Phosphate Ion Functionalized Co 3 O 4 Ultrathin Nanosheets with Greatly Improved Surface Reactivity for High Performance Pseudocapacitors

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 performance. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than…

• PA
  Priority Academic Program Development of Jiangsu Higher Education Institutions
• FR
  Fundamental Research Funds for the Central Universities

  Award: 30915011204