Nickel phosphorus trisulfide: an electroactive material for medium-temperature lithium batteries

✍ Scribed by Ye.V. Kuz'minskii; B.M. Voronin; I.M. Petrushina; N.N. Redin; G.P. Prikhodko

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 452 KB
• Volume: 55
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(94)01932-l

✦ Synopsis

In the present work the electrochemical behaviour of the layered NIPS3 compound with reference to lithium has been studied at 200 °C in a cell which included an Li3Sn counter electrode and a molten LiSCN-KSCN eutectic mixture as the electrolyte. It has been found that electroreduction of nickel phosphorus trisulfide (NIPS3) proceeds in several stages at potentials from 2.7 to 1.8 V up to nearly a Li/Ni ratio of 7.5, then the products formed catalyse the electrolyte decomposition. It has been shown that the reversible behaviour of the NIPS3 electrode of a lithium battery is possible in carrying out charge/ discharge cycles within the 0~<Li/Ni~<3 range, which considerably exceeds the region of the existence of the intercalation phase LixNiPS3 (0 ~<x ~< 1.5).