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Optimization of Carbon‐ and Binder‐Free Au Nanoparticle‐Coated Ni Nanowire Electrodes for Lithium‐Oxygen Batteries
Author(s) -
Kim Sun Tai,
Choi NamSoon,
Park Soojin,
Cho Jaephil
Publication year - 2015
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.201401030
Subject(s) - materials science , electrode , lithium (medication) , nanowire , nanoparticle , substrate (aquarium) , chemical engineering , carbon fibers , oxygen , nanotechnology , composite material , composite number , chemistry , organic chemistry , medicine , oceanography , endocrinology , geology , engineering
A Au nanoparticle‐coated Ni nanowire substrate without binder or carbon is used as the electrode (denoted as the Au/Ni electrode) for Li‐oxygen (Li‐O 2 ) batteries. A minimal amount of Au nanoparticles with sizes of <30 nm on a Ni nanowire substrate are coated using a simple electrodeposition method to the extent that maximum capacity can be utilized. This optimized, one body, Au/Ni electrode shows high capacities of 921 mAh g −1 Au , 591 mAh g −1 Au , and 359 mAh g −1 Au , which are obtained at currents of 300 mAg −1 Au , 500 mAg −1 Au , and 1000 mAg −1 Au respectively. More importantly, the Au/Ni electrode exhibits excellent cycle stability over 200 cycles.