Journal
ADVANCED SCIENCE
Volume 6, Issue 6, Pages -Publisher
WILEY
DOI: 10.1002/advs.201801670
Keywords
3D printing; electrochemical full cells; electroless plating; polymers; water splitting
Categories
Funding
- Saint Gobain [R-284-000-140-597]
- NUS [R-261-509-001646, R-261-509-001-733, NRF-CRP16-2015-01 (R-284-000-159-281)]
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In this work, the plating of high-quality amorphous nickel-phosphorous coating with low resistivity of 0.45 mu Omega m (298 K) on complex 3D printed polymeric structures with high uniformity is reported. Such a polymer metallization results in an effective conductivity of 4.7 x 10(4) S m(-1). This process also allows flexible structures to maintain their flexibility along with the conductivity. Octet-truss structures with nickel-iron-(oxo) hydroxide nanosheets electrodeposited onto further displays excellent water-splitting performance as catalytic electrodes, i.e., in KOH (1 m, aq), a low oxygen evolution reaction (OER) overpotential of 197 mV at 10 mA cm(-2) and Tafel slope of 51 mV dec(-1). Using this light-weight electrode with high specific area, strength, and corrosion resistance properties, a fully functional water-splitting system is designed and fabricated through the concentric integration of 3D printed components. A dense polymeric mesh implemented is also demonstrated as an effective separator of hydrogen and oxygen bubbles in this system.
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