In-situ carbon-coated Na 2 FeP 2 O 7 anchored in three-dimensional reduced graphene oxide framework as a durable and high-rate sodium-ion battery cathode

A Scalable Approach to Na2FeP2O7@Carbon/Expanded Graphite as a Low‐Cost and High‐Performance Cathode for Sodium‐Ion Batteries

“…Furthermore, the first four curves of these cathodes are separately offered in Figure S9b-d and distinct redox peaks at around 3 V can be clearly observed in the CV curves of NFPO@C/EG ( Figure S12d), which may indicate the highest reversible Na + insertion/extraction kinetics among these three samples. [27,46] Comparing with NFPO@C and NFPO/BC, NFPO@C/EG shows a higher current and a sharper peak in the potential range of 3.0~3.2 V, implying that NFPO@C/EG possess highly electrochemical reversibility and fast kinetics. It should be noted that, except for the first cycle, the subsequent CV curves of the three electrodes maintain good consistency, indicating that all obtained samples present good cycling stability.…”

“…[40] Another typical and common method is composing the active materials with electronically conductive substances (e. g. carbon, graphene). [41][42][43][44] Therefore, many kinds of nanosized and carbon modified Na 2 FeP 2 O 7 materials have been developed as cathode for SIBs, such as, Na 2 FeP 2 O 7 @C nanocomposite, [45] Na 2 FeP 2 O 7 /graphene, [46] and Na 2 FeP 2 O 7 /carbon nanotubes . [47] Apparently, due to the special composite structure, the electrochemical performances of these cathodes are distinctly enhanced.…”

Nanocomposite Materials for the Sodium–Ion Battery: A Review

“…They suffer, however, from low performance in terms of redox potential, capacity, and rate kinetics. To increase the rate capability of Na 2 FeP 2 O 7 ‐based material, Chen et al anchored Na 2 FeP 2 O 7 @carbon particles on a reduced graphene oxide framework through a facile urea‐nitrate combustion method . The composite exhibited a reversible sodium storage capacity of 65 mA h g −1 at a current density of 10 C, and no obvious decay could be found in its capacity after 300 cycles at 1 C. Recently, our group prepared a uniform carbon‐coated Na 3.32 Fe 2.34 (P 2 O 7 ) 2 /C composite .…”

Recent advances on flexible electrodes for Na-ion batteries and Li–S batteries

“…Hence, tailoring suitable cathodes, anodes, and electrolytes are essential to achieve high performance SIBs. Table 1 shows the theoretical capacity and voltage of cathode and anode materials for SIBs [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] , while Table 2 depicts the working potential range, capacity, and cycling stability of recently reported different kinds of cathode and anode materials for SIBs. Various high performance cathode materials for SIBs ( Table 2 ) such as layered oxide materials [33,34] , polyanionic compounds [35,36] , metal-hexacyanometalates [37] , and organic compounds [38] have been developed.…”