Provided are a method of fabricating an anode for lithium-sulfur batteries and a lithium-sulfur battery. The method includes: mixing a carbon raw material and a binder; obtaining a carbon layer by preparing the mixture of the carbon raw material and the binder in the form of a layer; drying the carbon layer; forming a carbon thin layer by compressing the dried carbon layer; and stacking the carbon thin layer on an anode for lithium-sulfur batteries.

Provided are a method of fabricating an anode for lithium-sulfur batteries and a lithium-sulfur battery. The method includes: mixing a carbon raw material and a binder; obtaining a carbon layer by preparing the mixture of the carbon raw material and the binder in the form of a layer; drying the carbon layer; forming a carbon thin layer by compressing the dried carbon layer; and stacking the carbon thin layer on an anode for lithium-sulfur batteries.

A three-dimensional all-solid-state lithium ion batteries including a cathode protection layer, the battery including: a cathode including a plurality of plates which are vertically disposed on a cathode current collector; a cathode protection layer disposed on a surfaces of the cathode and the cathode current collector; a solid state electrolyte layer disposed on the cathode protection layer; an anode disposed on the solid state electrolyte layer; and an anode current collector disposed on the anode, wherein the cathode protection layer is between the cathode and the solid state electrolyte layer, and wherein the solid state electrolyte layer is between the cathode protection layer and the anode.

A three-dimensional all-solid-state lithium ion batteries including a cathode protection layer, the battery including: a cathode including a plurality of plates which are vertically disposed on a cathode current collector; a cathode protection layer disposed on a surfaces of the cathode and the cathode current collector; a solid state electrolyte layer disposed on the cathode protection layer; an anode disposed on the solid state electrolyte layer; and an anode current collector disposed on the anode, wherein the cathode protection layer is between the cathode and the solid state electrolyte layer, and wherein the solid state electrolyte layer is between the cathode protection layer and the anode.

The present invention relates to an electrode structure for a secondary battery comprising a potential sheath capable of suppressing a side reaction between an electrode and an electrolyte through electric potential control, and a method for manufacturing the same. The electrode structure for the secondary battery according to the present invention uses the electric potential control so that an unstable SEI layer, which causes decrease in cycle characteristic and capacity of an anode material, occurs only on the surface of a potential sheath without occurring on the surface of the anode active material, thereby being capable of completely solving the problems of the existing nanostructured electrode. The electrode structure of the present invention exhibits very excellent cycle performance that is difficult to predict from the conventional nanowire electrode structure by virtue of a synergistic effect of the potential sheath and the nanowire anode active material, and has an effect that is stable upon charging and discharging with high rate and can exert stable performance even if small cracks occur on the potential sheath.

The present invention relates to an electrode structure for a secondary battery comprising a potential sheath capable of suppressing a side reaction between an electrode and an electrolyte through electric potential control, and a method for manufacturing the same. The electrode structure for the secondary battery according to the present invention uses the electric potential control so that an unstable SEI layer, which causes decrease in cycle characteristic and capacity of an anode material, occurs only on the surface of a potential sheath without occurring on the surface of the anode active material, thereby being capable of completely solving the problems of the existing nanostructured electrode. The electrode structure of the present invention exhibits very excellent cycle performance that is difficult to predict from the conventional nanowire electrode structure by virtue of a synergistic effect of the potential sheath and the nanowire anode active material, and has an effect that is stable upon charging and discharging with high rate and can exert stable performance even if small cracks occur on the potential sheath.

A method to prepare an electrode active material of formula (1) for a secondary battery, comprising: preparing carbon coated particles of a lithium metal phosphate composite of formula (1):

LiFe.sub.1−xM.sub.xPO.sub.4   (1)

wherein x is a number from 0 to 1, inclusive, M is at least one metallic element selected from the group consisting of Mn, Co, Ni and V; preparing a first active material of the carbon coated particles of formula (1) comprising secondary particles of a coated. primary particle of the composite material of formula (1), where a surface of the primary particle is coated with conductive carbon and an average particle diameter of the coated primary particle is from 50 to 300 nm, and an average particle diameter of the secondary particle is from 300 nm to 3 μm; and granulating secondary particles of a carbon-coated primary particle of the composite material of formula (1), or uncoated primary particles of the composite material of formula (1) and a precursor of conductive carbon, to prepare a second active material of spherical granulated particles, wherein an average particle diameter of the primary particle is from 50 to 300 nm and an average particle diameter of the granulated particle is from 8 to 30 μm; wherein the secondary particle of the first active material is prepared without undergoing a grinding operation of a force that would result in a D50 particle size of the secondary particle being reduced by at least one half.

A nanocomposite is provided. The nanocomposite includes an electrically conductive nanostructured material; and metal fluoride nanostructures having the general formula M.sup.(I).sub.xM.sup.(II).sub.1−xF.sub.2+y−zn arranged on the electrically conductive nanostructured material, wherein M.sup.(I) and M.sup.(II) are independently transition metals, n is a stoichiometric coefficient, and wherein i) x=0, 0<y≦2, and z=0; or ii) 0<x<1, 0≦y≦2, z≧0, and M.sup.(I) and M.sup.(II) are different transition metals. An electrode including the nanocomposite and method of preparing the nanocomposite are also provided.

A nanocomposite is provided. The nanocomposite includes an electrically conductive nanostructured material; and metal fluoride nanostructures having the general formula M.sup.(I).sub.xM.sup.(II).sub.1−xF.sub.2+y−zn arranged on the electrically conductive nanostructured material, wherein M.sup.(I) and M.sup.(II) are independently transition metals, n is a stoichiometric coefficient, and wherein i) x=0, 0<y≦2, and z=0; or ii) 0<x<1, 0≦y≦2, z≧0, and M.sup.(I) and M.sup.(II) are different transition metals. An electrode including the nanocomposite and method of preparing the nanocomposite are also provided.

A predoping material is used for an alkali metal ion electric storage device and is represented by Formula (1):
RSM)n  (1)
where M represents lithium or sodium; n represents an integer of 2 to 6; and R represents an aliphatic hydrocarbon, optionally substituted aromatic hydrocarbon, or optionally substituted heterocycle having 1 to 10 carbon atoms).