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Strongly Coupled 2D transition metal chalcogenide-MXene-Carbonaceous Nanoribbon Heterostructures with Ultrafast Ion Transport for Boosting Sodium/Potassium Ions Storage

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Nano-Micro Letters 2021年第7期13卷 153-172页

作者： Junming Cao Junzhi Li Dongdong Li Zeyu Yuan Yuming Zhang Valerii Shulga Ziqi Sun Wei Han Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology International Center of Future ScienceCollege of PhysicsJilin UniversityChangchun 130012People’s Republic of China Centre for Materials Science School of Chemistry and PhysicsQueensland University of Technology(QUT)2 George StreetBrisbaneQLD 4001Australia Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071People’s Republic of China

Combining with the advantages of two-dimensional(2D)nanomaterials,MXenes have shown great potential in next generation rechargeable *** with other 2D materials,MXenes generally suffer severe self-agglomeration,low capacity,and unsatisfied durability,particularly for larger sodium/potassium ions,compromising their practical *** this work,a novel ternary heterostructure self-assembled from transition metal selenides(MSe,M=Cu,Ni,and Co),MXene nanosheets and N-rich carbonaceous nanoribbons(CNRibs)with ultrafast ion transport properties is designed for sluggish sodium-ion(SIB)and potassium-ion(PIB)*** from the diverse chemical characteristics,the positively charged MSe anchored onto the electronegative hydroxy(-OH)functionalized MXene surfaces through electrostatic adsorption,while the fungal-derived CNRibs bonded with the other side of MXene through amino bridging and hydrogen *** unique MXene-based heterostructure prevents the restacking of 2D materials,increases the intrinsic conductivity,and most importantly,provides ultrafast interfacial ion transport pathways and extra surficial and interfacial storage sites,and thus,boosts the high-rate storage performances in SIB and PIB *** the quantitatively kinetic analysis and the density functional theory(DFT)calculations revealed that the interfacial ion transport is several orders higher than that of the pristine MXenes,which delivered much enhanced Na+(536.3 mAh g^(−1)@0.1 A g^(−1))and K^(+)(305.6 mAh g^(−1)@1.0 A g^(−1))storage capabilities and excel-lent long-term cycling ***,this work provides new insights into 2D materials engineering and low-cost,but kinetically sluggish post-Li batteries.

关键词： Ti_(3)C_(2)T_(x)MXene Heterostructure transition metal chalcogenide Sodium and potassium-ions batteries DFT calculation

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Controlled synthesis of ferromagnetic MnSe_x particles

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Chinese Physics B 2016年第10期25卷 403-408页

作者：孙俊杰李超陈铎康仕寿刘国磊于淑云韩广兵梅良模 School of Physics and State Key Laboratory of Crystal Materials Shandong University

The MnSe(x = 1,2) nanoparticles were synthesized under hydrothermal condition,by reaction of the reduced selenium and Mnion in the presence of hydrazine and acetic *** precisely controlling the pH value of the solution,a series of MnSeparticles were *** structure and morphology of as-prepared particles were examined with x-ray diffractometer(XRD),transmission electron microscopy(TEM),and scanning electron microscopy(SEM).The average sizes of as-prepared particles varied from nanoscale to microscale with pH value ***,the nucleation and growth mechanism associated with pH values were discussed,which can be applied to the hydrothermal synthesis of metal chalcogenide in ***,the optical and magnetic properties of as-prepared particles were *** as-made particles exhibit a ferromagnetic behavior with low coercivity and remanence at room temperature.

关键词： transition metal chalcogenide phase transition controlled synthesis

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Unconventional solution-phase epitaxial growth of organic-inorganic hybrid perovskite nanocrystals on metal sulfide nanosheets

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Science China Materials 2019年第1期62卷 43-53页

作者： Zhipeng Zhang Fangfang Sun Zhaohua Zhu Jie Dai Kai Gao Qi Wei Xiaotong Shi Qian Sun Yan Yan Hai Li Haidong Yu Guichuan Xing Xiao Huang Wei Huang Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) Institute of Applied Physics and Materials Engineering University of Macao Shaanxi Institute of Flexible Electronics (SIFE) Northwestern Polytechnical University (NPU)

Epitaxial heterostructures based on organicinorganic hybrid perovskites and two-dimensional materials hold great promises in optoelectronics, but they have been prepared only via solid-state methods that restricted their practical applications. Herein, we report cubic-phased MAPbBr3(MA=CH3NH3+) nanocrystals were epitaxially deposited on trigonal/hexagonal-phased MoS2 nanosheets in solution by facilely tuning the solvation conditions. In spite of the mismatched lattice symmetry between the square MAPbBr3(001) overlayer and the hexagonal MoS2(001) substrate, two different aligning directions with lattice mismatch of as small as 1% were observed based on the domainmatching epitaxy. This was realized most likely due to the flexible nature and absence of surface dangling bonds of MoS2 nanosheets. The formation of the epitaxial interface affords an effective energy transfer from MAPbBr3 to MoS2, and as a result, paper-based photodetectors facilely fabricated from these solution-dispersible heterostructures showed better performance compared to those based on MoS2 or MAPbBr3 alone. In addition to the improved energy transfer and light adsorption, the use of MoS2 nanosheets provided flexible and continuous substrates to connect the otherwise discrete MAPbBr3 nanocrystals and achieved the better film forming ability. Our work suggests that the scalable preparation of heterostructures based on organic-inorganic hybrid perovskites and 2D materials via solution-phase epitaxy may bring about more opportunities for expanding their optoelectronic applications.

关键词： organic-inorganic hybrid perovskite transition metal chalcogenide epitaxial growth paper-based photodetector

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