Phosphate Ion Functionalized Co3 O4 Ultrathin Nanosheets with Greatly Improved Surface Reactivity for High Performance Pseudocapacitors

Teng Zhai; Liming Wan; Shuo Sun; Qi Chen; Jiao Sun; Qiuying Xia; Hui Xia

doi:10.1002/adma.201604167

Phosphate Ion Functionalized Co₃ O₄ Ultrathin Nanosheets with Greatly Improved Surface Reactivity for High Performance Pseudocapacitors

Adv Mater. 2017 Feb;29(7). doi: 10.1002/adma.201604167. Epub 2016 Dec 6.

Authors

Teng Zhai^{1

2}, Liming Wan^{1

2}, Shuo Sun^{1

2}, Qi Chen^{1

2}, Jiao Sun¹, Qiuying Xia^{1

2}, Hui Xia^{1

2}

Affiliations

¹ School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
² Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing, 210094, China.

PMID: 27922736
DOI: 10.1002/adma.201604167

Abstract

A surface-modified Co₃ O₄ 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.

Keywords: cobalt oxide; nanosheets; supercapacitors.