Fig. 1From: Preparation of PPy-Coated MnO2 Hybrid Micromaterials and Their Improved Cyclic Performance as Anode for Lithium-Ion BatteriesSEM images of PPy coated urchin-like MnO2 sample. In the top left-hand corner is pure PPy, a urchin-like MnO2 sample, b 10 μL, c 20 μL, d 30 μL, and e 50 μL pyrrole-coated urchin-like MnO2 sample. The scale bar is 1 μmBack to article page