Anode Properties of Cu-Coated Si Thick Film Electrodes Prepared by Electroless Deposition and Gas-Deposition

作者：Usui Hiroyuki; Nishinami Hiroyuki; Iida Takahisa; Sakaguchi Hiroki^*

来源：Electrochemistry, 2010, 78(5): 329-331.

DOI：10.5796/electrochemistry.78.329

• Si Anode Material
• Electroless Deposition
• Gas-deposition
• Lithium Rechargeable Battery

Thick film electrodes of Cu-coated Si particles were fabricated by an electroless deposition and a successive gas-deposition, and were evaluated their electrochemical properties as an anode of Li-ion battery. The discharge capacity and its retention at the 1000th cycle were 570 m Ah g(-1) and 61%. The excellent cycle life performance is attributed to an enhanced electrical conductivity due to the Cu-coating and a reversible conversion reaction between Li and Cu2O which was formed on the Cu surface. The high capacity retention is caused by a high fracture toughness of the coated Cu which can effectively relax a stress induced by volume expansion of Si as a buffer matrix.

• 出版日期2010-5