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Journal of Energy Chemistry 2022年第2期31卷 556-564页

作者： Jiafeng Ruan Yahui Zhao Sainan Luo Jiaming Hu Yuepeng Pang Fang Fang Shiyou Zheng School of Materials Science and Engineering University of Shanghai for Science&TechnologyShanghai 200093China Department of Materials Science Fudan UniversityShanghai 200433China

Integrating the merits of long lifespan and excellent energy as well as power densities,potassium-ion hybrid capacitors(PIHCs)exhibit great prospects for future energy storage *** boost comprehensive performance of PIHCs,heteroatom-doping and morphology-tuning as two comprehensive strategies have been devoted to designing uniquely structural carbon-based materials with favorable *** ideal strategy for simultaneous atomic doping and structural regulation is expected to be ***,we propose a novel"Killing Two Birds with One Stone"strategy to prepare a tri-elements doped hollow carbon sphere(TED-HCS)as PIHCs anodes,that is,a single template of spherical CoP particles is rationally adopted,which not only provides both a P source for heteroatom-doping but also acts as a selfsacrificial template for hollow-structure *** multifunctional TED-HCS presents a high capacity of 473.0 mAh g^(-1) and excellent rate performance of 212.5 mAh g^(-1) at 5.0 A g^(-1).Remarkably,the as-assembled PIHCs show outstanding energy/power density(40.4 Wh kg^(-1)/10500 W kg^(-1))and remain high-capacity retention of 89.15%even cycling 12,000 ***"Killing Two Birds with One Stone"strategy offers new insight into the search for the preparation of carbon-based materials with multi-elements doping and specific morphology structure.

关键词： capacitors Potassium-ion Doping Carbon material Anode

Fabricating high-performance sodium ion capacitors with P2-Na_(0.67)Co_(0.5)Mn_(0.5)O_2 and MOF-derived carbon

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Journal of Energy Chemistry 2019年第1期28卷 79-84页

作者： Haichen Gu Lingjun Kong Huijuan Cui Xianlong Zhou Zhaojun Xie Zhen Zhou School of Materials Science and Engineering National Institute for Advanced Materials Institute of New Energy Material Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University

Sodium ion capacitors(SICs) have been considered as a kind of promising devices to achieve both high power and energy density. However, it is still a challenge to achieve high energy output at elevated power delivery due to the poor rate capability of battery-type electrode materials and the kinetic mismatch with capacitor-type electrode materials. In this work, to fabricate SICs, P2-Na_(0.67)Co_(0.5)Mn_(0.5)O_2(P2-NCM)was chosen as the battery-type cathode material, and a typical metal-organic framework(MOF) material,zeolitic imidazolate framework-8(ZIF-8) derived carbon(ZDC) was utilized as the capacitor-type anode material. Due to the kinetic match and high-rate performance of both electrodes, the ZDC//P2-NCM SICs exhibited an energy output of 18.8 Wh kg^(-1) at a high power delivery of 12.75 kW kg^(-1).

关键词： Energy density Power density P2-phase material Zeolitic imidazolate framework-8 Sodium ion capacitors

Nondestructive Evaluation of Ferroelectric Multilayer capacitors Using Electromechanical Resonances

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Journal of Materials Science & Technology 1995年第2期11卷 114-118页

作者： SUN, HT WANG, HF ZHANG, LY YAO, X Xi'an Jiaotong Univ Xi'an China

Under the mechanically free and clamped boundary conditions, electromechanical resonances-of ceramic multilayer capacitors are calculated using vibration and piezoelectric equations. Multilayer capacitors made of ferroelectric BaTiO3 and Pb(Mp(1/3)Nb(2/3))O-3 ceramics have been used to examine the theoretical calculation. Frequency spectra of impedance and phase angle, capacitance and loss tangent of the capacitors under de bias fields are carefully measured. A sudden change around the resonant frequency is observed in these spectra. A damped resonance indicates a defective capacitor while an undamped resonance is corresponding to defect free. Experimental results suggest that it is possible to use the spectra as a real time nondestructive evaluation method.

关键词： capacitors

Development and Characterization of Metal-Insulator-Metal capacitors with SiNx Thin Films by Plasma-Enhanced Chemical Vapor Deposition

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Chinese Physics Letters 2010年第7期27卷 268-271页

作者：王琮张放金南英 RFIC Center Kwangwoon University Seoul 139701 Korea

We report the fabrication of high breakdown voltage metal-insulator-metal （MIM） capacitors with 200-nm silicon nitride deposited by plasma-enhanced chemical vapor deposition with 0.957 SiH4/NH3 gas mixing rate, 0.9 Torr working pressure, and 60 W rf power at 250℃ chamber temperature. Some optimized mechanisms such as metal source wiping, pre-melting and evaporation rate adjustment are used for increasing the yield of the MIM capacitors. N2 annealing and O2/H2 plasma pre-deposition treatment is proposed to increase the reliability of the MIM capacitors in high-temperature, high-pressure, and high-humidity environments. A 97% yield and up to 148 V breakdown voltage of a 13.06pF MIM capacitor with 0.04 mm^2 die area can be fabricated.

