Corrigendum to "Stable high-voltage aqueous pseudocapacitive energy storage device with slow self-discharge" [Nano Energy 64 (2019) 103961]. (June 2020) - Avireddy, Hemesh; Byles, Bryan W.; Pinto, David; Delgado Galindo, Jose Miguel; Biendicho, Jordi Jacas; Wang, Xuehang; Flox, Cristina; Crosnier, Olivier; Brousse, Thierry; Pomerantseva, Ekaterina; Morante, Joan Ramon; Gogotsi, Yury