@article{5d22800d0666493484a5e139ff6ed76e,
title = "Hysteresis-Suppressed Reversible Oxygen-Redox Cathodes for Sodium-Ion Batteries",
abstract = "Oxygen-redox-based cathode materials for sodium-ion batteries (SIBs) have attracted considerable attention in recent years owing to the possibility of delivering additional capacity in the high-voltage region. However, they still suffer from not only fast capacity fading but also poor rate capability. Herein, P2-Na0.75[Li0.15Ni0.15Mn0.7]O2 is introduced, an oxygen-redox-based layered oxide cathode material for SIBs. The effect of Ni doping on the electrochemical performance is investigated by comparison with Ni-free P2-Na0.67[Li0.22Mn0.78]O2. The Na0.75[Li0.15Ni0.15Mn0.7]O2 delivers a specific capacity of ≈160 mAh g−1 in the voltage region of 1.5–4.6 V at 0.1 C in Na cells. Combined experiments (galvanostatic cycling, neutron powder diffraction, X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, and nuclear magnetic resonance (7Li NMR)) and theoretical studies (density functional theory calculations) confirm that Ni substitution not only increases the operating voltage and decreases voltage hysteresis but also improves the cycling stability by reducing Li migration from transition metal to Na layers. This research demonstrates the effect of Li and Ni co-doping in P2-type layered materials and suggests a new strategy of using Mn-rich cathode materials via oxygen redox with optimization of doping elements for SIBs.",
keywords = "batteries, cathodes, layered, oxygen redox, sodium",
author = "Natalia Voronina and Shin, {Min Young} and Kim, {Hee Jae} and Najma Yaqoob and Olivier Guillon and Song, {Seok Hyun} and Hyungsub Kim and Lim, {Hee Dae} and Jung, {Hun Gi} and Younghak Kim and Lee, {Han Koo} and Lee, {Kug Seung} and Koji Yazawa and Kazuma Gotoh and Payam Kaghazchi and Myung, {Seung Taek}",
note = "Funding Information: N.V. and M.-Y.S. contributed equally to this work. The authors also greatly appreciate Prof. Shinichi Komaba (Tokyo University of Science, Japan) for fruitful discussion on this work. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science, and Technology of Korea (NRF-2017M3A7B4049173, NRF-2020R1A2B5B01095954, NRF-2020R1A6A1A03043435). P.K. gratefully acknowledges support from the “Bundesministerium f{\"u}r Bildung und Forschung” (BMBF) and the computing time granted through JARA-HPC on the supercomputer JURECA at Forschungszentrum J{\"u}lich. Funding Information: N.V. and M.‐Y.S. contributed equally to this work. The authors also greatly appreciate Prof. Shinichi Komaba (Tokyo University of Science, Japan) for fruitful discussion on this work. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science, and Technology of Korea (NRF‐2017M3A7B4049173, NRF‐2020R1A2B5B01095954, NRF‐2020R1A6A1A03043435). P.K. gratefully acknowledges support from the “Bundesministerium f{\"u}r Bildung und Forschung” (BMBF) and the computing time granted through JARA‐HPC on the supercomputer JURECA at Forschungszentrum J{\"u}lich. Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",
year = "2022",
month = jun,
day = "2",
doi = "10.1002/aenm.202103939",
language = "English",
volume = "12",
journal = "Advanced Energy Materials",
issn = "1614-6832",
publisher = "Wiley-VCH Verlag",
number = "21",
}
