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Novel design and synthesis of 1D bamboo-like CNTs@Sn_(4)P_(3)@C coaxial nanotubes for long-term sodium ion storage

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Green energy & Environment 2022年第6期7卷 1199-1205页

作者： Qianyu Zhang Yuling Xu Lifeng Qiu Axue Liu Rui Wang Longhai Zhang Chaofeng Zhang Yan-Jie Wang Jiujun Zhang Engineering Research Center of Alternative energy materials&Devices Ministry of EducationCollege of Materials Science and EngineeringSichuan UniversityChengdu610064China School of materials Science and Engineering Dongguan University of TechnologyDongguanGuangdong523808China Institute for Sustainable energy/College of Sciences Shanghai UniversityShanghai200444China School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei230009China

In this work,a novel bamboo-like carbon nanotubes@Sn4P3@carbon(BLCNTs@Sn_(4)P_(3)@C)coaxial nanotubes are designed and prepared using a newly developed hydrothermal method followed by a phophidation *** prepared Sn_(4)P_(3) nanoparticles are uniformly coated and wrapped on the one-dimensional(1D)bamboo-like CNTs,which is covered by a uniform carbon layer to form a sandwich-like structure with Sn_(4)P_(3) in *** inner CNT and outer carbon can effectively maintain the structural stability and serve as the good electron ***,the outer carbon coating layer can effectively keep BLCNTs@Sn_(4)P_(3)@C nanotubes separate each other,preventing aggregation of Sn_(4)P_(3) during charge/discharge when this material is used as anode for sodium ion *** anode of BLCNTs@Sn_(4)P_(3)@C shows excellent reversible capacity and a long cycling of over 2000 *** unique design of coaxial nanotubes is greatly beneficial to the electrochemical performance of Sn_(4)P_(3) for sodium ion storage.

关键词： Bamboo-like coaxial nanotubes Sn_(4)P_(3) Sodium ion batteries Anode

Scalable synthesis of N-doped Si/G@voids@C with porous structures for high-performance anode of lithium-ion batteries

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Rare Metals 2023年第12期42卷 4091-4102页

作者： Lei Wang Yan Jiang Shao-Yuan Li Xiu-Hua Chen Feng-Shuo Xi Xiao-Han Wan Wen-Hui Ma Rong Deng Faculty of Metallurgical and energy Engineering State Key Laboratory of Complex Nonferrous Metal Resources Clean UtilizationKunming University of Science and TechnologyKunming 650093China School of materials Science and Engineering Yunnan UniversityKunming 650091China School of Science and Technology Pu'erUniversityPu'er 665000China School of Photovoltaic and Renewable energy Engineering(SPREE) University of New South WalesSydney 2052Australia

The co-utilization of silicon(Si) and graphite(G) has been considered as the preferred strategy to achieve high energy density anode materials,but the effective synergistic integration of Si and graphite is still a challenge and it is necessary to find a scheme to accommodate the large-scale production of Si/graphite *** this work,silicon cutting waste from the photovoltaic industry was used as raw material,mixed with graphite,pitch,and polyvinylpyrrolidone,and subjected to high-energy ball *** mixture was then heated in an Ar atmosphere for the carbon coating,and the resulting Si/graphite/carbon(Si/G/C) composite was etched to remove the thicker SiOx layer formed on the Si surface to allow the pores between the Si and the carbon matrix to obtain Si@voids/G@*** from the integrated structural design and the significantly enhanced electronic conductivity,the Si/G@voids@C composite exhibited the first dischargespecific capacity of 2530 mAh·g^(-1) with an initial coulombic efficiency(ICE) of 86.7%,and the remaining capacity exceeded 1000 mAh·g^(-1) after 550 cycles at 1.5A·g^(-1).Notably,full lithium-ion batteries with a Si/G@voids@C anode and LiFePO_4 cathode delivered a stable capacity of 140 mAh·g^(-1).The synthesis method is facile and cost-effective,providing an integration strategy for Si and G with a potential scheme for large-scale commercial applications.

