Maria-Magdalena Titirici is Chair of Sustainable Energy Materials, Imperial College London, UK, and a Chair in Emerging Sustainable Technologies with the Royal Academy of Engineering.

Philipp Adelhelm is Professor for Physical Chemistry at the Humboldt University Berlin, Germany, and heads a joint research group on operando battery analysis at the Helmholtz-Zentrum Berlin für Materialien und Energie, Germany.

Yong-Sheng Hu is Full Professor and Director of Key Laboratory for Renewable Energy, Chinese Academy of Sciences, and Founder of HiNa Battery, China.

INTRODUCTION
Na-Ion Batteries Introduction and Electrochemistry
Na- versus Li-Ion Batteries

ANODES
Graphite
Graphene and CNTs
Hard Carbons
Soft Carbons
Alloys
Conversion Anodes
2D Materials
Organic Materials

CATHODES
Layer Transition Metals
Tunnel-Type Oxides
Phosphates and Mixed Polyanions
Prussian Blue Analogues
High Voltage Cathodes
Fe and Mn Based Cathodes for Na-Ion Batteries

ADVANCED CHARACTERIZATION OF NA-ION BATTERY ELECTRODES
Advanced "in Operando" X-Ray Characterization Methods for Na-Ion Batteries
Neutron and Muon Studies on Na Ion Battery Materials
NMR and MRI Applied to Na-Ion Batteries Characterization
Computational Studies on Na-Ion Electrode Materials
Mössbauer Spectroscopy

ELECTROLYTES
Carbonates vs Glmyes
Ionic Liquids
Ceramics/Nascion
Polymers

OTHER EMERGING NA TECHNOLOGIES
Na-Ion Capacitors
Aqueous Na Batteries
Na-O2 Systems
Na-S Batteries
Beyond Na: K- and Mg-Based Technologies

SAFETY, ECONOMICS, AND UPSCALING
Dendrite Formation and Failure of Na Batteries
Na-Ion Batteries Manufacturing
Battery Packages
Cost Analysis of Na-Ion Batteries Components
Commercialization of Na-Ion Batteries