RIS ID

106681

Publication Details

Wang, N., Gao, Y., Wang, Y., Liu, K., Lai, W., Hu, Y., Zhao, Y., Chou, S. & Jiang, L. (2016). Nanoengineering to achieve high sodium storage: A case study of carbon coated hierarchical nanoporous TiO2 microfibers. Advanced Science, 3 (8), 1600013-1-1600013-7.

Abstract

Nanoengineering of electrode materials can directly facilitate sodium ion accessibility and transport, thus enhancing electrochemical performance in sodium ion batteries. Here, highly sodium-accessible carbon coated nanoporous TiO2 microfibers have been synthesised via the facile electrospinning technique which can deliver an enhanced capacity of ≈167 mAh g−1 after 450 cycles at current density of 50 mA g−1 and retain a capacity of ≈71 mAh g−1 at the high current rate of 1 A g−1. With the benefits of their porous structure, thin TiO2 inner walls, and the introduction of conductive carbon, the nanoporous TiO2/C microfibers exhibit high ion accessibility, fast Na ion transport, and fast electron transport, thereby leading to the excellent Na-storage properties presented here. Nanostructuring is proven to be a fruitful strategy that can alleviate the reliance on materials' intrinsic nature; and the electrospinning technique is versatile and cost-effective for the fabrication of such an effective nanoporous microfiber structure.

Grant Number

ARC/LE0882613, ARC/LE0237478, ARC/LP120200432

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/advs.201600013