Novel peapod-like Ni2P nanoparticles with improved electrochemical properties for hydrogen evolution and lithium storage
- 28 November 2014
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Nanoscale
- Vol. 7 (4), 1446-1453
- https://doi.org/10.1039/c4nr05862c
Abstract
A novel peapod-like Ni2P/C nanocomposite is designed and synthesized using NiNH4PO4H2O nanorods as templates. With enriched nanoporosity and large active surface areas, the peapod-like composites offer superb dual functionality as both electrocatalysts for the hydrogen evolution reaction (HER) and anodes for lithium ion batteries (LIBs). Electrochemical tests demonstrate that the Ni2P/C nanocomposite exhibits an overpotential as low as 60 mV and a notably low Tafel slope of 54 mV dec.−1. When used as an anode material for lithium-ion batteries, the resulting peapod-like Ni2P/C nanocomposite delivers high specific capacitances of 632 mA h g−1 at 0.1 A g−1 and 439 mA h g−1 at 3 A g−1, and also exhibits a superior cycling performance, with nearly 100% capacity retention even after 200 charge–discharge cycles at a charge–discharge rate of 0.1 A g−1. The work demonstrates that the peapod-like materials reported herein are promising materials for electrochemical energy-related applications such as HER and LIBs.Keywords
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