Journal
ADVANCED ENERGY MATERIALS
Volume 12, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202103143
Keywords
blue energy; carbon neutral fuel; seawater splitting; self-powered electrochemical system; triboelectric nanogenerators
Categories
Funding
- National Key R&D Project from Minister of Science and Technology [2016YFA0202704]
- National Natural Science Foundation of China [51432005, 51702018, 51561145021]
- Youth Innovation Promotion Association, CAS
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The proposed self-powered electrochemical system converts blue energy from ocean waves into green energy via hydrogen fuel through triboelectric nanogenerator (TENG) devices and an electrolyzer. After optimization, the system can achieve high-efficiency hydrogen generation, demonstrating its potential towards carbon neutrality.
Utilizing hydrogen energy produced by water electrolysis is conducive to carbon neutrality from a technological point of view. However, this perspective is restrained by the high electricity cost in commercial development. Powering electrochemical reactions by renewable electricity converted from distributed mechanical energy can lead to commercial electric energy saving and cost reduction. In this work, a self-powered electrochemical system (SPECS) is proposed for the conversion from blue energy of ocean waves to green energy via hydrogen fuel. This system consists of triboelectric nanogenerator (TENG) devices and an electrolyzer, where the TENG devices serve as ocean wave energy harvesters for electricity generation, while the seawater-containing electrolyzer is employed for hydrogen generation. After power management on the output of the TENGs and electrochemical reaction optimization, the system can generate hydrogen at a rate of 814.8 mu L m(-2) d(-1) and a Faraday efficiency of 69.1% under ideal operation conditions, demonstrating the practical potential of the constructed system toward carbon neutralization.
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