The NiO/graphene (NiO/G) composite nanofibers were successfully synthesized by simple electrospinning followed by heat treatment. They as anode materials for lithium ion batteries demonstrated the more outstanding electrochemical performance when compared with the NiO+Ni composite nanofibers as the reference. NiO/G exhibited a higher discharging/charging capacity (about 712 mAhg⁻¹ at the third cycle) with a coulombic efficiency of nearly 100% than NiO+Ni (547 mAhg⁻¹). NiO/G also demonstrated the excellent cycling stability due to its higher discharging capacity of 571 mAhg⁻¹ and retention rate of 78% than NiO+Ni (184 mAhg⁻¹ and 33%) when subject to 50 cycles at 100 mAg⁻¹. Moreover, its rate performance was also greatly improved when compared with NiO+Ni owing to its higher discharging capacity (305 mAhg⁻¹, 556 mAhg⁻¹) and retention rate (44%, 80%) at the current density increased from 100 mAg⁻¹ to 2000 mAg⁻¹, and then recovered to 100 mAg⁻¹. The outstanding electrochemical performance of the NiO/G electrode is closely related to its lower ohmic resistance (2.1 Ω)/charge transfer resistance (86.5 Ω), and stronger diffusion capability of Li⁺ resulting from the high specific surface area, excellent conductivity and a certain charge storage capacity of graphene.

通过简单的电纺丝并随后进行热处理，成功地合成了NiO /石墨烯（NiO / G）复合纳米纤维。与作为参考的NiO + Ni复合纳米纤维相比，它们作为锂离子电池的负极材料表现出更出色的电化学性能。NiO / G具有比NiO + Ni（547mAhg ^-1）高的放电/充电容量（第三循环约712mAhg ^-1），库伦效率接近100％。NiO / G还显示出优异的循环稳定性，这是因为在100 mAg ^-1下进行50次循环后，其放电容量为571 mAhg ^-1，比NiO + Ni（184 mAhg ^-1和33％）高，保留率为78％。。此外，它的速率性能也极大地当与氧化镍的Ni +相比，由于其较高的放电容量（mAhg 305提高^-1，556 mAhg ^-1处的电流密度），并保持率（44％，80％）从100增加MAG ^-1至2000 mAg ^-1，然后恢复至100 mAg ^-1。NiO / G电极出色的电化学性能与其较低的欧姆电阻（2.1Ω）/电荷转移电阻（86.5Ω）以及高比表面积，出色的电导率和高电导率导致的Li ⁺扩散能力密切相关。石墨烯具有一定的电荷储存能力。