Two Birds with One Stone: Cobalt/Silicon Species Encapsulated in MOF-derived Nitrogen-doped Carbon as an Integrated Electrode for Next-Generation Symmetric Pseudocapacitor with Energy Density over 100 Wh/kg

The concept of “two birds with one stone” is employed to fabricate a symmetric pseudocapacitor. The Si/Co with optimized content in the MOF-derived N-doped carbon-based electrode can work at an ultra-large potential window of −1.0 to 0.4 V.