Stretchable energy storage devices are essential for the development of stretchable electronics that can maintain their electronic performance while sustain large mechanical strain. In this context, stretchable superc...Stretchable energy storage devices are essential for the development of stretchable electronics that can maintain their electronic performance while sustain large mechanical strain. In this context, stretchable supercapacitors(SSCs) are regarded as one of the most promising power supply in stretchable electronic devices due to their high power densities, fast charge-discharge capability, and modest energy densities. Carbon materials, including carbon nanotubes, graphene, and mesoporous carbon, hold promise as electrode materials for SSCs for their large surface area,excellent electrical, mechanical, and electrochemical properties.Much effort has been devoted to developing stretchable,carbon-based SSCs with different structure/performance characteristics, including conventional planar/textile, wearable fiber-shaped, transparent, and solid-state devices with aesthetic appeal. This review summarizes recent advances towards the development of carbon-based SSCs. Challenges and important directions in this emerging field are also discussed.展开更多
A facile and efficient synthesis route for the preparation of Tm-Fe-Co-Ni-Mn multicomponent alloy films was reported.Here the films with nanostructures were successfully synthesized by electrodeposition at room temper...A facile and efficient synthesis route for the preparation of Tm-Fe-Co-Ni-Mn multicomponent alloy films was reported.Here the films with nanostructures were successfully synthesized by electrodeposition at room temperature.By changing the electrodeposition parameters,such as the deposition potential,deposition time,and the substrates,the styles of the nanostructures and surface morphologies of the deposits could be well controlled.The energy dispersive spectrometer （EDS） indicated that the five elements were co-deposited.The result of XRD suggested that the film was amorphous.The as-deposited alloys showed soft magnetic and superparamagnetic behavior,and the magnetic particles were frozen step by step in the freezing process.展开更多
作为锂离子电池的理想替代品,钠离子电池因具有能源储备丰富、成本低廉等优点而受到人们的广泛关注。柔性便携式电子产品的发展亟需柔性储能器件的研制。因此,发展一种廉价、高性能的柔性钠离子电池负极材料成了科研工作者的共同目标。...作为锂离子电池的理想替代品,钠离子电池因具有能源储备丰富、成本低廉等优点而受到人们的广泛关注。柔性便携式电子产品的发展亟需柔性储能器件的研制。因此,发展一种廉价、高性能的柔性钠离子电池负极材料成了科研工作者的共同目标。在此项工作中,我们通过简单的水热合成和热还原法发展了一种以柔性碳布为基底,与缺氧型的Na_2Ti_3O_7纳米带(NTO)构成三维阵列结构的新型柔性钠离子电池负极材料。复合材料(R-NTO/CC)的导电性和活性位点得到提高,电化学性能也大幅提升,在200 m A·cm^(-2)的电流密度下,实现100 m Ah·cm^(-2)的面积比容量,且经过200次循环后仍保留最初电容值的80%。此外,这种电极还具有优良的倍率性能,当电流密度提高到400 m A·cm^(-2)时,仍保持69.7m Ah·cm^(-2)的面积比容量,是未引入氧空位材料的三倍之多。这种三维缺氧的电极材料可有效提高载流子浓度,缩短离子传输通道,从而大幅提升电极的电化学性能。此工作为设计合成高储钠性能的新型的负极材料提供了一种实用有效的策略。展开更多
Highly efficient,environmentally friendly,and inexpensive cathode materials have been regarded as the core elements in a wide range of rechargeable alkaline zinc batteries(RAZBs).Herein,a three-dimensional ordered mes...Highly efficient,environmentally friendly,and inexpensive cathode materials have been regarded as the core elements in a wide range of rechargeable alkaline zinc batteries(RAZBs).Herein,a three-dimensional ordered mesoporous nitrogen-doped oxygen-deficient iron trioxide nanoarray(denoted as N-Fe_(2)O_(3)−x)has been developed as a new kind of cathode material for RAZBs,with great promise.The N-Fe_(2)O_(3)−x nanoarray is prepared via a unique high-isostatic pressure-assisted nanocasting process and N_(2) plasma activation,which endow the N-Fe_(2)O_(3)−x material with highly effective areas,abundant active sites,fast electrolyte diffusion channels,and shortened charge transport pathways.Consequently,a high capacity of 288 mA h g^(−1)(at 1.0 A g^(−1))and an excellent energy density of 135 W h kg^(−1)(based on the weights of N-Fe_(2)O_(3)−x)are achieved for the Zn battery composed of N-Fe_(2)O_(3)−x//Zn by using the optimized N-Fe_(2)O_(3)−x material as the cathode and Zn metal as the anode.Moreover,the rechargeable Zn battery possesses excellent stability;at 10 A g^(−1),the battery retains 73%capacitance after 1000 cycles.The excellent electrochemical performance of the N-Fe_(2)O_(3)−x//Zn battery is much higher than those of the current Zn batteries based on iron oxides and hydroxides.This is the first example of using iron trioxide as a cathode for RAZBs,which may be of intense interest to later researchers.展开更多
基金supported by the National Natural Science Foundation of China(21403306,2141101037 and 21273290)Guangdong Natural Science Funds for Distinguished Young Scholar(2014A030306048)the Natural Science Foundation of Guangdong Province(2014B010123002,2014B050505001,2015B010118002 and 2015B090927007)
文摘Stretchable energy storage devices are essential for the development of stretchable electronics that can maintain their electronic performance while sustain large mechanical strain. In this context, stretchable supercapacitors(SSCs) are regarded as one of the most promising power supply in stretchable electronic devices due to their high power densities, fast charge-discharge capability, and modest energy densities. Carbon materials, including carbon nanotubes, graphene, and mesoporous carbon, hold promise as electrode materials for SSCs for their large surface area,excellent electrical, mechanical, and electrochemical properties.Much effort has been devoted to developing stretchable,carbon-based SSCs with different structure/performance characteristics, including conventional planar/textile, wearable fiber-shaped, transparent, and solid-state devices with aesthetic appeal. This review summarizes recent advances towards the development of carbon-based SSCs. Challenges and important directions in this emerging field are also discussed.
