Abstract: The present disclosure relates to a solid electrolyte for a secondary battery which inhibits growth of lithium dendrite and is superior in cycle performance, a method for manufacturing the same, and a lithium secondary battery using the solid electrolyte. The solid electrolyte includes a polymer matrix, a lithium salt, a nitrile compound, and an additive ingredient, wherein the additive ingredient is at least one selected from a polymer or a copolymer polymerized from a monomer represented by the following Formula (1), and a polymer represented by the following Formula (2): where R1 is an olefin functional group having 2 to 6 carbon atoms; where R2 is a functional group having an ionic liquid structure such as —COOCH3, imidazole, pyrrole, piperidine, and a quaternary ammonium.

Abstract: A tube cutter includes a main body, a holder slidably mounted on the main body, a guide bolt rotatably mounted on the main body and locked onto a lower portion of the holder to drive and move the holder forward or backward by rotation of the guide bolt, and a driving handle removably mounted on the guide bolt to drive and rotate the guide bolt, and to enhance the torque of the tube cutter.

Abstract: A tube cutter includes a main body, a holder, a guide bolt and two rollers. The main body has a wall provided with a screw hole. The holder is slidably mounted on the main body and is provided with a through hole. A cutting wheel is rotatably mounted on the holder and corresponding between the two rollers. The guide bolt is screwed through the screw hole of the main body and extends through the through hole of the holder. The guide bolt has a first end provided with a rotation portion and a second end provided with a resting portion. An elastic member is mounted on the guide bolt and is biased between the resting portion and the holder. The two rollers are rotatably mounted on the main body.