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Nickel sulfide cathode in combination with an ionic liquid-based electrolyte for rechargeable lithium batteries

journal contribution
posted on 2008-12-31, 00:00 authored by J Z Wang, S L Chou, S Y Chew, J Z Sun, Maria ForsythMaria Forsyth, D R MacFarlane, H K Liu
Nickel sulfides, pure Ni 3 S 2 and a mixture of Ni 7 S 6 -NiS, were synthesized through a solvothermal process. The nickel sulfide powders were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical testing. The results showed that the capacity of NiS-Ni 7 S 6 is much higher than that of Ni 3 S 2 , when used as the cathode in a lithium cell with an organic solvent-based electrolyte, l M lithium bis(trifluoromethanesulfonyl)amide (LiNTf 2 ) in poly(ethylene glycol) dimethyl ether 500. The NiS-Ni 7 S 6 electrodes were also tested with an ionic liquid electrolyte consisting of 1 M LiNTf 2 in N-methyl-N-propyl pyrrolidinium bis(trifluoromethanesulfonyl)amide ([C 3 mpyr][NTf 2 ]) to compare with organic-solvent based electrolytes. The results revealed that the ionic liquid is a useful solvent for use with this cathode material. © 2008 Elsevier B.V. All rights reserved.

History

Journal

Solid state ionics

Volume

179

Issue

40

Pagination

2379 - 2382

Publisher

Elsevier

ISSN

0167-2738

Publication classification

CN.1 Other journal article