Research group of Prof. Yat Li from University of California, Santa Cruz made progress on supercapacitors and published their work on Nano Lett..
Supercapacitors are charge (electrical energy) storage devices similar as lithium ion batteries. Enhancing the amount of charges supercapacitors are able to store during ultrafast charging has been a long-standing challenge. By designing and synthesizing a carbon electrode with different sized pores (from micrometers to nanometers) assembled in a hierarchical pattern, the group managed to push the ultrafast charge storage capability of a supercapacitor to a record-high level, reaching 235.9±7.5 F g–1 at 500 A g–1. The reasons for such the drastic performance improvement lie in ultrahigh surface area (~3000 m2 g–1), facilitated ion diffusion and electron transport.
The link of the full paper: http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b00533