Abstract: A positive electrode material for a lithium secondary battery has improved electron conductivity and surface stability because oxidation-treated carbon nanotubes are stably attached to the surface of an active material. According to one embodiment the positive electrode material includes a positive electrode active material core made of a Li—Ni—Co—Mn-M-O-based material (M=transition metal) and an oxidized carbon nanotube coating layer formed on the surface of the positive electrode active material core and including 1% to 3% by weight of oxidation-treated carbon nanotubes (OCNT) relative to 100% by weight of the positive electrode active material core.

Abstract: A positive electrode material for a lithium secondary battery and a manufacturing method therefor are provided. The positive electrode material may have carbon nanotubes stably attached to a surface of an active material and may exhibit increased electron conductivity and improved surface stability. The positive electrode material for a lithium secondary battery may comprises: a positive electrode active material core comprising a Li—Ni—Co—Mn-M-O-based material, where M is a transition metal; and a carbon nanotube coating layer on a surface of the positive electrode active material core. Carbon nanotubes (CNT) may be in an amount of 1-5 wt %, based on 100 wt % of the positive electrode active material core.

Abstract: In an ear tip and a method of manufacturing the same, the ear tip includes a sound transfer part including a hollow shaft and an external sheet and an acoustic absorbent making contact with the external sheet and the hollow shaft. The hollow shaft has a cylindrical shape of which a circumferential surface is flat and provides a sound conduit for transferring audio signals. The external sheet is extended from an end portion of the hollow shaft in such a way that the hollow shaft is enclosed with the external sheet and a gap space is provided between the external sheet and the hollow shaft. The acoustic absorbent is positioned in the gap space and has a plurality of pores, thereby absorbing surrounding noises and preventing the surrounding noises from transferring into user's ear.

Abstract: In an ear tip and a method of manufacturing the same, the ear tip includes a sound transfer part including a hollow shaft and an external sheet and an acoustic absorbent making contact with the external sheet and the hollow shaft. The hollow shaft has a cylindrical shape of which a circumferential surface is flat and provides a sound conduit for transferring audio signals. The external sheet is extended from an end portion of the hollow shaft in such a way that the hollow shaft is enclosed with the external sheet and a gap space is provided between the external sheet and the hollow shaft. The acoustic absorbent is positioned in the gap space and has a plurality of pores, thereby absorbing surrounding noises and preventing the surrounding noises from transferring into user's ear.

Abstract: In an ear tip and an ear phone including the same, the ear tip includes a cylindrical hollow shaft having a sound conduit through which audio signals are transferred into a user's ear, an external sheet extending from an end portion of the hollow shaft and enclosing the hollow shaft such that a gap space is provided between the hollow shaft and the external sheet, and a reinforce member protruded from the external sheet toward the hollow shaft in the gap space and reinforcing a strength of the external sheet to thereby resist against an axial external force applied along the hollow shaft. Accordingly, the external sheet is prevented from being turned inside out by the axial external force.