Open AccessStructural Influence of the Anode Materials towards Efficient Zn Deposition/Dissolution in Aqueous Zn-Iodide Flow Batteries
Author(s) -
Monalisa Chakraborty,
Sebastián Murcia-López,
Joan Ramón Morante,
Teresa Andreu
Publication year - 2021
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/abf4ee
Subject(s) - anode , foil method , dissolution , materials science , graphite , galvanic anode , deposition (geology) , battery (electricity) , zinc , carbon fibers , flow battery , electrode , cathode , chemical engineering , electrolyte , metallurgy , cathodic protection , composite material , chemistry , paleontology , sediment , engineering , power (physics) , physics , quantum mechanics , composite number , biology
Zinc-iodide flow battery (ZIFB) is one of the best potential candidates for future grid-scale energy storage, due to its eye-catching features of benign, high energy density and non-corrosive nature. However major investigations have not done yet on the negative electrode of this battery where the Zn deposition/dissolution mechanism takes place, which may have an impact on the battery performance. Herein, we have reported a comparative study of different carbon-based anodes which are conventional graphite felt, carbon paper and graphite foil. Single-cell charge/discharge performances among these three different anodes depicts that the cell with planar, hydrophilic graphite foil anode is showing the best energy efficiency and the lowest cell resistance among the carbonaceous electrodes. Zinc dissolution process during discharge process seems to be the bottleneck for having a stable cell, which was corroborated by the use of a Zn foil anode that shows excellent efficiencies along the successive cycles.