Angewandte Chemie International Edition · 2019 · 183 citations · 68 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemical EngineeringElectrochemistryMaterials ChemistryBattery MaterialsElectrochemical CellsElectrochemical Energy StorageElectrode MaterialsEnergy StorageEnergy Storage MaterialsChemical AdsorptionCoulombic EfficiencyEncapsulation MaterialsLithium-sulfur BatteriesMechanical StrengthNanostructured Battery MaterialsSpecific CapacitySulfur Cathodes
Abstract TiO 2− x with well‐controlled hollow multi‐shelled structures (HoMSs) were designed and synthesized, via a sequential templating approach (STA), to act as sulfur carrier materials. They were explored as physico‐chemical encapsulation materials. Particularly, the sulfur cathode based on triple‐shelled TiO 2− x HoMSs delivered a specific capacity of 903 mAh g −1 with a capacity retention of 79 % at 0.5 C and a Coulombic efficiency of 97.5 % over 1000 cycles. The outstanding electrochemical performance is attributed to better spatial confinement and integrated conductivity of the intact triple‐shell that combine the features of physico‐chemical adsorption, short charge transfer path along with mechanical strength.
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