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Suppressing interfacial polarization via entropy increase strategy for superior energy-storage performance of Na_(0.5)Bi_(0.5)TiO_(3)-based ceramics

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Journal of Materiomics 2024年第4期10卷 947-955页

作者： Hanyu Zhao Wenjun Cao Donghao Han Xiyue Zhu Cen Liang Changyuan Wang Chunchang Wang Laboratory of Dielectric Functional Materials School of Physics&Materials ScienceAnhui UniversityHefei230601China

High entropy engineering has emerged as a new strategy to improve the energy storage density and efficiency of dielectric capacitors due to its unique design ***,the recyclable energy storage density(Wrec)reported so far has never exceeded 2 J/cm^(3) for the type of high-entropy ceramics with equimolar elements occupying A or B *** order to improve this type high-entropy ***_(0.5)Bi_(0.5)TiO_(3)(NBT)was used as the matrix,equimolar Sr^(2+),La^(3+),K^(+)and Ba^(2+)were gradually introduced into at the A-site of the matrix lattice to increase configurational *** results show that the relaxor degree,band gap width,interfacial polarization,and breakdown field strength are effectively improved with increasing *** them,suppressing interfacial polarization is an important factor to increase the breakdown field strength and thus enhance the energy storage ***(Na1/6Bi1/6Sr1/6La1/6K1/6Ba1/6)TiO_(3)(NBSLKBT)sample with the highest configurational entropy shows an ultra-high Wrec of 9.8 J/cm^(3) and the energy storage efficiency(η=86.5%).This work demonstrates that entropy strategy for superior energy-storage performance still works on the above type high-entropy ceramics and opens up a new way of modulating interface polarization by entropy increase strategy.

关键词： High entropy ceramics energy storage Interfacial polarization Configurational entropy

Covalent Triazine Framework Nanosheets:Synthesis and energy Conversion and storage

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Chinese Journal of Chemistry 2024年第3期42卷 301-316页

作者： Zhao Liu Congxu Wang Wenjing Yuan Yuxi Xu School of Materials Science & Engineering Hebei University of TechnologyTianjin300130 China School of Engineering Westlake UniversityHangzhouZhejiang310024 China

Covalent triazine framework nanosheets (CTF NSs),an emerging class of two-dimensional nanomaterials,have received great attention due to their abundant active sites,permanent porosity,molecular structural diversity,superior chemical/thermal stability,and short charge diffusion path,enabling technological breakthroughs in a myriad of applications. The forefront developments and applications of CTF NSs as photocatalysts and electrochemical electrodes have conferred superior performance and made great impact in the field of energy and advanced catalysis. This forward-looking review aims to summarize the research trends,synthesis,properties of CTF NSs and their CTF counterpart,and highlight their progress in applications with respect to energy storage and conversion devices. Finally,the current challenges and future perspectives for CTF NSs are also presented.

关键词： Covalent triazine framework Nanosheets Photocatalysis energy storage Charge transfer

Electrospinning-derived functional carbon-based materials for energy conversion and storage

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Chinese Chemical Letters 2024年第6期35卷 3-13页

作者： Xinyu Ren Hong Liu Jingang Wang Jiayuan Yu Institute for Advanced Interdisciplinary Research(iAIR) School of Chemistry and Chemical EngineeringUniversity of JinanJi’nan 250022China State Key Laboratory of Crystal Materials Shandong UniversityJi’nan 250100China

The over-exploitation of fossil fuel energy has brought about serious environmental *** would be of great significance to construct efficient energy conversion and storage system to maximize utilize renewable energy,which contributes to reducing environmental *** the past few years,in terms of electrocatalysis and energy storage,carbon fiber materials show great advantages due to its outstanding electrical conductivity,good flexibility and mechanical *** a simple and low-cost technique,electrospinning can be employed to prepare various *** is noted that the functional fiber materials with different special structure and composition can be obtained for energy conversion and storage by combining electrospinning with other *** this paper,the structural design,controllable synthesis and multifunctional applications of electrospinning-derived functional carbon-based materials(EFCMs)is ***,we briefly introduce the history,basic principle and typical equipment of *** we discuss the strategies for preparing EFCMs with different structures and composition in *** addition,we show recently the application of advanced EFCMs in energy conversion and storage,such as nitrogen species reduction reaction,CO_(2) reduction reaction,oxygen reduction reaction,water-splitting,supercapacitors and ion *** the end,we propose some perspectives on the future development direction of EFCMs.

