Investigation of electrochemical properties and performance of electrospun carbon nanofiber for rechargeable lithium-air Battery

초록

With increasing demand of power sources, lithium air battery has received considerable attention as a promising energy storage device owing to its high theoretical specific energy density. However, the main challenges are still remained, especially in the degradation of the electrodes derived from the accumulated discharge products on the electrode surface. In order to achieve high performance of electrode, development of an excellent porous air electrode is strongly required. [1] In this study, carbon nanofibers (CNFs) were synthesized by electrospinning with polyacrylonitrile(PAN) and carbonization, in an attempt to examine the influence of loading amount on the cyclability. The surface morphology was studied by scanning electron microscopy (SEM), and the surface area and pore size distribution was determined by Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) analysis, respectively. The electrochemical characterizations were carried out using Swagelok type cell in oxygen atmosphere. The results reported herein demonstrated that the CNF with low loading amount exhibited a long cyclability.