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Identifying the Ele...
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Blidberg, Andreas,1987-Uppsala universitet,Strukturkemi
(författare)
Identifying the Electrochemical Processes in LiFeSO4F Cathodes for Lithium Ion Batteries
- Artikel/kapitelEngelska2017
Förlag, utgivningsår, omfång ...
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2017-04-25
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Wiley,2017
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printrdacarrier
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LIBRIS-ID:oai:DiVA.org:uu-317003
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-317003URI
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https://doi.org/10.1002/celc.201700192DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:vet swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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The electrochemical performance of tavorite LiFeSO4F can be considerably improved by coating the material with a conducting polymer (poly(3,4-ethylenedioxythiophene); PEDOT). Herein, the mechanisms behind the improved performance are studied systematically by careful electrochemical analysis. It is shown that the PEDOT coating improves the surface reaction kinetics for the Li-ion insertion into LiFeSO4F. For such coated materials no kinetic limitations remain, and a transition from solid state to solution-based diffusion control was observed at 0.6 mA cm−2 (circa C/2). Additionally, the quantity of PEDOT is optimized to balance the weight added by the polymer and the improved electrochemical function. Post mortem analysis shows excellent stability for the LiFeSO4F-PEDOT composite, and maintaining the electronic wiring is the most important factor for stable electrochemical cycling of LiFeSO4F. The insights and the methodology used to determine the rate-controlling steps are readily transferable to other ion-insertion-based electrodes, and the findings are important for the development of improved battery electrodes.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Sobkowiak, AdamUppsala universitet,Strukturkemi(Swepub:uu)adaso289
(författare)
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Tengstedt, CarlScania CV AB, Södertälje
(författare)
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Valvo, MarioUppsala universitet,Strukturkemi(Swepub:uu)marva692
(författare)
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Gustafsson, Torbjörn,1949-Uppsala universitet,Strukturkemi(Swepub:uu)tgu19364
(författare)
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Björefors, Fredrik,1971-Uppsala universitet,Strukturkemi(Swepub:uu)fbj01617
(författare)
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Uppsala universitetStrukturkemi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:ChemElectroChem: Wiley4:8, s. 1896-19072196-0216
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