The tremendous potential of triboelectric generators-TENGs for converting mechanical energy into electrical energy places them as one of the most promising energy harvesting technologies. In this work, the fabrication...The tremendous potential of triboelectric generators-TENGs for converting mechanical energy into electrical energy places them as one of the most promising energy harvesting technologies. In this work, the fabrication of enhanced performance TENGs using Ag octahedron nano-assemblies on ITO as electrodes significantly increases the electric charge collection of the induced tribocharges. Thereby, nanostructured electrical contacts coated with Ag macroscale nano-assemblies with octahedral features were obtained by the electrodeposition technique on flexible PET/ITO substrates. Consequently, the nanostructured triboelectric generator-TENG exhibited 65 times more maximum output power, and almost 10 times more open circuit output voltage than that of a TENG with non-nanostructured contacts passing from μW to m W capabilities, which was attributed to the increment of intrinsic interface states due to a higher effective contact area in the former. Likewise, output performances of TENGs also displayed an asymptotic behavior on the output voltage as the operating frequency of the mechanical oscillations increased, which is attributed to a decrement in the internal impedance of the device with frequency. Furthermore, it is shown that the resulting electrical output power can successfully drive low power consumption electronic devices. On that account, the present research establishes a promising platform which contributes in an original way to the development of the TENGs technology.展开更多
Layered double hydroxides(LDHs), as a class of typical two-dimensional materials, have sparked increasing interest in the field of energy storage and conversion. In the last few years, the research about LDHs as elect...Layered double hydroxides(LDHs), as a class of typical two-dimensional materials, have sparked increasing interest in the field of energy storage and conversion. In the last few years, the research about LDHs as electrode active materials has seen much progress in terms of structure designing, material synthesis, properties tailoring, and applications. In this review, we focus on the integrated nanostructural electrodes(INEs) construction using LDH materials, including pristine LDH-INEs, hybrid LDH-INEs, and LDH derivativeINEs, as well as the performance advantages and applications of LDH-INEs.Moreover, in the final section, the insights about challenges and prospective in this promising research field were concluded, especially in regulation of intrinsic activity and uncovering of structure–activity relationship, which would push forward the development of this fast-growing field.展开更多
For the ever-growing demand of advanced lithium-ion batteries, it is highly desirable to grow self-supported micro-/nanostructured arrays on metal substrates as electrodes directly. The in-situ growth of electrode mat...For the ever-growing demand of advanced lithium-ion batteries, it is highly desirable to grow self-supported micro-/nanostructured arrays on metal substrates as electrodes directly. The in-situ growth of electrode materials on the conducting substrates greatly simplifies the electrode fabrication process without using any binders or conductive additives. Moreover, the well-ordered arrays closely connected to the current collectors can provide direct electron transport pathways and enhanced accommodation of strains arisen from lithium ion lithiation/delithiation. This article summarizes our recent work on design and construction of lithium-ion battery electrodes on metal substrates. An aqueous solution-based process and a microemulsion-mediated process have been respectively presented to control the kinetic and thermodynamic processes for the micro-/nanostructured array growth on metal substrates, with particular attention to CuO nanorod arrays and microcog arrays successfully prepared on Cu foil substrates. They can be directly used as binder-free electrodes to build advanced lithium-ion batteries with high energy, high safety and high stability.展开更多
Electrification has great impacts on our modern society.To electrify future transportation,state-of-the-art lithium-ion batteries(LIBs)are still not sufficient in multiple aspects including cost,energy density,lifespa...Electrification has great impacts on our modern society.To electrify future transportation,state-of-the-art lithium-ion batteries(LIBs)are still not sufficient in multiple aspects including cost,energy density,lifespan,and safety.To this end,next-generation high-energy LIBs and beyond are highly regarded.In this regard,high-capacity anodes are undergoing intensive investigation,such as silicon,SnO_(2),and lithium metal.However,such anode materials are commonly experiencing large volume changes and related issues,which are reflected on mechanical degradation,capacity fading,low efficiency,and unsatisfactory lifetime.To address these challenges,many technical strategies have been investigated.In the past decade,atomic layer deposition(ALD)has emerged as a new promising technique enabling atomic-scale surface modification and nanoscale design of high-capacity anodes for high performance.In this review,recent ALD studies on developing high-capacity anodes for LIBs and beyond are thoroughly summarized.In addition,ALD strategies and their effectiveness in pursing high-energy LIBs and beyond are discussed.Particularly,we highlighted the latest advances of ALD for addressing the notorious issues associated with Li metal anodes.It is expected that this work will promote the applications of ALD in new battery systems.展开更多
