A negative active material for a lithium secondary battery includes a graphite-like carbon material having an intensity ratio II of an X-ray diffraction peak intensity I at a plane to an X-ray diffraction peak intensity I at a plane of less than 0. The cathode structure includes a continuous substrate, which provides a continuous base area, starting from which a plurality of crosspieces extends. The converted portion then serves as an anchor region for a spring structure deposited over the release layer. A spark discharge gap is formed between the noble metal tip and the ground electrode. The user can specify the level of DPI to be applied.