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Interweaved Nickel Phosphide Sponge as an Electrode for Flexible Supercapattery and Water Splitting Applications

Interweaved Nickel Phosphide Sponge as an Electrode for Flexible Supercapattery and Water Splitting Applications
Surendran, SubramaniShanmugapriya, SathyanarayananShanmugam, SangarajuVasylechko, LeonidKalai Selvan, Ramakrishnan
DGIST Authors
Shanmugam, Sangaraju
Issue Date
ACS Applied Energy Materials, 1(1), 78-92
Article Type
Author Keyword
alkaline electrolyte; bifunctional electrocatalyst; flexible electrode; multifunctional; nickel phosphide; spongy material; supercapattery; water splitting
A unique multifunctional electrode made of well-defined highly crystalline Ni-P nanoparticles interweaved apiece to form sponge-like structure prepared by the single-step hydrothermal method. The distinct phases of interlinked nanospherical Ni-P compounds (Ni 2 P, Ni 2 P/Ni 12 P 5 , and Ni 12 P 5 ) were obtained at 140 °C with different reaction time periods. The Ni 2 P exhibits supreme specific capacity of 206 mA h g -1 (1354 F g -1 ) at 5 mA cm -2 , which seems to be the highest among the Ni 2 P reported so far. Biomass-derived activated carbon was prepared as a negative electrode (135 F g -1 at 1 mA cm -2 ) to fabricate a flexible supercapattery gadget, which delivered remarkable energy density and power density of 42 W h kg -1 and 2856 W kg -1 respectively, at 3 mA cm -2 even after 10000 cycles. The Ni-P coated carbon cloth has shown immense mechanical strength and durability, which was tempting to use for electrocatalytic application. Both oxygen evolution reaction and hydrogen evolution reaction trials resulted in the evolution of an enormous amount of gas bubbles with low overpotentials of 278 and 234 mV to achieve a current density of 10 mA cm -2 , respectively. Hence, the dominant Ni-P electrodes were made multifunctional by demonstrating its potential application for efficient appliances. Copyright © 2018 American Chemical Society.
American Chemical Society
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
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Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles

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