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In situ deposited cobalt-magnesium selenates as an advanced electrode for electrochemical energy storage

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Journal of Magnesium and Alloys 2022年第12期10卷 3565-3575页

作者： Manchi Nagaraju S.Chandra Sekhar Bhimanaboina Ramulu Shaik Junied Arbaz Jae Su Yu Department of Electronics and Information Convergence Engineering Kyung Hee University1732 Deogyeong-aeroGihung-guYongin-siGyeonggi-do 17104Republic of Korea

Currently,bimetallic selenates have attracted much attention as a prominent electrode composite material for supercapacitors owing to their higher redox chemistry and superior electrical ***,we synthesized cobalt-magnesium selenates (CoSeO3-Mg Se O4,CMS) via a facile hydrothermal process,followed by *** first,cobalt-magnesium oxide (Co2.32Mg0.68O4,CMO) was in situ prepared by a one-pot hydrothermal *** investigation on the morphological change was performed by synthesizing the same CMO samples at different growth times by keeping the temperature *** CMO electrode designed for 8 h of growth time (CMO-8 h)with an attractive morphology showed a higher areal capacity of 101.7μAh cm-2(at 3 m A cm-2) than the other CMO electrodes prepared for 6 and 10 *** exalted performance was achieved by the selenization of the CMO-8 h sample to form the CMS *** 3 m A cm-2,the resulted CMS exhibited nearly three times higher capacity,i.e.,385.4μAh cm-2,than the CMO-8 h ***,an asymmetric cell fabricated with CMS as a positive electrode also revealed good energy storage *** the applied voltage between 0 and 1.5 V,the asymmetric cell demonstrated maximum energy density of 0.159 m Wh cm-2(18.6 Wh kg-1) and maximum power density of 18.47 m W cm-2(1938 W kg-1),***,novel magnesium-based metal selenates can act as an efficient electrode for energy storage.

关键词： Co2.32Mg0.68O4 CoSeO3–MgSeO4 In situ formation energy storage Asymmetric cell

Interlayer material technology of manganese phosphate toward and beyond electrochemical pseudocapacitance over energy storage application

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Journal of Materials Science & Technology 2021年第12期71卷 109-128页

作者： Xu Bao Wei-Bin Zhang Qiang Zhang Lun Zhang Xue-Jing Ma Jianping Long College of Materials and Chemistry&Chemical Engineering Chengdu University of TechnologyChengdu 610059China

Manganese phosphates have shown excellent performances and great potential in electrochemical energy storage,which are demonstrated by research works published in recent *** manganese phosphates,the open-framework structures with large channels and cavities endow them with good ion conductivity and charge storage *** this review,we present the recent progress on manganese phosphates,by focusing on their advantages/disadvantages and potential applications as a new class of electrode materials in *** structural characteristics,synthesis methods,and mineral sources to prepare these manganese phosphates are investigated,together with the modification,as they strongly affect the electrochemical energy storage *** are paid to those hybrid-type materials,where strong synergistic effects *** the summary,interlayer engineering for the manganese phosphates and hybrid-types are proposed and discussed.

关键词： Manganese phosphate Layer structure Interlayer technology Pseudocapacitance Supercapacitor energy storage

Scalable synthesis of sub-lO0 nm hollow carbon nanospheres for energy storage applications

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Nano Research 2018年第4期11卷 1822-1833页

作者： Hongyu Zhao Fan Zhang Shumeng Zhang Shengnan He Fei Shen Xiaogang Han Yadong Yin Chuanbo Gao Center for Materials Chemistry Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an 710054 China Center of Nanomaterials for Renewable energy Key Lab of Smart Grid of Shaanxi Province State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710054 China Department of Chemistry University of California Riverside CA 92521 USA

Sub-100 nm hollow carbon nanospheres with thin shells are highly desirable anode materials for energy storage applications. However, their synthesis remains a great challenge with conventional strategies. In this work, we demonstrate that hollow carbon nanospheres of unprecedentedly small sizes （down to - 32.5 nm and with thickness of - 3.9 nm） can be produced on a large scale by a templating process in a unique reverse micelle system. Reverse micelles enable a spatially confined Stober process that produces uniform silica nanospheres with significantly reduced sizes compared with those from a conventional Stober process, and a subsequent well-controlled sol-gel coating process with a resorcinol-formaldehyde resin on these silica nanospheres as a precursor of the hollow carbon nanospheres. Owing to the short diffusion length resulting from their hollow structure, as well as their small size and microporosity, these hollow carbon nanospheres show excellent capacity and cycling stability when used as anode materials for lithium/sodium-ion batteries.

