Sodium-Ion Batteries

15Sodium‐Ion Full Batteries

15.1 Introduction

To broaden the application of sodium‐ion batteries (SIBs), it is critical to optimize the key electrode materials in Chapters 3–10, the electrolytes in Chapters 11–13 and the binders in Chapter 14, and assemble them into high‐performance full batteries. Nowadays, three types of SIBs are widely studied, including nonaqueous, aqueous, and all‐solid‐state SIBs. The main challenge in developing high‐performance aqueous SIBs lies in the relatively narrow electrochemical stable voltage window, which leads to low energy density. One common strategy to widen the window is using high‐concentration electrolyte, but increasing the amount of electrolyte salts will further increase the cost, which is against ...