Article, 2024

Bimetallic phosphide wrapped in hierarchically structured P, N co-doped porous carbon nanocatalysts for enhanced rechargeable LiO2 batteries

Journal of Energy Storage, ISSN 2352-152X, 2352-1538, Volume 81, Page 110343, 10.1016/j.est.2023.110343

Contributors

Zhang, Lin [1] Luo, Shao-Hua (Corresponding author) [1] Li, Pengwei 0000-0001-9441-2847 [1] [2] Ma, Haitao [1] Yan, Sheng-Xue [1]

Affiliations

  1. [1] Northeastern University
    2. [NORA names: China; Asia, East];
  2. [2] Aalborg University
    3. [NORA names: AAU Aalborg University; University; Denmark; Europe, EU; Nordic; OECD]

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.

Keywords

LiO2 batteries, NiCoP, NiCoP nanoparticles, PNC, activity, area, battery, bimetallic phosphides, capacity, carbon, carbon skeleton, catalyst, cathode, cathode materials, charge, charge transfer, composite materials, composition, conductivity, efficiency, electrical conductivity, electrocatalytic activity, electrochemical reaction kinetics, electrode, electron transfer efficiency, enhanced electrocatalytic activity, enhanced specific capacity, faces numerous obstacles, freeze-drying, hierarchical porous carbon, hierarchically, high-performance lithium-oxygen batteries, high-temperature pyrolysis method, improved electrochemical reaction kinetics, increased electron transfer efficiency, kinetics, lithium-oxygen, lithium-oxygen batteries, long cycling stability, materials, method, nanocatalysts, nanoparticles, numerous obstacles, obstacles, phosphide, porosity, porous carbon, pyrolysis method, reaction kinetics, skeleton, specific capacity, stability, structure P, substrate, superior electrical conductivity, surface, surface area, transfer, transfer efficiency, transition-metal compositions, transition-metal phosphides

Funders

  • National Natural Science Foundation of China
  • Science and Technology Development Fund

Data Provider: Digital Science

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