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Bimetallic selenide heterostructure with directional built-in electricfield confined in N-doped carbon nanofibers for superior sodium storage with ultralong lifespan

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Journal of Energy Chemistry 2024年第4期91卷 407-416页

作者： Junying Weng Degui Zou Wenyong Yuan pengfei zhou Minghui Ding Jin zhou Hailin Cong Fangyi Cheng School of Materials Science and Engineering Shandong University of TechnologyZibo 255000ShandongChina School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Constructing heterostructure is considered as an effective strategy to address the sluggish electronic and ionic kinetics of anode materials for sodium ion batteries(SIBs).However,realizing the orientated growth and uniform distribution of the heterostructure is still a great challenge.Herein,the regulated novel CoSe_(2)/NiSe_(2)heterostructure confined in N-doped carbon nanofibers(CoSe_(2)/NiSe_(2)@N-C)are prepared by using Co/Ni-ZIF template,in which,the CoSe_(2)/NiSe_(2)heterostructures realize uniform distribution on a micro level.Benefiting from the unique heterostructure and N-doped carbon nanofibers,the CoSe_(2)/NiSe_(2)@N-C deliveries superior rate capability and durable cycle lifespan with a reversible capacity of 400.5 mA h g^(-1)after 5000 cycles at 2 A g^(-1).The Na-ion full battery with CoSe_(2)/NiSe_(2)@N-C anode and layered oxide cathode displays a remarkable energy density of 563 W h kg^(-1)with 241.1 W kg^(-1)at 0.1 A g^(-1).The theoretical calculations disclose that the periodic and directional built-in electric-field along with the heterointerfaces of CoSe_(2)/NiSe_(2)@N-C can accelerate electrochemical reaction kinetics.The in(ex)situ experimental measurements reveal the reversible conversion reaction and stable structure of CoSe_(2)/NiSe_(2)@N-C during Na+insertion/extraction.The study highlights the potential ability of precisely controlled heterostructure to stimulate the electrochemical performances of advanced anode for SIBs.

关键词： CoSe_(2)/NiSe_(2) heterostructure Built-in electric-field Rate capability Ultralong lifespan Sodium ion batteries

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Manipulating Na occupation and constructing protective film of P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2) as long-term cycle stability cathode for sodium-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 603-611,I0013页

作者： Yiran Sun pengfei zhou Siyu Liu Zhongjun Zhao Yihao Pan Xiangyan Shen Xiaozhong Wu Jinping Zhao Junying Weng Jin zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 0255000ShandongChina School of Materials Science and Engineering Shandong University of TechnologyZibo 255049ShandongChina

P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)(NNMO)is promising cathode material for sodium-ion batteries(SIBs)due to its high specific capacity and fast Na+diffusion rate.Nonetheless,the irreversible P2-O_(2)phase transformation,Na+/vacancy ordering,and transition metal(TM)dissolution seriously damage its cycling stability and restrict its commercialization process.Herein,Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp(LiPO_(2)F_(2))film-forming electrolyte additive.The Zn/Ti co-doping regulates the occupancy ratio of Nae/Nafat Na sites and disorganizes the Na+/vacancy ordering,resulting in a faster Na+diffusion kinetics and reversible P2-Z phase transition for P2-Na_(0.67)Ni_(0.28)Zn_(0.05)Mn_(0.62)Ti_(0.05)O_(2)(NNZMTO).Meanwhile,the LiPO_(2)F_(2)additive can form homogeneous and ultrathin cathode-electrolyte interphase(CEI)on NNZMTO surface,which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution,surface structure transformation,and micro-crack generation.Combination studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with Li PO_(2)F_(2)additive.As a result,the NNZMTO displays outstanding capacity retention of 94.44%after 500 cycles at 1C with 0.3 wt%Li PO_(2)F_(2),excellent rate performance of 92.5 mA h g^(-1)at 8C with 0.1 wt%Li PO_(2)F_(2),and remarkable full cell capability.This work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials,which provides a promising direction for developing high-performance cathodes for SIBs.

