Chapter 01 Metal-Air Batteries: An Introduction Felipe M. de Souza, Anuj Kumar, Ram K. Gupta Chapter 02 Materials and Electrochemistry of Metal-Air Battery Anubha Tomar, Sakshee Chandel, Alok Kumar Rai Chapter 03 Electrochemical Fundamentals and Issues of Metal-Air Batteries Shasha Lia, Enze Lib, Xiaowei And, Guoqing Guanc Chapter 04 Mathematical Modeling for Enhanced Electrochemical Properties Yuhui Tian, Shanqing Zhang, Yun Wang Chapter 05 Materials and Technologies of Mg-Air Primary Batteries Xingrui Chen, Qichi Le, Jeffrey Venezuela, Andrej Atrens Chapter 06 Materials and Technologies of Al-Air Batteries Weng Cheong Tan, Lip Huat Saw, Ming Chian Yew, Ming Kun Yew Chapter 07 Materials and Technologies of Other Metal-air Batteries Dhavalkumar N. Joshi, Vinod Kumar Chapter 08 Novel Architectural Designs for Improved Performance José Béjar, Minerva Guerra-Balcázar, Lorena Álvarez-Contreras, Noé Arjona Chapter 09 Phase-Engineered Materials as Efficient Electrocatalysts for Metal-air Batteries Mengyang Dong, Huajie Yin, Porun Liu, Huijun Zhao Chapter 10 Noble Metal-based Electrocatalysts for Metal-Air Batteries Jun Mei Chapter 11 1D Materials as Electrocatalysts for Metal-Air Batteries Merve Gençtürk, Emre Biçer Chapter 12 2D Materials as Electrocatalysts for Metal-Air Batteries Eren Kursun, Abdullah Uysal, Solen Kinayyigit Chapter 13 3D Materials as Electrocatalysts for Metal-Air Batteries Demet Ozer Chapter 14 Carbon-based Electrocatalysts for Metal-Air Batteries Zongge Li, Guoxin Zhang Chapter 15 Metal Oxide-Based Electrocatalysts for Metal-Air Batteries Bhugendra Chutia, Chiranjita Goswami, Pankaj Bharali Chapter 16 Enhanced Performance of Lithium-Air Batteries by Improved Cathode Materials B. Jeevanantham, M. K. Shobana Chapter 17 Aqueous Electrolytes Rijith S, Sarika S, Akhila M, Sumi V S Chapter 18 Non-aqueous Electrolytes in Metal-Air Batteries Pravin N. Didwal, An-Giang Nguyen, Satyanarayana Maddukuri, Rakesh Verma Chapter 19 Ionic Electrolytes Vandana, Fabeena Jahan, Anjali Paravannoor, Baiju Kizhakkekilikoodayil Vijayan Chapter 20 Hybrid-Electrolyte Metal-Air Batteries Yifei Wang, Xinhai Xu, Mingming Zhang, Meng Ni, Dennis Y.C. Leung Chapter 21 Polymer Electrolytes Changlin Liu, Shasha Li, Abuliti Abudula, Guoqing Guan Chapter 22 Hydrogel Electrolytes Siyuan Zhao, Tong Liu, Meng Ni Chapter 23 Wearable Metal-Air Batteries Arpana Agrawal, Chaudhery Mustansar Hussain Chapter 24 Flexible Metal-Air Batteries Runwei Mo Chapter 25 Challenges in Metal-Air Batteries Alexander Kube, Dennis Kopljar