关键词： Silicon/graphite anodes Surface coating Integration strategy Silicon cutting waste High-energy ball milling Lithium-ion battery(LIB)

Microstructure and properties of Ag/SnO2 functional material manufactured by selective laser melting

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Nano materials Science 2019年第3期1卷 208-214页

作者： Yuanjie Zhang Bo Song Xiao Zhao Yusheng Shi State Key Laboratory of material Processing and Die & Mould Technology Huazhong University of Science and Technology

Ag/SnO2,as a promising and environment-friendly electrical contact material,is widely applied in low-voltage *** the properties of Ag/SnO2 composites is difficult to improve due to the poor distribution phases and difficult component *** this work,the Ag/SnO2 composites are prepared by selective laser *** get better performance,Ag/SnO2 composites with different energy density were *** microstructure was observed by field emission scanning electron *** addition,reinforced SnO2 phase was characterized by X-ray diffraction and transmission electron *** results indicated that the microstructure,relative density and hardness of are influenced by energy density,while Ag/SnO2 composites with homogeneous microstructure,high relative density,higher hardness and lower electrical resistivity can be obtained by proper energy density(E?68 J/mm^3).

关键词： Selective laser melting Ag/SnO2 Composites Electrical contact material

3D flower-like mesoporous Bi_(4)O_(5)I_(2)/MoS_(2)Z-scheme heterojunction with optimized photothermal-photocatalytic performance

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Green energy & Environment 2023年第1期8卷 200-212页

作者： Sijia Song Zipeng Xing Ke Wang Huanan Zhao Peng Chen Zhenzi Li Wei Zhou Department of Environmental Science School of Chemistry and Materials ScienceKey Laboratory of Functional Inorganic Material ChemistryMinistry of Education of the People's Republic of ChinaHeilongjiang UniversityHarbin150080China Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)JinanShandong250353China

3D flower-like hierarchical mesoporous Bi_(4)O_(5)I_(2)/MoS_(2)Z-scheme layered heterojunction photocatalyst was fabricated by oil bath and hydrothermal *** heterojunction with narrow band gap of~1.95 eV extended the photoresponse to near-infrared region,which showed obvious photothermal effect due to the introduction of MoS_(2) with broad spectrum ***_(2) nanosheets were anchored onto the surface of flower-like hierarchical mesoporous Bi_(4)O_(5)I_(2) nanosheets,thereby forming efficient layered heterojunctions,the solar-driven photocatalytic efficiency in degradation of highly toxic dichlorophenol and reduction of hexavalent chromium was improved to 98.5%and 99.2%,which was~4 and 7 times higher than that of the pristine Bi_(4)O_(5)I_(2),*** addition,the photocatalytic hydrogen production rate reached 496.78 μmol h^(-1)g^(-1),which was~6 times higher than that of the pristine Bi_(4)O_(5)I_(2).The excellent photocatalytic performance can be ascribed to the promoted photothermal effect,as well as,the formation of compact Z-scheme layered *** 3D flower-like hierarchical mesoporous structure provided adequate surface active-sites,which was conducive to the mass ***,the high stability of the prepared photocatalyst further promoted its potential practical *** strategy also provides new insights for fabricating layered Zscheme heterojunctions photocatalysts with highly photothermal-photocatalytic efficiency.

关键词： Photocatalysis Z-scheme heterojunction Bi4O5I2 MoS2 Photothermal effect

Diffusionless-Like Transformation Unlocks Pseudocapacitance with Bulk Utilization: Reinventing Fe_(2)O_(3) in Alkaline Electrolyte

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energy & Environmental materials 2023年第1期6卷 145-154页

作者： Taowen Dong Wencai Yi Ting Deng Tingting Qin Xianyu Chu He Yang Lirong Zheng Seung Jo Yoo Jin-Gyu Kim Zizhun Wang Yan Wang Wei Zhang Weitao Zheng State Key Laboratory of Automotive Simulation and Control and School of Materials Science&EngineeringKey Laboratory of Automobile Materials MOEand Electron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130012China Laboratory of High Pressure Physics and material Science(HPPMS) School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Electron Microscopy Research Center Korea Basic Science InstituteDaejeon 34133South Korea Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China IKERBASQUE Basque Foundation for ScienceBilbao 48013Spain

