3D frame-like architecture of N-C-incorporated mixed metal phosphide boosting ultrahigh energy density pouch-type supercapacitors. (January 2022)

• Record Type: Journal Article
• Authors: Xu, Le; Xi, Yukun; Li, Wenbin; Hua, Zile; Peng, Jianhong; Hu, Junhua; Zhou, Jiao-Jiao; Zhang, Peilin; Wang, Jingjing; Wang, Weiwei; Ding, Hualong; Wang, Wanqing; Ji, Wuxing; Yang, Yang; Xu, Xicheng; Chen, Luyang; Li, Xifei
• Is Part Of: Nano energy. Volume 91(2022)
• Publication Date: 2022-01
• Subjects: 3D hollow frame -- Co2−xNixP-N-C-2 -- MOFs -- DFT -- High energy density -- Hybrid supercapacitors; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2021.106630
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: The multi-compositional adjustment and distinctively architectural control have been challenging to modulate the electrochemical performance of favorable supercapacitor electrodes. Herein, three-dimensional hollow open frame-like architectures nickel cobalt phosphate with nitrogen doped carbon (Co2−x Nix P-N-C-2) converted from a metal-organic framework precursor is utilized as the functional electrode for supercapacitor, which delivers remarkable electrochemical performance in terms of exceptional capacitance reaching ~1374.7 C g −1 (specific capacitance of ~3054.9 F g −1 ) and ultra-long cycling longevity (a retention of ~91.7% after 10, 000 cycles at 5 A g −1 ). Furthermore, the assembled hybrid supercapacitor (HSC) device displays ultrahigh energy density of ~86 Wh kg −1 at a maximum power density of ~800 W kg −1 . The superior performance can be attributed to: (I) 3D hollow open nanostructures provide sufficient electroactive sites and ion-diffusion "short-cuts"; (II) The introduction of phosphorus can adjust the band structure and gain a small band gap; (III) Bimetals enhance rich redox reactions; (IV) Nitrogen doped carbon ensures high conductivity and charge storage kinetics. Graphical Abstract: ga1 Highlights: A 3D frame-like architecture of N-C-incorporated mixed metal phosphide was successfully constructed. A high capacity reaching ~1374.7 C g −1 (specific capacitance of ~3054.9 F g −1 ) at 1 A g −1 was obtained. The assembled HSC displayed ultrahigh energy density of ~86 Wh kg −1 at ~800 W kg −1 .