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Dual‐Function Air Cathode for Metal–Air Batteries with Pulse‐Power Capability
Author(s) -
Long Jeffrey W.,
Chervin Christopher N.,
Kucko Nathan W.,
Nelson Eric S.,
Rolison Debra R.
Publication year - 2013
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201200921
Subject(s) - pseudocapacitance , materials science , cathode , oxide , power (physics) , electrode , computer science , electrical engineering , nanotechnology , capacitance , supercapacitor , metallurgy , engineering , chemistry , physics , quantum mechanics
Air‐breathing electrodes comprising carbon nanofoam papers coated with nanoscale manganese oxide (MnO x ) exhibit two distinct functionalities – electrocatalysed oxygen reduction plus faradaic pseudocapacitance. Pseudocapacitance provides seconds‐long discharge pulses at current densities that exceed oxygen reduction alone, even providing pulse power for one anaerobic cycle. The MnO x spontaneously recharges between pulses via reaction with oxygen while operating as an air cathode.