关键词： Layered cathode Zn/Ti co-doping Na occupation Electrolyte additive Sodium-ion batteries

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Matryoshka-type carbon-stabilized hollow Si spheres as an advanced anode material for lithium-ion batteries

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Chinese Chemical Letters 2022年第6期33卷 3236-3240页

作者： Huimin Wu Peibo Gao Jinglin Mu Zhichao Miao pengfei zhou Tong zhou Jin zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255049China

Silicon(Si)is regarded as the potential anode for lithium-ion batteries(LIBs),due to the remarkable theoretical specific capacity and low voltage plateau.However,the rapid capacity decay resulting from volume variation and slow electron/ion transportation of Si limit its practical application.Here,matryoshka-type carbon-stabilized hollow silicon spheres(Si/C/Si/C)are synthesized by an aluminothermic reduction and calcination process.The Si/C/Si/C anode materials prepared at 500℃(Si/C/Si/C-500)exhibit unique structures,in which amorphous region and porous structure are preserved in the Si layers.The anode based on Si/C/Si/C-500 displays an initial specific capacity of 2792 m Ah/g at a current density of 100 m A/g.At 1000 m A/g,this anode retains a reversible capacity of 1673 m Ah/g,86.9%of the initial capacity after 200 cycles.Such synthetic strategy can be employed to fabricate other high-capacity anode materials with large volume variation during charge/discharge process.

关键词： Lithiun-ion battery Hollow Si Matryoshka structure Anode Molten salts

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Heterogeneous isomorphism hollow SiGe nanospheres with porous carbon reinforcing for superior electrochemical lithium storage

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Journal of Energy Chemistry 2023年第4期79卷 222-231页

作者： Peibo Gao Huimin Wu Wenhao Liu Shuang Tian Jinglin Mu Zhichao Miao pengfei zhou Huanian Zhang Tong zhou Jin zhou School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255049ShandongChina School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049ShandongChina

Silicon is emerging as a promising next-generation lithium-ion battery anode because of its high theoretical capacity and low cost.However,the poor cyclability and inferior rate performance hinder its largescale applications.Here,hollow silicon/germanium(H-SiGe)nanospheres with a binary-active component and heterogeneous structure combined with porous carbon(pC)reinforcing are synthesized as lithium-ion battery anodes.Experimental studies demonstrate that the H-SiGe/pC anodes possess tiny volume expansion,high ion/electron conductivity,and stable electrode interface.Theoretical calculations confirm that through the replacement of Si using Ge with rational component control,the diffusion energy barrier of lithium will be reduced and lithium storage ability can be improved because of the slight charge polarization.Benefiting from these unique merits,the H-SiGe/pC anodes display a high initial specific capacity of 2922.2 mA h g^(-1)at 0.1 A g^(-1),superior rate capability(59.4%capacity retention from 0.5 to 8 A g^(-1)),and excellent cycling stability(81%retention after 700 cycles at 5 A g^(-1)at 1.0–1.2 mg cm^(-2)).An outstanding stability is preserved even at a high loading of 3.2 mg cm^(-2)with an improved reversible capacity of 429.1 mA h g^(-1)after 500 cycles at 4 A g^(-1).Furthermore,the full-cell with the prelithiated H-SiGe/pC anode and LiFePO4cathode exhibits an impressive capacity performance.

