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batteries.
110 100 90 80 70 60 50 40 30 Coulombic efficiency (%) 20 10 sodium-ion
100
90 for anode
Charge Discharge 80 70 60
Porous carbon MnFe 2 O 4 500 mA g −1 50 40 Cycle number (n) high-performance as
N
20 30 nanofibers
N 2 700 °C 1h Air 280 °C 2h Mn(CH 3 COO) 2 •4H 2 O 800 700 600 500 400 300 200 100 0 10 0 (C) (A) Production method of freestanding MnFe 2 O 4 /CNF, (B) charge-discharge behavior, and (C) cycling performance of a full NIB cell using A/g. 0.5 MnFe 2 O 4 @C
PAN Fe(NO 3 ) 3 •9H 2 O Specific capacity (mA h/g) of density J.
700 current Chen
600 at L, Jiao
500 400 Specific capacity (mA h/g) cathode, C, Yu N,
12 mL DMF 0.6 g PAN 3mmol Mn(Ac) 2 •4H 2 O 6mmol Fe(NO 3 ) 3 •9H 2 O 15 kV Current density 500 mA/g 1st 2nd 3rd 50th 100th 300 200 Na 3 V 2 (PO 4 ) 2 F 3 /C Zhang Y, Liu
(A) 100 from
0 and
anode permission 16;2016:3321–28.
3.5 3.0 2.5 2.0 1.5 1.0
(B) with
Battery voltage (V)
Fig. 12.7 MnFe 2 O 4 /CNF Adapted Lett Nano
