Abstract: An active material for a battery includes an electrochemically reversibly oxidizable and reducible base material selected from the group consisting of a metal, a lithium-containing alloy, a sulfur-based compound, and a compound that can reversibly form a lithium-containing compound by a reaction with lithium ions and a surface-treatment layer formed on the base material and comprising a compound of the formula MXOk, wherein M is at least one element selected from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, X is an element that is capable of forming a double bond with oxygen, k is a numerical value in the range of 2 to 4.

Abstract: An active material for a battery includes an electrochemically reversibly oxidizable and reducible base material selected from the group consisting of a metal, a lithium-containing alloy, a sulfur-based compound, and a compound that can reversibly form a lithium-containing compound by a reaction with lithium ions and a surface-treatment layer formed on the base material and comprising a compound of the formula MXOk, wherein M is at least one element selected from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, X is an element that is capable of forming a double bond with oxygen, k is a numerical value in the range of 2 to 4.

Abstract: A process for preparing an active material for a battery includes the steps of preparing a coating liquid by adding a compound comprising an element X that is capable of forming a double bond with oxygen, and a compound comprising at least one from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, to water, adding a metal source to the coating liquid to surface-treat the metal source material, drying the surface-treated metal source material to prepare an active material precursor; mixing the active material precursor with a lithium source; and heat-treating the resultant mixture to produce an active material with a surface-treatment layer comprising the compound of the formula (1): MXOk??(1) wherein M is at least one selected from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element; X is an element that can

Abstract: An electrolyte for a lithium battery includes a non-aqueous organic solvent, a lithium salt, and an additive comprising a) a sulfone-based compound and b) a C3 to C30 organic peroxide or azo-based compound. The electrolyte may further include a poly(ester)(meth)acrylate or a polymer that is derived from a (polyester)polyol with at least three hydroxyl (—OH) groups, where a portion or all of the hydroxyl groups are substituted with a (meth)acrylic ester and the remaining hydroxyl groups that are not substituted with the (meth)acrylic ester are substituted with a group having no radical reactivity. The lithium battery comprising the electrolyte of the present invention has a significantly improved charge-discharge and cycle life characteristics, recovery capacity ratio at high temperature, and swelling inhibition properties.

Abstract: Methods of preparing capped metal nanocrystals are provided. One method includes reacting a metal nanocrystal precursor with a reducing agent in a solution having a platinum catalyst.

Abstract: Negative active materials including metal nanocrystal composites comprising metal nanocrystals having an average particle diameter of about 20 nm or less and a carbon coating layer are provided. The negative active material includes metal nanocrystals coated by a carbon layer, which decreases the absolute value of the change in volume during charge/discharge and decreases the formation of cracks in the negative active material resulting from a difference in the volume change rate during charge/discharge between metal and carbon. Therefore, high charge/discharge capacities and improved capacity retention capabilities can be obtained.

Abstract: Provided are an anode active material for a lithium secondary battery, a manufacturing method of the anode active material, and a lithium secondary battery using the anode active material. More particularly, an anode active material for a lithium secondary battery having a high capacity and an excellent cycle lifetime, a manufacturing method of the anode active material, and a lithium secondary battery using the anode active material are provided. In the anode active material, monomers are coated on a tin nanopowder. The anode active material has a higher capacity and a higher cycle lifetime than a conventional anode active material.

Abstract: An active material for a battery includes an electrochemically reversibly oxidizable and reducible base material selected from the group consisting of a metal, a lithium-containing alloy, a sulfur-based compound, and a compound that can reversibly form a lithium-containing compound by a reaction with lithium ions and a surface-treatment layer formed on the base material and comprising a compound of the formula MXOk, wherein M is at least one element selected from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, X is an element that is capable of forming a double bond with oxygen, k is a numerical value in the range of 2 to 4.

Abstract: An active material for a battery has a surface-treatment layer including a compound of the formula (1): MXOk??(1) wherein M is at least one element selected from an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, X is an element capable of forming a double bond with oxygen, and k is a numerical value in the range of 2 to 4.

Abstract: A positive active material for a rechargeable lithium battery is provided. The positive active material comprises a lithiated intercalation compound and a coating layer formed on the lithiated intercalation compound. The coating layer comprises a solid-solution compound and an oxide compound having at least two coating elements, the oxide compound represented by the following Formula 1: MpM?qOr??(1) wherein M and M? are not the same and are each independently at least one element selected from the group consisting of Zr, Al, Na, K, Mg, Ca, Sr, Ni, Co, Ti, Sn, Mn, Cr, Fe, and V; 0<p<1; 0<q<1; and 1<r?2, where r is determined based upon p and q. The solid-solution compound is prepared by reacting the lithiated intercalation compound with the oxide compound. The coating layer has a fracture toughness of at least 3.5 MPam1/2. A method of making the positive active material is also provided.

