The
rational
design
of
a
porous
core–shell
heterostructure
with
open
spaces
is
an
effective
strategy
to
mitigate
the
aggregation
and
volume
expansion
active
nanoelectrodes
during
charging/discharging
processes.
Herein,
leaf-like
CoNiSe2/NC@Ni3(PO4)2
hierarchical
pores
in
situ
grown
on
activated
carbon
cloth
(CC)
as
free-standing
electrode
for
flexible
supercapacitors.
collectively
formed
by
both
interspaces
among
adjacent
structures
channels
vertically
crossed
Ni3(PO4)2
nanosheets
not
only
significantly
enhance
electrolyte
contact
areas
promote
rapid
penetration
ion
diffusion
but
also
effectively
buffer
agglomeration
nanoelectrode.
Such
unique
spatial
arrangement
structure
endow
CoNiSe2/NC@Ni3(PO4)2/CC
high
specific
capacitance
2505
F
g–1
(1
A
g–1)
extended
cycle
life
91.1%
capacity
retention
after
10,000
cycles,
surpassing
most
reported
electrodes
similar
compositions.
combined
experimental
band
analysis
signifies
that
integrated
CoNiSe2/Ni3(PO4)2
interfaces
featuring
optimized
electronic
accelerate
charge
transport
improve
redox-reaction
kinetics,
resulting
significant
enhancement
electrochemical
performance
compared
two
individual
components.
