Abstract: A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes a cathode active material and a conductive material ID/IG is in a range from 0.5 to 1.25 in a Raman spectrum of the cathode active material layer. The cathode active material includes lithium metal oxide particles containing nickel and manganese and having a content of cobalt of less than 2 mol % among all elements except for lithium and oxygen.

Abstract: A lithium secondary battery includes a cathode, a separator, and an anode including an anode current collector and an anode active material layer formed on the anode current collector and facing the cathode with the separator interposed therebetween. The anode active material layer includes a first anode active material layer formed on the anode current collector and including a first anode active material and a first anode binder containing a styrene-butadiene-based rubber (SBR) binder and a second anode active material layer formed on the first anode active material layer and including a second anode active material and a second anode binder containing a acryl-based binder. Each of the first anode active material and the second anode active material includes a silicon-based active material and a graphite-based material and contains 2 to 9.5 parts by weight of silicon with respect to the 100 part by weight of the graphite-based active material.

Abstract: A light guide is provided. The light guide includes an optic formed along a length of the light guide. In particular, the optic diffuses light incident from a light source, and the optic is formed to gradually change from a first shape to a second shape as the optic gets farther from an incident portion.

Abstract: A light guide is provided. The light guide includes an optic formed along a length of the light guide. In particular, the optic diffuses light incident from a light source, and the optic is formed to gradually change from a first shape to a second shape as the optic gets farther from an incident portion.

Abstract: A connection terminal device and an electronic device having the same are provided. The connection terminal device includes a connection terminal device body, and a connection terminal connected to the connection terminal device body. The connection terminal device also has a front unit disposed on a front surface of the connection terminal device body, a rear unit disposed on a rear surface of the connection terminal device body, and a support disposed on the rear surface of the connection terminal device body. When force is applied to the connection terminal, supporting force is transferred to the rear unit of the connection terminal device body.