O 3 thin fi lms attain unprecedented durability by potentiostatic pretreatment †

Department of Engineering Sciences, The Å P.O. Box 534, SE-751 21 Uppsala, Sweden. E MIIT Key Laboratory of Critical Materials T Storage, School of Chemistry and Chem Technology, 150001 Harbin, China Department of Physics and Astronomy, The P.O. Box 516, SE-751 20 Uppsala, Sweden † Electronic supplementary informa 10.1039/c8ta09621j ‡ These authors contributed equally to th Cite this: J. Mater. Chem. A, 2019, 7, 2908