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Polypyrrole‐Assisted Co 3 O 4 Anchored Carbon Fiber as a Binder‐Free Electrode for Seawater Batteries
Author(s) -
Kim Changmin,
Kim Seona,
Kwon Ohhun,
Kim Jeongwon,
Kim Guntae
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201801219
Subject(s) - polypyrrole , electrode , seawater , materials science , fiber , carbon fibers , chemical engineering , composite material , polymer , chemistry , composite number , oceanography , geology , polymerization , engineering
An efficient, durable and cost‐effective air electrode is essential to achieve a practicable metal‐air battery. The conventional preparation of electrode uses polymer binders to ensure good physical contacts between catalysts and the electrode scaffold. However, the use of polymer binders introduces inevitable loss of the electrochemically active surface area and restricts access of the reactants, owing to the electrically insulating properties and hydrophobic properties of polymer binders. In this work, a binder‐free air electrode is structured by using Co oxide anchored on carbon fiber tissues with the assistance of polypyrrole‐doped carbon (PPy/C) through a simple infiltration technique. The fabricated binder‐free electrode exhibits excellent bifunctional stability for seawater batteries, presenting a comparable performance to the binder‐included Pt/C+IrO 2 electrode.