Revisiting Phase Transformation Mechanisms in LiNi0.5Mn1.5O4 High Voltage Cathodes with Operando Microdiffraction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456748" target="_blank" >RIV/00216208:11320/22:10456748 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=krcxt7xrvt" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=krcxt7xrvt</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsmaterialslett.2c00787" target="_blank" >10.1021/acsmaterialslett.2c00787</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Revisiting Phase Transformation Mechanisms in LiNi0.5Mn1.5O4 High Voltage Cathodes with Operando Microdiffraction

Popis výsledku v původním jazyce

Understanding the phase transition mechanisms of active materials inside Li-ion batteries is critical for rechargeability and optimizing the power/energy density of devices. In this work, high-energy microfocused X-ray diffraction is used to measure in operando the state-of-charge heterogeneities inside a high-voltage spinel (LiMn1.5Ni0.5O4, LMNO) cathode. The structure of an ac t i v e material which resists complete delithiation is studied to move toward unlocking the full storage capacity of ion-conductive spinels. High-precision diffraction also reveals nonlinear coupling between strain and lithiation state inside the cathode at high voltages, which suggests the phase diagram of this material is more complex than previously assumed X-ray diffraction depth-profiling shows that large lithiation heterogeneities through the cross-section of the electrode are formed even at low currents and that decoupling these gradients are necessary to study the phase transitions in detail .

Název v anglickém jazyce

Revisiting Phase Transformation Mechanisms in LiNi0.5Mn1.5O4 High Voltage Cathodes with Operando Microdiffraction

Popis výsledku anglicky

Understanding the phase transition mechanisms of active materials inside Li-ion batteries is critical for rechargeability and optimizing the power/energy density of devices. In this work, high-energy microfocused X-ray diffraction is used to measure in operando the state-of-charge heterogeneities inside a high-voltage spinel (LiMn1.5Ni0.5O4, LMNO) cathode. The structure of an ac t i v e material which resists complete delithiation is studied to move toward unlocking the full storage capacity of ion-conductive spinels. High-precision diffraction also reveals nonlinear coupling between strain and lithiation state inside the cathode at high voltages, which suggests the phase diagram of this material is more complex than previously assumed X-ray diffraction depth-profiling shows that large lithiation heterogeneities through the cross-section of the electrode are formed even at low currents and that decoupling these gradients are necessary to study the phase transitions in detail .

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ACS Materials Letters [online]

ISSN

2639-4979

e-ISSN

2639-4979

Svazek periodika

4

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

2528-2536

Kód UT WoS článku

000885385000001

EID výsledku v databázi Scopus

2-s2.0-85142129387