The natural critical current density limit for Li7La3Zr2O12 garnets

dc.bibliographicCitation.firstPage15782eng
dc.bibliographicCitation.issue31eng
dc.bibliographicCitation.journalTitleJournal of materials chemistry : A, Materials for energy and sustainabilityeng
dc.bibliographicCitation.lastPage15788eng
dc.bibliographicCitation.volume8eng
dc.contributor.authorFlatscher, Florian
dc.contributor.authorPhilipp, Martin
dc.contributor.authorGanschow, Steffen
dc.contributor.authorWilkening, H. Martin R.
dc.contributor.authorRettenwander, Daniel
dc.date.accessioned2021-11-09T06:47:45Z
dc.date.available2021-11-09T06:47:45Z
dc.date.issued2020
dc.description.abstractCeramic batteries equipped with Li-metal anodes are expected to double the energy density of conventional Li-ion batteries. Besides high energy densities, also high power is needed when batteries have to be developed for electric vehicles. Practically speaking, so-called critical current densities (CCD) higher than 3 mA cm-2 are needed to realize such systems. As yet, this value has, however, not been achieved for garnet-type Li7La3Zr2O12 (LLZO) being one of the most promising ceramic electrolytes. Most likely, CCD values are influenced by the area specific resistance (ASR) governing ionic transport across the Li|electrolyte interface. Here, single crystals of LLZO with adjusted ASR are used to quantify this relationship in a systematic manner. It turned out that CCD values exponentially decrease with increasing ASR. The highest obtained CCD value was as high as 280 µA cm-2. This value should be regarded as the room-temperature limit for LLZO when no external pressure is applied. Concluding, for polycrystalline samples either stack pressure or a significant increase of the interfacial area is needed to reach current densities equal or higher than the above-mentioned target value. This journal is © The Royal Society of Chemistry.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/7210
dc.identifier.urihttps://doi.org/10.34657/6257
dc.language.isoengeng
dc.publisherLondon [u.a.] : RSCeng
dc.relation.doihttps://doi.org/10.1039/c9ta14177d
dc.relation.essn2050-7496
dc.rights.licenseCC BY 3.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/eng
dc.subject.ddc540eng
dc.subject.ddc530eng
dc.subject.othercritical current densities (CCD)eng
dc.subject.otherarea specific resistance (ASR)eng
dc.subject.otherceramic batterieseng
dc.titleThe natural critical current density limit for Li7La3Zr2O12 garnetseng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccesseng
wgl.contributorIKZeng
wgl.subjectChemieeng
wgl.typeZeitschriftenartikeleng
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