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AssigneeSony Corporation
InventorsAtsuo Omaru, Hideo Azuma, Yoshio Nishi
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An anode material composed mainly of a difficultly graphatizable carbon or coke (easily graphatizable coke) consisting essentially of carbon, phosphorus and oxygen, and containing phosphorus in an amount of 0.2 to 9.0 wt %, is disclosed. The anode material exhibits a peak in a .sup.31 P solid NMR spectrum in a range of .+-.100 ppm based on orthophosphoric acid, and a peak in a 2p orbital spectrum of a phosphorus atom in XPS of not more than 135 eV. The anode material is prepared by adding phosphoric acid or phosphorus oxides to an organic material or a carbonic material. A non-aqueous liquid electrolyte cell is produced from the above anode material, an Li-containing cathode and a liquid electrolyte.
An anode material comprising as its primary portion a coke compound obtained by adding phosphorous pentaoxide to a material selected from the group consisting of a carbonic material or an organic material heat-treated at a temperature not higher than 700.degree. C., wherein said coke compound consists essentially of carbon, phosphorus and oxygen, said coke compound containing phosphorous in an amount of 0.2 to 9.0 wt % and exhibiting a peak of a .sup.31 P solid NMR spectrum in a range of .+-.100 ppm based on orthophosphoric acid, said coke compound exhibiting a peak in a 2p orbital spectrum of phosphorous atom of not more than 135 eV in X-ray photoelectron spectroscopy for a carbon-carbon linkage energy in the 1s orbital spectrum of a carbon atom of 284.6 eV.
A method for producing an anode material mainly composed of a coke compound consisting essentially of carbon, phosphorous and oxygen, said method comprising the steps of:
A non-aqueous liquid electrolyte cell comprising:
Dependencies are inferred from the claim text.