Abstract:
The present invention provides a positive active material including a lithium-containing compound represented by the following Chemical Formula 1 and a rechargeable lithium battery including the positive active material. LiFe1-x-zMxM′zPyO4. Chemical Formula 1
Abstract:
Provided is a positive electrode for a rechargeable lithium battery including a positive active material including a lithium phosphate compound particle and fiber-type carbon attached inside the lithium phosphate compound particle, a method of preparing the same, and a rechargeable lithium battery including the same.
Abstract:
Disclosed is an electrical energy storage device provided with a metallic casing to receive a bare cell and first and second terminals located outside of the metallic casing corresponding to each electrode of the bare cell, including a plate-like member provided on at least one of the first and second terminals, an inner terminal contacting the plate-like member to form the boundary between the inner terminal and the plate-like member, and a laser welded portion formed along the boundary between the inner terminal and the plate-like member to connect the plate-like member with the inner terminal.
Abstract:
A positive active material for a rechargeable lithium battery including a compound represented by the following Chemical Formula 1: LixMyCozPO4 Chemical Formula 1 wherein 0≦x≦2, 0.98≦y≦1, 0
Abstract:
A lithium ion secondary battery is provided. The lithium ion secondary battery generally comprises an electrode assembly, a container for accommodating the electrode assembly; and an electrolyte. The electrode assembly comprises two electrodes having opposite polarities and a separator. The separator comprises a porous membrane comprising clusters of ceramic particles. The porous membrane is formed by bonding the particle clusters with a binder. Each particle cluster is formed either by sintering or by dissolving and re-crystallizing all or a portion of the ceramic particles. The ceramic particles comprise a ceramic material having a band gap. Each particle cluster may have the shape of a grape bunch or a lamina, and may be formed by laminating scale or flake shaped ceramic particles.
Abstract:
Disclosed are an electric energy storage device having a good cycle characteristic and a temperature characteristic and a method of charging and discharging the electric energy storage device. The electric energy storage device including a capacitor and a secondary battery combined in series is provided. When the capacitor of the electric energy storage device is an electric double layer capacitor, the capacitor is used to the voltage of OV or less to increase an available energy usage.
Abstract:
An electrolyte for the lithium rechargeable battery includes a non-aqueous organic solvent, lithium salts, vinylethylene carbonate and fluoroethylene carbonate. With this electrolyte, the ba0ttery life can be improved, and the storing property at a high temperature can be improved because the increasing rate of the battery thickness according to the increased internal pressure in the battery due to the gas generation is reduced when being kept at the high temperature, and the discharging property at a low temperature is improved because the discharge capacity can be increased when discharging at the low temperature.
Abstract:
A voice recorder pen includes a body including a power supply and a PCB and a pen tip portion coupled to one end of the body. The body includes a power supply and a PCB. The power supply includes a battery to supply power to the PCB. The PCB includes thereon a microphone for voice detection, a record on/off switch for turning a record function on/off, a microcomputer/memory unit for amplifying and converting voice detected by the microphone into a digital signal and storing the digital signal, and a connection portion adapted to be connected to an external operating unit. An operating clip is provided on an outer surface of the body. The operating clip is coupled to the record on/off switch to operate the record on/off switch. Accordingly, the configuration of the body is simplified, increasing the convenience of the use of the voice recorder pen, while reducing the body size.
Abstract:
Disclosed are an electric energy storage device having a good cycle characteristic and a temperature characteristic and a method of charging and discharging the electric energy storage device. The electric energy storage device including a capacitor and a secondary battery combined in series is provided. When the capacitor of the electric energy storage device is an electric double layer capacitor, the capacitor is used to the voltage of OV or less to increase an available energy usage. When this energy storage device is used as a power in a place where a rapid keeping and repairing is difficult such as out in the fields including in the mountain, at the sea, on the road, the cost for keeping and repairing can be largely reduced.
Abstract:
A method for managing multiples calls from multiple callers by receiving a flash message having call state information from a base station and displaying call state information to a user is disclosed. The method includes the steps of: a) connecting a first mobile terminal and a second mobile terminal as a first call connection; b) determining whether there is a request for a second call connection from a third mobile terminal; c) determining whether a call-selection button is activated and continuously maintaining the first call connection if the call connection button is not activated; d) at the first mobile terminal, receiving a flash message having call state information when the call-selection button of the first mobile terminal is activated; and e) at the first mobile terminal, providing information of mobile terminals currently connected to the first mobile terminal by analyzing the call state information and repeatedly performing the step c).