Na4MnV(PO4)3-rGO as Advanced cathode for aqueous and non-aqueous sodium ion batteries

Kumar, P. Ramesh; Kheireddine, Aziz; Nisar, Umair; Essehli, Rachid; Amin, Ruhul; Belharouak, Ilias

doi:10.1016/j.jpowsour.2019.04.080

Title: Na₄MnV(PO₄)₃-rGO as Advanced cathode for aqueous and non-aqueous sodium ion batteries

Journal Article · Wed Jul 31 00:00:00 EDT 2019 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2019.04.080· OSTI ID:1567002

Kumar, P. Ramesh ^[1]; Kheireddine, Aziz ^[1]; Nisar, Umair ^[2]; Essehli, Rachid ^[3]; Amin, Ruhul ^[3];

^[3]

Hamad Bin Khalifa Univ., Qatar Foundation, Doha (Qatar). Qatar Environment and Energy Research Inst. (QEERI)
Qatar Univ., Doha (Qatar). Center for Advanced Materials (CAM)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

NASICON-type Na₄MnV(PO₄)₃ with reduced graphene oxide (rGO) has been synthesized by the simple sol-gel reaction and characterized by different analytical techniques. The resulted material has been explored as a cathode material for rechargeable non-aqueous and aqueous sodium-ion batteries. In non-aqueous electrolytes, the as-synthesized Na₄MnV(PO₄)₃-rGO composite shows stable discharge capacity of 86 mAh g^-1 at 0.1 C and 68 mAh g^-1 at 0.2 C after 100 cycles in half-cell and full-cell configurations, respectively. In aqueous electrolytes, it delivers an initial discharge capacity of 92 mAh g^-1 at 1 C rate in half-cells and 97 mAh g^-1 at 10 C rate in full-cells having NaTi₂(PO₄)₃-MWCNT as the anode. Stable cycleability and high rate capabilities of Na₄MnV(PO₄)₃-rGO composite can be attributed to the very strong and sustainable conductive percolation networks for both electrons and Na⁺ ions. The obtained results reveal that the aqueous electrolyte cell has a huge scope for gird level energy storage applications.