Abstract
The
Sb‐hybridization
strategy
enables
the
precise
construction
of
p‐n
heterojunctions,
which
significantly
enhances
electromagnetic
wave
(EMW)
absorption
performance
by
optimizing
interface
polarization.
In
this
study,
an
innovative
in
situ
ion‐exchange
method
is
developed
to
implement
Sb
hybridization,
establishing
built‐in
electric
fields
within
CoS
2
/Sb
S
3
@CNFs
that
amplify
polarization
relaxation
loss.
This
structural
design
synergistically
combines
a
carbon‐skeleton‐induced
conductive
network
with
magnetic
loss
mechanisms
,
ultimately
yielding
exceptional
EMW
absorber.
optimized
composite
demonstrates
remarkable
attenuation
capabilities,
achieving
minimum
reflection
(RL
min
)
−57.53
dB
at
mm
and
effective
bandwidth
(EAB
max
7.28
GHz
(covering
X‐band
(8–12
GHz)
Ku‐band
(12–18
GHz)).
study
not
only
provides
novel
for
designing
advanced
absorbers
but
also
highlights
significance
heterojunction
engineering
functional
composites.
