A new ternary Sn–Ni–P anode material for Li-ion batteries shows high reversible capacity and excellent coulombic efficiency, with an initial discharge capacity and charge capacity of 785.0 mAh g-1 and 567.8 mAh g-1, respectively.
After the 100th discharge–charge cycling, capacity retention is 94.2% with a value of 534.8 mAh g-1. The electrode also performs with an excellent rate capacity.
A team at Xiamen University (China) synthesized the alloy rods array electrode by electrodeposition with a Cu nanorods array structured foil as current collector. The Cu nanorods array foil is fabricated by heat treatment and electrochemical reduction of Cu(OH)2 nanorods film, which is grown directly on Cu substrate through an oxidation method.
The Sn–Ni–P alloy rods array electrode is mainly composed of pure Sn, Ni3Sn4 and Ni–P phases.
A paper on their work was published in the journal Electrochemistry Communications.
Yun-Xiao Wang, Ling Huang, Yu-Qing Chang, Fu-Sheng Ke, Jun-Tao Li and Shi-Gang Sun (2010) Fabrication and electrochemical properties of the Sn–Ni–P alloy rods array electrode for lithium-ion batteries. Electrochemistry Communications doi: 10.1016/j.elecom.2010.06.025