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Characterization of microsupercapacitors
Journal
Microsupercapacitors
Date Issued
2021-01-01
Author(s)
Jha, Mihir Kumar
Subramaniam, Chandramouli
Abstract
The growing demand for on-chip miniaturized energy storage platforms has initiated considerable attention and research toward development of microsupercapacitors (MSCs). Aided by the ability for facile miniaturization and integration into micro- and nano-electronic systems, such microenergy storage units also double up as alternating current filtering systems. This has resulted in a paradigm shift toward MSCs and away from bulky aluminum electrolytic capacitors. A critical part of extracting high performance from MSCs is the comprehensive need to standardize and understand their operational characteristics. This chapter provides a detailed and critical evaluation of different techniques for characterizing the electrode, electrolyte, and their interface in MSCs. The discussion starts with understanding the physical properties of electrode-materials and subsequently focuses on their microscopy and spectroscopic characterization techniques. These techniques offer morphological, chemical, elemental, and design-based attributes to all the major components of a microsupercapacitive device, with the aim to derive a structure-property correlation among materials employed for MSCs. Standardized electrochemical techniques enabling the correct assessment of the performance of such MSCs are presented in detail. Importantly, the chapter depicts an exhaustive overview of frequency-dependent and frequency-independent electrochemical characteristics of MSCs. These discussions are expected to explicate our understanding of MSCs, originate meaningful solutions to current challenges and initiate further developments in this field.
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