2026-10-12T10:24:59Zhttps://www.radar-service.eu/oai/OAIHandler10.35097/ejazcks3bd5v3fq22026-10-09T10:58:39Zradar4kit
https://dx.doi.org/10.35097/ejazcks3bd5v3fq2
Fu, Qiang
Schwarz, Björn
Sarapulova, Angelina
Luo, Xianlin
Hansen, Julian
Meng, Zhen
Baran, Volodymyr
Missyul, Alexander
Welter, Edmund
Hua, Weibo
Knapp, Michael
Ehrenberg, Helmut
Dsoke, Sonia
Na+ Pre-Intercalated Bilayered V2O5 Cathode Materials for Na-Ion Batteries
Karlsruhe Institute of Technology
2024
Engineering
dataset
Dataset
info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-sa/4.0/legalcode
Na+ pre-intercalated bilayered vanadium oxide (NVOnH) with a large interlayer spacing of ∼11.1 Å is synthesized via hydrothermal method. As proven by mass spectrometry and magnetization measurements, NVOnH is “oxygen-rich”. NVOnH undergoes a notable structure evolution and thermal instability during heating due to crystal water and O2 release and decomposition. NVOnH and dehydrated NVOnH (NVO) deliver a capacity of over 250 mAh g−1 and 220 mAh g−1, respectively, despite their fast capacity decay in the first 20 cycles and low capacity retention after 100 cycles. Moreover, the reaction mechanism and reversibility of NVOnH and NVO during Na+ ions (de)insertion are investigated via in operando techniques. NVOnH experiences a 2-phase and solid solution reaction during discharge and charge processes while NVO undergoes a different phase evolution (NVO starting with charging: 2-phase reaction for the first charging and only solid solution for the following cycle; NVO starting with discharging: only solid solution reaction). In operando X‑ray absorption spectroscopy demonstrates the variation of the oxidation state and the local structural environment of V ion during Na+ (de)insertion.
The data include electrochemistry data, XPS, TGA, XRD, magnetic data, in situ HT XRD, in situ XRD and XAS data, which were plotted using Origin software.
Na-ion batteries
vanadium oxide cathode
in situ high-temperature synchrotron diffraction
in operando synchrotron diffraction
in operando X‑ray absorption spectroscopy.
https://publikationen.bibliothek.kit.edu/1000173140
application/x-tar