Lg Energy Solution, Ltd.

Electronics and Telecommunications Research Institute

Korea Telecom

Jae Wook Lee

Hee Won Choi

Je Young Kim

Eun Kyung Kim

Seung Youn Choi

Min Soo Kim

Woo Young Choi

Bong Tae Kim

Bhum Cheol Lee

Tae Sik Cheung

A negative electrode active material for a lithium secondary battery which includes first negative electrode active material particles including artificial graphite particles and a carbon coating layer formed on the artificial graphite particle; and second negative electrode active material particles including natural graphite particles, wherein the first negative electrode active material particles have a larger average particle diameter (D) than an average particle diameter (D) of the second negative electrode active material particles, and a weight ratio of the first negative electrode active material particles and the second negative electrode active material particles is in a range of 70:30 to 95:5.

Negative electrode active material for lithium secondary battery, and negative electrode for lithium secondary battery and lithium secondary battery including the same

A negative electrode active material which includes a core including artificial graphite, and a carbon coating layer disposed on the surface of the core, wherein an edge plane of the negative electrode active material has a specific surface area of 1.0 m/g to 1.9 m/g, a negative electrode including the same, and a secondary battery including the negative electrode.

Negative electrode active material, method of preparing the negative electrode active material, negative electrode, and secondary battery including the negative electrode

A negative electrode active material for a lithium secondary battery, including: first negative electrode active material particles including first artificial graphite particles and a carbon coating layer on a surface of the first artificial graphite particles, wherein the carbon coating layer comprises hard carbon; and second negative electrode active material particles including second artificial graphite particles, wherein a difference between an average particle diameter Dof the first negative electrode active material particles and an average particle diameter Dof the second negative electrode active material particles is 5 &#x3bc;m or less, and a temperature at an exothermic peak in differential thermogravimetric analysis of the carbon coating layer is in a range of 580&#xb0; C. to 690&#xb0; C.

Negative electrode active material for lithium secondary battery, method of preparing the same, and negative electrode for lithium secondary battery and lithium secondary battery including the same

A negative electrode active material for a lithium secondary battery, a negative electrode including the same, and a lithium secondary battery including the negative electrode. Specifically, the present invention relates to a negative electrode active material capable of minimizing changes in a structure and internal total pore volume of an electrode during rolling of the electrode by controlling the type and amount of carbon coated on a surface of an artificial graphite active material, a negative electrode including the same, and a lithium secondary battery including the negative electrode.

Negative electrode active material for lithium secondary battery and negative electrode for lithium secondary battery including the same

Provided are a data transceiver and method for performing equalization and pre-emphasis adaptive to the transmission characteristic of a transmitting part. The transceiver measures the signal attenuation characteristic of a transmission line of a receiving part using an input data signal input via the transmission line of the receiving part, decodes the distorted waveform of the input data signal, distorts the waveform of an output data signal beforehand using the measured signal attenuation characteristic of the transmission line of the receiving part, and transmits the output data signal via a transmission line of a transmitting part. Thus, when the output data signal is transmitted via the transmission line of the transmitting part, the waveform of the signal remains optimized.

Data transceiver and method for transceiving data performing equalization and pre-emphasis adaptive to transmission characteristics of receiving part

Disclosed herein is a keypad assembly with supplementary buttons and method for operating the same. The keypad assembly with supplementary buttons is in a small-sized mobile communication terminal including input buttons for representing a plurality of characters and a plurality of function buttons. The keypad assembly has at least one mode switching button, at least one selection-indication button, and a control unit. The mode switching button is formed on a side of the terminal for switching an input mode for inputting different characters. The selection-indication button is formed on a side of the terminal for selecting and indicating one of a plurality of characters assigned to each input button. The control unit selects and inputs a specific character assigned to each input button by pressing the input buttons and the selection-indication button so as to select a specific input mode by pressing the mode switching button and select and input one of a plurality of characters assigned to a specific input button under the selected input mode. The control unit displays the selected and inputted data on a display window of the terminal and stores the data.

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Daejeon, South Korea

Jae Wook Lee