Interface‐Engineered All‐Solid‐State Li‐Ion Batteries Based on Garnet‐Type Fast Li+ Conductors. Issue 19 (12th July 2016)

• Record Type: Journal Article
• Authors: van den Broek, Jan; Afyon, Semih; Rupp, Jennifer L. M.
• Is Part Of: Advanced energy materials. Volume 6:Issue 19(2016)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-07-12
• Subjects: Al‐doped Li7La3Zr2O12 -- anode -- garnet -- ionic conductivity -- Li4Ti5O12 -- Li‐ion batteries -- solid electrolyte; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201600736
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract : All‐solid‐state Li‐ion batteries based on Li7 La3 Zr2 O12 (LLZO) garnet structures require novel electrode assembly strategies to guarantee a proper Li + transfer at the electrode–electrolyte interfaces. Here, first stable cell performances are reported for Li‐garnet, c‐Li6.25 Al0.25 La3 Zr2 O12, all‐solid‐state batteries running safely with a full ceramics setup, exemplified with the anode material Li4 Ti5 O12 . Novel strategies to design an enhanced Li + transfer at the electrode–electrolyte interface using an interface‐engineered all‐solid‐state battery cell based on a porous garnet electrolyte interface structure, in which the electrode material is intimately embedded, are presented. The results presented here show for the first time that all‐solid‐state Li‐ion batteries with LLZO electrolytes can be reversibly charge–discharge cycled also in the low potential ranges (≈1.5 V) for combinations with a ceramic anode material. Through a model experiment, the interface between the electrode and electrolyte constituents is systematically modified revealing that the interface engineering helps to improve delivered capacities and cycling properties of the all‐solid‐state Li‐ion batteries based on garnet‐type cubic LLZO structures. Abstract : The interface engineered all‐solid‐state batteries of c‐Li6.25 Al0.25 La3 Zr2 O12 deliver reduced resistance values and enhanced electrochemical properties. A reversible charge–discharge behavior can be obtained with Li4 Ti5 O12 showing for the first time that all‐solid‐state batteries with Li7 La3 Zr2 O12 solid electrolytes can be reversibly cycled in lower potential ranges (≈1.5 V) with anode materials.