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您的检索式：作者名="Yangfeng Cui"
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| 1 | Designing a photo-assisted Co-C_(3)N_(4) cathode for high performance Li-O_(2) batteries显示文摘Li-O_(2) batteries with extremely high specific energy density have been regarded as a kind of promising successor to current Li-ion batteries.However,the high charge overpotential for the decomposition of Li_(2)O_(2) discharge product reduces the energy efficiency and triggers a series of side reactions that cause the Li-O_(2) batteries to have a limited lifetime.Herein,Co-doped C_(3)N_(4)(Co-C_(3)N_(4))photocatalysts were designed by an in situ thermal evaporation method to take advantage of the photo-assisted charging technology to conquer the shortcomings of Li-O_(2) batteries encountered in the charge process.Different from the commonly used photocatalysts,the Co-C_(3)N_(4) photocatalysts perform well no matter with and without illumination,owing to the Co doping induced conductivity and electrocatalytic ability enhancement.This makes the Co-C_(3)N_(4) reduce the charge and discharge overpotentials and improve the cycling performance of Li-O_(2) batteries(from 20 to 106 cycles)without illumination.While introducing illumination,the performance can be further improved:Charge voltage reduces to 3.3 V,and the energy efficiency increases to 84.84%,indicating that the Co-C_(3)N_(4) could behave as a suitable photocathode for Li-O_(2) batteries.Besides,the low charge voltage and the continuous illumination together weaken the corrosion of the Li anode,making the long-term high-efficiency operation of Li-O_(2) batteries no longer just extravagant hope. | Renfei Cao Yangfeng Cui Gang Huang Wanqiang Liu Jianwei Liu Xinbo Zhang | 2023 | Nano Research2023，16，6： | 0 |
| 2 | Gel electrolyte via in situ polymerization to promote durable lithium-air batteries显示文摘Aprotic lithium-air batteries(LABs)have been known as the holy grail of energy storage systems due to their extremely high energy density.However,their real-world application is still hindered by the great challenges from the Li anode side,like dendrite growth and corrosion reactions,thus a pure oxygen atmosphere is usually adopted to prolong the lifetime of LABs,which is a major obstacle to fully liberate the energy density advantages of LABs.Here,a gel polymer electrolyte has been designed through in-situ polymerization of 1,3-dioxolane(DOL)by utilizing the unique semi-open nature of LABs to protect the Li anode to conquer its shortcomings,enabling the high-performance running of LABs in the ambient air.Unlike common liquid electrolytes,the in-situ formed gel polymer electrolyte could facilitate constructing a gradient SEl film with the gradual decrease of organic components from top to bottom,preventing the Li anode from dendrite growth and air-induced corrosion reactions and thus realizing durable Li repeated plating/stripping(2000h).Benefiting from the anode protection effects of the gradient SEI film,the LABs display a long lifetime of 17o cycles,paving an avenue for practical,long-term,and high-efficiency operation of LABs. | Renfei Cao Kai Chen Yangfeng Cui Jianwei Liu Wanqiang Liu Gang Huang Xinbo Zhang | 2023 | Chinese Chemical Letters2023，34，12： | 0 |
| 3 | Air Plasma-Activated Crosslinking of Low-Density Polyethylene During Melt Mixing显示文摘In this work,air plasma surface treatment followed by oxidation in an atmospheric environment was used to generate activated low-density polyethylene(LDPE)with oxygen-containing functional groups and peroxide radicals.The resulting samples were then studied by using attenuated total internal reflectance-Fourier-transform infrared spectroscopy,X-ray photoelectron spectroscopy,and the 2,2-diphenyl-1-picrylhydrazyl method.Peroxide radicals are generally considered active substances which can initiate the crosslinking reaction.Melt mixing of the surface-treated LDPE allowed activated polymer chains with peroxide radicals to initiate the crosslinking reaction,and the maximum gel fraction obtained was 4.1%.The rheological behaviors,including viscosity,storage and loss moduli,loss tangent,and Cole-Cole plots,of the slightly crosslinked LDPE were studied,and the results of tensile experiments revealed that the formation of slightly crosslinked structures can improve yield and fracture stresses without sacrificing the breakage strain. | Yangfeng Cui Zhe Ma Guiqiu Ma Jing Sheng | 2020 | Transactions of Tianjin University2020，26，1： | 0 |
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