关键词： CHEMICAL vapor deposition METAL insulator semiconductors capacitors THIN films BREAKDOWN voltage MIXING circuits HUMIDITY

Interfacial/bulk synergetic effects accelerating charge transferring for advanced lithium-ion capacitors

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Chinese Chemical Letters 2024年第6期35卷 168-175页

作者： Chang Liu Zirui Song Xinglan Deng Shihong Xu Renji Zheng Wentao Deng Hongshuai Hou Guoqiang Zou Xiaobo Ji School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-Containing Mineral Resources School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China

The exploration of advanced materials through rational structure/phase design is the key to develop highperformance lithium-ion capacitors(LICs).However,high complexity of material preparation and difficulty in quantity production largely hinder the further ***,Cu_(5)FeS_(4-x)/C(CFS@C)heterojunction with rich sulfur vacancies has successfully achieved from natural bornite,presenting low costeffective and bulk-production *** functional theory(DFT)calculations indicate that rich vacancies in bulk phase can decrease band gap of bornite and thus improve its intrinsic electron conductivity,as well as the heterojunction spontaneously evokes a built-in electric field between its interfacial region,largely reducing the migration barrier from 1.27 e V to 0.75 e *** from these merits,the CFS@C electrodes deliver outperformed lithium storage performance,e.g.,high reversible capacity(822.4m Ah/g at 0.1 A/g),excellent cycling stability(up to 820 cycles at 2 A/g and 540 cycles at 5 A/g with respective capacity retention of over or nearly 100%).With CFS@C as anode and porous carbon nanosheets(PCS)as cathode,the assembled CFS@C//PCS LIC full cells exhibit high energy/power density characteristics of 139.2 Wh/kg at 2500 W/*** work is expected to offer significant insights into structure modifications/devising toward natural minerals for advanced energy-storage systems.

关键词： Bulk/interfacial modification Heterostructure Sulfur vacancies Lithium ion capacitors capacitors

Ternary polymer nanocomposites with concurrently enhanced dielectric constant and breakdown strength for high-temperature electrostatic capacitors

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InfoMat 2020年第2期2卷 389-400页

作者： He Li Lulu Ren Ding Ai Zhubing Han Yang Liu Bin Yao Qing Wang Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPennsylvania State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anShaanxiChina State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqingChina Faculty of Materials Science and Chemistry China University of GeosciencesWuhanHubeiChina

The exploration of high-energy-density electrostatic capacitors capable of operating both efficiently and reliably at elevated temperatures is of great significance in order to meet advanced power electronic *** energy density of a capacitor is strongly dependent on dielectric constant and breakdown strength of a dielectric ***,we demonstrate a class of solution-processable polymer nanocomposites exhibiting a concurrent improvement in dielectric constant and breakdown strength,which typically show a negative correlation in conventional dielectric materials,along with a reduction in dielectric *** excellent performance is enabled by the elegant combination of nanostructured barium titanate and boron nitride fillers with complementary *** ternary polymer nanocomposite with the optimized filler compositions delivers a discharged energy density of 2.92 J cm^−3 and a Weibull breakdown strength of 547 MV m^−1 at 150℃,which are 83%and 25%,respectively,greater than those of the pristine *** conduction behaviors including interfacial barrier and carrier transport process have been investigated to rationalize the energy storage performance of ternary polymer *** contribution provides a new design paradigm for scalable high-temperature polymer film capacitors.

关键词： breakdown strength capacitors dielectric constant high temperature polymer nanocomposites

Limits of physical properties and design for GBBL capacitors of semiconducting ceramics

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Chinese Science Bulletin 1995年第6期40卷 463-466页

作者：郑振华陈羽缪容之 Department of Physics Ningbo University Ningbo 315211 China

Grain boundary barrier layer （GBBL） capacitors are widely used for their excellent physical properties. But since the invention of BaTiO3 GBBL capacitor in the 1960s, no theory can quantitatively describe their physical properties, which has resulted in many problems in the design and manufacture of GBBL capacitors. In this note, on the basis of grain-boundary-barrier model, we quantitatively analyze the physical properties and their limits of GBBL capacitors, and thus make designs and study the methods to improve the properties of GBBL capacitors.

