Interlaboratory study assessing the analysis of supercapacitor electrochemistry data

Jamie Gittins (1) , Yuan Chen (1, 2) , Stefanie Arnold (3, 4) , Veronica Augustyn (5) , Andrea Balducci (6) , Thierry Brousse (7, 8) , Elzbieta Frackowiak (9) , Pedro Gómez-Romero (10, 11) , Archana Kanwade (12) , Lukas Köps (6) , Plawan Kumar Jha (13) , Dongxun Lyu (1) , Michele Meo (14) , Deepak Pandey (14) , Le Pang (15) , Volker Presser (3, 4, 16) , Mario Rapisarda (14) , Daniel Rueda-García (10, 11) , Saeed Saeed (5) , Parasharam Shirage (12) , Adam Ślesiński (9) , Francesca Soavi (17, 18) , Jayan Thomas (14) , Maria-Magdalena Titirici (2) , Hongxia Wang (16, 17) , Zhen Xu (1, 2) , Aiping Yu (19) , Maiwen Zhang (19) , Alexander Forse (1)

1 CAM - University of Cambridge [UK]
2 Department of Chemistry [Imperial College London]
3 INM - Leibniz Institute for New Materials
4 Saarland University [Saarbrücken]
5 NC State - North Carolina State University [Raleigh]
6 Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany]
7 IMN - Institut des Matériaux de Nantes Jean Rouxel
8 RS2E - Réseau sur le stockage électrochimique de l'énergie
9 PUT - Poznan University of Technology
10 ICN2 - ICN2 - Institut Catala de Nanociencia i Nanotecnologia
11 BIST - Barcelona Institute of Science and Technology
12 IITI - Indian Institute of Technology Indore
13 University of Southampton
14 UCF - University of Central Florida [Orlando]
15 QUT - Queensland University of Technology [Brisbane]
16 Saarene Saarland Ctr Energy Mat & Sustainabil
17 UNIBO - Alma Mater Studiorum Università di Bologna = University of Bologna
18 INSTM - National Interuniversity Consortium of Materials Science and Technology
19 Department of Systems Design Engineering [University of Waterloo]

Supercapacitors are fast-charging energy storage devices of great importance for developing robust and climate friendly energy infrastructures for the future. Research in this field has seen rapid growth in recent years, therefore consistent reporting practices must be implemented to enable reliable comparison of device performance. Although several studies have highlighted the best practices for analysing and reporting data from such energy storage devices, there is yet to be an empirical study investigating whether researchers in the field are correctly implementing these recommendations, and which assesses the variation in reporting between different laboratories. Here we address this deficit by carrying out the first interlaboratory study of the analysis of supercapacitor electrochemistry data. We find that the use of incorrect formulae and researchers having different interpretations of key terminologies are major causes of variability in data reporting. Furthermore we highlight the more significant variation in reported results for electrochemical profiles showing non-ideal capacitive behaviour. From the insights gained through this study, we make additional recommendations to the community to help ensure consistent reporting of performance metrics moving forward.

Mots clés: Data analysis; Electrochemical energy storage; Supercapacitors

Domaines: Chimie; Physique [physics]

Jamie Gittins, Yuan Chen, Stefanie Arnold, Veronica Augustyn, Andrea Balducci, et al.. Interlaboratory study assessing the analysis of supercapacitor electrochemistry data. Journal of Power Sources, 2023, 585, pp.233637. ⟨10.1016/j.jpowsour.2023.233637⟩. ⟨hal-04300555⟩