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A safe,low-cost and high-efficiency presodiation strategy for pouch-type sodium-ion capacitors with high energy density

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Journal of Energy Chemistry 2022年第1期31卷 442-450,I0012页

作者： Congkai Sun Xiong Zhang Chen Li Kai Wang Xianzhong Sun Fangyan Liu Zhong-Shuai Wu Yanwei Ma Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China Stare Key Laboratory of Catalysis.Dalian Institute of Chemical Physics Chinese Academy of SciencesDalianLiaoning 116023China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalianLiaoning 116023China

Sodium-ion capacitors(SICs)have attracted appreciable attention in virtue of the higher energy and power densities compared with their rivals,supercapacitors and sodium-ion *** to the lack of sodium resources in cathode,presodiation is critical for SICs to further augment ***,current presodiation strategy utilizes metallic sodium as the presodiation *** this strategy,assembling/disassembling of half-cells is required,which is dangerous and in creases the time and cost of SIC leading to the restriction of their industrialization and *** we present a safe,low-cost and high-efficiency presodiation strategy by first employing Na_(2)C_(2)O_(4) as the sacrificial salt applied in ***_(2)C_(2)O_(4) is environmentally friendly and possesses considerably low *** additional residues remain after sodium extraction ascribed to its"zero dead mass"*** paired with commercial activated carb on as the cathode and commercial hard carbon as the ano de,the constructed pouch-type SICs exhibit high energy and power densities of 91.7 Wh/kg and 13.1 kW/kg,*** work shows a prospect of realizing the safe and low-cost manufacturing for high-performance SICs commercially.

关键词： Presodiation material Sacrificial salt high efficiency Zero dead mass Sodium-ion capacitors Lithium-ion capacitors

A high-efficiency separation process of Fe and Zn from zinc-bearing dust by direct reduction

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Journal of Iron and Steel Research International 2022年第10期29卷 1559-1572页

作者： Ding-zheng Wang De-qing Zhu Jian Pan Zheng-qi Guo Hong-yu Tian Yu-xiao Xue School of Minerals Processing and Bioengineering Central South UniversityChangsha410083HunanChina

It is urgent to dispose of zinc-bearing dust from steel plants,and direct reduction process is an effective method to remove hazardous metals and recycle iron from the *** reduction behavior of carbon-containing pellets which were made from three kinds of zinc-bearing dust was *** the pellets were reduced at 1200℃ for 50 min,the reduced pellets with cold compressive strength of 1164 N pellet−1 and Zn contenthigher temperatures are required for the reduction of spinel phase(zinc ferrite)and olivine phase(hedenbergite).The generation and growth of metallic iron bridges could significantly increase the compressive strength of reduced *** iron oxide reduction in the carbon-containing pellets followed the uniform internal reduction model and possessed a high apparent reaction rate,which can improve energy utilization rate and production efficiency.

关键词： Zinc-bearing dust Reduction mechanism Kinetics high efficiency Direct reduction

Breeding of National Authorized New Wheat Variety Shannong 116 and Supporting Cultivation Technical Measures for high Yield, high Quality and high efficiency

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Plant Diseases and Pests 2023年第3期14卷 19-21,26页

作者： Yanxun WANG Jichun TIAN Ming YANG Li PENG Shandong Tianze Taitian Seed Technology Co. Ltd.Tai an 271000China Shandong Huatian Agricultural Technology Co. Ltd.Feicheng 271604China

Shannong 116 is a strong gluten,high yield and multi-resistance wheat variety bred by Shandong Agricultural University,which was approved by the State in 2021 and by Shandong Province in *** 116 combines the excellent characteristics of the female parent(strong gluten,disease resistance and early maturity)and the male parent(high yield,water saving and lodging resistance),with a plant height of 76.9 cm,compact plant type,orderly spike layer and good maturity performance,which is suitable for large-scale promotion and market order planting in Huanghuai wheat *** this paper,the characteristics of Shannong 116 are analyzed,and cultivation technical measures for high yield,high quality and high efficiency are put forward,in order to provide a technical support for the popularization and application of the variety.

