@article{Xu_Feng_Chen_Meng_Xia_Gu_Yang_Zhang_Yang_2021, title={Armoring Black Phosphorus Anode with Stable Metal–Organic-Framework Layer for Hybrid K-Ion Capacitors}, volume={13}, url={https://www.nmlett.org/index.php/nml/article/view/806}, DOI={10.1007/s40820-020-00570-7}, abstractNote={<p>Potassium-ion capacitors (KICs) are promising for sustainable and eco-friendly energy storage technologies, yet their slow reaction kinetics and poor cyclability induced by large <em>K</em>-ion size are a major obstacle toward practical applications. Herein, by employing black phosphorus nanosheets (BPNSs) as a typical high-capacity anode material, we report that BPNS anodes armored with an ultrathin oriented-grown metal–organic-framework (MOF) interphase layer (BPNS@MOF) exhibit regulated potassium storage behavior for high-performance KICs. The MOF interphase layers as protective layer with ordered pores and high chemical/mechanical stability facilitate <em>K</em> ion diffusion and accommodate the volume change of electrode, beneficial for improved reaction kinetics and enhanced cyclability, as evidenced by substantial characterizations, kinetics analysis and DFT calculations. Consequently, the BPNS@MOF electrode as KIC anodes exhibits outstanding cycle performance outperforming most of the reported state-of-art KICs so far.</p> <p>Highlights:</p> <p>1 The ultrathin metal–organic-framework (MOF) interphase layer with high mechanical/chemical stability was in situ grown on black phosphorus nanosheets (BPNSs).<br>2 MOF interphase layers as an ordered porous and robust protective layer can facilitate K ion diffusion and accommodate the volume change of the electrode.<br>3 Benefiting from the improved reaction kinetics and enhanced electrode stability, the BPNS@MOF anode for potassium-ion capacitors exhibits outstanding cycle performance.</p>}, journal={Nano-Micro Letters}, author={Xu, Mengzhu and Feng, Yutong and Chen, Bingjie and Meng, Ruijin and Xia, Mengting and Gu, Feng and Yang, Donglei and Zhang, Chi and Yang, Jinhu}, year={2021}, month={Jan.}, pages={42} }