Porous Co3O4 nanoneedle arrays growing directly on copper foils and their ultrafast charging/discharging as lithium-ion battery anodes

• DOI: 10.1039/c1cc10462d
• Publication Date: 2011-03-17T11:00:30Z
• Authors: Xin-Yu Xue; Shuang Yuan; Li-Li Xing; Zhao-Hui Chen; Bin He; Yu-Jin Chen
• Keywords: Surface Properties; Oxides; Cobalt; 02 engineering and technology; Lithium; 7. Clean energy; Nanostructures; Electric Power Supplies; Particle Size; 0210 nano-technology; Electrodes; Porosity; Copper

Ultrafast charging/discharging of lithium-ion battery anodes is realized from porous Co(3)O(4) nanoneedle arrays growing on copper foils. Their charge time can be shortened to ∼6 s, their reversible capacity at 0.5C rate is 1167 mAh/g. This implies that nano-arrays growing directly on copper foils are good candidates for anodes.