Abstract: An active material for a battery is provided with a coating layer based on a conductive agent, or a coating layer based on a mixture of a conductive agent, and a conductive polymeric dispersant.

Abstract: A lithium composite oxide (LiaNi(1-x-y)CoxMyO2, where M is at least one metal atom selected from the group consisting of Al, Ca, Mg and B, a=0.97˜1.05, x=0.1˜0.3, and y=0˜0.05), prepared by a method including the steps of: (a) coprecipitating a Ni—Co composite hydroxide by adding an aqueous ammonia solution as a complexing agent, and an alkaline solution as a pH-adjusting agent, to an aqueous mixed solution containing a cobalt salt and a nickel salt; (b) adding lithium hydroxide to the composite hydroxide and thermally treating the mixture at 280˜420° C.; and (c) thermally treating the resultant of the step (b) at 650˜750° C. The average particle diameter of the lithium composite oxide decreases, or the tap density thereof increases, depending on the coprecipitation time. When the lithium composite oxide is used as a positive electrode active material, a lithium ion secondary cell having a high capacity can be obtained.

Abstract: An electrolyte for a lithium battery includes a non-aqueous organic solvent, a lithium salt, and an additive comprising a) a sulfone-based compound and b) a C3 to C30 organic peroxide or azo-based compound. The electrolyte may further include a poly(ester)(meth)acrylate or a polymer that is derived from a (polyester)polyol with at least three hydroxyl (—OH) groups, where a portion or all of the hydroxyl groups are substituted with a (meth)acrylic ester and the remaining hydroxyl groups that are not substituted with the (meth)acrylic ester are substituted with a group having no radical reactivity. The lithium battery comprising the electrolyte of the present invention has a significantly improved charge-discharge and cycle life characteristics, recovery capacity ratio at high temperature, and swelling inhibition properties.

Abstract: A process for preparing an active material for a battery includes the steps of preparing a coating liquid by adding a compound comprising an element X that is capable of forming a double bond with oxygen, and a compound comprising at least one from the group consisting of an alkali metal, an alkaline earth metal, a group 13 element, a group 14 element, a transition metal, and a rare-earth element, to water, adding a metal source to the coating liquid to surface-treat the metal source material, drying the surface-treated metal source material to prepare an active material precursor; mixing the active material precursor with a lithium source; and heat-treating the resultant mixture to produce an active material with a surface-treatment layer comprising the compound of the formula (1):

Abstract: Disclosed is a positive active material of for a rechargeable lithium battery and a method of preparing the same. The positive active material is represented by formula 1: LixMn2-a-bCraMbO4+z  [formula 1] where x≧2; 0.25<a<2; 0<b≦0.3; z≧0; M is an alkali earth metal, a transition metal or a mixture thereof. The method includes the steps of dissolving a chromium salt, a manganese salt, and a metal salt(s) in a solvent to produce a solution; performing a first heat-treatment step on the obtained solution at 400 to 500° C. to produce a chromium manganese metal oxide; mixing the chromium manganese metal oxide with a lithium salt; and performing a second heat-treatment step at 600 to 800° C.

Abstract: A positive active material for a rechargeable lithium battery is provided. The positive active material comprises a lithiated intercalation compound and a coating layer formed on the lithiated intercalation compound.

Abstract: An active material for a battery has a surface-treatment layer including a compound of the formula (1):

Abstract: Disclosed is a positive active material for a rechargeable lithium battery and a method of preparing the same. The positive active material includes a LiCoO2 core and a metal selected from a group consisting of Al, Mg, Sn, Ca, Ti, Mn and mixtures thereof. The metal has a concentration gradient from a surface of the core to a center of the core. The method of preparing a positive active material for a rechargeable lithium battery includes the steps of dissolving a metal compound in alcohol to prepare a metal compound solution in a sol state, coating LiCoO2 with the metal compound solution in the sol state and sintering the coated LiCoO2 at 150 to 500° C.

Abstract: An active material for a battery is provided with a coating layer including either a conductive agent, or a coating layer having a mixture of a conductive agent, and a conductive polymeric dispersant.

Abstract: A hybrid polymer electrolyte includes a copolymer matrix of poly(vinyl chloride) and poly(vinylidene chloride) having a plurality of pores, and a solution of an alkali metal salt in an organic solvent entrained in the pores of the copolymer matrix. The pores of the copolymer matrix occupy 10 to 50 volume percent of the hybrid polymer electrolyte.