【摘 要】
：
Due to the sufficient ion diffusion channels provided by the large interlayer spacing,layered silicates are widely considered as potential anode materials for lithium ion and sodium ion batteries.However,due to the poor electronic conductivity,the applica
【机 构】
：
Key Laboratory of Advanced Ceramics and Machining Technology of the Ministry of Education, School of
论文部分内容阅读
Due to the sufficient ion diffusion channels provided by the large interlayer spacing,layered silicates are widely considered as potential anode materials for lithium ion and sodium ion batteries.However,due to the poor electronic conductivity,the application of layered silicates for electrochemical energy storage has been greatly limited.Carbon nanotube (CNT) film has excellent electrical conductivity and a unique interconnected network,making it an ideal matrix for composite electrochemical material.We herein report a CNT@nickel silicate composite film (CNT@NiSiO) fabricated by a SiO2-mediated hydrothermal conversion process,for sodium storage with excellent electrochemical properties,The obtained composite possesses a cladding structure with homogeneous nanosheets as the outermost and CNT film as the inner network matrix,providing abundant ion diffusion channels,high electronic conductivity,and good mechanical flexibility.Due to these merits,this material possesses an excellent electrochemical performance for sodium storage,including a high specific capacity up to 390 mAh g-1 at 50 mA g-1,good rate performance up to 205 mAh g-1 at 500 mA g-1,and excellent cycling stability.On this basis,this work would bring a promising material for various energy storage devices and other emerging applications.
其他文献
Lithium-sulfur batteries (LSBs) are promising alternative energy storage devices to the commercial lithium-ion batteries.However,the LSBs have several limitations including the low electronic conductivity of sulfur (5 × 10-30 S cm-1),associated lithium po
The molten mixtures of alkali metal fluorides and aluminum fluoride are applied as aluminum electrolytes or brazing fluxes.However,the presence of Al2F7-in such molten systems is disputed.In the present study,MF-AlF3 (M =K,Cs) systems with molar ratios ＜
β-Ge3N4 loaded with nanoparticulate RuO2 as a cocatalyst is the first successful non-oxide photocatalyst for overall water splitting.To get an insight into the working mechanism of this particular photocatalytic system,we have calculated geometrical struc
Lithium-sulfur (Li-S) battery is a potential energy storage technology with high energy density and low cost.However,the gap between theoretical expectation and practical performance limits its wide implementation.Herein,we report a nitrogen-doped porous
Thermal runaway is the main factor contributing to the unsafe behaviors of lithium-ion batteries (LIBs) in practical applications.The application of separators for the thermal shutdown has been proven as an effective approach to protecting LIBs from therm
Lithium metal has a high theoretical capacity of 3860 mAh g-1 and a low electrochemical potential (-3.04V vs.H2/H+).Hence,using a lithium anode significantly improves the energy density of a secondary battery.However,the lithium dendrites generated on the
In this work,a comprehensive study on the deliberate molecular design and modifications of electron donors is carried out to elucidate correlations between the methoxy effects and donor configuration of hole-transporting materials (HTMs).Our initial findi
A series of CuO/Ce1-xZrxO2 catalysts (x =0.2,0.4,0.6 and 0.8) are applied to elaborate the effect of the Zr/Ce ratio on the catalytic performance of CO2 hydrogenation to CH3OH.The best catalytic performance is achieved with CuO/Ce0.4Zr0.6O2,exhibiting XCO
Silicon has a large impact on the energy supply and economy in the modern world.In industry,high purity silicon is firstly prepared by carbothermic reduction of silica with the produced raw silicon being further refined by a modified Siemens method.This p
Surface passivation via post-treatment with organic reagents is a popular strategy to improve the stability and efficiency of perovskite solar cell.However,organic passivation still suffers from the weak bonding between organic chemicals and perovskite la