Studies of the transport properties in lithium-intercalated NiPS3

✍ Scribed by C. Julien; L. El-Farh; M. Balkanski; I. Samaras; S.I. Saikh

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 457 KB
• Volume: 14
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/0921-5107(92)90341-6

✦ Synopsis

We have investigated the electrochemical and transport properties of lithium-intercalated NIPS3. Thermodynamic and kinetic results have been obtained by the modified galvanostatic intermittent titration technique for the long-time regime in the compositional range 0 ~< x ~< 1.5. The chemical diffusion coefficient of lithium in LixNiPS 3 is composition dependent and the average value is 10 -9 cm 2 s-1 at room temperature. The partial ionic conductivity is estimated from the experimental determination of D* and W and a value of oite(Li) is 2 x 10 -3 fl-1 cm-1 at x = 1.0. These transport properties are compared with those obtained in a galvanic cell with a composite electrode, i.e. a mixture of active material, solid electrolyte, acetylene black and polytetrafluoroethylene. Electrochemical titration during the discharge under moderate current drain shows lower values for the transport properties in a medium which is out of equilibrium.