首页|Vacancy defect MoSeTe embedded in N and F co-doped carbon skeleton for high performance sodium ion batteries and hybrid capacitors

Vacancy defect MoSeTe embedded in N and F co-doped carbon skeleton for high performance sodium ion batteries and hybrid capacitors

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Sodium-ion batteries(SIBs)and hybrid capacitors(SIHCs)have garnered significant attention in energy storage due to their inherent advantages,including high energy density,cost-effectiveness,and enhanced safety.However,developing high-performance anode materials to improve sodium storage performance still remains a major challenge.Here,a facile one-pot method has been developed to fabricate a hybrid of MoSeTe nanosheets implanted within the N,F co-doped honeycomb carbon skeleton(MoSeTe/N,F@C).Experimental results demonstrate that the incorporation of large-sized Te atoms into MoSeTe nanosheets enlarges the layer spacing and creates abundant anion vacancies,which effectively facilitate the inser-tion/extraction of Na+and provide numerous ion adsorption sites for rapid surface capacitive behavior.Additionally,the heteroatoms N,F co-doped honeycomb carbon skeleton with a highly conductive net-work can restrain the volume expansion and boost reaction kinetics within the electrode.As anticipated,the MoSeTe/N,F@C anode exhibits high reversible capacities along with exceptional cycle stability.When coupled with Na3V2(PO4)3@C(NVPF@C)to form SIB full cells,the anode delivers a reversible specific capacity of 126 mA h g-1 after 100 cycles at 0.1 A g-1.Furthermore,when combined with AC to form SIHC full cells,the anode demonstrates excellent cycling stability with a reversible specific capacity of 50 mA h g-1 keeping over 3700 cycles at 1.0 A g-1.In situ XRD,ex situ TEM characterization,and theo-retical calculations(DFT)further confirm the reversibility of sodium storage in MoSeTe/N,F@C anode materials during electrochemical reactions,highlighting their potential for widespread practical applica-tion.This work provides new insights into the promising utilization of advanced transition metal dichalcogenides as anode materials for Na+-based energy storage devices.

MoSeTeN,F co-doped honeycomb carbon skeletonSodium-ion batteriesSodium-ion hybrid capacitor

Dehui Yang、Wentao Guo、Fei Guo、Jiaming Zhu、Gang Wang、Hui Wang、Guanghui Yuan、Shenghua Ma、Beibei Wang

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State Key Laboratory of Photon-Technology in Western China Energy,International Collaborative Center on Photoelectric Technology and Nano Functional Materials,Institute of Photonics & Photon-Technology,Northwest University,Xi'an 710127,Shannxi,China

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry(Ministry of Education),College of Chemistry & Materials Science,Northwest University,Xi'an 710127,Shannxi,China

School of Chemistry and Chemical Engineering,Ankang Research Centre of New Nano-materials Science and Technology,Shaanxi University Innovation Research Institute of Advanced Energy Storage Materials and Battery Technology for Future Industrialization,Ankang University,Ankang 725000,Shannxi,China

国家自然科学基金国家自然科学基金中国博士后科学基金Science Foundation of Shaanxi ProvinceScience Foundation of Shaanxi ProvinceIndustrial Projects Foundation of Ankang Science and Technology BureauPlatform Construction Projects and Technology Service Teams of Ankang UniversityPlatform Construction Projects and Technology Service Teams of Ankang University

52002320519722672022M7125742022GY-3722021GY-153AK2020-GY02-22021AYPT122022TD07

2024

10.1016/j.jechem.2023.11.027

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.90(3)
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