Effect of precursor solution temperature on the morphology and electrochemical performance of electrodeposited MnO₂ nanofilms for lithium-ion batteries

Figures & data

Figure 1. Preparation of nano-MnO₂ electrodes at different precursor solution temperatures.

Figure 2. SEM images of MnO₂ electrodes prepared with different precursor solution temperatures.

Figure 3. TEM image of manganese dioxide electrode prepared with precursor solution at 50°C.

Figure 4. The electrochemical performance of MnO₂ battery. (a) Discharge curves of each battery; (b) Rate performance of each battery; (c) Charging and discharging curves of 50°C MnO₂ at different current densities; (d) the cycling performance of each battery at a current density of 1C; (e) CV curves of different samples at 0.2 mV s⁻¹; (f) Nyquist curves of different samples.

Table 1. Fit values of R₀, R₁, and R₂ for each battery.

Sample	R0 (Ω)	R1 (Ω)	R2 (Ω)
25℃-MnO2	3.7	3.8	98
40℃-MnO2	3.3	3.2	90.6
50℃-MnO2	4.0	4.7	65.8
60℃-MnO2	3.7	5.9	74.2