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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Enhanced Li-ion intercalation kinetics and lattice oxygen stability in single-crystalline Ni-rich Co-poor layered cathodes
Original language description
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.
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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