Figure 16.

a) Dependence of the gravimetric capacity of Zn‐Co‐S@HTCSs‐NF on the applied current density. Reproduced with permission.^{[ 366 ]} Copyright 2019, Elsevier. b) Capacitance variation of the fabricated ASCs as a function of cycle number measured at different current densities. Reproduced with permission.^{[ 366 ]} Copyright 2019, Elsevier. c) Schematic illustration of heteroatom self‐doped porous carbon derived from biomass sources. Reproduced with permission.^{[ 363 ]} Copyright 2020, Elsevier. d) GCD curves of PAN/Konjac‐800‐1 at various current densities of 0.5–20 A g⁻¹. Reproduced with permission.^{[ 369 ]} Copyright 2020, ACS. e) Photo of a flexible solid‐state supercapacitor. Reproduced with permission.^{[ 369 ]} Copyright 2020, ACS. f) Capacitance retention after 2000 cycles of bending. Reproduced with permission.^{[ 369 ]} Copyright 2020, ACS. g) Morphology evolution of pencil shaving derived carbon through different activation temperature. Reproduced with permission.^{[ 373 ]} Copyright 2020, Elsevier.