Abstract: A composite anode active material including metal core particles and carbon nanotubes that are covalently bound to the metal core particles, an anode including the composite anode active material, a lithium battery employing the anode, and a method of preparing the composite anode active material.

Abstract: An anode active material for a lithium rechargeable battery, the anode active material including: a base material which is alloyable with lithium and a metal nitride disposed on the base material.

Abstract: An anode including a current collector; an anode active material layer disposed on the current collector, and a lithium-containing organic compound disposed on a surface of the anode active material layer

Abstract: An anode, a lithium battery including the anode, and a method of manufacturing the anode. The anode includes: an anode active material including a metal alloyable with lithium; and a metal-carbon composite conducting agent having a density of 3.0 grams per cubic centimeter or greater.

Abstract: An electrode active material, a method of preparing the electrode active material, an electrode including the electrode active material, and a lithium secondary battery including the electrode; the electrode active material comprising a core active material; and a coating layer formed on a surface of the core active material, wherein the coating layer comprises a composition including a compound represented by Formula 1 below and a carbonaceous material, or a first coating layer including a carbonaceous material and a second coating layer including the compound represented by Formula 1 below: LixMy(PO4)z,??Formula 1 where M is selected from the group consisting of alkali metal, alkaline earth metal, a group 13 element, a group 14 element, a transition metal, a rare earth element, and combinations thereof; 1?x?3, 0?y?3, and 1?z?3.

Abstract: A composite anode active material including metal core particles and carbon nanotubes that are covalently bound to the metal core particles, an anode including the composite anode active material, a lithium battery employing the anode, and a method of preparing the composite anode active material.

Abstract: A solid acid having a core of calixarene or calix resorcinarene. The solid acid is an ion conducting compound in which at least one of the hydroxyl groups is substituted by an organic group having a cation exchange group at a terminal end, a polymer electrolyte membrane including the same, and a fuel cell using the polymer electrolyte membrane. The polymer electrolyte membrane can provide low methanol crossover and high ionic conductivity. Accordingly, a fuel cell having high efficiency can be obtained by using the polymer electrolyte membrane.

Abstract: An Si/C composite includes carbon (C) dispersed in porous silicon (Si) particles. The Si/C composite may be used to form an anode active material to provide a lithium battery having a high capacity and excellent capacity retention.

Abstract: A composite anode active material including metal core particles and carbon nanotubes that are covalently bound to the metal core particles, an anode including the composite anode active material, a lithium battery employing the anode, and a method of preparing the composite anode active material.

Abstract: Provided are a porous anode active material, a method of preparing the same, and an anode and a lithium battery employing the same. The porous anode active material includes fine particles of metallic substance capable of forming a lithium alloy; a crystalline carboneous substance; and a porous carboneous material coating and attaching to the fine particles of metallic substance and the crystalline carboneous substance, the porous anode active material having pores exhibiting a bimodal size distribution with two pore diameter peaks as measured by a Barrett-Joyner-Halenda (BJH) pore size distribution from a nitrogen adsorption. The porous anode active material has the pores having a bimodal size distribution, and thus may efficiently remove a stress occurring due to a difference of expansion between a carboneous material and a metallic active material during charging and discharging.

Abstract: Provided is a composite for anode material, a method of manufacturing the composite for anode material, and a cathode and a lithium battery that includes the composite for anode material, and more particularly, to a composite for anode material that has a large charge and discharge capacity and a high capacity retention, a method of manufacturing the composite for anode material, and a cathode and a lithium battery that includes the composite for anode material. Also, the composite for anode material in which Si or Si and carbon are distributed in silicon oxide particles is provided.

Abstract: An Si/C composite includes carbon (C) dispersed in porous silicon (Si) particles. The Si/C composite may be used to form an anode active material to provide a lithium battery having a high capacity and excellent capacity retention.