Solid oxide cells(SOCs)are pivotal for renewable energy storage and conversion.They operate in two key modes:solid oxide electrolysis cells(SOECs)efficiently transform electrical power into fuel,while solid oxide fuel...Solid oxide cells(SOCs)are pivotal for renewable energy storage and conversion.They operate in two key modes:solid oxide electrolysis cells(SOECs)efficiently transform electrical power into fuel,while solid oxide fuel cells(SOFCs)convert fuel back into power.Conventional SOC fabrication relies on high-temperature sintering,leading to microstructured components that limit performance at reduced operating temperatures.Nanostructured electrodes and electrolytes are essential to enhance electrochemical activity(e.g.,oxygen reduction and hydrogen evolution reactions)and ion transport rates at low temperatures,thereby addressing challenges such as material degradation and sealing reliability under high-temperature operation.This review systematically examines advanced nanofabrication techniques for SOCs,including infiltration,exsolution,electrospinning,template-assisted synthesis,selfassembly,vapor deposition,high-pressure compaction,and sintering-free direct assembly.For each method,we analyze the process-microstructure-performance relationships,alongside comparative assessments of cost,scalability,complexity,and technological maturity.Furthermore,we critically evaluate the current limitations and future prospects of SOC nanofabrication,providing insights for next-generation energy technologies.展开更多
Morphological control is an effective approach to enhance the rate performance of nanostructured electrode materials,offering a promising solution for alleviating energy concerns.We have utilized a seed-mediated growt...Morphological control is an effective approach to enhance the rate performance of nanostructured electrode materials,offering a promising solution for alleviating energy concerns.We have utilized a seed-mediated growth method to synthesize hexagonal djurleite(Cu_(1.94)S)nanoplates and nanoflowers under N_(2) and air,respectively.The influence of the morphology on the ion interaction has been investigated in the storage process through half-cell electrochemical energy storage.Cu_(1.94)S nanoplates performed a higher specific capacity of 193 mAh g^(−1) at a high rate of 8 A g^(−1) than nanoflowers and showed excellent cycle stability over 4,000 cycles with capacity retention of 80.8%.The relationship between morphology and electrochemical performance was explored through further electrochemical characterization.It is found that the stacking of hexagonal surfaces of nanoplates increases the contact area of the electrode material and reduced resistance,leading to faster ion migration and a more complete redox process,ultimately contributing to a higher specific capacity.Our study has enhanced the understanding of structure-property relationships for electrode material,providing an insightful approach for the preparation of electrode materials suitable for ultrafast charge and discharge.展开更多
基金Consejo Nacional de Ciencia y Tecnología of México (CONACYT) for her Doctoral scholarshippostgraduate studies department at CIMAVMonterrey for fellowship support。
文摘The tremendous potential of triboelectric generators-TENGs for converting mechanical energy into electrical energy places them as one of the most promising energy harvesting technologies. In this work, the fabrication of enhanced performance TENGs using Ag octahedron nano-assemblies on ITO as electrodes significantly increases the electric charge collection of the induced tribocharges. Thereby, nanostructured electrical contacts coated with Ag macroscale nano-assemblies with octahedral features were obtained by the electrodeposition technique on flexible PET/ITO substrates. Consequently, the nanostructured triboelectric generator-TENG exhibited 65 times more maximum output power, and almost 10 times more open circuit output voltage than that of a TENG with non-nanostructured contacts passing from μW to m W capabilities, which was attributed to the increment of intrinsic interface states due to a higher effective contact area in the former. Likewise, output performances of TENGs also displayed an asymptotic behavior on the output voltage as the operating frequency of the mechanical oscillations increased, which is attributed to a decrement in the internal impedance of the device with frequency. Furthermore, it is shown that the resulting electrical output power can successfully drive low power consumption electronic devices. On that account, the present research establishes a promising platform which contributes in an original way to the development of the TENGs technology.
基金supported by the National Natural Science Foundation of China(21601011 and 21521005)the National Key Research and Development Programme(2017YFA0206804)+1 种基金the Fundamental Research Funds for the Central Universities(buctrc201506 and buctylkxj01)the Higher Education and HighQuality and World-Class Universities(PY201610)
文摘Layered double hydroxides(LDHs), as a class of typical two-dimensional materials, have sparked increasing interest in the field of energy storage and conversion. In the last few years, the research about LDHs as electrode active materials has seen much progress in terms of structure designing, material synthesis, properties tailoring, and applications. In this review, we focus on the integrated nanostructural electrodes(INEs) construction using LDH materials, including pristine LDH-INEs, hybrid LDH-INEs, and LDH derivativeINEs, as well as the performance advantages and applications of LDH-INEs.Moreover, in the final section, the insights about challenges and prospective in this promising research field were concluded, especially in regulation of intrinsic activity and uncovering of structure–activity relationship, which would push forward the development of this fast-growing field.
