Literatura científica selecionada sobre o tema "Disordered Rocksalt"
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Artigos de revistas sobre o assunto "Disordered Rocksalt"
Pi, Liquan, Erik Björklund, Gregory Rees, Robert House e Peter Bruce. "Understanding the Degradation Mechanisms in Lithium Manganese Oxyfluoride Cathodes". ECS Meeting Abstracts MA2023-01, n.º 2 (28 de agosto de 2023): 493. http://dx.doi.org/10.1149/ma2023-012493mtgabs.
Texto completo da fonteAhn, Juhyeon, e Guoying Chen. "Development of Cation-Disordered Rocksalt Cathodes". ECS Meeting Abstracts MA2021-02, n.º 3 (19 de outubro de 2021): 392. http://dx.doi.org/10.1149/ma2021-023392mtgabs.
Texto completo da fonteChen, Dongchang, Juhyeon Ahn, Ethan Self, Jagjit Nanda e Guoying Chen. "Understanding cation-disordered rocksalt oxyfluoride cathodes". Journal of Materials Chemistry A 9, n.º 12 (2021): 7826–37. http://dx.doi.org/10.1039/d0ta12179g.
Texto completo da fonteKitchaev, Daniil A., Zhengyan Lun, William D. Richards, Huiwen Ji, Raphaële J. Clément, Mahalingam Balasubramanian, Deok-Hwang Kwon et al. "Design principles for high transition metal capacity in disordered rocksalt Li-ion cathodes". Energy & Environmental Science 11, n.º 8 (2018): 2159–71. http://dx.doi.org/10.1039/c8ee00816g.
Texto completo da fonteHouse, Robert A., Liyu Jin, Urmimala Maitra, Kazuki Tsuruta, James W. Somerville, Dominic P. Förstermann, Felix Massel, Laurent Duda, Matthew R. Roberts e Peter G. Bruce. "Lithium manganese oxyfluoride as a new cathode material exhibiting oxygen redox". Energy & Environmental Science 11, n.º 4 (2018): 926–32. http://dx.doi.org/10.1039/c7ee03195e.
Texto completo da fonteChen, Ying, e Chun Huang. "Realising higher capacity and stability for disordered rocksalt oxyfluoride cathode materials for Li ion batteries". RSC Advances 13, n.º 42 (2023): 29343–53. http://dx.doi.org/10.1039/d3ra05684h.
Texto completo da fonteAhn, Juhyeon, e Guoying Chen. "(Invited) High-Energy Mn-Rich Disordered Rocksalt Cathodes". ECS Meeting Abstracts MA2022-02, n.º 1 (9 de outubro de 2022): 35. http://dx.doi.org/10.1149/ma2022-02135mtgabs.
Texto completo da fonteSato, Kei, Masanobu Nakayama, Alexey M. Glushenkov, Takahiro Mukai, Yu Hashimoto, Keisuke Yamanaka, Masashi Yoshimura, Toshiaki Ohta e Naoaki Yabuuchi. "Na-Excess Cation-Disordered Rocksalt Oxide: Na1.3Nb0.3Mn0.4O2". Chemistry of Materials 29, n.º 12 (14 de junho de 2017): 5043–47. http://dx.doi.org/10.1021/acs.chemmater.7b00172.
Texto completo da fonteSato, Takahito, Kei Sato, Wenwen Zhao, Yoshio Kajiya e Naoaki Yabuuchi. "Metastable and nanosize cation-disordered rocksalt-type oxides: revisit of stoichiometric LiMnO2 and NaMnO2". Journal of Materials Chemistry A 6, n.º 28 (2018): 13943–51. http://dx.doi.org/10.1039/c8ta03667e.
Texto completo da fonteClément, R. J., Z. Lun e G. Ceder. "Cation-disordered rocksalt transition metal oxides and oxyfluorides for high energy lithium-ion cathodes". Energy & Environmental Science 13, n.º 2 (2020): 345–73. http://dx.doi.org/10.1039/c9ee02803j.
Texto completo da fonteTeses / dissertações sobre o assunto "Disordered Rocksalt"
Schröder, Thorsten. "Synthesis, thermal behavior and thermoelectric properties of disordered tellurides with structures derived from the rocksalt type". Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-172701.
