A Lithium-Ion Rechargeable Full Cell Using the Flower-like Na3V2(PO4)3@C Cathode and Li4Ti5O12Anode

Mainul Akhtar, Sunil Kumar Pradhan, Jeng Kuei Chang, Subhasish Basu Majumder

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In the present work, we have demonstrated that nanopetal-assembled hierarchical carbon-coated Na3V2(PO4)3 (nNVP@C) microflowers, synthesized via a microwave-assisted hydrothermal route, play an important role for yielding superior electrochemical characteristics of a Li4Ti5O12 (LTO)//nNVP@C full cell. Thus, the full cell yields superior power density with decent discharge capacity after extended cycling and good rate performance. The nanosize petals help Li+ to diffuse faster in NVP particles, and the inner mesoporous morphology of microflowers allows the electrolyte to easily penetrate into the embedded NVP@C nanocrystals. Furthermore, the homogeneous carbon coating provides an elastic buffer to mitigate the strain developed during Na+ extraction and subsequent Li+ insertion and extraction. The LTO//nNVP@C full cell is claimed to be suitable for power applications, where relatively thinner electrodes would be flooded with a sufficient amount of the lithium salt-containing organic electrolyte. To improve the cycleability characteristics, one requires to match carefully the Li+ activity in the organic electrolyte with electrode capacity. This would ensure stoichiometric lithium-ion insertion in the LTO electrode together with predominant lithium-ion insertion in the nNVP@C cathode.

Original languageEnglish
Pages (from-to)7523-7535
Number of pages13
JournalACS Sustainable Chemistry and Engineering
Volume8
Issue number19
DOIs
StatePublished - 18 May 2020

Keywords

  • cycleability
  • Li salt-based organic electrolyte
  • Li-ion full cell
  • LiTiOanode
  • microwave-assisted hydrothermal synthesis
  • NaV(PO)microflower
  • power density

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