Core–Shell NaBH<sub>4</sub>@Na<sub>2</sub>B<sub>12</sub>H<sub>12</sub> Nanoparticles as Fast Ionic Conductors for Sodium-Ion Batteries
Xiaoxuan Luo, Aditya Rawal, Muhammad Salman, Kondo‐François Aguey‐Zinsou
Abstract
Herein, we report on a method to engineer a conductive interface to promote high Na+ ionic conductivity in NaBH4. By controlled reaction with B2H6, the ionic conductivity of NaBH4 is enhanced by 5 orders of magnitude at room temperature. The origin of the enhanced conductivity is believed to be the result of the formation of a Na2B12H12 layer on the surface of α-NaBH4 particles. The resultant NaBH4@Na2B12H12 heterostructure exhibits a high ionic conductivity of 10–4 S cm–1 at 115 °C superior to that of pristine NaBH4 and shows the potential to act as a solid-state electrolyte for all Na solid-state batteries.
Topics & Concepts
Ionic conductivityConductivityIonic bondingElectrolyteMaterials scienceNanoparticleIonElectrical conductorChemical engineeringFast ion conductorNanotechnologyInorganic chemistryChemical physicsAnalytical Chemistry (journal)ElectrodeChemistryPhysical chemistryComposite materialOrganic chemistryEngineeringAdvanced Battery Materials and TechnologiesHydrogen Storage and MaterialsAdvancements in Battery Materials