Figure 3.

Plot of the current generation against applied potential measured by linear sweep voltammetric method after storage TTI solution at 25 °C with certain interval time. —: 80 min, ⋅ ⋅ ⋅ ⋅ ⋅: 60 min, - - - - - : 40 min, – – – –: 20 min, –⋅–⋅–⋅–⋅: 10 min, and –⋅⋅–⋅⋅–⋅⋅: only glucose solution.