Architecting robust full concentration gradient NCM712 cathodes for high-energy Li-Ion batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F24%3A63579422" target="_blank" >RIV/70883521:28610/24:63579422 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acssuschemeng.3c08431" target="_blank" >https://pubs.acs.org/doi/10.1021/acssuschemeng.3c08431</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acssuschemeng.3c08431" target="_blank" >10.1021/acssuschemeng.3c08431</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Architecting robust full concentration gradient NCM712 cathodes for high-energy Li-Ion batteries

Popis výsledku v původním jazyce

Full concentration gradient ternary oxide cathodes, with a Ni-rich core and a Mn-rich surface, have been identified to effectively enhance their interfacial and structural stability for long-life Li-ion batteries. Nevertheless, a big challenge is to address the degradient effect during high-temperature lithiation. Herein, we demonstrate the synthesis of gradient LiNi0.70Co0.10Mn0.20O2 cathodes by F-doping and intergranular LixWyOz coating. The coating layer served as a physical barrier to mitigate the interdiffusion of transition metal ions during grain boundary merging. Meanwhile, the doped F ions, occupying the O sites, can further restrict ion transfer to inner primary particles by the formation of extremely strong M-F bonds. Accordingly, the resultant gradient cathodes deliver a high reversible capacity of 211.2 mAh g-1 at 0.1C in coin-type half-cells. A superior cycling stability is achieved with a high capacity retention of 93.0% at 1C after 500 cycles within 2.7-4.5 V in pouch-type full cells. This work provides a reliable technical route to obtain high-energy Li-ion batteries by the design of high-voltage concentration gradient Ni-rich cathodes.

Název v anglickém jazyce

Architecting robust full concentration gradient NCM712 cathodes for high-energy Li-Ion batteries

Popis výsledku anglicky

Full concentration gradient ternary oxide cathodes, with a Ni-rich core and a Mn-rich surface, have been identified to effectively enhance their interfacial and structural stability for long-life Li-ion batteries. Nevertheless, a big challenge is to address the degradient effect during high-temperature lithiation. Herein, we demonstrate the synthesis of gradient LiNi0.70Co0.10Mn0.20O2 cathodes by F-doping and intergranular LixWyOz coating. The coating layer served as a physical barrier to mitigate the interdiffusion of transition metal ions during grain boundary merging. Meanwhile, the doped F ions, occupying the O sites, can further restrict ion transfer to inner primary particles by the formation of extremely strong M-F bonds. Accordingly, the resultant gradient cathodes deliver a high reversible capacity of 211.2 mAh g-1 at 0.1C in coin-type half-cells. A superior cycling stability is achieved with a high capacity retention of 93.0% at 1C after 500 cycles within 2.7-4.5 V in pouch-type full cells. This work provides a reliable technical route to obtain high-energy Li-ion batteries by the design of high-voltage concentration gradient Ni-rich 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

ACS Sustainable Chemistry &amp; Engineering

ISSN

2168-0485

e-ISSN

—

Svazek periodika

12

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

4993-5000

Kód UT WoS článku

001184716100001

EID výsledku v databázi Scopus

2-s2.0-85187568463