energy density can be substantially raised and even maximized if the bulk of an electrode material is fully *** metal oxides based on conversion reaction mechanism are the imperative choice due to either constructing nanostructure or intercalation pseudocapacitance with their intrinsic ***,the fully bulk utilization of transition metal oxides is hindered by the poor understanding of atomic-level conversion reaction mechanism,particularly it is largely missing at clarifying how the phase transformation(conversion reaction)determines the electrochemical performance such as power density and cyclic ***,α-Fe_(2)O_(3) is a case provided to claim how the diffusional and diffusionless transformation determine the electrochemical behaviors,as of its conversion reaction mechanism with fully bulk utilization in alkaline ***,the discharge productα-FeOOH diffusional from Fe(OH)2 is structurally identified as the atomic-level arch criminal for its cyclic stability deterioration,whereas the counterpartδ-FeOOH is theoretically diffusionless-like,unlocking the full potential of the pseudocapacitance with fully bulk ***,such pseudocapacitance,in proof-of-concept and termed as conversion pseudocapacitance,is achieved via diffusionless-like *** work not only provides an atomic-level perspective to reassess the potential electrochemical performance of the transition metal oxides electrode materials based on conversion reaction mechanism but also debuts a new paradigm for pseudocapacitance.

关键词： bulk utilization,conversion pseudocapacitance diffusionless transformation Fe_(2)O_(3) phase transformation

High efficiently harvesting visible light and vibration energy in(1−x)AgNbO_(3)-xLiTaO_(3) solid solution around antiferroelectric-ferroelectric phase boundary for dye degradation

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Journal of Advanced Ceramics 2022年第10期11卷 1641-1653页

作者： Tufeng HE Zhenzhu CAO Guorong LI Yanmin JIA Biaolin PENG College of Chemical Engineering Inner Mongolia University of TechnologyHohhot 010051China Key Laboratory of Inorganic Function material and Device Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China School of Science Xi’an University of Posts&TelecommunicationsXi’an 710121China School of Advanced materials and Nanotechnology Xidian UniversityXi’an 710126China

Simultaneously employing light and vibration energy by piezoelectric material to realize environmental remediation is an advanced oxidation *** niobate(AgNbO_(3))is a visible light driven photocatalyst for the removal of organic ***,the high recombination rate of photo-generated electrons and holes suppresses its photocatalytic *** potential excited by vibration can facilitate the separation of light induced ***,AgNbO_(3) is an *** this work,distinct photo-/vibration-bi-catalysis has been achieved in ferroelectric(1−x)AgNbO_(3)-xLiTaO_(3) solid *** results show that ~96% Rhodamine B(RhB)can be decomposed under the bi-excitation of ultrasound and visible light within 120 min with 0.95AgNbO_(3)-0.05LiTaO_(3) *** synergy effect from efficient visible light excitation and enhanced separation of the photo-induced charges from the electric field by the mechanical strain results in the distinct decomposition performance of catalysts.

关键词： piezoelectric effect photocatalysis visible light decomposition

Refinement of structural characteristics and supercapacitor performance of MnO2 nanosheets via CTAB-assisted electrodeposition

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Progress in Natural Science:materials International 2023年第6期33卷 881-890页

作者： Ziming Wang Hanbo Wang Dongyu Pei Sheng Wan Zhitian Fan Mingrui Yu Haiyan Lu College of Chemistry Jilin University Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education Jilin University Zhuhai Zhongli New energy Sci-Tech Co. Ltd.

MnO2stands out as a highly promising material for electrochemical capacitors due to its impressive theoretical capacitance,cost-effectiveness,eco-friendliness,and abundant natural ***,its inherent low conductivity and structural fragility result in restricted specific capacitance and a shortened cycle life,posing a notable obstacle to its *** the introduction of CTAB(cetyltrimethylammonium bromide),we successfully tailored the surface morphology of the electrode material,yielding a robust and highly conductive layered MnO2electrode *** MnO2/CTAB composite synthesized through a simple electrodeposition method exhibits outstanding performance,achieving a specific capacitance of 665 F g-1at 1 A *** after30,000 cycles,it maintains 92.13% *** performance improvement is primarily attributed to increased conductivity,and additional electrochemically active ***,the assembled MnO2/CTAB//AC capacitor(ACs) achieves a specific capacitance of 70.06 F g-1at 1 A g-1,operating at a voltage of 1.8 *** a power density of 563.36 W kg-1,it reaches an energy density of 35.21 Wh *** work provides an effective approach for high-performance electrode of supercapacitor.

