Abstract: Ni and NiO nanocomposite (Ni@NiO)as well as NiO were prepared by low temperature pyrolysis in air atmosphereusing C₄H₆O₄Ni·4H₂O and Ni(NO₃)₂·6H₂O as raw materials. The microstructure and electrochemical properties of the two samples were characterized by XRD, SEM, cyclic voltammetry and galvanostatic charge-discharge method. Results from the characterizations show that both materials contain NiO crystals. Ni@NiO is formed by stacking spherical particles with a particle size of 20~110 nm, and NiO is composed of irregular micro-particles. Ni@NiO has better lithium storage performance. When the voltage keeps a range of 0~3 V and the current keeps a range of 0.1 A/g, the first charge specific capacity of Ni@NiO reaches as high as 827.7 mAh/g, and the first coulomb efficiency becomes 77.1% as a consequence.

Key words: Ni@NiO, low temperature, anode, Li-ion battery