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An ultrafast self‐propagating high‐temperature synthesis technique offers scalable routes for the fabrication of mesoporous graphene directly from CO2. Due to the excellent electrical conductivity and high ion‐accessible surface area, supercapacitor electrodes based on the obtained graphene exhibit superior energy and power performance. The capacitance retention is higher than 90% after one million...
A surface‐modified Co3O4 ultrathin nanosheet (denoted as PCO) is reported via controllable phosphate ion functionalization for pseudocapacitors. An energy density of 71.6 W h kg−1 (at 1500 W kg−1) is achieved by the PCO‐based pseudocapacitor. The unique porous nanosheet morphology, high surface reactivity, and fast electrode kinetics of PCO are found to be responsible for the enhanced pseudocapacitive...
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