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000904014 1001_ $$0P:(DE-HGF)0$$aXu, Pengyu$$b0
000904014 245__ $$aOrigin of High Interfacial Resistance in Solid‐State Batteries: LLTO/LCO Half‐Cells**
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000904014 520__ $$aThe interface between cathode and electrolyte is a significant source of large interfacial resistance in solid-state batteries (SSBs). Spark plasma sintering (SPS) allows densifying electrolyte and electrodes in one step, which can improve the interfacial contact in SSBs and significantly shorten the processing time. In this work, we proposed a two-step joining process to prepare cathode (LiCoO2, LCO)/electrolyte (Li0.33La0.57TiO3, LLTO) half cells via SPS. Interdiffusion between Ti4+/Co3+ was observed at the interface by SEM/STEM, resulting in the formation of the Li−Ti−La−Co−O and Li−Ti−Co−O phases in LLTO and the Li−Co−Ti−O phase in LCO. Computational modeling was performed to verify that the Li−Ti−Co−O phase has a LiTi2O4 host lattice. In a study of interfacial electrical properties, the resistance of this interdiffusion layer was found to be 105 Ω, which is 40 times higher than the resistance of the individual LLTO phase. The formation of an interdiffusion layer is identified as the origin of the high interface resistance in the LLTO/LCO half-cell.
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000904014 7001_ $$0P:(DE-Juel1)185039$$aRheinheimer, Wolfgang$$b1$$ufzj
000904014 7001_ $$0P:(DE-HGF)0$$aMishra, Avanish$$b2
000904014 7001_ $$0P:(DE-HGF)0$$aShuvo, Shoumya Nandy$$b3
000904014 7001_ $$0P:(DE-HGF)0$$aQi, Zhimin$$b4
000904014 7001_ $$0P:(DE-HGF)0$$aWang, Haiyan$$b5
000904014 7001_ $$0P:(DE-HGF)0$$aDongare, Avinash M.$$b6
000904014 7001_ $$00000-0001-6059-0346$$aStanciu, Lia A.$$b7$$eCorresponding author
000904014 773__ $$0PERI:(DE-600)2724978-5$$a10.1002/celc.202100189$$gVol. 8, no. 10, p. 1847 - 1857$$n10$$p1847 - 1857$$tChemElectroChem$$v8$$x2196-0216$$y2021
000904014 8564_ $$uhttps://juser.fz-juelich.de/record/904014/files/ChemElectroChem%20-%202021%20-%20Xu%20-%20Origin%20of%20High%20Interfacial%20Resistance%20in%20Solid%25u2010State%20Batteries%20LLTO%20LCO%20Half%25u2010Cells.pdf$$yRestricted
000904014 8564_ $$uhttps://juser.fz-juelich.de/record/904014/files/Origin%20of%20High%20Interfacial%20Resistance.pdf$$yPublished on 2021-04-12. Available in OpenAccess from 2022-04-12.
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