Wei, Q., Q. Li, Y. Jiang, Y. Zhao, S. Tan, J. Dong, L. Mai, and D. Peng. “High-Energy and High-Power Pseudocapacitor–Battery Hybrid Sodium-Ion Capacitor With Na+ Intercalation Pseudocapacitance Anode”. Nano-Micro Letters, vol. 13, Jan. 2021, p. 55, doi:10.1007/s40820-020-00567-2.