关键词： Electrospinning Carbon materials Functional fiber energy conversion energy storage Electrocatalysis

Enhanced energy-storage performance with optimized thermally stable dielectric property in BNT–BST ceramics modified by KNN doping

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Journal of Advanced Dielectrics 2024年第3期14卷 27-32页

作者： Shurong Li Chenglong Zhang Suzhi Li Le Zhang Haijun Wu State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University 710049Xi’anP.R.China School of Physics Xi’an Jiaotong University710049Xi’anP.R.China

Developing environmental-friendly materials with high-density energy storage is of paramount importance to meet the burgeoning demands for energy *** this study,we harness the modulation of a multicomponent solid solution by introducing KNN as a third element into the BNT–BST system,thereby achieving a marked enhancement in both energy storage performance and the temperature stability of the dielectric ***–4KNN stands out for its exceptional dielectric stability,with a dielectric constant variation rate within 10%across a broad temperature range of 40℃to 400℃,a feat attributed to the flattening and broadening of the Tm ***–2KNN exhibits superior energy storage capabilities,with an energy storage density of 1.324 J/cm^(3)and an energy storage efficiency of 72.3%,a result of the P–E loop becoming more *** advancements are pivotal for the sustainable progression of energy storage technologies.

关键词： BNT energy storage dielectric

energy storage properties of 0.87BaTiO3-0.i3Bi(Zn2/3(Nb0.85Ta0.15)1/3)O3 multilayer ceramic capacitors with thin dielectric layers

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Journal of Advanced Ceramics 2020年第3期9卷 292-302页

作者： Hongxian WANG Peiyao ZHAO Lingling CHEN Longtu LI Xiaohui WANG State Key Lab of New Ceramic and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Multilayer ceramic capacitors(MLCCs)for energy storage applications require a large discharge energy density and high discharge/charge efficiency under high electric ***,0.87BaTiO3--0.13Bi(Zn23(Nbog8sTao.1s)u3)O3(BTBZNT)MLCCs with double active dielectric layers were fabricated,and the effects of inner electrode and sintering method on the energy storage properties of BTBZNT MLCCs were *** using the pure Pt as inner electrode instead of Ago.6Pdo4 aloys,an alternating current(AC)breakdown strength(BDS)enhancement from 1047 to 1500 kV/cm was *** investigating the leakage current behavior of BTBZNT MLCCs,the Pt inner electrode and two-step sintering method(TSS)were confirmed to enhance the Schottky barrier and minimize the leakage current *** relatively high permitivity,dielectric sublinearity,and ultra-high BDS,the Pt TSS BTBZNT MLCCs exhibited a surprisingly discharge energy density(Udis)of 14.08 J/***,under an operating electric field of 400 kV/cm,the MLCCs also exhibited thermal stability with Udis variationenergy storage applications.

关键词： BaTiO multilayer ceramic capacitor(MLCC) leakage current energy storage

energy storage in High Variable Renewable energy Penetration Power Systems:Technologies and Applications

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CSEE Journal of Power and energy Systems 2023年第6期9卷 2099-2108页

作者： Huan Zhu Hu Li Guojing Liu Yi Ge Jing Shi Hai Li Ning Zhang State Grid Jiangsu Electric Power Co. LtdNanjingChina Economic Research Institute of State Grid Jiangsu Electric Power Company NanjingChina the State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

Integrating variable renewable energy is one of the most effective ways to achieve a low-carbon energy *** high penetration of variable renewable energy,such as wind power and photovoltaic,increases the challenge of balancing the power *** storage technology is regarded as one of the key technologies for balancing the intermittency of variable renewable energy to achieve high *** study reviews the energy storage technology that can accommodate the high penetration of variable renewable *** basic energy storage technologies that can accommodate time-scale variation are reviewed *** role of energy storage in the generation,transmission,distribution,and consumption for the high variable renewable energy penetration system is then *** supporting energy storage policies in the United States,the United Kingdom and China are *** suggestions are proposed from the perspectives of technology,business and *** paper provides guidelines for planning energy storage to enable a high variable renewable energy penetration power system.

