【摘 要】
：
The construction of advanced electrode materials is key to the field of energy storage.Herein,a free-standing anatase titania(TiO2) nanocrystal/carbon nanotube (CNT) film is reported using a simple and scalable sol-gel method,followed by calcination.This
【机 构】
：
College of Chemistry and Chemical Engineering,Qufu Normal University,Jingxuan West Road NO.57,Qufu 2
论文部分内容阅读
The construction of advanced electrode materials is key to the field of energy storage.Herein,a free-standing anatase titania(TiO2) nanocrystal/carbon nanotube (CNT) film is reported using a simple and scalable sol-gel method,followed by calcination.This unique free-standing film comprises ultra-small TiO2 nanocrystals (～ 5.9 nm) and super-aligned CNTs,with ultra-dispersed TiO2 nanocrystals on the surfaces of the CNTs.On the one hand,these TiO2 nanocrystals can significantly decrease the diffusion distance of the charges and on the other hand,the cross-linked CNTs can act as a three-dimensional (3D) conductive network,allowing the fast transport of electrons.In addition,the film is free-standing,without requiring electrode fabrication and additional conductive agents and binders.Owing to these above synergistic effects,the film is directly used as an anode in Li-ion batteries,and delivers a high discharge capacity of ～ 105 mAh·g-1 at high rate of 60 C (1 C =170 mA·g-1) and excellent cycling performance over 2,500 cycles at 30 C.These results indicate that the free-standing anatase TiO2 nanocrystal/CNT film affords a superior performance among the various TiO2 materials and can be a promising anode material for fast-charging Li-ion batteries.Moreover,the TiO2/CNT film exhibits an areal capacity of up to 2.4 mAh·cm-2,confirming the possibility of its practical use.
其他文献
The interlayer coupling in van der Waals (vdW) heterostructures (vdWHs) is at the frontier of the fundamental research,underlying many optical behaviors.The graphene/MoS2 vdWHs provide an ideal platform to reveal the good interfacial coupling between grap
Electrically responsive electrochemical actuators that contain a polymer electrolyte membrane laminated between two electrodes have attracted great attention due to their potential applications in smart electronics,wearable devices,and soft robotics.Howev
Phosphorescent carbon nanodots (CNDs) have various attractive properties and potential applications,but it remains a formidable challenge to achieve large-scale phosphorescent CNDs limited by current methods.Herein,a large-scale synthesis method for phosp
Second near-infrared (NIR-Ⅱ) fluorescence imaging is a recently emerged technique and is highly useful for accurate diagnosis of cancer.Although a diverse array of fluorescent nanomaterials have been developed to enable NIR-Ⅱ fluorescence in various situa
The optical and optoelectronic characteristics of SnS nanosheets with strong anisotropic crystal structure are researched.Transmission electron microscopy and polarized Raman spectra are used to determine the crystal orientation of SnS nanosheets.The phot
Gene therapy using small interfering RNA (siRNA) is emerging as a novel therapeutic approach to treat various diseases.However,safe and efficient siRNA delivery still constitutes the major obstacle for clinical implementation of siRNA therapeutics.Here we
Many transition metal sulfides and phosphides are susceptible to surface oxidation under ambient conditions.The formed surface oxidation layer,which is likely to further restructure under reaction conditions,alters the chemical properties of the pristine
Nanomagnets are widely used to store information in non-volatile spintronic devices.Spin waves can transfer information with low-power consumption as their propagations are independent of charge transport.However,to dynamically couple two distant nanomagn
In this study,the size of the titanium organic cage was controlled to achieve the restricted growth from a single Ag(Ⅰ) atom(Ag@Ti5) to rare all-carboxylate-protected superatomic Ag cluster (Ag6@Ti6).The classical octahedral Ag64+ cluster with two delocal
Large-scale renewable energy must overcome conversion and storage challenges before it can replace fossil fuels due to its intermittent nature.However,current sustainable energy devices still suffer from high cost,low efficiency,and poor service life prob