▎ 摘　　要

Graphene-based electrodes with rational structural design have shown extraordinary prospect for en-hanced electrical double-layer capacitance of micro-supercapacitors (MSCs). Herein, a facile fabrication method for flexible planar MSCs based on hierarchical graphene was demonstrated by using a laser -treated membrane for electrode patterning, complemented with hierarchical electrode configuration tak-ing full advantages of size-determined functional graphene. The in-plane interdigital shape of MSCs was defined through vacuum filtration with the assistance of the functionalized polypropylene (PP) mem-brane. The hierarchical graphene films were built by macroscopic assembly based on size effect of differ-ent lateral sized graphene sheets (rGO-LSL). The sample of MSCs based on rGO-L SL (MSCs-L SL) exhibited excellent volumetric capacitance of 6.7 F cm -3 and high energy density of 0.37 mWh cm -3. The MSCs-LSL presented superb flexibility and cycling stability with no capacitance deteroriated after 20 0 0 cycles. This newly developed fabrication strategy is of good scalability and designability to manufacture flexible elec-trode for MSCs with customized shapes, while the construction of hierarchical graphene can enlighten the structural design of analogous two-dimensional materials for potential advanced electronics.(c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.