木质素-纤维素协同热解制备超级电容器用多孔炭OA

The enzymatic lignin and cellulose-containing waste textiles were taken as co-precursor,of which the lignin and cellulose were tak-en as composite carbon sources,to prepare porous carbon(TLPC)applied in supercapacitors with high specific surface area via a one-step carbonization-activation.The microporous structure and electrochemical performances of TLPC samples were systematically investigated.The results showed that at a carbonization temperature of 800℃,the prepared TLPC-800 exhibited a high specific capacitance of 275 F/g at a current density of 0.5 A/g.When assembled into a symmetric coin-type supercapacitor,the device delivered an energy density of 13.54 Wh/kg at a power density of 325 W/kg.After 10 000 charge-discharge cycles,the capacitance retention rate reached nearly 99.6％with a coulombic efficiency of approximately 100％,indicating an excellent cycling stability.In addition,the assembled large-volume flexible solid-state super-capacitor also presented favorable electrochemical performance.