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Innovative dual-mode device integrating capacitive desalination and solar vapor generation for high-efficiency seawater desalination

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Journal of Energy Chemistry 2025年第1期 171-179页

作者： Jiacheng Wang Zhaoyu Chen Ruduan Yuan Jiaxin Luo Ben Zhang Keju Ji Meng Li Juanxiu Xiao kuan sun National Innovation Center for Industry-Education Integration of Energy Storage Technology MOE Key Laboratory of Low-grade Energy Utilization Technologies and SystemsCollege of Energy & Power Engineering Chongqing University Xuefeng Mountain Energy Equipment Safety National Observation and Research Station CQU-NUS Renewable Energy Materials & Devices Joint Laboratory Chongqing University Southwest Technology and Engineering Research Institute Jiangsu Provincial Key Laboratory of Bionic Functional Materials College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University

Solar-driven interface evaporation with high solar-to-steam conversion efficiency has shown great potential in seawater ***,due to the influence of latent heat and condensation efficiency,the water yield from solar-driven interface evaporation remains insufficient,posing a significant challenge that requires *** this work,we designed a dual-mode high-flux seawater desalination device that combines solar-driven interface evaporation and capacitive *** utilizing coupled desalination materials exhibiting both photothermal conversion and capacitance activity,the device demonstrated photothermal evaporation rates of 1.41 and 0.97 kg m-2h-1for condensate water yield under one-sun ***,the device exhibited a salt adsorption capacity of up to48 mg g-1and a salt adsorption rate of 2.1 mg *** addition,the salt adsorption capacity increased by approximately 32% under one-sun ***,photo-enhanced capacitive desalination performance was explored through numerical simulations and theoretical *** calculations and characterizations confirmed that the defect energy levels formed by the introduction of sulfur vacancies can effectively widen the light absorption range,improve photothermal conversion performance,and stimulate more photoelectrons to participate in capacitive ***,the electron distribution state of molybdenum disulfide with sulfur vacancies and surface defect sites contributes to ion/electron transport at the solid-liquid *** work provides a novel pathway for integrating solar vapor generation with other low-energy desalination technologies.

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On the existence of the compound“Ce_(3)NbO_(7+δ)”prepared under air atmosphere

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Journal of Rare Earths 2021年第5期39卷 596-599页

作者： Shi-kuan sun Lucy M.Mottram Neil C.Hyatt Immobilisation Science Laboratory Department of Materials Science and EngineeringThe University of SheffieldSir Robert Hadfield BuildingMappin StreetS13JDUK

The solid state synthesis of the phase"Ce_(3)NbO_(7+δ)",from stoichiometric quantities of CeO_(2)and Nb_(2)O_(5),was investigated under air atmosphere,as previously described by Zhang et al.(Journal of Rare Earths,2007,25,730-733),A combination of powder X-ray diffraction,scanning electron microscopy with energy dispersive X-ray analysis,and laboratory Ce L_(3)X-ray absorption spectroscopy,demonstrates the product of the reaction to be a mixture of CeO_(2)and CeNbO_(4).These data,and reexamination of the published X-ray diffraction data of"Ce_(3)NbO_(7+δ)",are consistent with this phase in fact being CeO_(2).No evidence for the formation of a phase of composition"Ce_(3)NbO_(7+δ)"is found,by solid state synthesis under air atmosphere.

关键词： Cerium Niobium XANES XRD Ceramic Rare earths

Design strategy of phase and microstructure of Si_(3)N_(4) ceramics with simultaneously high hardness and toughness

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Journal of Advanced Ceramics 2023年第1期12卷 122-131页

作者： Shao-Jun TANG Wei-Ming GUO Shi-kuan sun Hua-Tay LIN School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006China School of Material Science and Energy Engineering Foshan UniversityFoshan 528000China

