12,875 research outputs found
Implanting a preferential solid electrolyte interphase layer over anode electrode of lithium ion batteries for highly enhanced Li plus diffusion properties
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A Porous N-doped Carbon 3D Nanoweb-Li₂S Cathode Material for High-Performance Lithium-Sulfur Battery
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A multifunctional SnO2-nanowires/carbon composite interlayer for high- performance lithium-sulfur batteries
No full textRecently, lithium-sulfur (Li-S) batteries have been demonstrated as promising next-generation energy-storage devices. However, their practical application is hindered by poor cycling performance and rate capability. In this study, we prepared a multifunctional interlayer composed of SnO2 nanowires (NWs) and conductive carbon paper (CP) to enhance the electrochemical performance of Li-S batteries. This SnO2 NWs@CP interlayer could efficiently adsorb lithium polysulfides and provide electron-conductive pathways to the sulfur electrode, leading to suppression of the polysulfide shuttle effect and enhancement of the electrochemical reaction kinetics for cycling performance and rate capability. A lithium-sulfur cell fabricated with SnO2 NWs@CP interlayer at a high sulfur loading amount (ca. 4.0 mg cm(-2)) could deliver a high specific capacity of 815 mAh g(-1) (based on sulfur) even after 100 cycles at 0.2 degrees C with a high coulombic efficiency of 98.2%. These results demonstrate that the introduction of multifunctional SnO2 NWs@CP interlayers should be a promising new strategy for the development of high-energy-density Li-S batteries.11Nsciescopu
Highly active Ruddlesden-Popper catalyst with in situ grown Co-Ni alloy nanoparticles for efficient CO₂ electrolysis to CO
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Plasma-induced oxygen vacancies in amorphous MnOx boost catalytic performance for electrochemical CO2 reduction
No full textRecently, oxygen vacancy engineering represents a new direction for rational design of high-performance catalysts for electrochemical CO2 reduction (CO2RR). In this work, a series of amorphous MnOx catalysts with different concentrations of oxygen vacancies, namely, low (a-MnOx-L), pristine (a-MnOx-P), and high oxygen vacancy (a-MnOx-H), have been prepared by simple plasma treatments. The resultant a-MnOx-H catalyst with a larger amount of oxygen vacancy on the catalyst surface is able to preferentially convert CO2 to CO with a high Faradaic efficiency of 94.8% and a partial current density of 10.4 mA cm(-2) even at a relatively lower over-potential of 510 mV. On the basis of detailed experimental results and theoretical density functional theory (DFT) calculations, the enhancement of CO production is attributable to the abundant oxygen vacancies formed in the amorphous MnOx which should favor CO2 adsorption/activation and promote charge transfer with the catalyst for efficient CO2 reduction.11Nsciescopu
Boosting electrochemical CO₂ reduction on N-doped carbon nanowebs with sulfur engineering
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In situ exsolved CoNi alloy nanoparticles anchored on a Ruddlesden-Popper support as an SOEC cathode for efficient CO2 electrolysis
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Sulfur tolerant catalyst fabricated with in situ exsolved CoNi alloy nanoparticles socketed on Ruddlesden-Popper support for efficient CO₂ electrolysis to CO
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