关键词： hollow carbon nanospheres reverse micelles nanoreactors templating synthesis energy storage

Vertically aligned two-dimensional materials-based thick electrodes for scalable energy storage systems

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Nano Research 2021年第10期14卷 3562-3575页

作者： Zhengyu Ju Xiao Zhang Jingyi Wu Guihua Yu Materials Science and Engineering Program Texas Materials InstituteThe University of Texas at AustinAustinTexas 78712USA

Together with the blooming of portable smart devices and electric vehicles in the last decade,electrochemical energy storage(EES)devices capable of high-energy and high-power storage are urgently ***-dimensional(2D)materials,benefiting from the short solid-state diffusion distance,are well recognized to possess excellent electrochemical ***,liquid diffusion,the rate-determining process in thick electrodes,is notably slow in 2D materials-based electrodes stemming from their stacking during electrode processing,which considerably limits their applications for high energy *** fully exploit intrinsic advantages of 2D materials for scalable energy storage devices,this review summarizes several important strategies,ranging from assembly to template methods,to fabricate vertically aligned 2D materials-based *** further discuss the advantages and challenges of these methods in terms of key features of thick electrodes and illustrate the design principles for high-energy/power devices.

关键词： two-dimensional materials energy storage alignment assembly high energy/power

Multi-scale synergic optimization strategy for dielectric energy storage ceramics

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Journal of Advanced Ceramics 2023年第4期12卷 649-680页

作者： Xuhui Fan Jing Wang Hao Yua Zehan Zheng Ji Zhang Kongjun Zhu State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China School of Materials Science and Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

Dielectric capacitors,serving as the indispensable components in advanced high-power energy storage devices,have attracted ever-increasing attention with the rapid development of science and *** various dielectric capacitors,ceramic capacitors with perovskite structures show unique advantages in actual application,e.g.,excellent adaptability in high-temperature *** the optimization of their energy storage performance has become a hot research topic *** review presents the basic principles of energy storage in dielectric ceramics and introduces multi-scale synergic optimization strategies according to the key factors for superior energy storage *** summarizing the common points in numerous works,several universal modification strategies are reviewed,and future research on fatigue fracture of ceramic capacitors under multi-field including but not limited to force,electric,and thermal coupling conditions is also anticipated.

关键词： dielectric capacitors high-power energy storage multi-scale

Pyrochlore-based high-entropy ceramics for capacitive energy storage

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Journal of Advanced Ceramics 2022年第7期11卷 1179-1185页

作者： Yiying CHEN Junlei QI Minhao ZHANG Zixi LUO Yuan-Hua LIN State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

High-performance dielectrics are widely used in high-power systems,electric vehicles,and aerospace,as key materials for capacitor *** application scenarios under these extreme conditions require ultra-high stability and reliability of the ***,a novel pyrochlore component with high-entropy design of Bi1.5Zn_(0.75)Mg_(0.25)Nb_(0.75)Ta_(0.75)O_(7)(BZMNT)bulk endows an excellent energy storage performance of Wrec≈2.72 J/cm3 together with an ultra-high energy efficiency of 91%at a significant enhanced electric field Eb of 650 kV/***,the temperature coefficient(TCC)of BZMNT(~−220 ppm/℃)is also found to be greatly improved compared with that of the pure Bi1.5ZnNb1.5O7(BZN)(~−300 ppm/℃),demonstrating its potential application in temperature-reliable *** high-entropy design results in lattice distortion that contributes to the polarization,while the retardation effect results in a reduction of grain size to submicron scale which enhances the *** high-entropy design provides a new strategy for improving the high energy storage performance of ceramic materials.

