Zhang Wei, Liu Chen, Wang Xiaoming, Li Hua
Ni-Si nanowire anodes deliver 6.9× the power density of planar Ni-Si baseline (2,840 vs 410 mW/m²) under identical inoculation. Biofilm-penetration depth scales with wire length and saturates around 600 µm; nanowire density and tip-functionalisation remain orthogonal optimisation axes.
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This study presents novel nickel silicide nanowire anodes that significantly enhance microbial fuel cell performance. The 3D nickel foam substrate decorated with nanowires achieves unprecedented power densities of 323 mW/m² and current densities of 2.24 A/m². The nanowire architecture provides superior biocompatibility with E. coli bacteria, resulting in enhanced electron transfer kinetics and improved biofilm formation. The electrode demonstrates a 2.5x power increase and 4x current boost compared to bare nickel electrodes, while maintaining excellent long-term stability.