基金supported by the Natural Science Foundation of China (No. 21403306, and No. 2016YFA0202604)Guangdong Natural Science Funds for Distinguished Young Scholar (No. 2014A030306048)+2 种基金Pearl River S&T Nova Program of Guangzhou (No. 201610010080)Tip-top Scientif ic and Technical Innovative Youth Talents of Guangdong Special Support Program (No. 2015TQ01C205)Technology Planning Project of Guangdong Province (No. 2015B090927007)
基金Project supported by the National Natural Science Foundations of China (20873184 and 90923008)the Natural Science Foundations of Guang-dong Province (07300877 and 9251027501000002)+1 种基金the Science and Technology Planning Project of Guangdong Province (2008B010600040)the Foundations of Young Teacher Starting-up Research of Yuncheng University (YQ-2010013)
文摘A facile and efficient synthesis route for the preparation of Tm-Fe-Co-Ni-Mn multicomponent alloy films was reported.Here the films with nanostructures were successfully synthesized by electrodeposition at room temperature.By changing the electrodeposition parameters,such as the deposition potential,deposition time,and the substrates,the styles of the nanostructures and surface morphologies of the deposits could be well controlled.The energy dispersive spectrometer （EDS） indicated that the five elements were co-deposited.The result of XRD suggested that the film was amorphous.The as-deposited alloys showed soft magnetic and superparamagnetic behavior,and the magnetic particles were frozen step by step in the freezing process.
文摘作为锂离子电池的理想替代品,钠离子电池因具有能源储备丰富、成本低廉等优点而受到人们的广泛关注。柔性便携式电子产品的发展亟需柔性储能器件的研制。因此,发展一种廉价、高性能的柔性钠离子电池负极材料成了科研工作者的共同目标。在此项工作中,我们通过简单的水热合成和热还原法发展了一种以柔性碳布为基底,与缺氧型的Na_2Ti_3O_7纳米带(NTO)构成三维阵列结构的新型柔性钠离子电池负极材料。复合材料(R-NTO/CC)的导电性和活性位点得到提高,电化学性能也大幅提升,在200 m A·cm^(-2)的电流密度下,实现100 m Ah·cm^(-2)的面积比容量,且经过200次循环后仍保留最初电容值的80%。此外,这种电极还具有优良的倍率性能,当电流密度提高到400 m A·cm^(-2)时,仍保持69.7m Ah·cm^(-2)的面积比容量,是未引入氧空位材料的三倍之多。这种三维缺氧的电极材料可有效提高载流子浓度,缩短离子传输通道,从而大幅提升电极的电化学性能。此工作为设计合成高储钠性能的新型的负极材料提供了一种实用有效的策略。
基金supported by the National Natural Science Foundation for Young Scientists of China(21805316)the Natural Science Foundation of Hubei Province(2020CFB430)Hubei Provincial Department of Education(Q20192503)。
文摘Highly efficient,environmentally friendly,and inexpensive cathode materials have been regarded as the core elements in a wide range of rechargeable alkaline zinc batteries(RAZBs).Herein,a three-dimensional ordered mesoporous nitrogen-doped oxygen-deficient iron trioxide nanoarray(denoted as N-Fe_(2)O_(3)−x)has been developed as a new kind of cathode material for RAZBs,with great promise.The N-Fe_(2)O_(3)−x nanoarray is prepared via a unique high-isostatic pressure-assisted nanocasting process and N_(2) plasma activation,which endow the N-Fe_(2)O_(3)−x material with highly effective areas,abundant active sites,fast electrolyte diffusion channels,and shortened charge transport pathways.Consequently,a high capacity of 288 mA h g^(−1)(at 1.0 A g^(−1))and an excellent energy density of 135 W h kg^(−1)(based on the weights of N-Fe_(2)O_(3)−x)are achieved for the Zn battery composed of N-Fe_(2)O_(3)−x//Zn by using the optimized N-Fe_(2)O_(3)−x material as the cathode and Zn metal as the anode.Moreover,the rechargeable Zn battery possesses excellent stability;at 10 A g^(−1),the battery retains 73%capacitance after 1000 cycles.The excellent electrochemical performance of the N-Fe_(2)O_(3)−x//Zn battery is much higher than those of the current Zn batteries based on iron oxides and hydroxides.This is the first example of using iron trioxide as a cathode for RAZBs,which may be of intense interest to later researchers.
