Amorphous mesoporous GeO _x anode for Na-ion batteries with high capacity and long lifespan.

ABSTRACT: It is recently demonstrated that amorphous Ge anode shows higher reversible Na-ion storage capacity (590 mA h g^-1) than crystallized Ge anode (369 mA h g^-1). Here, amorphous GeO _x anode is prepared by a simple wet-chemistry reduction route at room temperature. The obtained amorphous GeO _x shows a porous hierarchical architecture, accompanied with a Brunauer-Emmett-Teller surface area of 159 m² g^-1 and an average pore diameter of 14 nm. This unique structure enables the GeO _x anode to enhance the Na-ion/electron diffusion rate, and buffer the volume change. As anode for Na-ion battery, high reversible capacity over 400 mA h g^-1, fine rate capability with a capacity of 200 mA h g

SUBMITTER: Shen K 

PROVIDER: S-EPMC5792927 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature