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Interface-engineered PVP decorated nico LDH composite on coconut fibre for enhanced hydrovoltaic energy harvesting
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DOI：10.1007/s40243-026-00387-1.png)
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Abstract
En 中文
Renewable energy technologies are crucial for achieving global sustainability. Among green energy solutions, power generation through hydrovoltaic devices stands out as a particularly promising option. One of the promising materials for hydrovoltaic power generation is layered double hydroxide, a class of lamellar compounds in which interactions occur between water and the surface of the active material. In this work, a sustainable hydrovoltaic device is fabricated by decorating a synthesized NiCo LDH onto a natural coconut fibre substrate, providing an eco-friendly alternative to conventional systems and aligning with the Sustainable Development Goals. NiCo LDH is an ideal hydrovoltaic material due to its layered hydrophilic structure, tunable surface charge and efficient ion transport pathways. Intercalating polyvinyl pyrrolidone (PVP) into the NiCo LDH structure enhances its hydrophilicity and ionic conductivity, leading to improved efficiency in water-driven electricity generation. The fabricated devices, comprising NiCo LDH-decorated coconut fibre and PVP/NiCo LDH-decorated coconut fibre, were subjected to biased, sweep and loop measurements. The optimised device delivers an open-circuit voltage of 255 mV, a short-circuit current of 50 μA, and a maximum power density of 123.07 μW g⁻1. Additional data involving solvent variation and solar illumination were collected to elucidate the key operating parameters. This paper explores the synthesis, mechanism and potential of polymer-intercalated NiCo LDH for enhancing hydrovoltaic power generation, aimed at promoting a sustainable energy future.
Keywords:
Hydrovoltaic energy harvesting
Sustainable development goals
Bio-derived fibre substrate
Polyvinyl pyrrolidone
Nickel–cobalt layered double hydroxides
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5.5
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