Cu_2Se with facile synthesis as a cathode material for rechargeable sodium batteries

摘要

A Cu_2Se electrode on a copper grid substrate has been directly fabricated by a facile post-selenized method and tested as a positive material for sodium ion batteries. Cu_2Se exhibits large reversible capacities (about 250 mA h g~(-1)), good cyclic stabilities and low polarization. These results indicate that Cu_2Se is a promising candidate as a cathode material for sodium ion batteries.