Chapter 9 **Chemically Exfoliated Graphene Nanosheets for Flexible Electrode Applications 127**

Joong Tark Han, Seung Yol Jeong, Hee Jin Jeong and Geon-Woong Lee

Preface

Nowadays, the world is facing challenges in the field of life science, energy, health, and the environment with enactment, healthiness, and toughness materials. It has been widely distin‐ guished that advanced materials including carbon-based nanomaterials such as carbon nano‐ tubes (CNTs), carbon blocks, and graphene oxide (GO) will continue to play a significant role in overcoming the major challenges and making the innovations in both technology and prac‐ tical application. Owing to the prolonged structural properties, GO and its nanocomposites hold unlimited promises that have been much more widely attracted in various important and versatile applications such as catalysis, energy conversion and storage devices, hydrogen storage materials, various lithium ion batteries, sodium ion batteries, zinc air batteries, sens‐ ing electronic devices, environment protection, photocatalyst for water splitting, water purifi‐ cation, and removal of air pollutants. The outstanding potential of graphene-based nanomaterials has enabled significant enrichments for abundant imperative applications. This book that gives a comprehensive information is envisioned to address the sustained progresses and challenges with a wide scope of attention, highlighting the fundamental un‐ derstanding of the synthesis and characterization and the performance of graphene and functionalized graphene oxide composite materials. To assist further technical challenges, practical applications and prospects of graphene and its composite materials are discussed,

**Dr. Ganesh S. Kamble**

Department of Chemistry National Tsing Hua University

Kolhapur, India

Hsinchu, Taiwan

Department of Engineering Chemistry

Kolhapur Institute of Technology's College of Engineering (Autonomous)

and numerous future research directions are also suggested in this book.
