利用磁控溅射技术合成了Ti Ta O薄膜涂层。采用体外血小板粘附试验、动态凝血时间测定以及动物体内试片埋植试验等评价方法 ,对涂层的抗凝血特性进行了研究 ;并采用Tauc法研究了涂层的禁带宽度。研究结果表明 ,Ti Ta O薄膜涂层具有良好...利用磁控溅射技术合成了Ti Ta O薄膜涂层。采用体外血小板粘附试验、动态凝血时间测定以及动物体内试片埋植试验等评价方法 ,对涂层的抗凝血特性进行了研究 ;并采用Tauc法研究了涂层的禁带宽度。研究结果表明 ,Ti Ta O薄膜涂层具有良好的抗凝血特性以及禁带宽度为 3.2eV的半导体特性。此外 ,探讨了Ti Ta O涂层的抗凝血机理 ,并提出材料的半导体特性是影响Ti Ta O涂层抗凝血特性的主要原因之一。展开更多
TiNb_(2)O_(7)(TNO) is regarded as a potential fastcharging anode for lithium-ion batteries due to its fast reversible phase transition and safe working potential,but it suffers from unsatisfactory electronic conductiv...TiNb_(2)O_(7)(TNO) is regarded as a potential fastcharging anode for lithium-ion batteries due to its fast reversible phase transition and safe working potential,but it suffers from unsatisfactory electronic conductivity,sluggish ion kinetics,and poor structural stability under high rates.Herein,tantalum(Ta) with strong Ta-O bonds is doped into TNO to enhance its fast-charging property and structural stability.Proper amount of Ta doping not only increases the interlayer spacing for fast Li^(+) transport,but also improves the electrical conductivity,being successfully proved by experimental analyses.Density functional theory(DFT) calculation verifies that the lattice distortion induced by the incorporation of strong Ta-O bonds can effectively strengthen the structural stability.Notably,in situ X-ray diffraction(XRD) technology reveals that Ta doping relieves volumetric strain during lithiation and de-lithiation.Thus,the optimized Ta_(0.1)-TNO sample owns impressive long-term cycling stability even at a high current density of 10C,which delivers a high-capacity retention of 85.12%(a capacity decay of less than 0.01% per cycle) after 1500 cycles.This work provides a fast-charging anode material with superior structural stability for lithium-ion batteries.展开更多
文摘利用磁控溅射技术合成了Ti Ta O薄膜涂层。采用体外血小板粘附试验、动态凝血时间测定以及动物体内试片埋植试验等评价方法 ,对涂层的抗凝血特性进行了研究 ;并采用Tauc法研究了涂层的禁带宽度。研究结果表明 ,Ti Ta O薄膜涂层具有良好的抗凝血特性以及禁带宽度为 3.2eV的半导体特性。此外 ,探讨了Ti Ta O涂层的抗凝血机理 ,并提出材料的半导体特性是影响Ti Ta O涂层抗凝血特性的主要原因之一。
基金financially supported by Jilin Province Science and Technology Department Major Science and Technology Project(Nos.20220301004GX and 20220301005GX)the Key Subject Construction of Physical Chemistry of Northeast Normal University,the Fundamental Research Funds for the Central Universities(No.2410024XK010)the National Natural Science Foundation of China(No.22279014)
文摘TiNb_(2)O_(7)(TNO) is regarded as a potential fastcharging anode for lithium-ion batteries due to its fast reversible phase transition and safe working potential,but it suffers from unsatisfactory electronic conductivity,sluggish ion kinetics,and poor structural stability under high rates.Herein,tantalum(Ta) with strong Ta-O bonds is doped into TNO to enhance its fast-charging property and structural stability.Proper amount of Ta doping not only increases the interlayer spacing for fast Li^(+) transport,but also improves the electrical conductivity,being successfully proved by experimental analyses.Density functional theory(DFT) calculation verifies that the lattice distortion induced by the incorporation of strong Ta-O bonds can effectively strengthen the structural stability.Notably,in situ X-ray diffraction(XRD) technology reveals that Ta doping relieves volumetric strain during lithiation and de-lithiation.Thus,the optimized Ta_(0.1)-TNO sample owns impressive long-term cycling stability even at a high current density of 10C,which delivers a high-capacity retention of 85.12%(a capacity decay of less than 0.01% per cycle) after 1500 cycles.This work provides a fast-charging anode material with superior structural stability for lithium-ion batteries.