Aiming to achieve silicon nitride( Si_(3)N_(4))ceramics with high hardness and high toughness,the relationships among phase composition,microstructure,and mechanical properties of Si_(3)N_(4) ceramics prepared by spark plasma sintering(SPS)at temperatures ranging from 1500 to 1800℃were investigated in this *** stages with different phase and microstructure features were observed and ***α-βphase transformation occurs first,and the development and growth of grains lag *** the first stage,the average grain size remains basically unchanged,and the hardness maintains at a value of~20.18±0.26 GPa,despite theβ- Si_(3)N_(4) phase fraction increases from 7.67 to 57.34 wt%.Subsequently,the equiaxed grains transform into rod-like grains with a high aspect ratio via the reprecipitation process,resulting in a significant increase in the fracture toughness from 3.36±0.62 to 7.11±0.15 MPa·m^(1/2).In the second stage of sintering process,the fraction ofβ- Si_(3)N_(4) phase increases to 100.00 wt%,and the grain growth also rapidly ***,the fracture toughness increases slightly to 7.61±0.42 MPa·m^(1/2),but the hardness reduces to 16.80±0.20 *** current results demonstrate that the phase contents ofβ- Si_(3)N_(4) and the microstructure shall be carefully tailored to achieve high-performance Si_(3)N_(4) ceramics. Si_(3)N_(4) ceramics with a finegrained bimodal microstructure,consisting of the mainα-andβ-phases,can exhibit the optimized combination of hardness and toughness.

关键词： silicon nitride(Si_(3)N_(4)) phase composition microstructure hardness toughness

Optimal preparation of high-entropy boride-silicon carbide ceramics

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Journal of Advanced Ceramics 2021年第1期10卷 173-180页

作者： Yan ZHANG Shi-kuan sun Wei-Ming GUO Liang XU Wei ZHANG Hua-Tay LIN School of Electron-mechanical Engineering Guangdong University of TechnologyGuangzhou 510006China Department of Materials Science and Engineering University of SheffieldSheffield SI 3JDUK

High-entropy boride-silicon carbide(HEB-SiC)ceramics were fabricated using boridebased powders prepared from borothermal and boro/carbothermal reduction *** effects of processing routes(borothermal reduction and boro/carbothermal reduction)on the HEB powders were ***-SiC ceramics with>98%theoretical density were prepared by spark plasma sintering at 2000℃.It was demonstrated that the addition of SiC led to slight coarsening of the *** HEB-SiC ceramics prepared from boro/carbothermal reduction powders showed a fine-grained microstructure and higher Vickers9 hardness but lower fracture toughness value as compared with the same composition prepared from borothermal reduction *** results indicated that the selection of the powder processing method and the addition of SiC phase could contribute to the optimal preparation of high-entropy boride-based ceramics.

关键词： high-entropy boride-silicon ceramics borothermal reduction boro/carbothermal reduction microstructure mechanical properties

Tunable luminescent CsPb_2Br_5 nanoplatelets:applications in light-emitting diodes and photodetectors

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Photonics Research 2017年第5期5卷 473-480页

作者： CENG HAN CUNLONG LI ZHIGANG ZANG MING WANG kuan sun XIAOSHENG TANG JIHE DU Key Laboratory of Optoelectronic Technology(Ministry of Education) Chongqing University Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Ministry of Education) Chongqing University

Unlike organic–inorganic hybrid perovskites, all-inorganic cesium lead halide perovskites hold great promise for developing high-performance optoelectronic devices, owing to their improved stability. Herein, we investigate the perovskite-related CsPb_2 Br_5 nanoplatelets(NPLs) with tunable emission wavelengths via changing the reaction temperatures to 100°C, 120°C, and 140°C. Reaction temperature plays a key role in determining the shapes and thicknesses of the resulting CsPb_2 Br_5 NPLs. A higher temperature is in favor of the formation of smaller and thicker NPLs. To develop their potential applications in optoelectronic devices, green light emitting diodes(LEDs) and photodetectors based on CsPb_2 Br_5 NPLs are fabricated. The green LEDs based on CsPb_2 Br_5 NPLs synthesized at 140°C exhibit an excellent pure green emission(full width at half-maximum of <20 nm) and display a luminous efficiency of 34.49 lm∕W under an operation current of 10 m A. Moreover, the photodetector based on CsPb_2 Br_5 NPLs synthesized at 100°C has better performance with a rise time of 0.426 s, a decay time of0.422 s, and a ratio of the current(with and without irradiation) of 364%.

