Controllable Tuning of Cobalt
Nickel-Layered Double
Hydroxide Arrays as Multifunctional Electrodes for Flexible Supercapattery
Device and Oxygen Evolution Reaction
Posted on 2019-09-23 - 18:45
The
rational design and fabrication of promising electrodes with
prominent energy storage property and conversion performance is crucial
for supercapacitors and electrocatalysis. Herein, potato chip-like
cobalt nickel-layered double hydroxide@polypyrrole–cotton pad
(CoNi-LDH@PCPs) composite was synthesized by in situ polymerization, which was coupled with facile solution reaction
and ion-exchange etching process. An interesting potato chip-like
structure can effectively expedite the kinetics of the electrode reactions,
while the three-dimensional PCPs texture affords efficient pathways
for charge transport, and the voids between adjacent fibers are thoroughly
accessible for electrolytes and bubble evolution. When evaluated as
a positive electrode for wearable supercapattery, the hierarchical
CoNi-LDH@PCPs electrode displayed high specific capacity and excellent
flexibility. As an oxygen evolution reaction catalyst, this PCP-based
electrode also reveals the lowest overpotential of 350 mV at 10 mA
cm–2 and a Tafel slope of ∼58 mV dec–1. In addition, density functional theory calculations
suggest that the synthesis strategy for controllable tuning of hollow
CoNi-LDH arrays reported here represents a critical step toward high-performance
electrodes for energy storage and electrochemical catalysis.
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Wang, Weixiao; Lu, Yang; Zhao, Menglong; Luo, Rongjie; Yang, Ya; Peng, Tao; et al. (2019). Controllable Tuning of Cobalt
Nickel-Layered Double
Hydroxide Arrays as Multifunctional Electrodes for Flexible Supercapattery
Device and Oxygen Evolution Reaction. ACS Publications. Collection. https://doi.org/10.1021/acsnano.9b06910
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AUTHORS (9)
WW
Weixiao Wang
YL
Yang Lu
MZ
Menglong Zhao
RL
Rongjie Luo
YY
Ya Yang
TP
Tao Peng
HY
Hailong Yan
XL
Xianming Liu
YL
Yongsong Luo
KEYWORDS
PCP-based electrodeCoNi-LDH arraysTafel slopeelectrochemical catalysiswearable supercapatterysynthesis strategyelectrode reactionstheory calculationsbubble evolutionOxygen Evolution ReactionPCPs textureMultifunctional ElectrodesControllable Tuningion-exchange etching processsolution reactionenergy storage propertyoxygen evolution reaction catalystenergy storage350 mVcharge transportpotato chip-like structureCobalt Nickel-Layered Double Hydroxide Arraysconversion performancepotato chip-like cobalt nickel-layeredFlexible Supercapattery Device