In situ doping polyanions enables concentration-gradient Ni-rich cathodes for long-life lithium-ion batteries
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F23%3A63571819" target="_blank" >RIV/70883521:28610/23:63571819 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.energyfuels.3c03390" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.energyfuels.3c03390</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.energyfuels.3c03390" target="_blank" >10.1021/acs.energyfuels.3c03390</a>
Alternative languages
Result language
angličtina
Original language name
In situ doping polyanions enables concentration-gradient Ni-rich cathodes for long-life lithium-ion batteries
Original language description
The novel Ni-rich cathode materials with concentration-gradient structures have become a research hotspot by virtue of their advantages of high specific capacity and thermal stability. However, the unfavorable interdiffusion of transition metals (TMs) during lithiation leads to flattening of the gradient and weakens the surface passivation effect. Herein, we successfully constructed a concentration-gradient nickel-rich cathode with an average composition of LiNi0.83Co0.05Mn0.12O2 via a SiO44– polyanion doping strategy (GNCM-Si). SiO44– doping allows the preservation of the concentration-gradient structure at high lithiation temperatures by hindering TM (Ni, Mn) interdiffusion, ensuring high surface stability of nickel-rich cathodes at the end of charge. Besides, the strong Si–O bond effectively stabilizes the lattice oxygen framework, thereby reducing oxygen evolution and further enhancing thermal stability. Accordingly, the as-obtained concentration-gradient cathode demonstrates a high reversible specific capacity of 210.5 mA h g–1 and a high Coulombic efficiency of 89.7% at 0.1C. Impressively, it retains 92.7% of its initial capacity after 500 cycles in pouch-type full cells at 25 °C and 1C. This finding offers a viable idea for constructing concentration-gradient cathodes to meet the high safety requirements of lithium-ion batteries.
Czech name
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Czech description
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Classification
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)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Energy and Fuels
ISSN
0887-0624
e-ISSN
1520-5029
Volume of the periodical
37
Issue of the periodical within the volume
22
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
"17553−17560"
UT code for WoS article
001141288400001
EID of the result in the Scopus database
2-s2.0-85178187851