NSTI Nanotech 2009

A 3-D Nanobattery System With Individually-wired Nano-electrodes For Enhanced Performance

D. Teeters, P. Johnson
The University of Tulsa, US

Keywords: 3-D battery architecture, nanobaskets, nanobatteries, nanowires

Abstract:

The utilization of individual nanostructured components as part of a three-dimensional (3D) micro-structured battery system has been proposed as the means to promote ion diffusion in electrode materials by substantially increasing the effective electrode surface area to improve energy per unit area characteristics and promote a high rate charge/discharge capacity. Such features should enhance general battery performance, but they are of particular importance for thin film batteries and microbatteries that have the necessary power for such devices as microelectromechanical systems (MEMS). A novel three-dimensional nanoarchitecture, which is desirable for enhanced battery performance, was formed by individually wiring nanostructured electrodes of SnO2 and LiCoO2. Short, capped nanotubes termed ‘nanobaskets’ are formed by RF-magnetron sputtering onto nanoporous aluminum oxide templates. Copper nanowires are grown by electrochemical deposition from the nanobaskets and through the alumina template, making intimate electrical contact with each nanobasket electrode and thereby providing a new means of maximizing electrode performance. Electrochemical testing data and examples of a functioning battery using this nano 3-D architecture will be given.
 
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