Rethinking Pseudocapacitance: A Way to Harness Charge Storage of Crystalline RuO2

• DOI: 10.1021/acsaem.0c00476
• Publication Date: 2020-05-04T20:49:47Z
• Authors: Ankita Jadon; Sagar Prabhudev; Gaëtan Buvat; Sai Gourang Patnaik; Mehdi Djafari-Rou...; Alain Estève; Daniel Guay; David Pech
• Keywords: Pseudocapacitance

With its huge pseudocapacitance and excellent stability, ruthenium dioxide (RuO2) is considered to be one of the best electrode materials for supercapacitors. However, such properties are only obtained with hydrous RuO2 in an amorphous phase, limiting range possible deposition techniques. Herein we report a detailed understanding reactions protons (H+) occurring crystalline regard orientation using density functional theory. In particular, show that migration pathways energetically favorable along [001] direction, leading deeper H+ penetration within bulk active material much higher charge storage ability.