Na4Mn9O18/Carbon Nanotube Composite as a High Electrochemical Performance Material for Aqueous Sodium-Ion Batteries

Table 2 Performance comparison of Na_xMnO₂-based cathodes for aqueous sodium-ion batteries

Materials	Reversible capacity (mAh g⁻¹)	Cycle number	Current density	Applied potential range (V)	Reference
Na₄Mn₉O₁₈	40	100th	4 C	0.5–2	[35]
Na_0.95MnO₂	40	1000th	4 C	1–2	[39]
NaMnO₂	27.8	500th	5 C	0.5–1.8	[40]
Na₄Mn₉O₁₈	40	–	0.1 C	0.2–0.9	[41]
Na_0.35MnO₂	43	500th	200 mA g⁻¹	0–1	[42]
Na₄Mn₉O₁₈/CNT	53.2	150th	4 C	1–1.85	This work