In situ synthesis of porous LiNi0.5Co0.2Mn0.3O2 tubular-fiber as high-performance cathode materials for Li-ion batteries

摘要

Hollow structural materials exhibit strong advantages for application in electrode materials. Herein, we report an in situ synthesis of hollow tubular-fiber LiNi0.5Co0.2Mn0.3O2 (HFNCM523) prepared via electrospinning combined with calcination. The features of this material were provided with fiber-interconnected 3D network structure, hollow tubular structure, and multi-scale particle gaps, which are evenly distributed on the fiber's surface. The multiple synergistic effects of these advantages result in the remarkably excellent electrochemical performance of the tubular-fiber structures with a high specific capability of 191.2 mAh g(-1) at 0.1 C and 84% high rate capacity retention after 100 cycles at 1 C. In particular, the LiNi0.5Co0.2Mn0.3O2 hollow tubular-fiber structure was well maintained after 100 cycles.