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Reasonable design of defect engineering in the electrode materials for sodium-ion batteries (SIBs) can significantly optimize battery performance. Here, compared with the traditional "foreign-doping" defects method, we report an innovative gamma-irradiation technique to introduce the "self-doping" defects in the popcorn hard carbon (HC). Considering the advantages of adsorption-intercalation-alloying sodium storage mechanism, the defect-rich HC-coated alloy structure (SnP@HC-γ) was integrated. Due to the high energy and strong penetrability of γ-rays, the constructed "self-doping" defect engineering effectively expands the interlayer structure of HC and forms the irregular ring structure. Simultaneously, the exposed large number of coordination unsaturated sites can accelerate the reaction kinetics on the surface. Based on the synergistic effect of the SnP@HC-γ, the composites exhibit an excellent reversible capacity of 668 mAh g at 0.1 A g in SIBs. Even, after 400 cycles at 1.0 A g, an exceptional cyclability with 88% capacity retention (430 mAh g) can be maintained. We envision that the γ-irradiation technology used in this research not only overturns the general perception that "self-doping" defects will reduce performance, but also provides reliable technical support for large-scale construction of high-defect, high-capacity and stable sodium-ion anode materials.
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http://dx.doi.org/10.1016/j.jcis.2021.02.060 | DOI Listing |
Angew Chem Int Ed Engl
December 2024
Qingdao University of Science and Technology, State Key Laboratory Base of Eco-Chemical Engineering College of Chemical Engineering, Qingdao, CHINA.
Electrocatalytic reduction of NO3- is a green and sustainable method that not only helps to treat industrial pollutants in wastewater, but also produces valuable chemicals. However, the slow dynamics of the proton-coupled electron transfer process results in a high barrier and low conversion efficiency. In this work, the Se-deficient FeSe2/Fe3O4 heterojunction was synthesized, which showed excellent electrochemical performance in 0.
View Article and Find Full Text PDFNano Lett
December 2024
Institute of New Energy Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
The interaction of defects has been proven effective in regulating the mechanical properties of structural materials, while its influence on the physicochemical performance of functional materials has been rarely reported. Herein, we synthesized Ag nanorods with dense stacking faults and investigated how the defect interaction affects the catalytic properties. We found that the stacking faults can couple with each other to form a unique structure of opposite atoms with extortionately high tensile strain.
View Article and Find Full Text PDFJ Microencapsul
December 2024
Department of Aircraft Airframe Engine Maintenance, Kapadokya University, Nevşehir, Turkey.
This study aimed to develop silver nanoparticles embedded in poly(ricinoleic acid)-poly(methyl methacrylate)-poly(ethylene glycol) (AgNPsPRici-PMMA-PEG) nanoparticles (NPs) containing caffeic acid (Caff) and tetracycline hydrochloride (TCH) for treating infections and cancer in bone defects. The block copolymers were synthesised via free radical polymerisation. NPs were prepared using the solvent evaporation method and characterised by FTIR, HNMR, SEM, DSC, TGA, and DLS.
View Article and Find Full Text PDFFood Chem
December 2024
Zhejiang University, College of Biosystems Engineering and Food Science, The Rural Development Academy, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Agro-Products Postharvest Handling of Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory for Agri-Food Processing, Zhejiang University, Hangzhou 310058, China. Electronic address:
Fluctuations in energy status are critical physiological factors influencing postharvest fruit quality. However, the role of autophagy, a stress-resistant biological process, in regulating postharvest fruit energy status remains unclear. In this study, we treated strawberry fruit with the autophagy inhibitor hydroxychloroquine (HCQ) to investigate the role of autophagy in maintaining energy status.
View Article and Find Full Text PDFAdv Healthc Mater
December 2024
Department of Vascular Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China.
Biomaterial-assisted therapeutic strategies enable precise modulation to direct endogenous cellular responses and harness regenerative capabilities for nerve repair. However, achieving effective cellular engagement during nerve remodeling remains challenging. Herein, a novel composite nerve guidance conduit (NGC), the GelMA/PLys@PDA-Fe@PLCL conduit is developed by combining aligned poly(l-lactide-co-caprolactone) (PLCL) nanofibers modified with polydopamine (PDA), ferrous iron (Fe⁺), and polylysine (PLys) with aligned methacrylate-anhydride gelatin (GelMA) hydrogel nanofibers.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!