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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Architecting robust full concentration gradient NCM712 cathodes for high-energy Li-Ion batteries
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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