Abstract: A polymer electrolyte has improved leakage resistance and a lithium battery uses the polymer electrolyte. The polymer electrolyte includes a polymerization product of a polymer electrolyte forming composition that includes a multi-functional acrylate based compound, at least one selected from the group consisting of polyalkylene glycol di(meth)acrylates and polyalkylene glycol (meth)acrylates, and an electrolytic solution containing a lithium salt and an organic solvent.

Abstract: A solid polymer electrolyte, a lithium battery employing the same, and methods of forming the electrolyte and the lithium battery. The polymer electrolyte includes polyester (meth)acrylate having a polyester polyol moiety having three or more hydroxide (—OH) groups, at least one hydroxde group being substituted by a (meth)acrylic ester group and at least one hydroxide group being substituted by a radical non-reactive group, or its polymer, a peroxide having 6 to 40 carbon atoms, and an electrolytic solution including a lithium salt and an organic solvent.

Abstract: A handoff system and method between different kinds of devices, an SIP server and an application method of the SIP server applied thereto. The handoff system between different kinds of devices includes a plurality of devices; a SIP server which requests a routing path update when a handoff request signal is input from a source device among the plurality devices, and getting a target device to participate in a current session; and a gateway which updates a predetermined routing path when a request signal for the routing path update is input, and transmitting data to the source device and the target device via the updated routing path.

Abstract: Disclosed are a handoff system and a method among heterogeneous networks. The handoff system among heterogeneous networks has plural access nodes which supports wireless communication with a mobile terminal; and a crossover node which selects resources of an access node to which a handoff is made without repetitive communications between access modes and the mobile terminal in selecting an access node. The handoff system performs a handoff to a network if resources of the network are sufficient for wireless communication.

Abstract: In wireless Internet, a resource reservation path is established between a CH and a MH through an initial BS located in an initial cell where the MH is currently located. Pseudo reservation paths (PRPs) are established between the initial BS and its neighboring BSs, one PRP being established between the current BS and each of the neighboring BSs. Once the MH moves into one of the neighboring cells of the initial cell, a PRP established for a neighbor BS is activated. The activated PRP is concatenated with the established resource reservation path through the initial BS and the neighbor BS, thereby establishing an optimized resource reservation path.

Abstract: A polymer electrolyte is formed by curing a composition prepared by mixing a polymer of compounds of polyethylene glycol di(meth)acrylates and/or multi-functional ethyleneoxides; one selected from a vinylacetate monomer, a (meth)acryalte monomer, and a mixture of a vinylacetate monomer and a (meth)acrylate monomer; and an electrolytic solution containing a lithium salt and an organic solvent.

Abstract: A polymer electrolyte for use in a lithium secondary battery prepared by polymerizing a composition including 0.1 to 90% by weight of a first compound represented by formula 1, a second compound represented by formula 2 or a mixture thereof, 0.1 to 90% by weight of a third compound represented by formula 3, and 9.8 to 99.8% by weight of a nonaqueous organic solvent containing 0.5 to 2.0 M of a lithium salt. Formula 1 is CH(R1)═C(R2)—C(═O)O—R3-N(R4)(R5), Formula 2 is CH(R1)═C(R2)—C(═O)O—R3-CN, and Formula 3 is Z—{—Y—X—C(R2)═CH(R1)}n.

Abstract: A lithium negative electrode for a lithium battery have good cycle life and capacity characteristics. The lithium negative electrode comprises a lithium metal layer and a protective layer present on the lithium metal layer, where the protective layer includes an organosulfur compound. An organosulfur compound having a thiol terminal group is preferred since such a compound can form a complex with lithium metal to enable coating to be carried out easily. The organosulfur compound has a large number of S or N elements having high electronegativity to form a complex with lithium ions, so it renders lithium ions to be deposited relatively evenly on the lithium metal surface, reducing dendrite formation.

Abstract: Disclosed is a polymer electrolyte for a lithium sulfur battery. The electrolyte includes a monomer with a methacrylate group, an initiator, an organic solvent, and a lithium salt.

Abstract: A lithium secondary battery of the present invention comprises a positive electrode; a negative electrode; a separator interposed between the positive and negative electrodes; and an electrolyte on the separator, wherein the electrolyte includes a non-aqueous organic solvent, a lithium salt, and a linear polymer having P═O bonds. The electrolyte improves the swelling characteristics of lithium secondary batteries. A lithium secondary battery with the electrolyte and a method for preparing the electrolyte and battery is described.

Abstract: A polymer electrolyte has improved leakage resistance and a lithium battery uses the polymer electrolyte. The polymer electrolyte includes a polymerization product of a polymer electrolyte forming composition that includes a multi-functional acrylate based compound, at least one selected from the group consisting of polyalkylene glycol di(meth)acrylates and polyalkylene glycol (meth)acrylates, and an electrolytic solution containing a lithium salt and an organic solvent.

Abstract: A solid polymer electrolyte, a lithium battery employing the same, and methods of forming the electrolyte and the lithium battery. The polymer electrolyte includes polyester (meth)acrylate having a polyester polyol moiety having three or more hydroxide (—OH) groups, at least one hydroxde group being substituted by a (meth)acrylic ester group and at least one hydroxide group being substituted by a radical non-reactive group, or its polymer, a peroxide having 6 to 40 carbon atoms, and an electrolytic solution including a lithium salt and an organic solvent.

Abstract: A polymer electrolyte is formed by curing a composition prepared by mixing a polymer of compounds of polyethylene glycol di(meth)acrylates and/or multi-functional ethyleneoxides; one selected from a vinylacetate monomer, a (meth)acryalte monomer, and a mixture of a vinylacetate monomer and a (meth)acrylate monomer; and an electrolytic solution containing a lithium salt and an organic solvent.

Abstract: A polymer electrolyte for use in a lithium secondary battery prepared by polymerizing a composition including 0.1 to 90% by weight of a first compound represented by formula 1, a second compound represented by formula 2 or a mixture thereof, 0.1 to 90% by weight of a third compound represented by formula 3, and 9.8 to 99.8% by weight of a nonaqueous organic solvent containing 0.5 to 2.0 M of a lithium salt. Formula 1 is CH(R1)═C(R2)—C(═O)O—R3—N(R4)(R5), Formula 2 is CH(R1)═C(R2)—C(═O)O—R3—CN, and Formula 3 is Z—{—Y—X—C(R2)═CH(R1)}n.

Abstract: In wireless Internet, a resource reservation path is established between a CH and a MH through an initial BS located in an initial cell where the MH is currently located. Pseudo reservation paths (PRPs) are established between the initial BS and its neighboring BSs, one PRP being established between the current BS and each of the neighboring BSs. Once the MH moves into one of the neighboring cells of the initial cell, a PRP established for a neighbor BS is activated. The activated PRP is concatenated with the established resource reservation path through the initial BS and the neighbor BS, thereby establishing an optimized resource reservation path.