Compacting Electric Double Layer Enables Carbon Electrode with Ultrahigh Zn Ion Storage Capability

• DOI: 10.1002/anie.202214773
• Publication Date: 2022-10-27T10:24:22Z
• Authors: Xin Shi; Jinhao Xie; Fan Yang; Fuxin Wang; Dezhou Zheng; Xianshuo Cao; Yanxia Yu; Qi Liu; Xihong Lu
• Keywords: Carbon fibers

Carbon-based cathodes for aqueous zinc ion hybrid supercapacitors (ZHSCs) typically undergo low Zn storage capability due to their electric double layer capacitance (EDLC) energy mechanism that is restricted by specific surface area and thickness of (EDL). Here, we report a universal charge modulation strategy effectively enhance the carbon materials decreasing EDL. Amino groups with lone pair electrons were chosen increase density enhanced interaction between electrode ions, thus compacting Consequently, amino functionalized porous based ZHSCs can deliver an ultrahigh capacity 255.2 mAh g-1 along excellent cycling stability (95.5 % retention after 50 000 cycles) in 1 M ZnCl2 electrolyte. This study demonstrates feasibility EDL modified as Zn2+ cathode great prospect constructing high performance ZHSCs.