Enhanced high rate properties of ordered porous Cu2O film as anode for lithium ion batteries

✍ Scribed by J.Y. Xiang; X.L. Wang; X.H. Xia; L. Zhang; Y. Zhou; S.J. Shi; J.P. Tu

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 817 KB
• Volume: 55
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2010.03.091

✦ Synopsis

Highly ordered porous Cu 2 O film is electrodeposited on copper foil through a self-assembled polystyrene sphere template. Compared with the dense Cu 2 O film and the octahedral Cu 2 O powder, the ordered porous Cu 2 O film exhibits an improved electrochemical cycling stability. The capacity of the porous Cu 2 O film can maintain 336 mAh g -1 and 213 mAh g -1 after 50 cycles at the rate of 0.1 C and 5 C, respectively. The reversible capacity holds 63.4% as the discharge-charge rate even increases by 50 times. The enhanced high rate properties of the ordered porous film should be attributed to the sufficient contact surface of Cu 2 O/electrolyte and the short diffusion length of Li + . Moreover, the direct contact between Cu 2 O and current collector and the decreasing inactive interfaces of Cu 2 O/polymer binder are also suggested as being responsible for the enhanced high rate property.