▎ 摘　　要

Laser-scribed graphene (LSG) electrodes have gained popularity in many miniaturized and lab on chip systems such as micro-energy harvester, flexible electronics, portable power storage, electrochemical sensors, etc. This study presents the development of a fuel cell on a cellulose filter paper with integrated LSG electrodes. Here, cellulose paper acts as a microchannel to transport the fluids through capillary action. Paper devices offer several important advantages, including the elimination of membrane and external pumps with the integrated co-laminar flow through embedded capillary systems. Herein, the paper-LSG fuel cell uses HCOOH and H2SO4 as fuel and electrolyte, respectively. Experiments have been performed to enhance the performance of paper-LSG fuel cell by optimizing various electrode types (Plain LSG, Multi-walled carbon nanotubes (MWCNT)/LSG, Pure MWCNT), concentration of fuel and electrolyte, and different grades of cellulose paper microchannels to understand the impact to the porosity of paper. The developed paper-LSG fuel cell, with MWCNT/LSG as an optimized electrode, delivered a peak current density (CD) of 166.82 mu A/cm(2), and power density (PD) of 14.42 mu W/cm(2), at a stable OCP of 350 mV with Grade-1 cellulose microchannel. Such fuel cells are amenable to be utilized for sustainably powering various microelectronic devices.