关键词： Cs Pb Br Tunable luminescent CsPb2Br5 nanoplatelets:applications in light-emitting diodes and photodetectors

Accelerated discovery of novel high-performance zinc-ion battery cathode materials by combining high-throughput screening and experiments

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Chinese Chemical Letters 2023年第8期34卷 315-321页

作者： Haoran Luo Jiangbin Deng Qianzhi Gou Omololu Odunmbaku kuan sun Juanxiu Xiao Meng Li Yujie Zheng MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems School of Energy and Power EngineeringChongqing UniversityChongqing 400044China State Key Laboratory of Marine Resource Utilization in South China Sea School of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China

Aqueous zinc ion batteries(AZIBs)have attracted much attention in recent years due to their high safety,low cost,and decent electrochemical ***,the traditional electrodes development process requires tedious synthesis and testing procedures,which reduces the efficiency of developing highperformance battery ***,we proposed a high-throughput screening strategy based on firstprinciples calculations to aid the experimental development of high-performance spinel cathode materials for *** obtained 14 spinel materials from 12,047 Mn/Zn-O based materials by examining their structures and whether they satisfy the basic properties of *** their band structures and density of states,open circuit voltage and volume expansion rate,ionic diffusion coefficient and energy barrier were further evaluated by first-principles calculations,resulting in five potential *** of the promising candidates identified,Mg_(2)MnO_(4),was experimentally synthesized,characterized and integrated into an AZIB based cell to verify its performance as a *** Mg_(2)MnO_(4)cathode exhibits excellent cycling stability,which is consistent with the theoretically predicted low volume ***,at high current density,the Mg_(2)MnO_(4)cathode still exhibits high reversible capacity and excellent rate performance,indicating that it is an excellent cathode material for *** work provides a new approach to accelerate the development of high-performance cathodes for AZIBs and other ion batteries.

关键词： Aqueous zinc ion battery Spinel High-throughput First-principles calculations Experiment Accelerate

Polaron mobility modulation by bandgap engineering in black phaseα-FAPbI_(3)

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Journal of Energy Chemistry 2023年第1期76卷 175-180,I0005页

作者： Chunwei Wang Zeyu Zhang Zhuang Xiong Xingyu Yue Bo Zhang Tingyuan jia Zhengzheng Liu Juan Du Yuxin Leng kuan sun Ruxin Li State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024ZhejiangChina MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems CQU-NUS Renewable Energy Materials&Devices Joint LaboratorySchool of Energy&Power EngineeringChongqing UniversityChongqing 400044China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Lead halide hybrid perovskites(LHP)have emerged as one of the most promising photovoltaic materials for their remarkable solar energy conversion *** transportation of the photoinduced carriers in LHP could screen the defect recombination with the help of the large polaron ***,the physical insight of the relationship between the superior optical-electronic performance of perovskite and its polaron dynamics related to the electron-lattice strong coupling induced by the substitution engineering is still lack of ***,the bandgap modulated thin films ofα-FAPbI_(3)with different element substitution is investigated by the time resolved Terahertz *** find the polaron recombination dynamics could be prolonged in LHP with a relatively smaller bandgap,even though the formation of polaron will not be affected ***,the large polaron mobility in(FAPb I_(3))0.95(MAPbI_(3))0.05thin film is~30%larger than that in(FAPb I_(3))0.85(MAPbBr_(3))*** larger mobility in(FAPb I_(3))0.95(MAPb I_(3))0.05could be assigned to the slowing down of the carrier scattering ***,the physical origin of the higher carrier mobility in the(FAPb I_(3))0.95(MAPbI_(3))0.05should be related with the lattice distortion and enhanced electron–phonon coupling induced by the *** addition,(FAPbI_(3))0.95(MAPbI_(3))0.05will lose fewer active carriers during the polaron cooling process than that in(FAPb I_(3))0.85(MAPbBr_(3)),indicating lower thermal dissipation in(FAPbI_(3))0.95(MAPbI_(3))*** results suggest that besides the smaller bandgap,the higher polaron mobility improved by the substitution engineering inα-FAPbI_(3)can also be an important factor for the high PCE of the black phaseα-FAPbI_(3)based solar cell devices.

