Ni–Al–Cr superalloy as high temperature cathode current collector for advanced thin film Li batteries. Issue 36 (4th June 2018)

• Record Type: Journal Article
• Authors: Filippin, Alejandro N.; Lin, Tzu-Ying; Rawlence, Michael; Zünd, Tanja; Kravchyk, Kostiantyn; Sastre-Pellicer, Jordi; Haass, Stefan G.; Wäckerlin, Aneliia; Kovalenko, Maksym V.; Buecheler, Stephan
• Is Part Of: RSC advances. Volume 8:Issue 36(2018)
• Page Start: 20304
• Page End: 20313
• Publication Date: 2018-06-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra02461h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A novel cathode current collector based on a Ni–Al–Cr superalloy is presented here. The suitability of this superalloy as a high voltage current collector was verified by crystallizing and cycling of LiCoO2 directly onto it. Abstract : To obtain full advantage of state-of-the-art solid-state lithium-based batteries, produced by sequential deposition of high voltage cathodes and promising oxide-based electrolytes, the current collector must withstand high temperatures (>600 °C) in oxygen atmosphere. This imposes severe restrictions on the choice of materials for the first layer, usually the cathode current collector. It not only must be electrochemically stable at high voltage, but also remain conductive upon deposition and annealing of the subsequent layers without presenting a strong diffusion of its constituent elements into the cathode. A novel cathode current collector based on a Ni–Al–Cr superalloy with target composition Ni0.72 Al0.18 Cr0.10 is presented here. The suitability of this superalloy as a high voltage current collector was verified by determining its electrochemical stability at high voltage by crystallizing and cycling of LiCoO2 directly onto it.