ACS Catalysis,
Год журнала:
2024,
Номер
14(2), С. 1121 - 1145
Опубликована: Янв. 8, 2024
Dual
and
triple
atom
catalysts
(DACs
TACs)
are
an
emerging
field
of
heterogeneous
catalysis
research.
They
share
properties
with
single
(SACs),
such
as
maximizing
dispersion
metals
the
ability
to
circumvent
traditional
scaling
relations
that
limit
extended
surfaces.
DACs
TACs
additionally
provide
adjacent
sites
necessary
for
certain
reaction
mechanisms
add
tunability
electronic
structure
binding
energies.
are,
however,
inherently
difficult
selectively
synthesize
characterize.
Characterization
activity
evaluation
prone
misinterpretation,
adding
confusion
already
complex
field.
In
this
review,
we
investigate
current
progress
important
electrochemical
reactions
in
energy
conversion
storage.
We
further
discuss
future
synthesis
methods
focus
on
common
pitfalls
characterization
evaluation.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(37)
Опубликована: Июль 31, 2023
Li-rich
layered
oxides
(LRLOs)
with
greater
specific
capacity
density
are
constrained
by
voltage
attenuation
and
inferior
rate
performance
because
of
irreversible
oxygen
release,
metal
dissolving
poor
lithium-ion
transport
capacity.
Herein,
a
simple
surface
modification
is
designed
to
solve
the
degradation
structural
collapse
LRLOs.
Combining
experiments
functional
theory
(DFT)
calculations,
semi-metallic
LiMn2
O4
-like
structure
(LMO)
spin-polarized
conducting
electrons,
introduced
cathode
restrains
activated
surficial
lattice
ions
its
stable
vacancies.
Additionally,
Ni
doping
results
in
fast-ion
conductor
Li0.8
Nb0.96
Ni0.2
O3
(LNO)
lowered
lithium
diffusion
barrier,
which
tightly
conjugating
substrate
synergistically
reinforces
Li
path
through
cathode-electrolyte
interphase.
Moreover,
Mn
dissolution
successfully
relieved
due
decrease
concentration
coating
layers.
As
result,
modified
material
(LRLO@LMO@LNO)
exhibits
an
ultra-high
discharge
120.4
mAh
g-1
even
at
10
C
very
small
313
mV
after
600
cycles
(0.52
per
cycle)
1
C.
Undoubtedly,
this
method
discloses
effective
approach
promote
practical
utilization
high-energy-density.
