title: Surface/Interface Effects on High-Performance Thin-Film All-Solid-State Li-Ion Batteries.
abstract: The further development of all-solid-state batteries is still limited by the understanding/engineering of the interfaces formed upon cycling. Here, we correlate the morphological, chemical, and electrical changes of the surface of thin-film devices with Al negative electrodes. The stable Al-Li-O alloy formed at the stress-free surface of the electrode causes rapid capacity fade, from 48.0 to 41.5 μAh/cm(2) in two cycles. Surprisingly, the addition of a Cu capping layer is insufficient to prevent the device degradation. Nevertheless, Si electrodes present extremely stable cycling, maintaining >92% of its capacity after 100 cycles, with average Coulombic efficiency of 98%.
authors.forename: Chen
authors.initials: C
authors.lastname: Gong
authors.affiliation: Sensors and Electron Devices Directorate, US Army Research Laboratory , Adelphi, Maryland 20783, United States.|Material Measurement Laboratory, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States.
authors.forename: Dmitry
authors.initials: D
authors.lastname: Ruzmetov
authors.forename: Alexander
authors.initials: A
authors.lastname: Pearse
authors.forename: Dakang
authors.initials: D
authors.lastname: Ma
authors.forename: Jeremy N
authors.initials: JN
authors.lastname: Munday
authors.forename: Gary
authors.initials: G
authors.lastname: Rubloff
authors.affiliation: Sandia National Laboratories , Livermore, California 94550, United States.
authors.forename: A Alec
authors.initials: AA
authors.lastname: Talin
authors.forename: Marina S
authors.initials: MS
authors.lastname: Leite
keywords: all-solid-state batteries; aluminum; energy storage; silicon; thin-films