Patent ID: 8603268
Filing Date: 2013-12-10
Classification: C23C,H01M,Y02E,Y02P

Abstract:
1. A titanium material for a solid polymer fuel cell separator having a low contact resistance which has at its surface a surface layer structure in which a Ti compound containing either C or N is dispersed, said Ti compound being covered by titanium oxide, or metal Ti, or titanium oxide and metal Ti, said titanium material characterized in that, when analyzed from the titanium material surface by XPS (X-ray photoelectron spectroscopy), a Ti2p spectrum of TiO further, at a Ti2p spectral energy range of 454.2 eV to 455.1 eV of TiO, or a Ti2p spectral energy range of 453.7 eV to 453.9 eV of metal Ti, or a Ti2p spectral energy range of 454.2 eV to 455.1 eV of TiO and a Ti2p spectral energy range of 453.7 eV to 453.9 eV of metal Ti, a Ti2p spectrum of TiO, or a Ti2p spectrum of metal, or a Ti2p spectrum of TiO and a Ti2p spectrum of metal Ti having a Ti maximum detection peak height (c/s) of at least 3 times the standard deviations of the backgrounds (c/s) at the respective spectral energy ranges is detected, and at a C1s spectral energy range of 280 to 283 eV and N1s spectral energy range of 394 to 398 eV, a spectrum of C1s and a spectrum of N1s having a maximum detection peak height (c/s) of less than 3 times the standard deviations of the backgrounds (c/s) at the respective spectral energy ranges of C1s and N1s are detected, where the background (c/s) at each spectral energy range is measured by removing the surface layer part of said titanium material having that structure and exposing the titanium material at the base.