WFRF:(Menon Ashok S.)
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- Chien, Yu-Chuan,1990-Uppsala universitet,Strukturkemi (author)
Understanding the Impact of Precipitation Kinetics on the Electrochemical Performance of Lithium–Sulfur Batteries by Operando X-ray Diffraction
- Article/chapterEnglish2022
Publisher, publication year, extent ...
- 2022-02-03
- American Chemical Society (ACS),2022
- electronicrdacarrier
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- LIBRIS-ID:oai:DiVA.org:uu-453441
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-453441URI
- https://doi.org/10.1021/acs.jpcc.1c10197DOI
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- Language:English
- Summary in:English
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- The complex reaction mechanism of the lithium–sulfur battery system consists of re-petitive dissolution and precipitation of the sulfur-containing species in the positiveelectrode. In particular, the precipitation of lithium sulfide (Li2S) during discharge hasbeen considered a crucial factor for achieving a high degree of active material utiliza-tion. Here, the influence of electrolyte amount, electrode thickness, applied current andelectrolyte salt on the formation of Li2S is systematically investigated in a series ofoperando X-ray diffraction experiments. Through a combination of simultaneous dif-fraction and resistance measurements, the evolution of the intensity from Li2S is di-rectly correlated to the variation in internal resistance and transport properties insidethe positive electrode. The correlation indicates that at different stages, the Li2S precip-itation both facilitates and impedes the discharge process. The kinetic information ofLi2S formation offers mechanistic explanations for the strong impact of different elec-trochemical cell parameters on the performance and thus, directions for holistic optimi-zations to achieve high sulfur utilization.
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- Menon, Ashok S.Uppsala universitet,Strukturkemi(Swepub:uu)ashsr432 (author)
- Brant, WilliamUppsala universitet,Strukturkemi(Swepub:uu)wilbr976 (author)
- Lacey, MatthewScania CV AB(Swepub:uu)matla332 (author)
- Brandell, Daniel,1975-Uppsala universitet,Strukturkemi(Swepub:uu)dbr10334 (author)
- Uppsala universitetStrukturkemi (creator_code:org_t)
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- In:The Journal of Physical Chemistry C: American Chemical Society (ACS)126:6, s. 2971-29791932-74471932-7455
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