Na4Fe3(PO4)2P2O7/C nanospheres as low-cost, high-performance cathode material for sodium-ion batteries

By Xiangjun Pu, Huiming Wang, Tianci Yuan, Shunan Cao, Shuang Liu, Li Xu, Hanxi Yang, Xinping Ai, Zhongxue Chen, Yuliang Cao. Energy Storage Materials, 2019

206 citations recorded by the source corpus.

Abstract Sodium-ion battery is regarded as a promising power source for large-scale energy storage systems. However, the development of sodium-ion batteries is hindered by the lack of applicable cathode materials with low cost and long cycle life. Here, we report a successful synthesis of Na4Fe3(PO4)2P2O7/C nanospheres with tunable particle size and carbon coating thickness by a template approach. The as-prepared Na4Fe3(PO4)2P2O7/C nanospheres deliver a high discharge capacity of 128.5 mAh g−1 (near to the theoretical capacity: 129 mAh g−1) at 0.2C, with capacity retention of 63.5% at 10 C after 4000 cycles. Particularly, a high reversible capacity of 79 mAh g−1 is exhibited at an ultrahigh current rate of 100 C (charge/discharge in 36s). The excellent performances result from the shortened Na+ ion diffusion length within the nanospheres (∼30 nm) and highly conductive pathways for electrons in the carbon coating layers (∼3 nm). Owing to their low cost, long lifespan and outstanding rate capability, we believe that the Na4Fe3(PO4)2P2O7/C nanospheres are considerable competitive to other cathode materials for application in stationary sodium-ion batteries.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/16b50b205d7f62966c13592e6c7a642a4981d5bb

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In Electrical and Electronic Engineering

  1. Federico E. Milano
  2. Rafael Zárate-Miñano
  3. Vijay Vittal
  4. G. Hou
  5. Gregor Verbic
  6. Marian Anghel
  7. Claudio A. Cañizares
  8. Steven H. Low

In Electronic, Optical and Magnetic Materials

  1. Federico E. Milano
  2. Umer Akram
  3. Mithulananthan Nadarajah
  4. Rakibuzzaman Shah

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