Výsledky vyhledávání - "Ronald Väli"

Akademický článek

Glycine-Nitrate Process for Synthesis of Na3V2(PO4)3 Cathode Material and Optimization of Glucose-Derived Hard Carbon Anode Material for Characterization in Full Cells

Autor: Ronald Väli, Jaan Aruväli, Meelis Härmas, Alar Jänes, Enn Lust

Publikováno v: Batteries, Vol 5, Iss 3, p 56 (2019)

Cost-effective methods need to be developed to lower the price of Na-ion battery (NIB) materials. This paper reports a proof-of-concept study of using a novel approach to the glycine-nitrate process (GNP) to synthesize sodium vanadium phosphate (Na3V

Externí odkaz: https://doaj.org/article/4e04fd35b14e4644af9ef69b323026b8

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Operando XRD study on the Effect of Boron Doping on the Failure Mechanisms of Na-, Ni- and Mn-based Positive Electrodes in Sodium-Ion Batteries

Autor: Ove Korjus, Ronald Väli, Anu Adamson, Enn Lust, Jaan Aruväli, Alar Jänes

Publikováno v: ECS Transactions. 104:99-106

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91b39cd8ad4759b8cd4037fdc89337f8
https://doi.org/10.1149/10401.0099ecst

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Following the in-plane disorder of sodiated hard carbon through operando total scattering

Autor: Ronald Väli, Kirsten M. Ø. Jensen, Enn Lust, Jon Fold von Bülow, Jette K. Mathiesen, Poul Norby, Meelis Härmas

Publikováno v: Journal of Materials Chemistry A. 7:11709-11717

Successfully enabling a new battery technology, such as sodium-ion batteries, requires a thorough understanding of the functional properties of its building blocks. Knowing how the electrode materials behave upon operation is crucial to gain insight

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8fc9b1e6cba26e81819087c477b085e1
https://doi.org/10.1039/c9ta02413a

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Lessons Learned from Long-Term Cycling Experiments with Pouch Cells with Li-Rich and Mn-Rich Positive Electrode Materials

Autor: Ronald Väli, Stuart Aftanas, A. Eldesoky, Aaron Liu, Tina Taskovic, Jessie E. Harlow, Jack deGooyer, Nutthaphon Phattharasupakun, Dongxu Ouyang, Divya Rathore, Marc M. E. Cormier, Michel B. Johnson, HongNam Nguyen, HunHo Kwak, Shinichi Kumakura, Jens Paulsen, J. R. Dahn

Publikováno v: Journal of The Electrochemical Society. 169:060530

In this work, the performance of commercial (250–300 mAh) Li1.11Ni0.34Mn0.53Al0.02O2/graphite (LNMA) and Li1.167Ni0.183Mn0.558Co0.092O2/graphite (LNMC) pouch cells was evaluated using different cycling drive profiles, temperatures, formation voltag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b441a99e78a80acc45bcd30fb688fee1
https://doi.org/10.1149/1945-7111/ac76e8

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Peat derived hard carbon electrodes with superior capacity for sodium ion batteries

Autor: Miriam Koppel, Maarja Paalo, Enn Lust, Tavo Romann, Jaak Nerut, Jaan Aruväli, Rasmus Palm, Ronald Väli, Eneli Härk, Anu Adamson, Alar Jänes

Herein we demonstrate how peat, abundant and cheap biomass, can be successfully used as a precursor to synthesize peat derived hard carbons PDCs , applicable as electrode materials for sodium ion batteries SIB . The PDCs were obtained by pre pyrolysi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f31f2dcb19fdba42815ebd3fa088a3a
http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=102670

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Tracking the Fate of Excess Li in the Synthesis of Various Liy[Ni1−xMnx]O2 Positive Electrode Materials Under Different Atmospheres

Autor: Aaron Liu, Nutthaphon Phattharasupakun, Ronald Väli, Dongxu Ouyang, J. R. Dahn

Publikováno v: Journal of The Electrochemical Society. 169:030538

Various Ni-rich Liy[Ni1−xMnx]O2 (x = ∼0.08, 0.2, 0.5) materials were synthesized with excess Li precursor in oxygen, dry air or air to understand what happens to the excess Li during synthesis. The Li[Ni1−xMnx]O2 components of the synthesized m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b5b2c6233a00d105ce6ffebaf190f44
https://doi.org/10.1149/1945-7111/ac5483

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