Bioinspired Carbon/SnO2 Composite Anodes Prepared from a Photonic Hierarchical Structure for Lithium Batteries.

摘要: A carbon/SnO2 composite (C-SnO2) with hierarchical photonic structure was fabricated from the templates of butterfly wings. We have investigated for first time its application as anode material lithium-ion batteries. It demonstrated to high reversible capacities, good cycling stability, and excellent high-rate discharge performance, shown by a capacitance ∼572 mAh g(-1) after 100 cycles, 4.18 times that commercial SnO2 powder (137 g(-1)); far better recovery capability 94.3% observed step-increase sudden-recovery current. An obvious synergistic effect found between porous, hierarchically microstructure presence carbon; synergy guarantees an effective flow electrolyte short diffusion length lithium ions, provides considerable buffering room, prevents aggregation particles in discharge/charge processes. This nature-inspired strategy points out new direction fabrication alternative materials.