This title appears in the Scientific Report : 2019 

A garnet structure-based all-solid-state Li battery without interface modification: resolving incompatibility issues on positive electrodes
Tsai, Chih-Long (Corresponding author)
Ma, Qianli / Dellen, Christian / Lobe, Sandra / Vondahlen, Frank / Windmüller, Anna / Grüner, Daniel / Zheng, Hao / Uhlenbruck, Sven / Finsterbusch, Martin / Tietz, Frank / Fattakhova-Rohlfing, Dina / Buchkremer, Hans Peter / Guillon, Olivier
Werkstoffstruktur und -eigenschaften; IEK-2
Werkstoffsynthese und Herstellungsverfahren; IEK-1
Sustainable energy & fuels, 3 (2019) 1, S. 280 - 291
Cambridge Royal Society of Chemistry 2019
10.1039/C8SE00436F
Journal Article
Electrochemical Storage
Please use the identifier: http://dx.doi.org/10.1039/C8SE00436F in citations.
The development of high-performance Li7La3Zr2O12 (LLZO)-based all-solid-state lithium batteries (SSLB) isusually hampered by highly resistive interfaces due to the need for sintering at elevated temperatures toform ionic diffusion paths through the grains. Many strategies have been proposed to solve the problembut the achievements have been limited. Herein, a new design principle is introduced, based on cosinteringcrystalline LCO and Ta-substituted LLZO instead of using the more reactive Li–Co–Oprecursors and Al-substituted LLZO, which allows the fabrication of high specific areal density and lowcell area resistance without the interface modification of LLZO-based SSLB. Detailed studies usingmicro-Raman and EDS mapping revealed that the well-sintered interfaces are free from detrimentalsecondary phases. To demonstrate that a true bulk-type SSLB can be constructed by this straightforwardstrategy, the material loading for a composite positive electrode was increased to about 10 times that inprevious reports, which resulted in a high areal capacity of 1.63 mA h cm2 (i.e. 110 mA h g1) whendischarged with a current density of 50 mA cm2. It also allows one to discharge the fabricated SSLB ata very high current density of 500 mA cm2 at 50 C due to the minimized cell areal resistance. The newfabrication strategy for the LLZO-based SSLB paves the way for achieving SSLB with high safety andenergy density.