‘Cotton-ball’ shaped porous iron-nickel sulfide: A high-rate cathode for long-life aqueous rechargeable battery

Atin Pramanik, Sandipan Maiti, Shreyasi Chattopadhyay, Goutam De, Sourindra Mahanty

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Aqueous rechargeable batteries (ARB) offer reasonably higher energy density and cycle life than their non-aqueous counterparts. Yet, the bottleneck is a limited choice of positive electrodes coupled with low-rate capability and inadequate cycle life. We report here a wet chemical approach to synthesize in-situ three-dimensional (3D) ‘cotton-ball’ shaped porous iron-nickel sulfide (FeNi2S4) (henceforth referred to as PINS) as a diffusion-controlled ARB electrode. It shows a high specific capacity of 177 mA h g−1 at 1 A g−1 vs Pt in the alkaline electrolyte with excellent rate capability (89 mA h g−1 at 40 A g−1) and ultra-long cycle life (10,000 cycles). Furthermore, a pouch-type full-cell ARB (FeNi2S4//AC) delivers an energy density of 56.7 Wh kg−1 at a power density of 871.5 W kg−1 with high cycling stability (10,000 cycles). The present study offers a straightforward and efficient approach for developing nanostructured transition metal sulfide-based cathode materials for practical ARB.

Original languageEnglish
Article number111307
JournalMaterials Research Bulletin
Volume140
DOIs
StatePublished - Aug 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • Aqueous rechargeable battery
  • Electrochemical energy storage
  • FeNiS
  • Hydrothermal synthesis
  • Ternary metal sulfide

Fingerprint

Dive into the research topics of '‘Cotton-ball’ shaped porous iron-nickel sulfide: A high-rate cathode for long-life aqueous rechargeable battery'. Together they form a unique fingerprint.

Cite this