Rational Designed 3D Interconnected Porous Tin Dioxide Cube with Reserved Space for Volume Expansion as Advanced Anode of Lithium-Ion Batteries

To against the volume expansion (~300 %) of SnO2 during lithiation, here a sub-micro sized, interconnected, and porous SnO2 cube with rational designed reserved space (~375 %) is synthesized via an artful topochemistry route (CaSn(OH)6 – CaSnO3 – SnO2). Benefits from the unique microstructure, this novel material harvests great enhanced lithium-storage performance.