000887829 001__ 887829 000887829 005__ 20240711085554.0 000887829 0247_ $$2doi$$a10.1002/celc.201901068 000887829 0247_ $$2Handle$$a2128/26486 000887829 0247_ $$2altmetric$$aaltmetric:65812048 000887829 0247_ $$2WOS$$aWOS:000485947800030 000887829 037__ $$aFZJ-2020-04455 000887829 082__ $$a540 000887829 1001_ $$0P:(DE-HGF)0$$aXu, Pengyu$$b0 000887829 245__ $$aOrigin of High Interfacial Resistances in Solid‐State Batteries: Interdiffusion and Amorphous Film Formation in Li 0.33 La 0.57 TiO 3 /LiMn 2 O 4 Half Cells 000887829 260__ $$aWeinheim$$bWiley-VCH$$c2019 000887829 3367_ $$2DRIVER$$aarticle 000887829 3367_ $$2DataCite$$aOutput Types/Journal article 000887829 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1607628664_4421 000887829 3367_ $$2BibTeX$$aARTICLE 000887829 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000887829 3367_ $$00$$2EndNote$$aJournal Article 000887829 520__ $$aThe large interfacial resistance between electrolyte and electrodes poses a significant roadblock for the application of all‐solid‐state batteries. The formation of interfacial phases (interphases) has been identified as one of the most significant sources for such high resistance. Therefore, studying the mechanism of interphase formation, along with investigating its effect on ionic conductivity, could lead to the discovery of avenues towards designing high‐performance all‐solid‐state batteries. In this work, we studied the interphase formation in the perovskite electrolyte Li0.33La0.57TiO3 (LLTO) and spinel cathode LiMn2O4 (LMO) pair by co‐sintering experiments via spark plasma sintering (SPS), as well as conventional sintering. Although the processing method has an influence on the electrode/electrolyte contact, the formation of an interphase could not be avoided. At the LLTO/ LMO interface, we observed both an interphase formed by interdiffusion, as well as a complexion‐like amorphous layer. We directly characterized the complexion layer morphology by using HRTEM. Analytical TEM and SEM were used to reveal the elemental composition of the interphase and the interdiffusion layer. Furthermore, we used impedance spectroscopy to measure the electrical properties of the LLTO/LMO interphase and identified the interfacial resistance from the interdiffusion induced interphase to be larger than the individual phases by a factor of 40, whereas the amorphous layer was not visible in the impedance. 000887829 536__ $$0G:(DE-HGF)POF3-899$$a899 - ohne Topic (POF3-899)$$cPOF3-899$$fPOF III$$x0 000887829 588__ $$aDataset connected to CrossRef 000887829 7001_ $$0P:(DE-Juel1)185039$$aRheinheimer, Wolfgang$$b1$$ufzj 000887829 7001_ $$0P:(DE-HGF)0$$aShuvo, Shoumya Nandy$$b2 000887829 7001_ $$0P:(DE-HGF)0$$aQi, Zhimin$$b3 000887829 7001_ $$0P:(DE-HGF)0$$aLevit, Or$$b4 000887829 7001_ $$0P:(DE-HGF)0$$aWang, Haiyan$$b5 000887829 7001_ $$0P:(DE-HGF)0$$aEin‐Eli, Yair$$b6 000887829 7001_ $$00000-0001-6059-0346$$aStanciu, Lia A.$$b7$$eCorresponding author 000887829 773__ $$0PERI:(DE-600)2724978-5$$a10.1002/celc.201901068$$gVol. 6, no. 17, p. 4576 - 4585$$n17$$p4576 - 4585$$tChemElectroChem$$v6$$x2196-0216$$y2019 000887829 8564_ $$uhttps://juser.fz-juelich.de/record/887829/files/Xu19.pdf$$yRestricted 000887829 8564_ $$uhttps://juser.fz-juelich.de/record/887829/files/Pengyu_draftapril29_WR.pdf$$yPublished on 2019-08-20. 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