The search for alternative energy storage devices has led to the development of psuedocapacitors that offer large capacitance storage, high power densities and fast charge-discharge rates. Such redox supercapacitors use faradaic reactions to store large amounts of energy and are promising devices for surge power providers, coupled storage systems with energy harvesters, portable electronics etc. Ordered dense arrays of one-dimensional, crystalline MnO2 nanoparticles further enhance available surface areas, provide shorter diffusion paths, improved reaction kinetics and better stress accommodation enabling higher capacitive performance. However, large scale fabrication of electrodes with dense arrays of well-aligned crystalline MnO2 nanorods or nanowires has not yet been successfully achieved.In this work, we propose to first prepare highly crystalline MnO2 nanorods by hydrothermal synthesis and then align/deposit them using a low-cost, room temperature, MEMS-compatible technique called high voltage electrophoretic deposition (HVEPD). The scalability of the process is also demonstrated by continuous printing.

Scalable fabrication of psuedocapacitor electrodes using continuous high voltage electrophoretic deposition

243rd National Meeting (2012)

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