Armoring Black Phosphorus Anode with Stable Metal–Organic-Framework Layer for Hybrid K-Ion Capacitors

Nano-Micro Letters

Feng Gu¹  Donglei Yang²  Yutong Feng³  Jinhu Yang³  Mengzhu Xu³  Chi Zhang³  Mengting Xia⁴  Ruijin Meng⁴  Bingjie Chen⁴ 

[1] Institute for Process Modelling and Optimization, Jiangsu Industrial Technology Research Institute, SIP;Institute of Molecular Medicine School of Medicine, Shanghai Jiao Tong University;Research Center for Translational Medicine & Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine;School of Chemical Science and Engineering, Tongji University;

关键词: Black phosphorus;    MOF;    Interphase engineering;    Potassium-ion capacitor;    Cycling stability;   

DOI  :  10.1007/s40820-020-00570-7

来源: DOAJ

【 摘 要 】

Abstract 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 K-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 K 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.

【 授权许可】

Unknown