Supercapacitor: Instrumentation, Measurement and Performance Evaluation Techniques (eBook)

Dr. Satyajit Ratha pursued his PhD at the School of Basic Sciences, Indian Institute of Technology Bhubaneswar, India. Prior to joining IIT Bhubaneswar, he received his Bachelor of Science, with first Class Honours from the Utkal University in 2008 and Master of Science from Ravenshaw University in 2010. His research interests include two-dimensional semiconductors; nanostructure synthesis and applications, energy storage devices and supercapacitors. He has authored and co-authored 20 peer-reviewed articles in international journals, and one book.Dr. Aneeya Kumar Samantara is currently working as a postdoctorate fellow at the School of Chemical Sciences, National Institute of Science Education and Research, Khordha, India. He pursued his PhD at CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, India. Before joining the PhD programme, he completed his M.Phil. in Chemistry from Utkal University and Master in Science in Advanced Organic Chemistry at Ravenshaw University. His research interests include the synthesis of metal chalcogenides and graphene composites for energy storage and conversion applications. He has authored articles in 19 peer- reviewed international journals, one book and three book chapters. Further two books and three research papers are in press.

Preface 7
About This Book 9
Contents 10
About the Authors 11
Abbreviations 12
Abstract 14
1 Introduction 15
2 Instrumentation and Measurement 18
2.1 Different Configurations of Supercapacitor 19
2.1.1 Conventional Configurations 19
2.1.2 Non-conventional Configurations 23
2.2 Key Parameters 31
2.2.1 Specific Capacitance 31
2.2.2 Specific Energy and Specific Power 32
2.2.3 Operating Potential Window 33
2.2.4 Cyclic Stability 34
3 Characterization and Performance Evaluation of Supercapacitor 36
3.1 Double-Layer Formation and Diffusion Process 36
3.2 Surface Adsorption 37
3.3 Pseudocapacitors 38
3.4 Evaluation Techniques 40
3.4.1 Cyclic Voltammetry 41
3.4.2 Step Potential Electrochemical Spectroscopy 42
3.4.3 Constant Current Charge Discharge (CCCD) 43
3.4.4 Electrochemical Impedance Spectroscopy 44
3.4.5 Ideal and Non-ideal Capacitor and the Origin of ESR 46
3.5 Evaluation of Capacitance 48
3.5.1 From the Cyclic Voltammetry Curve 49
3.5.2 From the Constant Current Charge–Discharge Curve 51
3.5.3 From Electrochemical Impedance Spectroscopy 52
3.6 Evaluation of Specific Energy (Es) 53
3.7 Evaluation of Specific Power (Ps) 54
4 Summary and Focus Point 57
References 59