关键词： Manganese dioxide CTAB Asymmetric capacitor Electrodeposition

Interlayer and intralayer co-modified flexible V_(2)CT_(X) MXene@SWCNT films for high-power Li-ion capacitors

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Journal of energy Chemistry 2023年第4期79卷 101-109页

作者： Wanli Wang Min Feng Enze Hu Zhaowei Hu Cheng Fan Huifang Li Peng Wang Xiaojun Wang Zhiming Liu College of Electromechanical Engineering Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-MaterialsQingdao University of Science&TechnologyQingdao 266061ShandongChina Qingdao Industrial energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101ShandongChina Key Laboratory of Advanced energy materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

As an emerging member of the two-dimensional(2D)material family,V_(2)CT_(X)MXene shows great potential in the application of lithium-ion capacitors(LICs)due to its unique structure and excellent electrical ***,severe nanosheets stacking and intra-layer transport barriers have limited the further development of V_(2)CT_(X)MXene-based ***,we prepared Kions and–O functional group co-modified V_(2)CT_(X)MXene(VCT-K)and further incorporated it with single-walled carbon nanotube(SWCNT),obtaining freestanding V_(2)CT_(X)composite films(VCT-K@C)with the 3D conductive ***,K+ions were introduced into V_(2)CT_(X)MXene to stabilize the interlayer structure and prevent the aggregation of nanosheets,the terminal group of–O was controllably modified on the surface of MXene to improve the Li+ions storage reversible capacities and the SWCNT acted as the bridge between MXene nanosheets to opens up the channels for ion/electron transportation in the longitudinal *** from the synergistic effect of VCT-K and SWCNT,the VCT-K@C exhibits superior reversible specific capacities of 671.8 mA h g^(-1)at 0.1 A g^(-1)and 318 mA h g^(-1)at 1.0 A g^(-1).Furthermore,the assembled LICs with VCT-K@C anode coupling activated carbon(AC)cathode deliver an outstanding power density of 19.0 kW kg^(-1)at 67.4 Wh kg^(-1),a high energy density of 140.5 Wh kg^(-1)at 94.8 W kg^(-1)and a stable capacitance retention of 86%after 6000 cycles at 10 A g^(-1).Such unique structures and excellent electrochemical properties are expected to pave the way for the large-scale application in LICs of MXene-based materials.

关键词： Interlayer and intralayer co-modification MXene SWCNT Flexible self-supported anodes Lithium-ion capacitors

Role of hydrogen in China's energy transition towards carbon neutrality target:IPAC analysis

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Advances in Climate Change Research 2023年第1期14卷 43-48页

作者： Pian-Pian XIANG Chen-Min HE Sha CHEN Wei-Yi JIANG Jia LIU Ke-Jun JIANG College of energy and Environment Beijing University of TechnologyBeijing 100124China Zhejian Carbon Neutral Innovation Institute Zhejiang University of TechnologyHangzhou 310014China Graduate School of International Studies Yonsei UniversitySeoul 03722South Korea Renm Consulting Co. Beijing 100038China energy Research Institute Chinese Academy of Macro-Economic ResearchBeijing 100038China

China announced its intention to achieve carbon neutrality by 2060 in 2020,and there is an urgent need to understand the viability of emission pathways to reach this *** study presents the IPAC modelling team's scenario analysis on China's hydrogen utilisation as a key option for carbon neutrality *** contrast to other studies,this study examines the demand for hydrogen as a feedstock and process material in the industrial sector and as a source of energy in the transportation sector in relation to China's energy system *** process of manufacturing hydrogen from carbon-free power generation was also *** finding indicates that the demand for hydrogen could reach 52.4 Mt by 2050 and that the hydrogen will come from renewable power generation and nuclear energy,increasing the demand for electricity by 1884.8 TW *** are several regions in China with abundant renewable energy and low power generation costs,which will make the hydrogen-based industry competitive in these regions after 2035.

关键词： Scenario Hydrogen Carbon neutrality targets CO_(2)mitigation China