Cyclic carbonate based-electrolytes enhancing the electrochemical performance of Na4Fe3(PO4)2(P2O7) cathodes for sodium-ion batteries

NASICON-type air-stable and all-climate cathode for sodium-ion batteries with low cost and high-power density

“…The electrolyte consisted of ethylene carbonate/propylene carbonate (EC/PC, 1:1 by volume) with 1 M NaClO 4 as the sodium salt and 5 vol. % fluoroethylene carbonate (FEC) as additive 35 . The NFPP-E electrode showed excellent electrochemical performance at various current densities (Fig.…”

Exploits, advances and challenges benefiting beyond Li-ion battery technologies

“…The electrolyte 1M NaClO 4 / EC:PC offered more stable electrochemical performance of the Na 4 Fe 3 (PO 4 ) 2 (P 2 O 7 ) electrode with hard carbon anode for use in SIBs. The substitution of NaClO 4 with NaPF 6 offered better SEI thermal stability [77,80].…”

A Promising Carbon/g‐C3N4 Composite Negative Electrode for a Long‐Life Sodium‐Ion Battery

“…stability of the electrode materials.T he NIBs with C/g-C 3 N 4 demonstrate av ery high capacity among the g-C 3 N 4 based negative electrode materials (Supporting Information, Table S4). [35] Furthermore, irreversible phase transformation of Na 2 C 6 O 6 under high voltage operation should be solved to achieve higher performance.Further improvement in the electrochemical stability and performance could be achieved by the choices of electrolyte solvents, [34b] additives (for example,fluoroethylene carbonate) and electrode preparation methods (for example, roll-pressing). Herein we report for the first time an ultralong cycle-life NIB with low-cost and scalable materials.W en ote that higher energy density of rocking-chair batteries can be achieved by operating them in larger voltage windows,a nd some reported systems showed impressive performance with al arge voltage window (for example,upto4V; Supporting Information, Table S1).…”

“…Thelow CE observed in these trials could be mainly due to the decomposition of electrolyte because the electrolyte used for this full cell (that is,0 .8 m sodium perchlorate in the binary solvents of ethylene carbonate and diethylene carbonate) starts to oxidize beyond 3.5 Vv s. Na/Na + . [35] Furthermore, irreversible phase transformation of Na 2 C 6 O 6 under high voltage operation should be solved to achieve higher performance.Further improvement in the electrochemical stability and performance could be achieved by the choices of electrolyte solvents, [34b] additives (for example,fluoroethylene carbonate) and electrode preparation methods (for example, roll-pressing).…”