ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(14), P. 16599 - 16608
Published: July 9, 2024
Developing
a
host
that
enhances
active
selenium
utilization
and
mitigates
the
polyselenide
shuttle
effect
is
crucial
for
both
sodium–selenium
(Na–Se)
potassium–selenium
(K–Se)
storage
systems.
Herein,
biomass-derived
three-dimensional
nitrogen-doped
cross-linked
porous
carbon
(3D-N-CPC)
designed
as
Se
host.
The
high
specific
surface
area
of
3D-N-CPC
ensures
efficient
Se/Na2Se/K2Se.
abundant
micromesoporous
structures
can
not
only
serve
physical
barriers
storing
small
molecules
confining
polyselenides
but
also
effectively
alleviate
volume
expansion
during
cycling.
In
addition,
in
situ
N-doped
sites
improve
electrical
conductivity
accelerate
conversion
kinetics.
By
combining
these
advantages,
3D-N-CPC/Se
electrode
exhibits
reversible
capacity
393
mA
h
g–1
after
2000
cycles
at
2C
superior
rate
performance
328
10C
Na–Se
batteries.
Moreover,
demonstrates
batteries
across
wide
temperature
range
(−10
to
50
°C).
K–Se
batteries,
maintains
476
200
0.2C.
This
work
could
pave
way
development
conductive
matrix
with
structure
advanced
selenium-based
battery
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(31), P. 40894 - 40902
Published: July 26, 2024
Antimony
(Sb)
is
an
attractive
anode
material
for
potassium-ion
batteries
(PIBs),
but
it
suffers
from
aggregation
during
the
charging–discharging
process,
thus
causing
embedded
active
sites
and
collapsed
structure.
The
analogous
chelation
refers
to
reaction
in
which
central
nanoparticle
linked
matrix
through
multiple
coordination
bonds
form
a
stable
composite.
This
strategy
can
inhibit
maintain
nanosized
structure
of
Sb,
activating
utilization
Sb
structural
stability.
Given
special
position
nitrogen
(N)
periodic
table
elements
strong
bond
energy
Sb–N,
N
element
serve
as
intermediate
connect
nanoparticles
intrinsic
N-doped
carbon
network
via
Sb–N–C/Sb–N═C
covalent
using
chelation.
Herein,
hybrid
Sb@CTF-NC
fabricated
atoms
exposed
on
surface
are
used
chelate
with
high-performance
PIBs.
mechanism
underwent
ex
situ
characterizations.
calculation
density
functional
theory
reveals
that
increase
adsorption
reduction
K+
diffusion
barrier
accelerate
electrochemical
kinetics.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(31), P. 40873 - 40880
Published: July 30, 2024
Lithium-rich
antiperovskites
promise
to
be
a
compelling
class
of
high-capacity
cathode
materials
due
the
existence
both
cationic
and
anionic
redox
activity.
Little
is
however
known
about
effect
separating
electrochemical
process
from
associated
implications
on
performance.
In
this
context,
we
report
properties
illustrative
example
three
different
(Li2Fe)SO
with
focus
effects.
With
high-voltage
process,
an
astonishing
capacity
around
400
mAh
g–1
can
initially
reached.
Our
results
identify
as
cause
poor
cycling
stability
demonstrate
that
fading
reported
in
previous
literature
avoided
by
restricting
only
processes.
Following
path,
our
(Li2Fe)SO-BM500
shows
strongly
improved
performance
indicated
constant
over
100
cycles
at
175
1
C.
approach
also
allows
us
investigate
bare
antiperovskite
phase
excluding
extrinsic
activity
initial
or
cycling-induced
impurity
phases.
underscore
synthesis
conditions
are
critical
determinant
lithium-rich
antiperovskites,
especially
regard
amount
secondary
phases,
while
particle
size
has
not
been
found
crucial
parameter.
Overall,
understanding
effects
provides
route
further
improve
their
energy
storage.
ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(14), P. 16599 - 16608
Published: July 9, 2024
Developing
a
host
that
enhances
active
selenium
utilization
and
mitigates
the
polyselenide
shuttle
effect
is
crucial
for
both
sodium–selenium
(Na–Se)
potassium–selenium
(K–Se)
storage
systems.
Herein,
biomass-derived
three-dimensional
nitrogen-doped
cross-linked
porous
carbon
(3D-N-CPC)
designed
as
Se
host.
The
high
specific
surface
area
of
3D-N-CPC
ensures
efficient
Se/Na2Se/K2Se.
abundant
micromesoporous
structures
can
not
only
serve
physical
barriers
storing
small
molecules
confining
polyselenides
but
also
effectively
alleviate
volume
expansion
during
cycling.
In
addition,
in
situ
N-doped
sites
improve
electrical
conductivity
accelerate
conversion
kinetics.
By
combining
these
advantages,
3D-N-CPC/Se
electrode
exhibits
reversible
capacity
393
mA
h
g–1
after
2000
cycles
at
2C
superior
rate
performance
328
10C
Na–Se
batteries.
Moreover,
demonstrates
batteries
across
wide
temperature
range
(−10
to
50
°C).
K–Se
batteries,
maintains
476
200
0.2C.
This
work
could
pave
way
development
conductive
matrix
with
structure
advanced
selenium-based
battery
