Traditional electrolytes are electrochemically unstable on the positive electrode surface. Here, the author designed a solvent locked electrolyte to form a stable boride/fluoride interface. The assembled Na||Na2.26Fe1.87(SO4)3 battery maintained 88.2% capacity after 16500 cycles at 1 A g-1.
- Jiyu Zhang
- Guochuan Tang
- Weihua Chen