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Probing the charged state of layered positive electrodes in sodium-ion batteries : reaction pathways, stability and opportunities

Stansby, Jennifer H.; Sharma, Neeraj; Goonetilleke, Damian

Abstract:
Sodium-ion batteries have received significant interest as a cheaper alternative to lithium-ion batteries and could be more viable for use in large scale energy storage systems. However, similarly to lithium-ion batteries, their performance remains limited by the positive electrode materials. Layered transition metal oxides, with chemical formula NaxMO2, have been extensively investigated and appear to show the most promise. However, the inability to reversibly extract large amounts of sodium ions from these layered structures, by charging to high voltages, has limited the useful capacity and cycle life of these materials. To address this, numerous studies have attempted to resolve the structural and chemical changes that take place in positive electrode materials upon cycling. This is particularly important at and near the charged state, which is where the materials' structures are highly sodium deficient. Following a brief introduction into the status of sodium-ion battery positive electrodes, this work focuses on the development of knowledge and understanding into the structure of layered oxides at the charged state by highlighting cutting edge characterisation techniques that have been utilised. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000128297
Veröffentlicht am 02.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 21.12.2020
Sprache Englisch
Identifikator ISSN: 2050-7488, 2050-7496
KITopen-ID: 1000128297
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in Journal of materials chemistry / A
Verlag Royal Society of Chemistry (RSC)
Band 8
Heft 47
Seiten 24833-24867
Vorab online veröffentlicht am 19.11.2020
Nachgewiesen in Web of Science
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Scopus
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