The nanostructures of transition metal oxides have gained
considerable attention for energy storage devices as they can
deliver high levels of electrical power and offer long operating
lifetimes, but their specific capacitance is too low for many
important applications. The poor conductivity of metal oxides
limits the charge/discharge rate for high energy/power densities
and the specific capacitance severely decreases under high current.
In this book we proposed a simple and an efficient method to
improve the conductivity of metal oxide nanowires based electrodes
by interweaving nanowires with MWCNTs to form hybrid energy storage
devices which allow fast electron transport, fast ion diffusion and
high-energy storage densities. In addition MWCNTs can accommodate
large strain without pulverization, provide good electronic contact
and conduction, display short ions insertion distances and make
them promising candidates as electrodes in high-performance energy
storage devices.
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