@article{048d73ef14964e9db84ceff3509743c4,
title = "Stabilization of a 4.5 V Cr4+/Cr3+ redox reaction in NASICON-type Na3Cr2(PO4)3 by Ti substitution",
abstract = "The development of high-voltage cathode materials composed of abundant metals for rechargeable batteries is a crucial task to realize higher energy density in large-scale electrical energy storage systems. Here we report a reversible Cr4+/Cr3+ redox reaction at 4.5 V vs. Na/Na+ in NASICON-type Na2CrTi(PO4)3 (NCTP). An unstable Cr4+/Cr3+ redox in Na3Cr2(PO4)3 is successfully stabilized by the substitution of Ti with Cr. The charge/discharge mechanism of NCTP was studied by powder X-ray diffraction and soft X-ray absorption spectroscopy.",
author = "Kosuke Kawai and Daisuke Asakura and Nishimura, {Shin ichi} and Atsuo Yamada",
note = "Funding Information: The present work was financially supported by MEXT ESICB project and JSPS KAKENHI Specially Promoted Research (No. 15H05701). The synchrotron XRD and XAS experiments were performed under KEK-PF User Programs of No. 2018G080 and 2018G124, respectively. K. K. acknowledges financial support from {\textquoteleft}{\textquoteleft}Materials Education Program for the Future Leaders Research, Industry, and Technology{\textquoteright}{\textquoteright} (MERIT) project. Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",
year = "2019",
doi = "10.1039/c9cc04860j",
language = "English",
volume = "55",
pages = "13717--13720",
journal = "Chemical Communications",
issn = "1359-7345",
publisher = "Royal Society of Chemistry",
number = "91",
}