A Self-Constructed Mg/K Co-Doped Prussian Blue with Superior Cycling Stability Enabled by Enhanced Coulombic Attraction.

Prussian blue (PB) is regarded as a promising cathode for sodium-ion batteries because of its sustainable precursor elements (e.g., Mn, Fe), easy preparation, and unique framework structure.

An Elastic Cross-Linked Binder for Silicon Anodes in Lithium-Ion Batteries with a High Mass Loading.

Due to the urgent demand for lithium-ion batteries (LIBs) with a high energy density, silicon (Si) possessing an ultrahigh capacity has aroused wide attention. However, its practical application is seriously hindered by enormous volume changes of the Si anode during cycling. Developing novel binders suitable for the Si anode has proven to be an effective strategy to improve its electrochemical performance.

Stable cycling of Prussian blue/Zn battery in a nonflammable aqueous/organic hybrid electrolyte.

Although rechargeable aqueous batteries are attracting increasing attention in recent years due to high safety, low cost, high power density and environmental friendliness, the aqueous batteries suffer from limited cycle life due to a narrow electrochemical window of the aqueous electrolytes, severe side reaction and instability of electrode materials in aqueous electrolytes. In this work, we propose a hybrid aqueous electrolyte with a mixed solvent of water and acetonitrile (ACN), which exhibits a wide electrochemical window, high ionic conductivity, and nonflammability. An aqueous battery with an iron hexacyanoferrate (FeHCF) cathode, Zn anode and HO/ACN hybrid electrolyte shows a high capacity of 69.

A multi-layered composite assembly of Bi nanospheres anchored on nitrogen-doped carbon nanosheets for ultrastable sodium storage.

Bismuth (Bi) is a promising anode candidate for sodium ion batteries (SIBs) with a high volumetric capacity (3765 mA h cm-3) and moderate working potential but suffers from large volume change (ca. 250%) during the sodiation/desodiation process, resulting in pulverization of the electrode, electrical contact loss, excessive accumulation of solid electrolyte interfaces, etc., devastating the cycling stability of the electrode seriously.

Nonflammable quasi-solid-state electrolyte for stable lithium-metal batteries.

Rechargeable lithium batteries with high-voltage/capacity cathodes are regarded as promising high-energy-density energy-storage systems. Nevertheless, these systems are restricted by some critical challenges, such as flammable electrolyte, lithium dendrite formation and rapid capacity fade at high voltage and elevated temperature. In this work, we report a quasi-solid-state composite electrolyte (QCE) prepared by polymerization reactions.