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. 2024 May 14;10(10):e31220. doi: 10.1016/j.heliyon.2024.e31220

Fig. 5.

Fig. 5

The methyl cellulose-based recycle-carbon fiber electrode in phosphoric acid electrolyte (a) Cyclic voltammetry curves under different scan rates; (b)Specific capacitance at different scan rates; (c) The galvanostatic charge/discharge graph and internal resistances at a constant current of 0.20 mA.