Texto completo da fonteSchröder, Thorsten [Verfasser], e Oliver [Akademischer Betreuer] Oeckler. "Synthesis, thermal behavior and thermoelectric properties of disordered tellurides with structures derived from the rocksalt type / Thorsten Schröder. Betreuer: Oliver Oeckler". München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1056876557/34.
Texto completo da fonteDeville, Quentin. "Nouvelles phases désordonnées de type Rocksalt comme matériaux d'électrode positive à haute densité d'énergie pour batteries lithium-ion". Electronic Thesis or Diss., Bordeaux, 2023. http://www.theses.fr/2023BORD0469.
Texto completo da fonteIn commercial Li-ion batteries, positive electrodes are primarily composed of layered nickel or cobalt oxide-based materials. Replacing these two cations has become a necessity due to ethical, ecological, and economic reasons, as well as concerns about their scarcity. To increase capacity, structural stability, and use transition metals that are less critical, such as manganese, disordered materials with a NaCl-type structure have emerged as one of the solutions among many explored possibilities. With a stable three-dimensional structure, over-lithiated disordered rocksalt materials have demonstrated reversible specific capacities exceeding 200 mAh.g-1. One commonly employed synthesis method is high-energy mechanosynthesis, which yields highly disordered materials. However, these materials, like their layered counterparts, suffer from irreversible oxygen oxidation at high voltage. It has been discovered that fluorination is an interesting approach to suppress this oxidation while preserving high capacities. In this study, the first goal was to understand how to choose between different precursor sets to obtain Li2MnO2F, a disordered material with a disordered rocksalt type structure. Subsequently, the impact of fluorination on the structural, morphological, and electrochemical properties of Li1.25Mn0.5+y/2Nb0.25-y/2O2-yFy (0 ≤ y ≤ 0.5) was studied at different scales. Nuclear Magnetic Resonance (NMR) studies of 7Li and 19F nuclei under magic angle spinning, coupled with X-ray Diffraction (XRD) and Pair Distribution Function (PDF) analysis, allowed detailed examination of the materials' structures at various scales. Ex-situ and in-situ experiments conducted via X-ray Absorption Spectroscopy (XAS) at the synchrotron enabled the study of redox mechanisms involved during cycling. In the first part, it was demonstrated that the progress of mechanosynthesis could be tracked by XRD and at a local scale by NMR. These analyses highlighted the necessity for an extended reaction period. Subsequently, it was observed that the nature of the precursors, with minimal variations (replacing Mn2O3 and Li2O with LiMnO2), had a negligible impact on the structural and electrochemical properties of Li2MnO2F. The second part of the study showed through TEM-EDX that it was possible to uniformly introduce fluorine fractions greater than 0.2 into Li1.25Mn0.5+y/2Nb0.25-y/2O2-yFy via mechanosynthesis. While at the particle scale fluorination seemed uniform, introducing significant fractions of fluorine appeared to deviate the surrounding cations repartition from the statistical distribution around lithium (6% more lithium). This increased fluorination also led to a decrease in the lattice parameter observed by XRD and PDF, tending to create lithium and niobium-rich environments around fluorine, as noted with NMR by studying diamagnetic-to-paramagnetic environment ratios. Morphology did not change with fluorination and consisted of agglomerated nanometric primary particles in clusters of several hundred nanometres. Electrochemically, it was shown that two redox mechanisms occurred: first, the oxidation of manganese from +III to +IV, followed by oxygen oxidation starting from 4.5 V vs Li+/Li. The irreversible contribution of this second irreversible contribution to the capacity could be mitigated for materials Li1.25Mn0.55Nb0.2O1.9F0.1, Li1.25Mn0.6Nb0.15O1.8F0.2, Li1.25Mn0.65Nb0.1O1.7F0.3 and eliminated for higher fluorination rates. Thus, it was demonstrated that an optimal composition could be achieved for fluorination amount between 0.2 and 0.4 in Li1.25Mn0.5+y/2Nb0.25-y/2O2-yFy. Within this range, these materials exhibited the lowest polarisation and good capacity retention while preserving a high capacity exceeding 200 mAh.g-1 after 20 discharge cycles
Trabalhos de conferências sobre o assunto "Disordered Rocksalt"
"Understanding short range order in disordered rocksalt cathodes from diffuse scattering and ADF images". In Microscience Microscopy Congress 2023 incorporating EMAG 2023. Royal Microscopical Society, 2023. http://dx.doi.org/10.22443/rms.mmc2023.165.
Texto completo da fonte