Kompozit polipirol/srebro-hlorid kao katodni materijal za punjive magnezijumske baterije

Abstract

U radu je ispitivano elektrohemijsko ponašanje elektrode na bazi polipirola (PPy) kao katodnog materijala u magnezijumskim punjivim celijama. PPy je sintetisan galvanostatski na ugljenicnoj tkanini (CF). Potom je na CF/PPy nanet AgCl primenom modifikovane metode sukcesivne jonske adsorpcije i reakcije (SILAR) [1]. Primenom ciklicne voltametrije i galavnostatskog punjenja/pražnjenja pokazano je veoma dobro elektrohemijsko ponašanje kompozitnog materijala CF/PPy-AgCl. Za punjivu magnezijumsku celiju na bazi vodenog elektrolita: AZ63 | 3.5% NaCl | CF/PPy-AgCl, primenom specificnih struja u opsegu od 135 do 1350 A g-1 dobijene su vrednosti specificne energije u opsegu 42-25 Wh kg-1, specificne snage 100 – 1600 W kg-1, specificnog kapaciteta 35-25 Ah kg-1. Tako e, ispitivana je i ciklicna stabilnost.

The electrochemical behavior of an electrode based on polypyrrole (PPy) as a cathode material in rechargeable aqueous-based magnesium cells was investigated. PPy was synthesized galvanostatically on carbon felt (CF). AgCl was then applied to CF / PPy using the modified successive ionic adsorption and reaction method (SILAR) [1]. The application of cyclic voltammetry and galvanostatic charge/discharge showed very good electrochemical behavior of the composite material CF/PPy-AgCl. For rechargeable magnesium cell based on water electrolyte: AZ63 | 3.5% NaCl | CF/PPy-AgCl, using specific currents in the range from 135 to 1350 A g-1, the values of specific energy of 42- 25 Wh kg-1, specific power 100 - 1600 W kg-1, and specific capacity 35-25 Ah kg-1 were obtained. Cyclic stability was also examined.