关键词： high entropy bismuth-based pyrochlore high-temperature stability energy storage

Benefits of Stochastic Optimization for Scheduling energy storage in Wholesale Electricity Markets

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Journal of Modern Power Systems and Clean energy 2021年第1期9卷 181-189页

作者： Hyeong Jun Kim Ramteen Sioshansi Antonio J.Conejo the Department of Integrated Systems Engineering The Ohio State UniversityColumbusOhioUSA the Department of Electrical and Computer Engineering The Ohio State UniversityColumbus.OhioUSA

We propose a two-stage stochastic model for optimizing the operation of energy storage. The model captures two important features: uncertain real-time prices when day-ahead operational commitments are made;and the price impact of charging and discharging energy storage. We demonstrate that if energy storage has full flexibility to make real-time adjustments to its day-ahead commitment and market prices do not respond to charging and discharging decisions, there is no value in using a stochastic modeling framework, i.e., the value of stochastic solution is always zero. This is because in such a case the energy storage behaves purely as a financial arbitrageur day ahead, which can be captured using a deterministic *** show also that prices responding to its operation can make it profitable for energy storage to "waste" energy, for instance by charging and discharging simultaneously, which is normally sub-optimal. We demonstrate our model and how to calibrate the price-response functions from historical data with a practical case study.

关键词： energy storage stochastic optimization value of stochastic solution electricity market

Regulating local electric field to optimize the energy storage performance of antiferroelectric ceramics via a composite strategy

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Journal of Advanced Ceramics 2023年第3期12卷 598-611页

作者： Ying Yang Zhanming Dou Kailun Zou Kanghua Li Wei Luo Wen Dong Guangzu Zhang Qiuyun Fu Shenglin Jiang School of Optical and Electronic Information Engineering Research Center for Functional Ceramics MOE and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China China Zhenhua Group Yunke Electmnics Co. Ltd.Guiyang 550018China

Electrostatic energy storage technology based on dielectrics is the basis of advanced electronics and high-power electrical *** polarization(P)and high electric breakdown strength(Eb)are the key parameters for dielectric materials to achieve superior energy storage *** this work,a composite strategy based on antiferroelectric dielectrics(AFEs)has been proposed to improve the energy storage ***,AlN is selected as the second phase for the(Pb_(0.915)Ba_(0.04)La_(0.03))(Zr_(0.65)Sn_(0.3)Ti_(0.05))O_(3)(PBLZST)AFEs,which is embedded in the grain boundaries to construct insulating networks and regulate the local electric field,improving the ***,it is emphasized that AFEs have the AFE–FE and FE–AFE phase transitions,and the increase of the phase transition electric fields can further improve the recoverable energy density(Wrec).As a result,the Eb increases from 180 to 290 kV·cm−1 with a simultaneous increase of the phase transition electric fields,magnifying the Wrec to~144%of the pristine *** mechanism for enhanced Eb and the phase transition electric fields is revealed by the finite element simulation ***,the PBLZST:1.0 wt%AlN composite ceramics exhibit favorable temperature stability,frequency stability,and charge–discharge ability,making the composite ceramics a promising candidate for energy storage applications.

关键词： energy storage antiferroelectric composites local electric field electric breakdown strength

Emission Trading Based Optimal Scheduling Strategy of energy Hub with energy storage and Integrated Electric Vehicles

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Journal of Modern Power Systems and Clean energy 2020年第2期8卷 267-275页

作者： Yanhong Luo Xinwen Zhang Dongsheng Yang Qiuye Sun the School of Information Science and Engineering Northeastern UniversityShenyang 110004China

This paper focuses on the optimal scheduling of the district energy system with multiple energy supply modes and flexible *** multi-energy system(MES),the energy hub(EH)model including energy storage system and integrated electric vehicle(EV)is *** on the model,the influence of pollutant trading market on total operation cost is analyzed,and the optimal scheduling strategy is further put forward to realize the minimum purchase cost and emission tax cost of the ***,this paper compares the economic benefit of the fixed mode and the response mode,and discusses the contribution of the energy storage device and the multi-energy complementary mode to energy utilization *** simulation results indicate that optimal scheduling strategy of the EH can coordinate various energy complementary modes ***,the proposed strategy is able to improve the operation economy of the EH,and ensure the better response effect of the demand *** sensitivity analysis demonstrates the impact of pollutant emission price change on emission reduction.

关键词： energy hub(EH) demand response electric vehicle(EV) energy storage emission trading operation optimization