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A simple, efficient, and cost-effective extended graphite as a supporting platform further supported the MnO 2  growth for the construction of hierarchical flower-like MnO 2 /extended graphite. MnO 2 /extended graphite exhibited an increase in sp 2  carbon bonds in comparison with that of extended graphite. It can be expected to display better electrical conductivity and further promote electron/ion transport kinetics for boosting the electrochemical performance in supercapacitors and glucose sensing. In supercapacitors, MnO 2 /extended graphite delivered an areal capacitance value of 20.4 mF cm −2  at 0.25 mA cm −2  current densities and great cycling stability (capacitance retention of 83% after 1000 cycles). In glucose sensing, MnO 2 /extended graphite exhibited a good linear relationship in glucose concentration up to about 5 mM, sensitivity of 43 μA mM −1 cm −2 , and the limit of detection of 0.081 mM. It is further concluded that MnO 2 /extended graphite could be a good candidate for the future design of synergistic multifunctional materials in electrochemical techniques.

Extended Graphite Supported Flower-like MnO2 as Bifunctional Materials for Supercapacitors and Glucose Sensing