Cobalt phosphide nanoparticles grown on Ti3C2 nanosheet for enhanced lithium ions storage performances

Zijing Wang, Fen Wang, Kaiyu Liu, Jianfeng Zhu, Tingru Chen, Zhanyong Gu, Shu Yin

Research output: Contribution to journalArticlepeer-review

Abstract

MXene is widely used as electrode materials in lithium-ion batteries due to its unique morphology, which realizes rapid ion diffusion and provides more ion insertion channels, whereas transition metal phosphides show a promising lithium storage performance in the field of energy storage due to their high theoretical capacity. In the present paper, cobalt phosphide nanoparticles (NPs) were self-grown on Ti3C2 sheets via a low-temperature phosphating method, which showed good cycle stability as the anode in lithium-ion batteries (LIBs). After 1000 cycles, the specific capacity was maintained at 650 mAh g−1 with a high coulombic efficiency (98.8%) at 700 mA g−1, which was approximately 4 and 6 times higher than that of pristine CoP–Co2P and pure Ti3C2, respectively. The enhanced electrochemical performance was attributed to the large specific surface (61.2 m2 g−1), which offered sufficient active sites for the electrochemical reaction. Also, the outstanding redox reaction activity of cobalt phosphide effectively improved the electrochemical reaction efficiency during the charge-discharge process. The strategy proposed in this study could be extended to other two dimensional (2D) materials to achieve their full potential.

Original languageEnglish
Article number157136
JournalJournal of Alloys and Compounds
Volume853
DOIs
Publication statusPublished - 2021 Feb 5

Keywords

  • Cobalt phosphide
  • Lithium-ion batteries
  • Nanocomposites
  • TiC-MXene

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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