| abstract |
One aspect of the present invention is a non-aqueous electrolyte power storage device comprising: a positive electrode having a positive electrode compound material containing phosphorus atoms, and a nonaqueous electrolyte containing an imide salt, and X-ray photoelectron spectroscopy of the positive electrode compound material , the peak attributed to P2p exists at a position below 135 eV. Another aspect of the present invention is a method for producing a non-aqueous electrolyte power storage element using a positive electrode having a positive electrode compound paste using an oxo acid containing phosphorus and a non-aqueous electrolyte containing an imide salt. The produced positive electrode compound. |