Non-aqueous electrolyte cell and solid electrolyte cell
AssigneeSony Corporation
InventorsKimio Takahashi, Mamoru Hosoya, Masami Miyake
Life of this patent
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Abstract
A cell which is not deteriorated in cell characteristics and which maintains a cell shape encapsulated in a laminate film even when overdischarged to a cell voltage of 0V. The cell includes a cathode containing a compound having the formula LixFe1-yMyPO4, where M is at least one selected from the group consisting of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B and Nb, with 0.05≦x≦1.2 and 0≦y≦0.8, an anode and a solid electrolyte. An electrode member 1 comprised of the cathode and the anode, layered together with the interposition of a solid electrolyte, is encapsulated in a laminate film 2.
Claims17
A non-aqueous electrolyte cell comprising:
- a cathode material having a cathode current collector on which is deposited a cathode active material formed of a compound of an olivinic crystal structure having the formula LixFe1-yMyPO4, where M is at least one selected from the group consisting of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B and Nb, with 0.05≦x≦1.2 and 0≦y≦0.8, said compound being used alone or in combination with other materials;
- an anode material having an anode current collector on which is deposited an anode active material;
- a separator for separating said cathode material and said anode material from each other;
- and
- a non-aqueous electrolyte solution;
- said cathode and anode materials being layered and wound together, with the interposition of said separator, so that said anode and cathode materials are disposed towards an outer periphery and towards an outer periphery, respectively, to form a cell device, which is encapsulated in an exterior material;
- wherein
- a current collector exposing portion is provided by collector exposure on a surface facing said exterior material of said cathode material positioned on the radially outermost portion of said cell device or on the surfaces of the facing portions of the anode material lying on the radially innermost portions of said cell device.
5 The non-aqueous electrolyte cell according to claim 3 wherein the carbon material of said LiFePO4 carbon composite material has a strength to area ratio of a diffraction line appearing at the number of waves of 1570 to 1590 cm−1 (G peak) to a diffraction line appearing at the number of waves of 1340 to 1360 cm−1 (D peal) of the Raman spectrum in Raman spectrometry, or A(D/G), equal to 0.3 or higher.
A solid electrolyte cell comprising:
- a cathode material having a cathode current collector on which is deposited a cathode active material formed of a compound of an olivinic crystal structure having the formula LixFe1-yMyPO4, where M is at least one selected from the group consisting of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B and Nb, with 0.05≦x>1.2 and 0≦y≦0.8, said compound being used alone or in combination with other materials;
- an anode material having an anode current collector on which is deposited an anode active material;
- and
- a solid electrolyte;
- said cathode and anode materials being layered and coiled together so that said anode and cathode materials are disposed towards an inner periphery and towards an outer periphery, respectively, to form a cell device, which is encapsulated in an exterior material;
- wherein
- a current collector exposing portion is provided by collector exposure on a surface facing said exterior material of said cathode material positioned on the radially outermost portion of said cell device or on the surfaces of the facing portions of the anode material lying on the radially innermost portions of said cell device.
Dependencies are inferred from the claim text.