Synthesis and Investigation of CuGeO Nanowires as Anode Materials for Advanced Sodium-Ion Batteries.

Germanium is considered as a potential anode material for sodium-ion batteries due to its fascinating theoretical specific capacity. However, its poor cyclability resulted from the sluggish kinetics and large volume change during repeated charge/discharge poses major threats for its further development. One solution is using its ternary compound as an alternative to improve the cycling stability. Here, high-purity CuGeO nanowires were prepared via a facile hydrothermal method, and their sodium storage performances were firstly explored. The as-obtained CuGeO delivered an initial charge capacity of 306.7 mAh g along with favorable cycling performance, displaying great promise as a potential anode material for sodium ion batteries.