Abstract: Silicon oxide based composite anode active materials including amorphous silicon oxides are provided. In one embodiment, the amorphous silicon oxide is represented by SiOx (where 0<x<2), has a binding energy of about 103 to about 106 eV, a silicon peak with a full width at half maximum (FWHM) ranging from about 1.6 to about 2.4 as measured by X-ray photoelectron spectrometry, and an atomic percentage of silicon greater than or equal to about 10 as calculated from an area of the silicon peak. The anode active material is a composite anode active material obtained by sintering hydrogen silsesquioxane (HSQ). Anodes and lithium batteries including the anode active material exhibit improved charge and discharge characteristics.

Abstract: A sulfonated copolymer including a crosslinking functional group and a fuel cell including a polymer composition of the same are provided. The sulfonated copolymer including a crosslinking functional group can remarkably reduce methanol crossover and maintain superior dimensional stability and ionic conductivity by reducing swelling.

Abstract: An electrode active material, a method of preparing the electrode active material, an electrode including the electrode active material, and a lithium secondary battery including the electrode; the electrode active material comprising a core active material; and a coating layer formed on a surface of the core active material, wherein the coating layer comprises a composition including a compound represented by Formula 1 below and a carbonaceous material, or a first coating layer including a carbonaceous material and a second coating layer including the compound represented by Formula 1 below: LixMy(PO4)z, ??Formula 1 where M is selected from the group consisting of alkali metal, alkaline earth metal, a group 13 element, a group 14 element, a transition metal, a rare earth element, and combinations thereof; 1?x?3, 0?y?3, and 1?z?3.

Abstract: An Si/C composite includes carbon (C) dispersed in porous silicon (Si) particles. The Si/C composite may be used to form an anode active material to provide a lithium battery having a high capacity and excellent capacity retention.

Abstract: A solid acid having a core of calixarene or calix resorcinarene. The solid acid is an ion conducting compound in which at least one of the hydroxyl groups is substituted by an organic group having a cation exchange group at a terminal end, a polymer electrolyte membrane including the same, and a fuel cell using the polymer electrolyte membrane. The polymer electrolyte membrane can provide low methanol crossover and high ionic conductivity. Accordingly, a fuel cell having high efficiency can be obtained by using the polymer electrolyte membrane.

Abstract: Provided are a dendrimer solid acid and a polymer electrolyte membrane using the same. The polymer electrolyte membrane includes a macromolecule of a dendrimer solid acid having ionically conductive terminal groups at the surface thereof and a minimum amount of ionically conductive terminal groups required for ionic conduction, thus suppressing swelling and allowing a uniform distribution of the dendrimer solid acid, thereby improving ionic conductivity. Since the number of ionically conductive terminal groups in the polymer electrolyte membrane is minimized and the polymer matrix in which swelling is suppressed is used, methanol crossover and difficulties of outflow due to a large volume may be reduced, and a macromolecule of the dendrimer solid acid having the ionically conductive terminal groups on the surface thereof is uniformly distributed. Accordingly, ionic conductivity is high and thus, the polymer electrolyte membrane shows good ionic conductivity even in non-humidified conditions.

Abstract: Provided are a porous anode active material, a method of preparing the same, and an anode and a lithium battery employing the same. The porous anode active material includes fine particles of metallic substance capable of forming a lithium alloy; a crystalline carboneous substance; and a porous carboneous material coating and attaching to the fine particles of metallic substance and the crystalline carboneous substance, the porous anode active material having pores exhibiting a bimodal size distribution with two pore diameter peaks as measured by a Barrett-Joyner-Halenda (BJH) pore size distribution from a nitrogen adsorption. The porous anode active material has the pores having a bimodal size distribution, and thus may efficiently remove a stress occurring due to a difference of expansion between a carboneous material and a metallic active material during charging and discharging.

Abstract: A polymer electrolyte membrane, a method of manufacturing the same, and a fuel cell including the polymer electrolyte membrane are provided, wherein the polymer electrolyte forms an interpenetrating polymer network (IPN) of a polymer by simple blending of a hydrophobic polyimide having a reactive terminal group and a hydrophilic aromatic polymer having ion conductivity. The polymer electrolyte membrane has reduced swelling properties due to highly dense crosslinking of polyimide through the reactive terminal group, shows high ion conductivity at low humidity, and has methanol crossover suppressing ability. Accordingly, a fuel cell with improved electric and mechanical properties can be provided.