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Constructing “Li-rich Ni-rich” oxide cathodes for high-energy-density Li-ion batteries

Li, Biao (author)
Chimie du Solide-Energie, UMR 8260, College de France, 75231 Paris Cedex 05, France;Reseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France
Rousse, Gwenaëlle (author)
Chimie du Solide-Energie, UMR 8260, College de France, 75231 Paris Cedex 05, France;Reseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France;Sorbonne Universite, 4 Place Jussieu, 75005, Paris, France
Zhang, Leiting (author)
Battery Electrodes and Cells, Electrochemistry Laboratory, Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen-PSI, Switzerland
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Avdeev, Maxim (author)
School of Chemistry, The University of Sydney, Sydney, New South Wales, Australia;Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Kirrawee DC, New South Wales, Australia
Deschamps, Michaël (author)
Reseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France;CNRS, CEMHTI UPR3079, Universite d’Orleans, Orleans, France
Abakumov, Artem M. (author)
Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Nobel str. 3, 121205 Moscow, Russia
Tarascon, Jean-Marie (author)
Chimie du Solide-Energie, UMR 8260, College de France, 75231 Paris Cedex 05, France;Reseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France;Sorbonne Universite, 4 Place Jussieu, 75005, Paris, France
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 (creator_code:org_t)
2023
2023
English.
In: Energy & Environmental Science. - : Royal Society of Chemistry. - 1754-5692 .- 1754-5706. ; 16:3, s. 1210-1222
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
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  • The current exploration of high-energy-density cathode materials for Li-ion batteries is mainly concentrated on either so-called “Li-rich” or “Ni-rich” oxides. However, both are suffering from formidable practical challenges. Here, we combine these two concepts to obtain “Li-rich Ni-rich” oxides in pursuit of more practical high-energy-density cathodes. As a proof of concept, we synthesized an array of Li1+yNi(3−5y)/3Mo2y/3O2 oxides, whose structures were identified to be the coexistence of LiNiO2-rich and Li4MoO5-rich domains with the aid of XRD, TEM, and NMR techniques. Such an intergrowth structure of 5–20 nm size enables excellent mechanical and structural reversibility for the layered rock-salt LiNiO2-rich domain upon cycling thanks to the robust cubic rock-salt Li4MoO5-rich domain enabling an “epitaxial stabilization” effect. As a result, we achieved high capacities (>220 mA h g−1) with Ni contents as low as 80%; the Li1.09Ni0.85Mo0.06O2 member (y = 0.09) shows much improved cycling performances (91% capacity retention for 100 cycles at C/10) compared with pure LiNiO2. This work validates the feasibility of constructing Li-rich Ni-rich compounds in the form of intergrowing domains and hence unlocks vast possibilities for future cathode design.

Subject headings

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

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