关键词： Si/Ge Heterostructures Anode Molten salt Li-ion battery

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Insights into the enhanced structure stability and electrochemical performance of Ti^(4+)/F^(-) co-doped P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2) cathodes for sodium ion batteries at high voltage

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Journal of Energy Chemistry 2022年第4期31卷 655-662页

作者： pengfei zhou Jing Zhang Zhennan Che Zuhao Quan Ju Duan Xiaozhong Wu Junying Weng Jinping Zhao Jin zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049ShandongChina School of Materials Science and Engineering Shandong University of TechnologyZibo 255049ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

P2-Na_(0.67)N_(i0.33)Mn_(0.67)O_(2)is considered as a promising cathode material for sodium-ion battery (SIBs)because of its high capacity and discharge potential.However,its practical use is limited by Na^(+)/vacancy ordering and P2-O2 phase transition.Herein,a Ti^(4+)/F^(-) co-doping strategy is developed to address these issues.The optimal P2-Na_(0.67)Ni_(0.33)Mn_(0.37)Ti_(0.3)O_(1.9)F_(0.1) exhibits much enhanced sodium storage performance in the high voltage range of 2.0–4.4 V,including a cycling stability of 77.2%over 300cycles at a rate of 2 C and a high-rate capability of 87.7 m Ah g^(-1) at 6 C.Moreover,the P2-Na_(0.67)Ni_(0.33)Mn_(0.37)Ti_(0.3)O_(1.9)F_(0.1) delivers reversible capacities of 82.7 and 128.1 m Ah g^(-1) at-10 and 50℃ at a rate of 2 C,respectively.The capacity retentions over 200 cycles at-10℃ is 94.2%,implying more opportunity for practical application.In-situ X-ray diffraction analysis reveals that both P2-O2 phase transitions and Na^(+)/vacancy ordering is suppressed by Ti^(4+)/F^(-) co-doping,which resulting in fast Na^(+) diffusion and stable phase structure.The hard carbon//P2-Na_(0.67)Ni_(0.33)Mn_(0.37)Ti_(0.3)O_(1.9)F_(0.1) full cell exhibits a high energy density of 310.2 Wh kg^(-1) and remarkable cyclability with 82.1%retention after 300 cycles at 1 C in the voltage range of 1.5–4.2 V.These results demonstrate that the co-doping Ti^(4+)/F^(-) is a promising strategy to improve the electrochemical properties of P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2),providing a facile tactic to develop high performance cathode materials for SIBs.

关键词： P2-Na_(0.67)N_(i0.33)Mn_(0.67)O_(2) Ti^(4+)/F^(-)co-doping Phase transition Na^(+)/vacancy ordering Sodium-ion batteries

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Corrosion engineering boosting bulk Fe_(50)Mn_(30)Co_(10)Cr_(10)high-entropy alloy as high-efficient alkaline oxygen evolution reaction electrocatalyst

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Journal of Materials Science & Technology 2022年第14期109卷 267-275页

作者： pengfei zhou Dong Liu Yuyun Chen Mingpeng Chen Yunxiao Liu Shi Chen Chi Tat Kwok Yuxin Tang Shuangpeng Wang Hui Pan Institute of Applied Physics and Materials Engineering University of Macao999078Macao Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of Macao999078Macao Department of Electromechanical Engineering Faculty of Science and TechnologyUniversity of Macao999078Macao College of Chemical Engineering Fuzhou UniversityFuzhou 350116China

Oxygen evolution reaction(OER)is a critical process in electrocatalytic water splitting.However,the development of low-cost,highly efficient OER electrocatalysts by a simple method that can be used for industrial application on a large scale is still a huge challenge.Recently,high entropy alloy(HEA)has acquired extensive attention,which may provide answers to the current dilemma.Here,we report bulk Fe_(50)Mn_(30)Co_(10)Cr_(10),which is prepared by 3D printing on a large scale,as electrocatalyst for OER with high catalytic performance.Especially,an easy approach,corrosion engineering,is adopted for the first time to build an active layer of honeycomb nanostructures on its surface,leading to ultrahigh OER performance with an overpotential of 247 mV to achieve a current density of 10 mA cm^(-2),a low Tafel slope of 63 mV dec^(-1),and excellent stability up to 60 h at 100 mA cm^(-2)in 1 M KOH.The excellent catalytic activity mainly originates from:(1)the binder-free self-supported honeycomb nanostructures and multi-component hydroxides,which improve intrinsic catalytic activity,provide rich active sites,and reduce interfacial resistance;and(2)the diverse valence states for multiple active sites to enhance the OER kinetics.Our findings show that corrosion engineering is a novel strategy to improve the bulk HEA catalytic performance.We expect that this work would open up a new avenue to fabricate large-scale HEA electrocatalysts by 3D printing and corrosion engineering for industrial applications.

