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How Metallic Impurities in Carbon Cathodes Affect the Electrochemistry of Aluminum Batteries
Author(s) -
Smajic Jasmin,
Simoes Filipa R. Fernandes,
Costa Pedro M. F. J.
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202001273
Subject(s) - electrochemistry , cathode , impurity , materials science , electrolyte , carbon fibers , carbon nanotube , aluminium , transition metal , aqueous solution , nanotechnology , chemical engineering , battery (electricity) , inorganic chemistry , metallurgy , electrode , chemistry , catalysis , composite material , organic chemistry , power (physics) , physics , quantum mechanics , composite number , engineering
As a promising electrochemical energy storage system, rechargeable aluminum batteries face critical challenges in their quest for commercial viability. While the design of suitable cathodes has attracted much attention, their chemical composition and purity has been less of a concern. This is especially true for carbon cathodes, where the presence of metallic impurities is often overlooked. Herein, we demonstrate the influence that transition metals exert on the electrochemistry of carbon nanotube cathodes for non‐aqueous aluminum batteries. In the presence of chloroaluminate electrolytes, these synthesis by‐products originate inflated capacities, increased self‐discharge and misleading electrochemical signatures, among others. Thus, our findings affirm the need for strict control of the composition and purity of materials (and components) used in non‐aqueous aluminum batteries.