关键词： Application scenarios energy storage penetration renewable energy supporting policies

energy storage performances regulated by BiMnO3 proportion in limited solid solution films

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Chinese Physics B 2020年第11期29卷 457-462页

作者： Fei Guo Zhifeng Shi Yaping Liu Shifeng Zhao School of Physical Science and Technology Inner Mongolia Key Laboratory of Nanoscience and NanotechnologyInner Mongolia UniversityHohhot 010021China

Na0.5Bi0.5TiO3-BiMnO3(NBT-BM)limited solid solution films were fabricated to investigate the lattice modification on the energy storage *** introduction of the BM solute lattice induces the NBT solvent lattices undergoing the transition from the pure phase,solid solution,solubility limit to ***,the polarization states transfer from the macroscopic ferroelectric domains to nanodomains then to compound ferroelectric *** introduction of BiMnO3 generates great lattice changes including the local lattice fluctuation and the large lattice stretching,which enhance the energy storage performances,with the energy storage efficiency being enhanced from 39.2%to 53.2%and 51.7%and the energy density being enhanced from 33.1 J/cm3 to 76.5 J/cm^3 and 83.8 J/cm^3 for the BM components of 2%and 4%,*** lattice modifications play a key role in the energy storage performances for limited solid solution films,which provides an alternative strategy for energy storage material.

关键词： limited solid solution energy storage relaxor lattice engineering

energy storage materials derived from Prussian blue analogues

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Science Bulletin 2017年第5期62卷 358-368页

作者： Feng Ma Qing Li Tanyuan Wang Hanguang Zhang Gang Wu State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Department of Chemical and Biological Engineering University at Buffalo The State University of New York Buffalo NY 14260 USA

Prussian blue analogues(PBAs) with open frameworks have drawn much attention in energy storage fields due to their tridimensional ionic diffusion path, easy preparation, and low cost. This review summarizes the recent progress of using PBAs and their derivatives as energy storage materials in alkali ions,multi-valent ions, and metal-air batteries. The key factors to improve the electrochemical performance of PBAs as cathode materials in rechargeable batteries were firstly discussed. Several approaches for performance enhancement such as controlling the amounts of vacancies and coordinated water, optimizing morphologies, and depositing carbon coating are described in details. Then, we highlighted the significance of their diverse architectures and morphologies in anode materials for lithium/sodium ion batteries. Finally, the applications of Prussian blue derivatives as catalysts in metal-air batteries are also reviewed, providing insights into the origin of favorable morphologies and structures of catalyst for the optimal performance.

关键词： Prussian blue analogues energy storage Rechargeable battery Open frameworks Cathode materials Anode materials Catalysts

energy storage IN METAL DEVICES AND THE ADVANTAGES OF LIQUID HYDROGENTEMPERATURES

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Acta Metallurgica Sinica(English Letters) 1997年第3期10卷 277-279,28-282页

作者： VR. SobolO.N MazurenkoA.A. Drozd and B.B. Boiko(Institute of Solid State and Semiconductor Physics ASB, P. Brovka Str., 17, 220072 Minsk, Belarus) Inst of Solid State and Semiconductor Physics Minsk Belarus

Peculiarities of low temperature charge transport and enerpy accumulation in alu-minum devices are investigated by means of study of cylindrical conductors having a rudial cuerent fiow between inner and outer concentric contracts. Azimuthal current and, connected with it, self magnetic field are investigated in a wide range of radial current density up to 6000 A/cm2 under an external magnetic field up to 8 T Electron scattering processes are investigated and it is shown that relaxation electron mechanisms are determined by strong temperature dependence on account of high sus-ceptibility of scattering to anisotropy of electron dispersion law. The role of thermal phonons is investigated through an effective averaged conductivity tensor of polycrystalline medium. Using data of self magnetic self distribution on sample surface an energy density of self magnetic field is estimated. It is shown that at T=4.2 K average energy of self field may achieve at least 1 J/cm3. Using data of relaxation processes at temperature of liquid hydrogen it is established that self magnetic field must be a third of helium magnitude with respective self magnetic enengy density, spiral motion of carriers in this geometry being regarded as a current coils in usual inductive element.

关键词： energy storage charge transport magnetic field anisotropy