关键词： National authorized wheat Shannong 116 Breeding high yield high quality high efficiency Cultivation measures

Enabling high-efficiency ethanol oxidation on NiFe-LDH via deprotonation promotion and absorption inhibition

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Journal of Energy Chemistry 2023年第10期85卷 76-82,I0004页

作者： Jiawei Shi Huawei He Yinghua Guo Feng Ji Jing Li Yi Zhang Chengwei Deng Liyuan Fan Weiwei Cai Hydrogen Energy Technology Innovation Center of Hubei Province Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power SourcesShanghai 200245China College of Science and Engineering James Cook University1 James Cook DriveTownsvilleQLD 4811Australia

Nucleophile oxidation reaction(NOR), represented by ethanol oxidation reaction(EOR), is a promising pathway to replace oxygen evolution reaction(OER). EOR can effectively reduce the driving voltage of hydrogen production in direct water splitting. In this work, large current and high efficiency of EOR on a Ni, Fe layered double hydroxide(NiFe-LDH) catalyst were simultaneously achieved by a facile fluorination strategy. F in NiFe-LDH can reduce the activation energy of the dehydrogenation reaction, thus promoting the deprotonation process of NiFe-LDH to achieve a lower EOR onset potential. It also weakens the absorption of OH-and nucleophile electrooxidation products on the surface of NiFe-LDH at a higher potential, achieving a high current density and EOR selectivity, according to density functional theory calculations. Based on our experiment results, the optimized fluorinated NiFe-LDH catalyst achieves a low potential of 1.386 V to deliver a 10 mA cm^(-2)EOR. Moreover, the Faraday efficiency is greater than 95%, with a current density ranging from 10 to 250 mA cm^(-2). This work provides a promising pathway for an efficient and cost-effective NOR catalyst design for economic hydrogen production.

关键词： Ethanol oxidation reaction high efficiency Ni Fe layered double hydroxide Fluorination strategy Deprotonation

A Novel All-pMOS AC to DC Charge Pump with high efficiency

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Journal of Semiconductors 2008年第4期29卷 660-662页

作者：蒋波韡王肖闵昊复旦大学专用集成电路与系统国家重点实验室上海201203

A novel AC to DC charge pump with high performance is presented. Due to the pMOS structure and threshold voltage canceling technology, the efficiency and the output voltage are greatly improved. Test results show that the output voltage and power efficiency are improved by 125% and 104% respectively at 13.56MHz for a 1V sinusoidal input compared to the traditional MOS diodes structure.

关键词： rectifier charge pump high efficiency

Solar-driven high-efficiency remediation of wastewater containing small dye molecules

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Science China(Technological Sciences) 2021年第10期64卷 2237-2245页

作者： WANG ZuBin LIU Kang HENG LiPing JIANG Lei Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bio-Inspired Energy Materials and DevicesSchool of ChemistryBeihang UniversityBeijing 100191China

Remediation of wastewater containing dye molecules is necessary to alleviate the significant threat that poses to human health and the *** treatment technologies are seriously limited by their low efficiency for removing small dye molecules or/and inferior ***,we report a bio-inspired,solar-driven,regenerable separation device capable of separating small dye molecules from the wastewater with high *** device is composed of porous super-hydrophilic ceramic and carbon nanotubes(CNTs).In comparison with previously reported systems,the resultant device not only achieved a highly promising separation efficiency of>99%for dye-containing wastewater,even for small dye molecules(<1.25 nm),but also demonstrated excellent separation stability and strong resistance to acid/***,the device demonstrated impressive regenerability on simple calcination and re-coating of the CNT layer after it was *** novel separation device shows potential for application in many fields,such as dye separation,wastewater purification and desalination.