关键词： semiconducting ceramics GBBL capacitors limits of physical properties design of device.

Synergetic influence of ex-situ camphoric carbon nano-grafting on lithium titanates for lithium ion capacitors

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Journal of Energy Chemistry 2015年第3期24卷 337-345页

作者： Amruthalakshmi Vijayakumar Ranjusha Rajagopalan Anoop S.Sushamakumariamma Jickson Joseph Amrutha Ajay Shantikumar V Nair Deepak Krishna M.S Avinash Balakrishnan Nanosolar Division Amrita Center for Nanosciences Institute for Superconducting & Electronic Materials (ISEM) University of Wollongong

The present study provides detailed experimental results on the synthesis and characterization of carbonized lithium titanate spinel（LTO） composites as electrode materials for lithium ion *** LTO particles were grafted with a porous carbon layer obtained from the pyrolysis of *** graphitic nature of the carbon was confirmed through Raman *** relative contributions from the capacitive and diffusion controlled processes underlying these electrodes were mathematically *** transport mechanism underlying these electrodes was determined by measuring the work functions（φ） of LTO and carbon grafted LTO using ultraviolet photoelectron *** carbon grafted LTO composites exhibited an energy density of 330 m Wh L-1and a peak power density of 2.8 k W L-1,when employed as electrodes in coin cells with excellent cycling stability at the end of 4000 cycles.

关键词： functional composites capacitors electrical properties lithium ion energy storage

Robust Low Voltage Program-Erasable Cobalt-Nanocrystal Memory capacitors with Multistacked Al2O3/HfO2/Al2O3 Tunnel Barrier

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Chinese Physics Letters 2009年第8期26卷 313-316页

作者：廖忠伟苟鸿雁黄玥孙清清丁士进张卫张世理 State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai 200433 School of Information and Communication KTH (Royal Institute of Technology) Electrum 229 SE-164 40 Kista Sweden

A n atomic-layer-deposited Al2O3/HfO2/Al2O3 （A/H/A） tunnel barrier is in vestigated for Co nanocrystal memory capacitors. Compared to a single Al2O3 tunnel barrier, the A/H/A barrier can significantly increase the hysteresis window, i.e., an increase by 9 V for ±12 V sweep range. This is attributed to a marked decrease in the energy barriers of charge injections for the A/H/A tunnel barrier. Further, the Co-nanocrystal memory capacitor with the A/H/A tunnel barrier exhibits a memory window as large as 4.1 V for 100 μs program/erase at a low voltage of ±7 V, which is due to fast charge injection rates, i.e., about 2.4× 10^16 cm^-2 s^-1 for electrons and 1.9× 1016 cm^-2 s^-1 for holes.

关键词： ROBUST control COBALT compounds LOW voltage systems NANOCRYSTALS capacitors OXIDES TUNNELING (Physics) THIN films -- Electric properties

DMF stabilized Li3N slurry for manufacturing self-prelithiatable lithium-ion capacitors

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Science Bulletin 2020年第6期65卷 434-442,M0003页

作者： Cuilian Liu Tianyu Li Hongzhang Zhang Zihan Song Chao Qu Guangjin Hou Huamin Zhang Chuanfa Ni Xianfeng Li Division of Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Solid-state NMR&Catalytic Chemistry Group Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Shanghai Institute of Organic Chemistry Chinese Academy of Sciences.Shanghai 200032China

Li3N is an excellent zero-residue positive electrode pre-lithiation additive to offset the initial lithium loss in lithium-ion capacitors. However, Li3N has an intrinsic problem of poor compatibility with commonly used aprotic polar solvents in electrode manufacture procedure due to its high reactivity with commonly used solvents like N-methy-2-pyrrolidone(NMP) and etc. It is the Valley of Death between research and large-scale commercialization of Li-ion capacitors using Li3N as prelithiation agent. In this work, Li3N containing electrode is prepared by a commercially adoptable route for the first time, using N,Ndimethylformamide(DMF) to homogenate the electrode slurry. The DMF molecular stabilizing mechanism is confirmed via experiment analysis and DFT simulation, indicating that the dehydrogenation energy for DMF is obviously larger than other commonly used solvents such as NMP and etc. The soft package lithium-ion capacitors(LIC250) with only 12 wt% Li3N addition in AC positive electrode exhibits excellent rate capability, cyclic stability and ultrahigh specific energy. Its specific energy is 2.3 times higher than the Li3N-free devices, with energy retention as high as 90% after 10,000 cycles.

关键词： Li3N Soft package Pre-lithiation Lithium-ion capacitors High specific energy and long cycle life