Bimetallic phosphide wrapped in hierarchically structured P, N co-doped porous carbon nanocatalysts for enhanced rechargeable Li[sbnd]O2 batteries

Lin Zhang, Shao Hua Luo*, Pengwei Li, Haitao Ma, Shengxue Yan

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

2 Citations (Scopus)

Abstract

Recently, transition-metal phosphides (TMPs) cathode materials possess tremendous prospects for lithium‑oxygen batteries (LOBs). However, designing highly efficient TMPs cathode materials achieving long-cycling stability still faces numerous obstacles. The hierarchical porous carbon is expected to be a remarkable substrate for transition-metal composites because of its high specific surface area and superior electrical conductivity. Herein, NiCoP@PNC hybrid catalysts consisting of NiCoP nanoparticles and heteroatom-doped carbon skeleton were prepared via simple freeze-drying and high-temperature pyrolysis methods. The NiCoP@PNC composites with a high specific surface area and rich interior porosity can effectively accelerate charge transfer and enhance electrocatalytic activity. Compared with either Co2P@PNC and PNC electrodes, the NiCoP@PNC cathode delivers an enhanced specific capacity of 14,028.1 mAh g−1 at 100 mA g−1. The NiCoP@PNC catalytic LOBs can reach 196 cycles with the fixed capacities of 500 mAh g−1 at 200 mA g−1 due to the increased electron transfer efficiency and improved electrochemical reaction kinetics. This approach provides a facile method to prepare TMP-based composite materials for developing high-performance LOBs.

Original languageEnglish
Article number110343
JournalJournal of Energy Storage
Volume81
ISSN2352-152X
DOIs
Publication statusPublished - 15 Mar 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

  • Electrode materials
  • Hybrid electrocatalysts
  • Li-O batteries
  • NiCoP nanoparticles
  • Porous carbon

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