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High-Performance Phosphorus-Graphite Dual-Ion Battery.

Dandan Yu1, Liwei Cheng1, Mengxue Chen1

  • 1School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering , Beihang University , Beijing 100191 , China.

ACS Applied Materials & Interfaces
|November 16, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel sodium-dual-ion battery (SDIB) using a phosphorus anode and graphite cathode. This high-performance battery offers superior capacity and cyclability, advancing energy storage solutions.

Keywords:
alloying anodesdual-ion batteriesphosphoruspresodiationsodium ions

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Dual-ion batteries (DIBs) are emerging as a viable alternative to lithium-ion batteries.
  • Developing high-performance sodium-based DIBs (SDIBs) is crucial due to sodium's abundance.

Purpose of the Study:

  • To construct and characterize a novel phosphorus-graphite SDIB.
  • To investigate the electrochemical performance and ion insertion mechanism of this new SDIB.

Main Methods:

  • Fabrication of a phosphorus-based anode and graphite cathode for SDIB.
  • Electrochemical testing including capacity, rate capability, and cyclability measurements.
  • Ex situ characterization using X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy.

Main Results:

  • A novel phosphorus-graphite SDIB was successfully constructed.
  • The SDIB demonstrated a high working voltage (~3.9 V) and reversible capacity (373 mA h/g).
  • Presodiation enhanced cycling stability by forming a protective NaF-rich solid electrolyte interphase layer.

Conclusions:

  • The developed phosphorus-based SDIB exhibits excellent electrochemical performance, surpassing many existing DIBs.
  • The study elucidates the Na+ ion insertion/extraction mechanism via Na-P alloying.
  • Phosphorus-based SDIBs show significant potential for practical electrochemical energy storage.