The development of effective synthetic routes is important to manifest proper nature of specific materials. In-situ electrochemical functionalization possesses great advantages over conventional routes, especially facile way and leading to reaching elaborate sites of functional group. Here, we demonstrate the preparation of functionalized carbons by in-situ electrochemical reduction in an argon atmosphere for application in low-cost, environmentally benign, and high-performance oxygen-electrodes for non-aqueous Li–O₂ batteries. A Li–O₂ battery with functionalized carbon shows a high discharge capacity (100 times that of pristine carbon), high power and cycling stability. The outstanding performance is attributed to the high O₂ affinity of the functionalized carbon surface that facilitates the formation of soluble and diffusible superoxide intermediates by the reduction of the remaining O₂ competing with surface growth for Li₂O₂ formation.

有效合成途径的发展对于证明特定材料的适当性质很重要。原位电化学官能化具有优于常规途径的巨大优势，尤其是简便的方法并导致到达官能团的精细位点。在这里，我们演示了在氩气气氛中通过原位电化学还原制备功能化碳的方法，这些化合物可用于低成本，对环境无害且高性能的非水Li–O ₂电池氧电极。具有功能化碳的Li–O ₂电池显示出高放电容量（是原始碳的100倍），高功率和循环稳定性。出色的性能归因于高O官能化碳表面的₂亲和力，通过减少剩余的O ₂与表面生长竞争形成Li ₂ O ₂来促进可溶性和可扩散超氧化物中间体的形成。