Effect of CNT as a Conducting Agent

When AB was used as the conducting agent for the Mn02/CNT nanocomposite electrode, the initial specific capacitance was approximately 250 F/g at a current density 1 A/g, as shown in Fig. 10.9. 

However, at 10 A/g, the specific capacitance decreased due to an increase in the ohmic drop with increasing current density. In order to improve the high rate capability of the Mn02/CNT nanocomposite electrode, the AB was replaced with CNT as the conducting agent in the preparation ofthe Mn02/CNT nanocomposite electrode. 

Leroux et al. reported the electrochemical behavior of various layered manganese oxides. They reported that interlayer water played a major role in the electrochemical behavior of manganese oxides. In their study, dehydrated manganese oxides at T greater than 200°C showed better retention over 10 cycles and a larger Li+ diffusion coefficient because of the decreased level of interlayer 

In order to estimate the oxidation state of Mn in the Mn02/CNT nanocomposite at the charged and discharged states, the XANES 

4 Nanosized Lithium Manganese Oxide Dispersed on Carbon Nanotubes 

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