Abstract: Disclosed is a positive active material for a lithium secondary battery. The positive active material includes a lithium molybdenum oxide having an X-ray diffraction (XRD) pattern with peaks at 11.5±2°, 21±2°, 38±2°, and 64±2° 2-theta (2?) and represented by Formula 1: LixMoO3, where 1<x?3. Also disclosed is a method of preparing the positive active material.

Abstract: A lithium secondary battery including lithium molybdate. The lithium molybdate is a composite including amorphous lithium molybdate as a minor component and crystalline lithium molybdate as a major component.

Abstract: An electrode, for a rechargeable lithium battery, including a current collector; an active material layer disposed on the current collector; and a coating layer disposed on the active material layer. The coating layer includes a lithium ion conductive polymer and an inorganic material represented by Formula 1: MwHxPyOz, wherein M is an element selected from the group consisting of an alkali metal, an alkaline-earth metal, a Group 13 element, a Group 14 element, a transition element, a rare earth element, and a combination thereof; and 1?w?4, 0?x?4, 1 ?y?7, and 2?z?30.

Abstract: A positive electrode for a rechargeable lithium battery including a net-type current collector and a positive active material layer formed on both sides of the current collector and also including a positive active material and a binder and having a thickness of about 150 ?m or more, a method of manufacturing the same, and a rechargeable lithium battery including the same.

Abstract: A positive electrode and a rechargeable lithium battery including the same, the positive electrode including a current collector and a positive active material layer disposed on the current collector. The positive active material layer includes a positive active material and a binder including an ion conductive polymer including a carboxylate group.

Abstract: A mobile terminal outputs text-to-speech (TTS) voice data. The mobile terminal displays text data including link data on a display unit of the mobile terminal, selects the link data, receives an original data of the link data as a background process, converts the original data to the TTS voice data, and outputs the TTS voice data though a voice outputting unit of the mobile terminal.

Abstract: A positive electrode including a current collector; a positive active material layer disposed on the current collector; and a coating layer disposed on the positive active material layer. The coating layer includes a binder and a inorganic additive. The binder is a poly(vinylidenefluoride-hexafluoropropylene) copolymer comprising 2 to 16 mole % of hexafluoropropylene. The positive electrode for a rechargeable lithium battery suppresses side-reactions between a positive electrode and an electrolyte, at a high voltage.

Abstract: Provided is a positive electrode for a lithium secondary battery including a positive active material and a conductive agent comprising a plurality of plate-structured carbon particles.

Abstract: Disclosed herein are a process for the refinement of nitrogen trifluoride gas and an adsorbent used therein. A nitrogen trifluoride (NF3) gas including carbon tetrafluoride (CF4) as an impurity is permeated into a bed of the zeolite 3 A, 4A or 5 A which is ion exchanged with alkali earth metal and is thermally treated at 150 to 600° C. for 0.5 to 100 hours so as to selectively adsorb nitrogen trifluoride onto the bed, followed by the desorption of the nitrogen trifluoride therefrom.

Abstract: An electrode for a rechargeable lithium battery and method of manufacturing a rechargeable lithium battery including the electrode is disclosed. In one embodiment, the electrode includes i) a current collector, ii) a first electrode composition layer provided on a surface of the current collector and iii) a second electrode composition layer farther than the first electrode composition layer from the current collector. Further, each of the first and second electrode composition layers comprises an active material and a conductive material, and wherein the amount of the conductive material of the first electrode composition layer is different from that of the conductive material of the second electrode composition layer.

Abstract: An audio codec system and an encoding method using the same are provided. According to the method, encoding and decoding processes are repeatedly performed so as to determine optimized coding parameters when analog audio signals being inputted are encoded. The processes of encoding and decoding inputted analog audio signals using initial coding parameters, and computing new parameters using a differential computed during the encoding process are repeatedly performed.

Abstract: Apparatus and method for reproducing a MIDI-based music file are provided. According to the apparatus and method, a plurality of notes and note reproduction times are extracted from the MIDI file, a section where envelope values of sound source samples exponentially reduce is changed into a linear section, and the sound source samples are outputted according to the note reproduction times by reflecting the slope of the linear section.

Abstract: Flame retardant electrolyte solutions for rechargeable lithium batteries and lithium batteries including the electrolyte solutions are provided. The flame retardant electrolyte solution includes a lithium salt, a linear carbonate-based solvent, at least one ammonium cation, a phosphoric acid-based solvent, and an additive including oxalatoborate.

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 negative active material for a rechargeable lithium battery, a method of preparing the negative active material, and a rechargeable lithium battery including the negative active material. The negative active material for a rechargeable lithium battery includes lithium titanium oxide (Li4Ti5O12) having a tap density of about 1.2 g/cc to 2.2 g/cc. The lithium titanium oxide is prepared by a mechano-chemical treatment and a heat treatment at a low temperature of about 650° C. to 775° C. According to the present invention, lithium titanium oxide having high crystallinity and tap density can be prepared through a simple and low-cost solid-phase method, e.g., a mechano-chemical treatment, and thus an electrode with excellent electrochemical reactivity and high energy density per volume can be fabricated.

Abstract: A rechargeable battery includes an electrode assembly that includes a positive electrode, a negative electrode, a first bipolar electrode between the negative electrode and the positive electrode, and a second bipolar electrode between an outer surface of the electrode assembly and the positive electrode or between a center of the electrode assembly and the negative electrode, wherein the positive electrode, the negative electrode, and the first and second bipolar electrodes are stacked and wound together, and a lead electrically coupled with the electrode assembly. The electrode assembly may include separators between the positive electrode, the negative electrode, and the first and second bipolar electrodes.

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 rechargeable battery includes an electrode assembly having positive and negative electrodes and a separator interposed between the positive and negative electrodes, a case for receiving the electrode assembly, and a plurality of projections formed on an outer surface of the case.

Abstract: Disclosed herein are a process for the refinement of nitrogen trifluoride gas and an adsorbent therefor. A nitrogen trifluoride (NF3) gas including carbon tetrafluoride (CF4) as an impurity is permeated into a bed of zeolite 3A, 4A or 5A which undergoes ion exchange and impregnation with alkali earth metal and is thermally treated at 150 to 600° C. for 0.5 to 100 hours so as to be able to selectively adsorb nitrogen trifluoride onto the bed, followed by the desorption of the nitrogen trifluoride therefrom.

Abstract: A rechargeable battery includes an electrode assembly having positive and negative electrodes and a separator interposed between the positive and negative electrodes, a case for receiving the electrode assembly, and a plurality of projections formed on an outer surface of the case.