Properties of amorphous nickel hexathiodiphosphate, Ni2P2S6

✍ Scribed by E. Prouzet; G. Ouvrard; R. Brec

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 391 KB
• Volume: 26
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(89)80141-7

✦ Synopsis

Transition metal thiophosphates can be prepared through "soft chemistry" reactions leading to amorphous phases. From nickel nitrate and lithium thiophosphate in aqueous solutions, a-NW& can be obtained. Because of its highly divided structure, this amorphous material readily reacts with atmospheric moisture, and it must be handled in neutral atmosphere. Open circuit voltage curves of the Lila-and c-Nips3 have been studied. The amorphous phase shows a higher voltage and a lower polarization. A continuous decrease of the potential in the case of a-Nip& is consistent with the absence of microdomains of reduced and unreduced nickel, as was shown to be the case for c-Nips,.