The key to solving pulverization and stripping from collector caused by volume expansion of high performance electrode lies in flexible electrode was prepared, which has excellent interface structure and electron/ion mass transfer capacity. A unique process has been used to prepare high performance transition metal oxide (nickel oxide) coupled carbon fiber mat flexible electrode. When directly applied such a flexible negative electrode for lithium-ion battery, due to the high theoretical specific capacitance of nickel oxide, unique low dimensional characteristics and huge draw ratios for internal stress dispersion of carbon fiber mat, NiO carbon nanofiber (NiO-CNF) deliver excellent cyclic characteristic and better rate electrochemical performance simultaneously much higher than NiO nanofiber (NiO NF) without carbon. NiO-CNF and NiO NF have reversible capacities of 418 mAh.g_-1 and 242 mAh.g_-1 after 200 cycles at 0.5C, respectively. These electrochemical properties can be attribute to the cross-linked structures provide diffusion kinetics and external stress buffering.