ACS Applied Materials & Interfaces · 2018 · 134 citations · 46 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemical EngineeringElectrochemistryNanomaterialsAnode MaterialsBattery MaterialsCarbon NanotubesElectrode MaterialsEnergy Storage MaterialsNanocompositesAnode PerformanceCarbon Nanotube CompositesCarbon Nanotube NanocompositesComposite AnodesCoulombic EfficiencyHigh-capacity Anode MaterialsSodium-ion Battery AnodesZinc Selenide
Sodium-ion batteries (SIBs) are considered as one of the most favorable alternative devices for sustainable development of modern society. However, it is still a big challenge to search for proper anode materials which have excellent cycling and rate performance. Here, zinc selenide microsphere and multiwalled carbon nanotube (ZnSe/MWCNT) composites are prepared via hydrothermal reaction and following grinding process. The performance of ZnSe/MWCNT composites as a SIB anode is studied for the first time. As a result, ZnSe/MWCNTs exhibit excellent rate capacity and superior cycling life. The capacity retains as high as 382 mA h g–1 after 180 cycles even at a current density of 0.5 A g–1. The initial Coulombic efficiency of ZnSe/MWCNTs can reach 88% and nearby 100% in the following cycles. The superior electrochemical properties are attributed to continuous electron transport pathway, improved electrical conductivity, and excellent stress relaxation.
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