关键词： Electrocatalysis High entropy alloy Corrosion engineering Self-supporting Oxygen evolution reaction

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Multiplex genome editing targeting soybean with ultra-low anti-nutritive oligosaccharides

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The Crop Journal 2023年第3期11卷 825-831页

作者： Wenxin Lin Huaqin Kuang Mengyan Bai Xiaomeng Jiang pengfei zhou Yinghua Li Bo Chen Huarong Li Yuefeng Guan College of Resources and Environment Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design Guangzhou Key Laboratory of Crop Gene EditingInnovative Center of Molecular Genetics and EvolutionSchool of Life SciencesGuangzhou UniversityGuangzhou 510006GuangdongChina FAFU-UCR Joint Center for Horticultural Biology and Metabolomics Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Bioinformatics Department School of Life Sciences and TechnologyTongji UniversityShanghai 200092China KingAgroot CropScience Co. Ltd.Qingdao 266500ShandongChina

Soybean is the primary source of plant protein for humans.Owing to the indigestibility of the raffinose family of oligosaccharides(RFO),raffinose and stachyose are considered anti-nutritive factors in soybean seeds.Low-RFO soybean cultivars are generated by mutagenesis of RFO biosynthesis genes,but the carbohydrate profiles invite further modification to lower RFOs.This study employed a pooled multiplex genome editing approach to target four seed-specifically expressed genes mediating RFO biosynthesis,encoding three raffinose synthases(RS2,RS3,and RS4)and one stachyose synthase.In T1progeny,rs2/rs3 and rs4/sts homozygous double mutants and a rs2/rs3/rs4/sts quadruple mutant(rfo-4m)were characterized.The rs2/rs3 mutant showed reduced raffinose and stachyose contents,but the rs4/sts mutant showed only reduced stachyose in seeds.The RFO contents in the rfo-4m mutant were almost eliminated.Metabolomic analysis showed that the mutation of four RFO biosynthesis genes led to a shift of metabolic profile in the seeds,including the accumulation of several oligosaccharides-related metabolites.These mutants could contribute to precision breeding of soybean cultivars for soy food production.

关键词： Soybean Genome editing Raffinose family of oligosaccharides Raffinose Stachyose Precision breeding

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Hybrid optimization algorithm based on chaos,cloud and particle swarm optimization algorithm

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Journal of Systems Engineering and Electronics 2013年第2期24卷 324-334页

作者： Mingwei Li Haigui Kang pengfei zhou Weichiang Hong Faculty of Infrastructure Engineering Dalian University of Technology Department of Information Management Oriental Institute of Technology

As for the drop of particle diversity and the slow convergent speed of particle in the late evolution period when particle swarm optimization（PSO） is applied to solve high-dimensional multi-modal functions,a hybrid optimization algorithm based on the cat mapping,the cloud model and PSO is proposed.While the PSO algorithm evolves a certain of generations,this algorithm applies the cat mapping to implement global disturbance of the poorer individuals,and employs the cloud model to execute local search of the better individuals;accordingly,the obtained best individuals form a new swarm.For this new swarm,the evolution operation is maintained with the PSO algorithm,using the parameter of pop distr to balance the global and local search capacity of the algorithm,as well as,adopting the parameter of mix gen to control mixing times of the algorithm.The comparative analysis is carried out on the basis of 4 functions and other algorithms.It indicates that this algorithm shows faster convergent speed and better solving precision for solving functions particularly those high-dimensional multi-modal functions.Finally,the suggested values are proposed for parameters pop distr and mix gen applied to different dimension functions via the comparative analysis of parameters.

