Front Matter -- Sustainable Materials for Electrochemical Supercapacitors / R Kumar, R Thangappan -- Solid Waste-Derived Carbon Materials for Electrochemical Capacitors / Shreeganesh Subraya Hegde, Badekai Ramachandra Bhat -- Metal Hydroxides / Rida Fatima, Sania Naseer, Muhammad Rehan Hasan Shah Gilani, Muhammad Aamir, Javeed Akhtar -- Porous Organic Polymers / V Renuga -- Gel-Type Natural Polymers as Electroconductive Materials / Arshpreet Kaur, Madhvi, Dhiraj Sud -- Ionic Liquids for Supercapacitors / Guocai Tian -- Functional Binders for Electrochemical Capacitors / Purnima Baruah, Debajyoti Mahanta -- Sustainable Substitutes for Fluorinated Electrolytes in Electrochemical Capacitors / Sina Yaghoubi, Seyyed Mojtaba Mousavi, Seyyed Alireza Hashemi, Aziz Babapoor, Chin Wei Lai -- Aqueous Redox-Active Electrolytes / S Ranganatha -- Biodegradable Electrolytes / Tuba Saleem, Ijaz Rasul, Habibullah Nadeem, Sanora Sehar, Arfaa Sajid -- Supercapattery / Fiona Joyline Mascarenhas, Shreeganesh Subraya Hegde, Badekai Ramachandra Bhat -- Ceramic Multilayers and Films for High-Performance Supercapacitors / Sonali Verma, Bhavya Padha, Sandeep Arya -- Potential Applications in Sustainable Supercapacitors / Pitchaimani Veerakumar -- Wearable Supercapacitors / Preety Ahuja, Sanjeev Kumar Ujjain, M Ramanand Singh, Neelu Dheer, Rajni Kanojia -- Electrospun Materials / Hina Sahar, Sania Naseer, Muhammad Rehan Hasan Shah Gilani, Syed Ali Raza Naqvi, Muhammad Aamir, Javeed Akhtar -- Polysaccharide Biomaterials for Electrochemical Applications / Neelam Srivastava, Dipti Yadav -- Polymer Inks for Printable Supercapacitors / Yurui Liu, Yijie Zhou, Yanfei Xu -- Biomass-Derived Carbon for Supercapacitors / M Priyadharshini, T Pazhanivel, K R Hariprasath -- Index