%0 Journal Article
%T CeO2-x quantum dots decorated nitrogen-doped hollow porous carbon for supercapacitors.
%A Kar T
%A Casales-Díaz M
%A Ramos-Hernández JJ
%A Sotelo-Mazón O
%A Henao J
%A Valdez Rodríguez S
%A Godavarthi S
%A Liu S
%A Yamauchi Y
%A Kesarla MK
%A Kar T
%A Casales-Díaz M
%A Ramos-Hernández JJ
%A Sotelo-Mazón O
%A Henao J
%A Valdez Rodríguez S
%A Godavarthi S
%A Liu S
%A Yamauchi Y
%A Kesarla MK
%J J Colloid Interface Sci
%V 622
%N 0
%D Sep 2022 15
%M 35490618
%F 9.965
%R 10.1016/j.jcis.2022.04.114
%X The pseudocapacitive properties of CeO2 are largely dependent on its surface Faradaic redox reaction kinetics; however, its electrochemical performance is still limited by the low utilization due to the inefficient diffusionfreeways and the limited active sites. Herein, we prepare a 0D/3D composite composed of oxygen-deficient CeO2 quantum dots (0D) anchored on a 3D hollow porous N-doped carbon framework (CeO2-x QD@PHC) via a facile template-confined strategy followed by a chemical co-precipitation. The refined QDs and hollow structure greatly shorten the ion diffusion paths and lower the internal strain during cycling. The integration of CeO2-x QDs with PHC structure endows enriched accessible active sites and enhances the electrical properties. As a result, the optimized CeO2-x QD@PHC exhibits an improved specific capacitance and good rate performance in comparison to those of the CeO2-x-free PHC. Moreover, a symmetric supercapacitor with CeO2-x QD@PHC as an electrode is constructed, delivering a high energy density of 3.874 Wh kg-1 at a power density of 149.98 W kg-1.