Smart construction of battery-type anodes with high rate and good mechanical properties is significant for advanced sodium ion capacitors(SICs).Herein,a flexible film consisting of MoO_(2) subnanoclusters encapsulated...Smart construction of battery-type anodes with high rate and good mechanical properties is significant for advanced sodium ion capacitors(SICs).Herein,a flexible film consisting of MoO_(2) subnanoclusters encapsulated in nitrogen-doped carbon nanofibers(MoO_(2) SCs@N-CNFs)is designed and synthesized via electrospinning toward SICs as anodes.The strong N-Mo interaction guarantees the stable yet uniform dispersion of high loading MoO_(2) SCs(≈40 wt.%)in the flexible carbonaceous substrate.The sub-nanoscale effect of SCs restrains electrode pulverization and improves the Na+diffusion kinetics,rendering better pseudocapacitance-dominated Na+-storage properties than the nanocrystal counterpart.The MoO_(2) SCs@N-CNFs paper with mass loadings of 2.2–10.1 mg cm^(−2) can be directly used as free-standing anode for SICs,which exhibit high reversible gravimetric/areal capacities both in liquid and quasi-solid-state electrolytes.The assembled flexible SICs competitively exhibit exceptional energy density and cycling stability.More significantly,the sub-nanoscale engineering strategy here is promisingly generalized to future electrode design for other electrochemical energy-related applications and beyond.展开更多
With the continuous development of two-dimensional (2D) transition metal carbides and nitrides(collectively referred to as MXene).Nowadays,more than 70 MXene materials have been discovered,and the number is still incr...With the continuous development of two-dimensional (2D) transition metal carbides and nitrides(collectively referred to as MXene).Nowadays,more than 70 MXene materials have been discovered,and the number is still increasing.Among them,the V_(2)CT_(x) MXene has attracted considerable attentions due to its outstanding physical and chemical properties.In this review,we mainly discussed the emerging V_(2)CT_(x) MXene and its derivative systems in various energy storage devices.Firstly,an introduction of the V-based MXene and its derivatives along with their synthetic methodologies is provided,then we summarize their applications in specific energy storage devices,such as metal (Li,Na,K,Mg,Zn and Al) ion batteries,lithium-sulfur batteries,supercapacitors and metal-ion capacitors.Finally,the main challenges and future perspectives existing in V-based MXene and its derivatives are reasonably put forward.展开更多
The emerging use of laser irradiation in synthesis smartly bridges“nanotech-nology”and“light”,and has attracted enormous attention as an efficient syn-thetic methodology for versatile nanomaterials toward electroc...The emerging use of laser irradiation in synthesis smartly bridges“nanotech-nology”and“light”,and has attracted enormous attention as an efficient syn-thetic methodology for versatile nanomaterials toward electrochemical energy storage and conversion devices(ESCDs).In this review,recent contributions and progress regarding the laser-induced nanomaterials for ESCDs are com-prehensively summarized,with a special focus on their practical utilization in rechargeable batteries,supercapacitors and electrocatalysis.The laser-induced synthesis strategies and corresponding mechanisms involved in nano-architecture generation/regulation,including pulsed laser deposition and laser irradiation in liquid,are also discussed in detail.With the in-depth insights into the mechanisms and revolutionary advancements of laser irradiation tech-nology,the comprehensive performances of ESCDs have been strikingly opti-mized.Finally,the existing challenges and future directions in this booming research field are outlined.This review will exert the significant guidance for future design and purposeful fabrication of advanced laser-induced nano-materials with appealing properties for advanced ESCDs and beyond.展开更多
基金This work is supported by the National Natural Science Foundation of China (No.51772127,51772131,and 52072151)Jinan Independent Innovative Team (2020GXRC015)+2 种基金Taishan Schol-ars (No.ts201712050)Natural Science Doctoral Foundation of Shandong Pro-vince (ZR2019BEM038)Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong.
文摘Smart construction of battery-type anodes with high rate and good mechanical properties is significant for advanced sodium ion capacitors(SICs).Herein,a flexible film consisting of MoO_(2) subnanoclusters encapsulated in nitrogen-doped carbon nanofibers(MoO_(2) SCs@N-CNFs)is designed and synthesized via electrospinning toward SICs as anodes.The strong N-Mo interaction guarantees the stable yet uniform dispersion of high loading MoO_(2) SCs(≈40 wt.%)in the flexible carbonaceous substrate.The sub-nanoscale effect of SCs restrains electrode pulverization and improves the Na+diffusion kinetics,rendering better pseudocapacitance-dominated Na+-storage properties than the nanocrystal counterpart.The MoO_(2) SCs@N-CNFs paper with mass loadings of 2.2–10.1 mg cm^(−2) can be directly used as free-standing anode for SICs,which exhibit high reversible gravimetric/areal capacities both in liquid and quasi-solid-state electrolytes.The assembled flexible SICs competitively exhibit exceptional energy density and cycling stability.More significantly,the sub-nanoscale engineering strategy here is promisingly generalized to future electrode design for other electrochemical energy-related applications and beyond.
基金financially supported by the National Natural Science Foundation of China (Nos. 51772127, 51772131 and 52072151)Taishan Scholars (No. ts201712050)+2 种基金Jinan Independent Innovative Teamthe Natural Science Doctoral Foundation of Shandong Province (No. ZR2019BEM038)the Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong。
文摘With the continuous development of two-dimensional (2D) transition metal carbides and nitrides(collectively referred to as MXene).Nowadays,more than 70 MXene materials have been discovered,and the number is still increasing.Among them,the V_(2)CT_(x) MXene has attracted considerable attentions due to its outstanding physical and chemical properties.In this review,we mainly discussed the emerging V_(2)CT_(x) MXene and its derivative systems in various energy storage devices.Firstly,an introduction of the V-based MXene and its derivatives along with their synthetic methodologies is provided,then we summarize their applications in specific energy storage devices,such as metal (Li,Na,K,Mg,Zn and Al) ion batteries,lithium-sulfur batteries,supercapacitors and metal-ion capacitors.Finally,the main challenges and future perspectives existing in V-based MXene and its derivatives are reasonably put forward.
基金National Natural Science Foundation of China,Grant/Award Numbers:51772127,51772131,52072151Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong+1 种基金Jinan Independent Innovative TeamTaishan Scholars,Grant/Award Number:ts201712050。
文摘The emerging use of laser irradiation in synthesis smartly bridges“nanotech-nology”and“light”,and has attracted enormous attention as an efficient syn-thetic methodology for versatile nanomaterials toward electrochemical energy storage and conversion devices(ESCDs).In this review,recent contributions and progress regarding the laser-induced nanomaterials for ESCDs are com-prehensively summarized,with a special focus on their practical utilization in rechargeable batteries,supercapacitors and electrocatalysis.The laser-induced synthesis strategies and corresponding mechanisms involved in nano-architecture generation/regulation,including pulsed laser deposition and laser irradiation in liquid,are also discussed in detail.With the in-depth insights into the mechanisms and revolutionary advancements of laser irradiation tech-nology,the comprehensive performances of ESCDs have been strikingly opti-mized.Finally,the existing challenges and future directions in this booming research field are outlined.This review will exert the significant guidance for future design and purposeful fabrication of advanced laser-induced nano-materials with appealing properties for advanced ESCDs and beyond.