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Article

Studies of Nickel-Rich LiNi0.85Co0.10Mn0.05O2 Cathode Materials Doped with Molybdenum Ions for Lithium-Ion Batteries

1
Department of Chemistry, Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 52900, Israel
2
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
3
Solid State Institute, Technion—Israel Institute of Technology, Haifa 32000, Israel
4
Department of Materials Science and Engineering, Technion—Israel Institute of Technology, Haifa 32000, Israel
5
Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
*
Authors to whom correspondence should be addressed.
Academic Editor: Enrico Negro
Materials 2021, 14(8), 2070; https://doi.org/10.3390/ma14082070
Received: 18 March 2021 / Revised: 7 April 2021 / Accepted: 16 April 2021 / Published: 20 April 2021
(This article belongs to the Special Issue Nanostructured Materials for Electrochemical Energy Storage)
In this work, we continued our systematic investigations on synthesis, structural studies, and electrochemical behavior of Ni-rich materials Li[NixCoyMnz]O2 (x + y + z = 1; x ≥ 0.8) for advanced lithium-ion batteries (LIBs). We focused, herein, on LiNi0.85Co0.10Mn0.05O2 (NCM85) and demonstrated that doping this material with high-charge cation Mo6+ (1 at. %, by a minor nickel substitution) results in substantially stable cycling performance, increased rate capability, lowering of the voltage hysteresis, and impedance in Li-cells with EC-EMC/LiPF6 solutions. Incorporation of Mo-dopant into the NCM85 structure was carried out by in-situ approach, upon the synthesis using ammonium molybdate as the precursor. From X-ray diffraction studies and based on our previous investigation of Mo-doped NCM523 and Ni-rich NCM811 materials, it was revealed that Mo6+ preferably substitutes Ni residing either in 3a or 3b sites. We correlated the improved behavior of the doped NCM85 electrode materials in Li-cells with a partial Mo segregation at the surface and at the grain boundaries, a tendency established previously in our lab for the other members of the Li[NixCoyMnz]O2 family. View Full-Text
Keywords: lithium-ion batteries; LiNi0.85Co0.10Mn0.05O2 cathode materials; Mo-doping; cycling behavior; dopant segregation at the surface lithium-ion batteries; LiNi0.85Co0.10Mn0.05O2 cathode materials; Mo-doping; cycling behavior; dopant segregation at the surface
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MDPI and ACS Style

Susai, F.A.; Kovacheva, D.; Kravchuk, T.; Kauffmann, Y.; Maiti, S.; Chakraborty, A.; Kunnikuruvan, S.; Talianker, M.; Sclar, H.; Fleger, Y.; Markovsky, B.; Aurbach, D. Studies of Nickel-Rich LiNi0.85Co0.10Mn0.05O2 Cathode Materials Doped with Molybdenum Ions for Lithium-Ion Batteries. Materials 2021, 14, 2070. https://doi.org/10.3390/ma14082070

AMA Style

Susai FA, Kovacheva D, Kravchuk T, Kauffmann Y, Maiti S, Chakraborty A, Kunnikuruvan S, Talianker M, Sclar H, Fleger Y, Markovsky B, Aurbach D. Studies of Nickel-Rich LiNi0.85Co0.10Mn0.05O2 Cathode Materials Doped with Molybdenum Ions for Lithium-Ion Batteries. Materials. 2021; 14(8):2070. https://doi.org/10.3390/ma14082070

Chicago/Turabian Style

Susai, Francis A., Daniela Kovacheva, Tatyana Kravchuk, Yaron Kauffmann, Sandipan Maiti, Arup Chakraborty, Sooraj Kunnikuruvan, Michael Talianker, Hadar Sclar, Yafit Fleger, Boris Markovsky, and Doron Aurbach. 2021. "Studies of Nickel-Rich LiNi0.85Co0.10Mn0.05O2 Cathode Materials Doped with Molybdenum Ions for Lithium-Ion Batteries" Materials 14, no. 8: 2070. https://doi.org/10.3390/ma14082070

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