关键词： Perovskites Polaron Mobility Terahertz spectroscopy

Quasi-Solid Thermoelectrics for Wearable Low-Grade Energy Harvesting

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CCS Chemistry 2024年第11期6卷 2627-2643页

作者： Zixian Dong Qingtao Xiang Zihan Zhang Jihe Tang Feng Li kuan sun Shanshan Chen MOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems School of Energy and Power EngineeringChongqing UniversityChongqing 400044 Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200433

Ionic thermoelectricity(i-TE),as a new energy conversion and storage technology,has been widely discussed by the academic *** one of the representatives of low-grade thermal energy recovery,i-TE has made remarkable progress and become an influential research direction in the energy *** them,thermoelectric ionogels have a wide range of applications in the field of energy recovery and utilization due to their excellent flexibility,stability,and thermoelectric conversion ability,providing many application possibilities for such *** development of highly efficient and stable ionic thermoelectric devices is largely dependent on the development of new materials and structural *** paper focuses on the recent strategies for improving the efficiency of thermoelectric conversion in the field of ionic thermoelectric gels,including new methods for material design,structural optimization,and innovative developments in the application of thermoelectric *** evaluation indicators of thermoelectric conversion efficiency are discussed,including ionic thermal voltage,ionic conductivity and power output,ductility,and self-healing ***,various application devices based on thermoelectric materials with excellent thermoelectric conversion properties are ***,different challenges and strategies that need to be addressed are presented in the hope of providing inspiration and guidance for the commercialization of i-TE.

关键词： ionic thermoelectric materials wearable thermoelectrics Soret effect quasi-solid state

Annealing-free alcohol-processable MoO_(X) anode interlayer enables efficient light utilization in organic photovoltaics

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Journal of Energy Chemistry 2021年第10期30卷 141-146,I0004页

作者： Ke Yang Shanshan Chen Yongli Zhou George Omololu Odunmbaku Zhenghong Xiong Qianguang Yang Ming Wang Zhipeng Kan Zeyun Xiao Shirong Lu kuan sun School of Energy&Power Engineering MOE Key Laboratory of Low-Grade Energy Utilization Technologies and SystemsCQU-NUS Renewable Energy Materials&Devices Joint LaboratoryChongqing UniversityChongqing 400044China Thin-film Solar Technology Research Center Chongqing Institute of Green and Intelligent TechnologyChongqing SchoolUniversity of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing 400714China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060GuangdongChina

Molybdenum oxide(MoO_(x))is a commonly used hole extraction material in organic *** MoO_(x) interlayer is deposited typically via thermal evaporation in *** meet the need for rollto-roll manufacturing,solution processing of MoO_(x) without post-annealing treatment is ***,we demonstrate an effective approach to produce annealing-free,alcohol-processable MoO_(x) anode interlayers,namely S-MoO_(x),by utilizing the bis(catecholato)diboron(B_(2) Cat_(2))molecule to modify the surface oxygen sites in MoO_(x).The formation of surface diboron-oxygen complex enables the alcohol solubility of S-MoO_(x).An enhanced light utilization is realized in the S-MoO_(x)-based organic *** affords a superior short-circuit current density(Jsc)close to 26 mA cm^(-2) and ultimately a high power-conversion efficiency(PCE)of 15.2%in the representative PM6:Y6 based inverted OPVs,which is one of the highest values in the inverted OPVs using an as-cast S-MoO_(x) anode interlayer.

关键词： Solution processable Annealing free Molybdenum oxide Organic solar cell