基金Supported by the National Natural Science Foundation of China(NSFC Grants21176054 and 21271058)
文摘For the ever-growing demand of advanced lithium-ion batteries, it is highly desirable to grow self-supported micro-/nanostructured arrays on metal substrates as electrodes directly. The in-situ growth of electrode materials on the conducting substrates greatly simplifies the electrode fabrication process without using any binders or conductive additives. Moreover, the well-ordered arrays closely connected to the current collectors can provide direct electron transport pathways and enhanced accommodation of strains arisen from lithium ion lithiation/delithiation. This article summarizes our recent work on design and construction of lithium-ion battery electrodes on metal substrates. An aqueous solution-based process and a microemulsion-mediated process have been respectively presented to control the kinetic and thermodynamic processes for the micro-/nanostructured array growth on metal substrates, with particular attention to CuO nanorod arrays and microcog arrays successfully prepared on Cu foil substrates. They can be directly used as binder-free electrodes to build advanced lithium-ion batteries with high energy, high safety and high stability.
基金supported in part by the Natural Science Foundation of China(51802150,51571111,and 51721001)Jiangsu Province(BK20170645,BK20201087)
文摘Electrification has great impacts on our modern society.To electrify future transportation,state-of-the-art lithium-ion batteries(LIBs)are still not sufficient in multiple aspects including cost,energy density,lifespan,and safety.To this end,next-generation high-energy LIBs and beyond are highly regarded.In this regard,high-capacity anodes are undergoing intensive investigation,such as silicon,SnO_(2),and lithium metal.However,such anode materials are commonly experiencing large volume changes and related issues,which are reflected on mechanical degradation,capacity fading,low efficiency,and unsatisfactory lifetime.To address these challenges,many technical strategies have been investigated.In the past decade,atomic layer deposition(ALD)has emerged as a new promising technique enabling atomic-scale surface modification and nanoscale design of high-capacity anodes for high performance.In this review,recent ALD studies on developing high-capacity anodes for LIBs and beyond are thoroughly summarized.In addition,ALD strategies and their effectiveness in pursing high-energy LIBs and beyond are discussed.Particularly,we highlighted the latest advances of ALD for addressing the notorious issues associated with Li metal anodes.It is expected that this work will promote the applications of ALD in new battery systems.
基金financially supported by Moganshan Institute ZJUT,Deqing,Zhejiang,China,and the Australian Research Council through Huanting Wang's Australian Laureate Fellowship(project no.FL200100049).
文摘Solid oxide cells(SOCs)are pivotal for renewable energy storage and conversion.They operate in two key modes:solid oxide electrolysis cells(SOECs)efficiently transform electrical power into fuel,while solid oxide fuel cells(SOFCs)convert fuel back into power.Conventional SOC fabrication relies on high-temperature sintering,leading to microstructured components that limit performance at reduced operating temperatures.Nanostructured electrodes and electrolytes are essential to enhance electrochemical activity(e.g.,oxygen reduction and hydrogen evolution reactions)and ion transport rates at low temperatures,thereby addressing challenges such as material degradation and sealing reliability under high-temperature operation.This review systematically examines advanced nanofabrication techniques for SOCs,including infiltration,exsolution,electrospinning,template-assisted synthesis,selfassembly,vapor deposition,high-pressure compaction,and sintering-free direct assembly.For each method,we analyze the process-microstructure-performance relationships,alongside comparative assessments of cost,scalability,complexity,and technological maturity.Furthermore,we critically evaluate the current limitations and future prospects of SOC nanofabrication,providing insights for next-generation energy technologies.
基金support from the National Natural Science Foundation of China(22175039 and 22088101)the National Key Research and Development Program of China(2023YFA1507603)the Key Basic Research Program of Science and Technology Commission of Shanghai Municipality(22JC1410200).
文摘Morphological control is an effective approach to enhance the rate performance of nanostructured electrode materials,offering a promising solution for alleviating energy concerns.We have utilized a seed-mediated growth method to synthesize hexagonal djurleite(Cu_(1.94)S)nanoplates and nanoflowers under N_(2) and air,respectively.The influence of the morphology on the ion interaction has been investigated in the storage process through half-cell electrochemical energy storage.Cu_(1.94)S nanoplates performed a higher specific capacity of 193 mAh g^(−1) at a high rate of 8 A g^(−1) than nanoflowers and showed excellent cycle stability over 4,000 cycles with capacity retention of 80.8%.The relationship between morphology and electrochemical performance was explored through further electrochemical characterization.It is found that the stacking of hexagonal surfaces of nanoplates increases the contact area of the electrode material and reduced resistance,leading to faster ion migration and a more complete redox process,ultimately contributing to a higher specific capacity.Our study has enhanced the understanding of structure-property relationships for electrode material,providing an insightful approach for the preparation of electrode materials suitable for ultrafast charge and discharge.
