Self‐discharge in supercapacitors. Part I: Conway's diagnostics

Deeksha Nimmakayala, Shaswat Srivastava and Sanjeev Kumar

Wiley Interdisciplinary Reviews: Energy and Environment, 2024, vol. 13, issue 2

Abstract: Supercapacitors have emerged as drivers for the advancement of green energy technologies in energy storage systems and energy‐efficient devices. Their ability to rapidly acquire and deliver charge at high current densities and long cycle life is key. However, their high self‐discharge rates prevent their potential use in a wide range of applications, especially when utilizing commonly available activated carbon electrodes. Addressing this bottleneck is hindered by the lack of a comprehensive understanding of the self‐discharge processes. In this article, we provide a concise overview of various types of supercapacitors, followed by an exploration of self‐discharge phenomena within electrochemical systems. Recognizing the limited understanding at a molecular level, this article focuses on characterizing self‐discharge through the nature of the gradual decline in cell potential. We then survey the use of diagnostic methods in the literature to elucidate one or more controlling mechanisms operating during self‐discharge, facilitating a rational search for mitigation. We conclude by emphasizing the need for caution when interpreting controlling mechanisms solely based on cell potential measurements over time. This article is categorized under: Emerging Technologies > Energy Storage

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://doi.org/10.1002/wene.515

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:bla:wireae:v:13:y:2024:i:2:n:e515

Ordering information: This journal article can be ordered from
http://www.blackwell ... bs.asp?ref=2041-8396

Access Statistics for this article

Wiley Interdisciplinary Reviews: Energy and Environment is currently edited by Peter Lund and John Byrne

More articles in Wiley Interdisciplinary Reviews: Energy and Environment from Wiley Blackwell
Bibliographic data for series maintained by Wiley Content Delivery ().