Electrochemical Capacitors: Fabrication of High-Power Li-Ion Hybrid Supercapacitors by Enhancing the Exterior Surface Charge Storage (Adv. Energy Mater. 17/2015)

Lithium-ion hybrid electrochemical capacitors (Li-HSCs) are reported by Zhen Zhou and co-workers in article number 1500550. MnO nanoparticles are dispersed on graphene as battery-type anodes, and ultrathin N-doped porous carbon materials are used as capacitor cathodes. These Li-HSCs approach the level of energy density seen in Li-ion batteries, while maintaining supercapacitors' power density. Cover image drawn by Qiang Zhang and designed by Mei Yang and Yiren Zhong.