Reversible Na+ insertion/extraction in conductive polypyrrole-decorated NaTi2(PO4)3 nanocomposite with outstanding electrochemical property

Abstract In the present work, we have fabricated the polypyrrole-modified NaTi2(PO4)3 (NaTi2(PO4)3@PPy) nanocomposite for sodium energy storage via the sol-gel approach and the self-assembly procedure. The physical and electrochemical performances for the resulted NaTi2(PO4)3@PPy have been characterized in this research. Benefiting from the conductive polypyrrole coating, the NaTi2(PO4)3@PPy displays outstanding sodium storage property with the specific capacity of 95.9 mAh g−1 at 20 C after 400 cycles.