关键词： dye separation wastewater purification solar-driven remediation high efficiency regenerability

Brominated PEAI as Multi-Functional Passivator for high-efficiency Perovskite Solar Cell

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Energy & Environmental Materials 2023年第3期6卷 50-57页

作者： Minghao Li Junjie Zhou Liguo Tan Yue Liu Siyang Wang Chaofan Jiang Hang Li Xing Zhao Xingyu Gao Wolfgang Tress Liming Ding Chenyi Yi State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteChinese Academy of ScienceShanghai 201800China Institute of Computational Physics Zurich University of Applied SciencesWinterthur 8401Switzerland Center of Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

The interfaces of perovskite solar cells(PSCs)are well known to be rich in deep-level carrier traps,which serve as non-radiative recombination centers and limit the open-circuit voltage(Voc)and power conversion efficiency(PCE)of *** chemistry and surface passivators have been researched extensively and mainly focused on the neutralization of uncoordinated lead or anion ***,a novel brominated passivator 2-bromophenethylammonium iodide(2-Br-PEAI)is introduced for a multi-functional passivation effect at the perovskite *** brominated species readily form 2D perovskite on top of the 3D perovskite and multi-interact with the 3D perovskite *** from the halide vacancy filling and anion bonding ability,the Br atoms on the benzene ring can interact with the FA cations via strong hydrogen bonding N-H…Br and interact with the[PbI_(6)]^(4−)inorganic *** interface defects in the PSCs are well passivated,minimizing non-radiative recombination and enhancing device *** a result,a champion PCE of 24.22%was achieved with high V_(oc)and fill *** addition,modified devices also showed enhanced operational stability(retention of>95%initial PCE after 400 h)and humidity resistance(>90%initial PCE maintained after 1500 h under~50%RH).

关键词： brominated PEAI high efficiency perovskite solar cell surface passivation

A 10 GHz high-efficiency and low phase-noise negative-resistance oscillator optimized with a virtual loop model

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Journal of Semiconductors 2009年第11期30卷 75-78页

作者：王显泰金智吴旦昱申华军刘新宇 Institute of Microelectronics Chinese Academy of Sciences

A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In this work, the virtual loop described the original circuit successfully and the optimizations were effective. A 10 GHz high-efficiency low phase-noise oscillator utilizing an InGaP/GaAs HBT was achieved. The 10.028 GHz oscillator delivered an output power of over 15 dBm with a phase-noise of lower than -107 dBc/Hz at 100 kHz offset. The efficiency of DC to RF transformation was 35 %. The results led to a good oscillator figure of merit of-188 dBc/Hz. The measurement results agreed well with those of the simulations.

关键词： oscillator InGaP/GaAs HBT low phase-noise high efficiency virtual loop transmission analysis with virtual ground

high-efficiency S-band harmonic tuning GaN amplifier

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Chinese Physics B 2014年第3期23卷 504-508页

作者：曹梦逸张凯陈永和张进成马晓华郝跃 Key Laboratory for Wide Band-Gap Semiconductor Materials and Devices School of Microelectronics Xidian University School of Technical Physics Xidian University

In this paper, we present a high-efficiency S-band gallium nitride （GaN） power amplifier （PA）. This amplifier is fabri- cated based on a self-developed GaN high-electron-mobility transistor （HEMT） with 10 mm gate width on SiC substrate. Harmonic manipulation circuits are presented in the amplifier. The matching networks consist of microstrip lines and discrete components. Open-circuited stub lines in both input and output are used to tune the 2rid harmonic wave and match the GaN HEMT to the highest efficiency condition. The developed amplifier delivers an output power of 48.5 dBm （70 W） with a power-added efficiency （PAE） of 72.2% at 2 GHz in pulse condition. When operating at 1.8-2.2 GHz （20% relative bandwidth）, the amplifier provides an output power higher than 48 dBm （,-~ 65 W）, with a PAE over 70% and a power gain above 15 dB. When operating in continuous-wave （CW） operating conditions, the amplifier gives an output power over 46 dBm （40 W） with PAE beyond 60% over the whole operation frequency range.

关键词： power amplifier GaN high-electron-mobility transistor (HEMT) high efficiency harmonic manipulation