Korea Advanced Institute of Science and Technology

Korea Institute of Science and Technology

Ki-Young Lee

Ji-sang Yu

Jai-Young Lee

Dong-Myung Kim

Han-Ho Lee

Jae-Han Jung

Soo-Geun Lee

Seungwoo Lee

Hyunjung Yi

Sungwoong Kim

Provided is a pressure sensor including: a first layer having first conductivity and at least one conductive region; a second layer contacting the first layer to be disposed thereon and having second conductivity; and a plurality of terminals that are electrically connected with the second layer and spaced apart from the at least one conductive region, wherein the at least one conductive region has electrical conductivity that is greater than or equal to that of the second layer.

Pressure sensor comprising layer of discontinuous conductive patterns, device comprising the same, and apparatus and method for detecting pressure

The present invention provides a hydrogen-absorbing alloy system of ultra high capacity for electrode of secondary battery. In accordance with the present invention, the hydrogen-absorbing Ti alloy system is represented as a following general formula:

Hydrogen-absorbing alloy of ultra high capacity for electrode of

The present invention relates to a material for hydrogen-storage constituted by Ti-Mn alloy system which has a high hydrogen-storage capacity, plateau hydrogen dissociation equilibrium pressure, hypostoichiometric composition and crystal structure of C14. Ti-Mn alloy system for hydrogen-storage of the invention which has a C14 crystal structure, is represented as: Ti.sub.u Zr.sub.v Mn.sub.w Cr.sub.x V.sub.y X.sub.z, wherein, X is at least one of element selected from the group consisting of Fe, Al and Ni; u, v, w, x, y and z are mole numbers of each components; 0.7&lt;u&lt;1.0; 0&lt;v&lt;0.3; 1.0.ltoreq.w.ltoreq.1.3; 0.1.ltoreq.x.ltoreq.0.4; 0&lt;y&lt;0.3; 0.ltoreq.z.ltoreq.0.2; 0.7&lt;u+v&lt;1.0; 1.4.ltoreq.w+x.ltoreq.1.7; and, 1.3.ltoreq.w+x+y+z&lt;2.0.

Hydrogen-storage material employing ti-mn alloy system

The present invention provides a method of activation treatment of a Ni/MH secondary battery which comprises a step of immersing an electrode or battery in a solution or electrolyte and charging/discharging concurrently. In accordance with the activation treatment of a Ni/MH secondary battery by hot-charging method of the invention, the time required for activation treatment is remarkably saved and the activation process is carried out in a highly efficient manner, compared to the conventional methods of activation treatment.

Method of activation treatment of Ni/MH secondary battery by hot-charging

The present invention relates to a process for preparing an electrode for secondary battery employing hydrogen-storage alloy systems, more specifically, to a process for preparing an anode material for secondary battery which can be charged/discharged in an electrolyte and has a high discharge efficiency and energy density per unit weight, by sintering a mixture of hydrogen-storage alloy systems. An electrode for secondary battery of the present invention is prepared by the process which comprises the steps of: (i) mixing a hydrogen-storage alloy powder free of Ni with a hydrogen-storage alloy powder containing Ni over 30 atomic %; (ii) cold-pressing the mixed powder at a pressure of 5 to 15 ton/cm.sup.2 ; (iii) sintering the cold-pressed mixture in a quartz tube at 900.degree. C. for 5 to 15 min under a vacuum condition of 10.sup.-2 to 10.sup.-3 torr; and, (iv) quenching the sintered material.

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Seoul, South Korea

Ki-Young Lee