A Spinel Tin Ferrite with High Lattice-Oxygen Anchored on Graphene-like Porous Carbon Networks for Lithium-Ion Batteries with Super Cycle Stability and Ultra-fast Rate Performances.

A new type of nano-SnFeO with stable lattice-oxygen and abundant surface defects anchored on ultra-thin graphene-like porous carbon networks (SFO@C) is prepared for the first time by an interesting freezing crystallization salt template method. The functional composite has excellent rate performance and long-term cycle stability for lithium-ion battery (LIB) anodes due to the stable structure, improved conductivity, and shortened migrating distance for lithium-ions, which are derived from the higher lattice-oxygen of SnFeO, abundant porous carbon networks and surface defects, and smaller nanoparticles. Under the ultra-high current density of 10, 15, and 20 A g cycling for 1000 times, the SFO@C can provide high reversible capacities of 522.

Synergistic effects of flake-like ZnO/SnFeO/nitrogen-doped carbon composites on structural stability and electrochemical behavior for lithium-ion batteries.

In order to improve the electrochemical performance and relieve volume expansion of pure SnFeO anode for lithium-ion batteries (LIBs), we synthesized a novel ZnO/SnFeO/nitrogen-doped carbon composites (ZSFO/NC) with flake-like polyhedron morphology by using ZIF-8 as a sacrificial template. Remarkably, it exhibited an initial charge/discharge capacities of 1078.3/1507.