Phosphorus-doped mesoporous carbons(PMCs)were prepared using a self-doping and self-templating approach via direct pyrolysis of sodium phytate(C_(6)H_(17)NaO_(24)P_(6)).The one-pot method allows simultaneous carboniza...Phosphorus-doped mesoporous carbons(PMCs)were prepared using a self-doping and self-templating approach via direct pyrolysis of sodium phytate(C_(6)H_(17)NaO_(24)P_(6)).The one-pot method allows simultaneous carbonization and P doping,eliminating the need for pre-synthesis or post-activation treatment.The C_(6)H_(17)NaO_(24)P_(6)is the source of both carbon and phosphorus,and the nano-Na_(4)P_(2)O_(7)particles produced during pyrolysis act as hard templates for the honeycomb mesoporous structure with high specific surface area(884–827m^(2)/g),large mesopore volume ratio(67%–75%)and rich phosphorus content(0.53–2.34 at%).As electrodes of supercapacitors in 6 mol/L KOH,the PMCs showed outstanding performance with a high capacitance of 202 F/g and excellent rate performance of 148 F/g at 30 A/g.In addition,the PMCs-based symmetrical supercapacitors can operate in an expanded working voltage of 0–1.6 V in 3mol/L H_(2)SO_(4)aqueous electrolytes with high-density energy of 11.8 Wh/kg.展开更多
基金supported by the National Natural Science Foundation of China(No.52273274)State Key Laboratory of Organic-Inorganic Composites(No.oic-202101010)Natural Science Basic Research Project of Shaanxi Province(No.2022JQ-123).
文摘Phosphorus-doped mesoporous carbons(PMCs)were prepared using a self-doping and self-templating approach via direct pyrolysis of sodium phytate(C_(6)H_(17)NaO_(24)P_(6)).The one-pot method allows simultaneous carbonization and P doping,eliminating the need for pre-synthesis or post-activation treatment.The C_(6)H_(17)NaO_(24)P_(6)is the source of both carbon and phosphorus,and the nano-Na_(4)P_(2)O_(7)particles produced during pyrolysis act as hard templates for the honeycomb mesoporous structure with high specific surface area(884–827m^(2)/g),large mesopore volume ratio(67%–75%)and rich phosphorus content(0.53–2.34 at%).As electrodes of supercapacitors in 6 mol/L KOH,the PMCs showed outstanding performance with a high capacitance of 202 F/g and excellent rate performance of 148 F/g at 30 A/g.In addition,the PMCs-based symmetrical supercapacitors can operate in an expanded working voltage of 0–1.6 V in 3mol/L H_(2)SO_(4)aqueous electrolytes with high-density energy of 11.8 Wh/kg.
