On‐Chip Microsupercapacitors Based on Coordination Polymer Frameworks for Alternating Current Line‐Filtering

AC line-filtering on-chip micro-supercapacitors (MSCs) based on coordination polymer frameworks were fabricated by a facile layer-by-layer method. The reported on-chip MSCs showed a low impedance phase angle of −73° at 120 Hz and a high power density of up to 1323 W cm−3 with a low relaxation time constant of 0.27 ms.