Chitosan improves stability of carbon nanotube biocathodes for glucose biofuel cells

Abstract

We demonstrate a novel combined chitosan–carbon-nanotube–enzyme biocathode with a greatly enhanced and stable long-term current density of −0.19 mA mL⁻¹. The fibrous microstructure of the electrode improves the performance of the biocathode by creating a protective microenvironment, preventing the loss of the electrocatalytic activity of the enzyme, and providing good oxygen diffusion.