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Cobalt‐Encapsulated Nitrogen‐Doped Carbon Nanotube Arrays for Flexible Zinc–Air Batteries
Author(s) -
Liu Lina,
Wang Yue,
Yan Feng,
Zhu Chunling,
Geng Bo,
Chen Yujin,
Chou Shulei
Publication year - 2020
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201900571
Subject(s) - materials science , battery (electricity) , electrode , carbon nanotube , zinc , cobalt , cathode , electrochemistry , nanotechnology , carbon fibers , current collector , power density , chemical engineering , composite material , electrical engineering , chemistry , power (physics) , metallurgy , composite number , engineering , physics , quantum mechanics
With the current rapid growth of commercial applications for flexible and wearable optoelectronic devices, flexible power sources are very much in demand. Herein, a facile strategy to grow cobalt nanoparticles encapsulated in nitrogen‐doped carbon nanotube arrays on flexible carbon fiber cloth as self‐supported electrodes for high‐performance flexible zinc–air batteries is developed. Benefiting from high electrical conductivity and multiple active sites as well as free polymer binder, the self‐supported electrode exhibits excellent electrocatalytic activity. The maximum power density of a zinc–air battery using the self‐supported electrode as air cathode is higher than that of the zinc–air battery with Pt/C+IrO 2 as air electrode. Furthermore, the zinc–air battery can be stably operated under external stress without obvious loss of the electrochemical performance. This work opens up a new pathway for the rational design of flexible electrodes for high‐performance flexible power sources.