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Studies of Nickel-Rich $LiNi_{0.85}Co_{0.10}Mn_{0.05}O_{2}$ Cathode Materials Doped with Molybdenum Ions for Lithium-Ion Batteries
| Content Provider | MDPI |
|---|---|
| Author | Susai, Francis Kovacheva, Daniela Kravchuk, Tatyana Kauffmann, Yaron Maiti, Sandipan Chakraborty, Arup Kunnikuruvan, Sooraj Talianker, Michael Sclar, Hadar Fleger, Yafit Markovsky, Boris Aurbach, Doron |
| Copyright Year | 2021 |
| Description | 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. |
| Starting Page | 2070 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma14082070 |
| Journal | Materials |
| Issue Number | 8 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-04-20 |
| Access Restriction | Open |
| Subject Keyword | Materials Electrochemistry Lithium-ion Batteries Lini0.85co0.10mn0.05o2 Cathode Materials Mo-doping Cycling Behavior Dopant Segregation At the Surface |
| Content Type | Text |
| Resource Type | Article |
