Enhanced Li-ion intercalation kinetics and lattice oxygen stability in single-crystalline Ni-rich Co-poor layered cathodes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F24%3A63578839" target="_blank" >RIV/70883521:28610/24:63578839 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2024/ta/d3ta07156a" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2024/ta/d3ta07156a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d3ta07156a" target="_blank" >10.1039/d3ta07156a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced Li-ion intercalation kinetics and lattice oxygen stability in single-crystalline Ni-rich Co-poor layered cathodes

Popis výsledku v původním jazyce

Single-crystalline nickel-rich cobalt-poor layered oxides are promising cathode materials for lithium-ion batteries due to their high safety and competitive cost. However, the severe cation disorder and lithium/oxygen (Li/O) loss during the high-temperature calcination process result in slow Li-ion diffusion and inferior O stability. Herein, a LiNi0.85Co0.05Mn0.10O2 (NCM85) single-crystalline cathode was prepared at relatively lower lithiation temperatures by barium/aluminum (Ba/Al) co-doping. The increase in the c-axis caused by Ba doping with a larger ion radius and the reduction in Li/Ni disorder can enhance the Li-ion diffusion kinetics, while the strong Ba-O and Al-O bonds considerably boost the lattice O stability to alleviate O escape during the charging process. The optimized cathode exhibits a high reversible capacity of 206.5 mA h g−1 at 0.1C and 115.6 mA h g−1 at 5C. Impressively, 87.5% of initial capacity is still maintained after 500 cycles at 1C in a pouch-type full cell. This finding provides a viable and flexible method to resolve the kinetics and stability issues of other layered oxide cathodes.

Název v anglickém jazyce

Enhanced Li-ion intercalation kinetics and lattice oxygen stability in single-crystalline Ni-rich Co-poor layered cathodes

Popis výsledku anglicky

Single-crystalline nickel-rich cobalt-poor layered oxides are promising cathode materials for lithium-ion batteries due to their high safety and competitive cost. However, the severe cation disorder and lithium/oxygen (Li/O) loss during the high-temperature calcination process result in slow Li-ion diffusion and inferior O stability. Herein, a LiNi0.85Co0.05Mn0.10O2 (NCM85) single-crystalline cathode was prepared at relatively lower lithiation temperatures by barium/aluminum (Ba/Al) co-doping. The increase in the c-axis caused by Ba doping with a larger ion radius and the reduction in Li/Ni disorder can enhance the Li-ion diffusion kinetics, while the strong Ba-O and Al-O bonds considerably boost the lattice O stability to alleviate O escape during the charging process. The optimized cathode exhibits a high reversible capacity of 206.5 mA h g−1 at 0.1C and 115.6 mA h g−1 at 5C. Impressively, 87.5% of initial capacity is still maintained after 500 cycles at 1C in a pouch-type full cell. This finding provides a viable and flexible method to resolve the kinetics and stability issues of other layered oxide cathodes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

2050-7496

Svazek periodika

2024

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

3682-3688

Kód UT WoS článku

001142164300001

EID výsledku v databázi Scopus

2-s2.0-85182897717