Electrospinning Synthesis of Porous NiCoO 2 Nanofibers as High‐Performance Anode for Lithium‐Ion Batteries

• Published in: Particle & particle systems characterization 2019-07, Vol.36 (7)
• Main Authors: Wang, Jinkai, Xie, Sanmu, Li, Li, Li, Zhihui, Asiri, Abdullah M., Marwani, Hadi M., Han, Xiaogang, Wang, Hongkang
• Format: Article
• Language: English
• ISSN: 0934-0866; 1521-4117
• DOI: 10.1002/ppsc.201900109

Nanostructured ternary/mixed transition metal oxides have attracted considerable attentions because of their high‐capacity and high‐rate capability in the electrochemical energy storage applications, but facile large‐scale fabrication with desired nanostructures still remains a great challenge. To overcome this, a facile synthesis of porous NiCoO 2 nanofibers composed of interconnected nanoparticles via an electrospinning–annealing strategy is reported herein. When examined as anode materials for lithium‐ion batteries, the as‐prepared porous NiCoO 2 nanofibers demonstrate superior lithium storage properties, delivering a high discharge capacity of 945 mA h g −1 after 140 cycles at 100 mA g −1 and a high rate capacity of 523 mA h g −1 at 2000 mA g −1 . This excellent electrochemical performance could be ascribed to the novel hierarchical nanoparticle‐nanofiber assembly structure, which can not only buffer the volumetric changes upon lithiation/delithiation processes but also provide enlarged surface sites for lithium storage and facilitate the charge/electrolyte diffusion. Notably, a facile synthetic strategy for fabrication of ternary/mixed metal oxides with 1D nanostructures, which is promising for energy‐related applications, is provided.