关键词： particle swarm optimization（PSO） chaos theory cloud model hybrid optimization

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Remarkable synergistic effect in cobalt-iron nitride/alloy nanosheets for robust electrochemical water splitting

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Journal of Energy Chemistry 2022年第2期31卷 405-414页

作者： Mingpeng Chen Di Liu Baoye Zi Yuyun Chen Dong Liu Xinyu Du Feifei Li pengfei zhou Ye Ke Jielei Li Kin Ho Lo Chi Tat Kwok Weng Fai Ip Shi Chen Shuangpeng Wang Qingju Liu Hui Pan Institute of Applied Physics and Materials Engineering University of MacaoMacaoChina Yunnan Key Laboratory for Micro/Nano Materials&Technology National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091YunnanChina Department of Electromechanical Engineering Faculty of Science and TechnologyUniversity of MacaoMacaoChina Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacaoChina

Design and synthesis of noble-metal-free bifunctional catalysts for efficient and robust electrochemical water splitting are of significant importance in developing clean and renewable energy sources for sustainable energy consumption.Herein,a simple three-step strategy is reported to construct cobalt-iron nitride/alloy nanosheets on nickel foam(CoFe-NA/NF)as a bifunctional catalyst for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).The electrocatalyst with optimized composition(CoFe-NA2/NF)can achieve ultralow overpotentials of 73 mV and 250 mV for HER and OER,respectively,at a current density of 10 mA cm^(-2) in 1 M KOH.Notably,the electrolyzer based on this electrocatalyst is able to boost the overall water splitting with a cell voltage of 1.564 V to deliver 10 mA cm^(-2) for at least 50 h without obvious performance decay.Furthermore,our experiment and theoretical calculation demonstrate that the combination of cobalt-iron nitride and alloy can have low hydrogen adsorption energy and facilitate water dissociation during HER.In addition,the surface reconstruction introduces metal oxyhydroxides to optimize the OER process.Our work may pave a new pathway to design bifunctional catalysts for overall water splitting.

关键词： Bifunctional electrocatalyst Metal nitride/alloy nanocomposite Overall water splitting High performance

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准连续c切Er,Yb:YAl_(3)(BO_(3))_(4)激光器的偏振操控

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红外与激光工程 2024年第4期53卷 58-66页

作者：佘凯谢鹏建周鹏斐魏勇许珊李丙轩张戈福州大学化学学院福建福州350108 中国科学院福建物质结构研究所光电材料化学与物理重点实验室福建福州350002 中国科学院大学福建学院福建福州350002 福建师范大学化学与材料学院福建福州350117 湖南理工学院物理与电子科学学院湖南岳阳414006 湖北文理学院低维光电材料与器件湖北省重点实验室湖北襄阳441053 福建省光电信息科技创新实验室福建福州350108

通过构建谐振腔模型,分析了各向同性固体激光器中两个本征模式相干叠加后的光斑奇异特征。并且实验验证了在不使用任何特定的腔内光学偏振选择元件的情况下,在二极管泵浦的准连续c切Er,Yb:YAl_(3)(BO_(3))_(4)激光器中可以有效操控1.6μ... 详细信息

通过构建谐振腔模型,分析了各向同性固体激光器中两个本征模式相干叠加后的光斑奇异特征。并且实验验证了在不使用任何特定的腔内光学偏振选择元件的情况下,在二极管泵浦的准连续c切Er,Yb:YAl_(3)(BO_(3))_(4)激光器中可以有效操控1.6μm输出激光的偏振态。实现了从部分偏振态转化成稳定的线偏振态,其线偏振方向为可切换的正交特殊情况,均具有21 dB的偏振消光比。同时通过光斑对比,验证了激光器的线偏振输出来源于两个正交本征模式的相干叠加。文中为c切Er,Yb:YAl_(3)(BO_(3))_(4)激光器线偏振光的直接输出与偏振态的调控提供了可靠的方案。

关键词：固体激光器偏振调控 c切Er Yb:YAl_(3)(BO_(3))_(4) 准连续泵浦光束轮廓

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