main advantages of supercapacitors over conventional capacitors are their ability to combine high power and significant charge capacity, extremely fast charge accumulation, ability to withstand an almost unlimited number of chargedischarge cycles without loss of operational properties, polarity reversal, and other important characteristics [3, 4]

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