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Hybrid NiCo 2 O 4 ‐NiCo 2 S 4 Nanoflakes as High‐Performance Anode Materials for Lithium‐Ion Batteries
Author(s) -
Raj Shipra,
Dong Yifan,
Kar Pradip,
Mai Liqiang,
Jin Song,
Roy Poulomi
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702919
Subject(s) - spinel , anode , materials science , faraday efficiency , lithium (medication) , electrode , chemical engineering , chemistry , metallurgy , medicine , engineering , endocrinology
The hybrid electrode with the combination of NiCo 2 O 4 of inverse spinel structure and more conducting NiCo 2 S 4 of normal spinel structure has been developed for next generation Li‐ion batteries. The hybrid nanostructures with the accessibility of both NiCo 2 O 4 as well as NiCo 2 S 4 showed almost 2‐fold better performance compared to pristine NiCo 2 O 4 . Apart from the doubled performance for hybrid materials, a significant cycling stability with 91.6% coulombic efficiency was achieved over 200 cycles. Such a high storage performance for the hybrid materials can be attributed not only to their normal spinel/inverse spinel combination, but also to the binder‐free direct deposition of materials on to the conductive 3D open Ni‐frame resulting high electrical conductivity and easy ionic diffusion.