Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: April 16, 2025
Closed
pores
are
widely
accepted
as
the
critical
structure
for
hard
carbon
negative
electrodes
in
sodium-ion
batteries.
However,
lack
of
a
clear
definition
and
design
principle
closed
leads
to
undesirable
electrochemical
performance
electrodes.
Herein,
we
reveal
how
evolution
pore
mouth
sizes
determines
solvation
thereby
redefine
pores.
The
precise
uniform
control
is
achieved
by
using
molecular
sieves
model
material.
We
show
when
inaccessible
N2
but
accessible
CO2
probes,
only
portion
solvent
shells
removed
before
entering
contact
ion
pairs
dominate
inside
When
namely
smaller
than
0.35
nm,
mostly
sieved
dominated
anion
aggregates
produce
thin
inorganic
NaF-rich
solid
electrolyte
interphase
accordingly
redefined,
initial
coulombic
efficiency,
cycling
low-temperature
largely
improved.
Furthermore,
that
intrinsic
defects
redefined
effectively
shielded
from
interfacial
passivation
contribute
increased
low-potential
plateau
capacity.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 5, 2024
Abstract
Hard
carbon
(HC)
has
been
widely
regarded
as
the
most
promising
anode
material
for
sodium‐ion
batteries
(SIBs)
due
to
its
decent
capacity
and
low
cost.
However,
poor
initial
Coulombic
efficiency
(ICE)
of
HC
seriously
hinders
practical
application
in
SIBs.
Herein,
pyridinic
N‐doped
hard
polyhedra
with
easily
accessible
carbonyl
groups
situ
coupled
nanotubes
are
rationally
synthesized
via
a
facile
pretreated
zeolitic
imidazolate
framework
(ZIFs)‐carbonization
strategy.
The
comprehensive
ex/in
techniques
combined
theoretical
calculations
reveal
that
synergy
pyridinic‐N
promoted
by
pretreatment
carbonization
process
would
not
only
optimize
Na
+
adsorption
energy
but
also
accelerate
desorption
,
significantly
suppressing
irreversible
loss.
As
result,
as‐synthesized
an
can
deliver
unprecedented
high
ICE
98%
large
reversible
389.4
mAh
g
−1
at
0.03
A
.
This
work
may
provide
effective
strategy
structural
design
ICE.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(24)
Published: April 1, 2024
Abstract
Hard
carbon
(HC)
is
subjected
to
low
initial
Coulombic
efficiency
(ICE)
and
unsteady
solid
electrolyte
interphase
(SEI),
which
limits
the
energy
density
cycling
performance.
Meanwhile,
studies
related
emerging
chemical
presodiation
have
specifically
focused
on
proper
redox
potential
overlooked
its
safety
hazard.
To
address
these
drawbacks
of
HC
presodiation,
a
series
high‐safety
solutions
based
tetraethylene
glycol
dimethyl
ether
(TEGDME)
are
proposed
for
uniform
fast
Bi
anodes.
Among
them,
Na‐4‐methylbiphenyl
in
TEGDME
solution
exhibits
lowest
(0.146
V
vs
Na
+
/Na),
achieves
inhibition
irreversible
sodium
uptake.
Meantime,
potential‐driven
decomposition
fluoroethylene
carbonate
endows
presodiated
(pNa‐HC)
fast‐ion
conducting
robust
F‐rich
SEI.
Accordingly,
pNa‐HC
delivers
an
ideal
ICE
99.1%
compared
(65.28%).
significantly
enhanced
rate
performance
life
(193.39
mAh
g
−1
after
2300
cycles
at
1000
mA
)
benefiting
from
reduced
kinetic
barriers.
When
pairs
with
3
2
(PO
4
cathode,
full
cell
demonstrates
desirable
91.25%.
This
work
provides
novel
universal
solvent
design
strategy
realize
pre‐metallation.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Abstract
Bacteria‐derived
carbon
anode
materials
have
shown
appealing
potential
for
advanced
energy
storage
applications
due
to
their
low
cost
and
good
sustainability.
However,
the
few
intrinsic
defects,
sluggish
transmission
dynamics,
capacity
become
main
bottleneck
further
development.
Herein,
study
designs
a
highly
B,
N
co‐doped
mesoporous
(BNMC)/staphylococcus
aureus‐derived
(SAC)
composite
via
facile
assembly
route,
followed
by
boron‐doping.
Enabled
heteroatom
doping
pore
construction,
resulting
BNMC/SAC
lithium‐ion
batteries
demonstrates
high
reversible
of
621.77
mAh
g
−1
at
200
mA
even
after
500
cycles,
an
excellent
rate
performance
405.14
2
A
.
Importantly,
in
situ/ex
situ
characterizations
theoretical
simulation
results
unveil
that
co‐doping
along
with
small
amount
P
can
significantly
increase
defects
BNMC/SAC,
thus
providing
more
active
sites
storage.
Furthermore,
these
structural
features
are
conducive
improving
interfacial
stability
whole
electrode,
achieving
thin
uniform
SEI
film.
The
multi‐component
strategy
engineering
presents
scalable
approach
enhancing
transfer
dynamics
carbon‐based
electrode
low‐cost
Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 6, 2024
Biomass-based
hard
carbon
has
the
advantages
of
a
balanced
cost
and
electrochemical
performance,
making
it
most
promising
anode
material
for
sodium-ion
batteries.
However,
due
to
structural
limitations
biomass
(such
as
macropores
impurities),
still
faces
problems
low
specific
capacity
initial
Coulombic
efficiency
(ICE).
Herein,
an
integrated
strategy
liquefaction
oxidation
treatment
is
proposed
fabricate
with
ash
content
sp
