Core-shell hetero-nanostructured 1D transition metal polyphosphates decorated 2D bimetallic layered double hydroxide for sustainable hybrid supercapacitor

Swati J. Patil, Nilesh R. Chodankar, Rahul B. Pujari, Young Kyu Han, Dong Weon Lee

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

In this work, a hierarchical 2D NiMn-layered double hydroxide (LDH) @1D transition metal polyphosphates (1D NiCoP2O7) nanostructure is rationally prepared for hybrid sustainable supercapacitor to overcome the limitation of the traditional carbon-based supercapacitor. Initially, the vertically aligned 1D NiCoP2O7 hexagonal microrods are prepared over 3D nickel foam and then it is decorated with 2D NiMn-LDH nanoflakes to form core-shell nanostructure. Benefiting from the micro-nano structure, 2D NiMn-LDH@NiCoP2O7- core-shell electrode exhibits excellent electrochemical features with reversible charge storage specific capacity of 662.95 mAh g−1 and excellent rate capability, which is quite suitable for the high-energy hybrid supercapacitor fabrication. The accumulated hybrid supercapacitor consisting of 2D NiMn-LDH@NiCoP2O7 and activated carbon achieves a high specific capacitance of 142.1 F g−1, delivers remarkable specific energy (56.15 Wh kg−1 at a specific power of 4210 W kg−1) and endured superior cyclic stability over 10000 cycles. Such remarkable results may provide a new perspective for the development of supercapacitive electrode from metal oxide materials.

Original languageEnglish
Article number228286
JournalJournal of Power Sources
Volume466
DOIs
StatePublished - 1 Aug 2020

Keywords

  • 1D polyphosphate
  • 2D NiMn-Layered double hydroxide
  • Hexagonal microrods
  • Nanoflakes

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