Part1: Fundamentals,
1. Hydrogel: An Introduction to Advanced Energy Applications,
2. Hydrogel: Synthesis and Recent Advancement in Electrochemical Energy Storage,
3. Approaches for Hydrogel Synthesis,
4. Architecture of Hydrogels,
5. Characteristics of Hydrogels. Part2: Hydrogels for Energy Applications,
6. Hydrogels and their Emerging Applications,
7. Hydrogels for 3D Frameworks,
8. 3D Printing of Hydrogels,
9. Hydrogels for CO2 Reduction,
10.Recent Advancements in Hydrogels for Electrocatalytic Activities,
11. Hydrogels for Metal-Ion Batteries, Part3: Emerging Applications, Challenges, and Future Perspectives,
12. Hydrogels for Metal-Air Batteries,
13. Hydrogels for Flexible/Wearable Batteries,
14. Hydrogels for Flexible/Wearable Supercapacitors,
15. Hydrogels for Wearable Electronics,
16. Hydrogel for Removal of Water Content from Liquid Fuels,
17. Current Challenges and Perspective of Hydrogels