A new gridding cyanoferrate anode material for lithium and sodium ion batteries: Ti0.75Fe0.25[Fe(CN)6]0.96·1.9H2O with excellent electrochemical properties

• A cyanoferrate Ti0.75Fe0.25[Fe(CN)6]0.96·1.9H2O can be used as a new anode material.
• The cynaoferrate reacts with lithium following a conversion reaction mechanism.
• The cynnoferrate can store much more lithium than sodium.

A novel air-stable titanium hexacyanoferrate (Ti0.75Fe0.25[Fe(CN)6]0.96·1.9H2O) with a cubic structure is synthesized simply by a solution precipitation method, which is first demonstrated to be a scalable, low-cost anode material for lithium-ion batteries exhibiting high capacity, long cycle life and good rate capability. Nevertheless, it has a low capacity of about 100 mAh g−1 as an anode material for sodium-ion batteries.