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Recent advances towards aqueous hydrogen peroxide formation in a direct current plasma-liquid system

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High Voltage 2022年第3期7卷 405-419页

作者： Qiang Chen junshuai li Qiang Chen Kostya(Ken)Ostrikov Shenzhen Research Institute of Xiamen University Institute of Electromagnetics and AcousticsFujian Provincial Key Laboratory of Plasma and Magnetic ResonanceKey Laboratory of Electromagnetic Wave Science and Detection TechnologyXiamen UniversityXiamenChina LONGi Institute of Future Technology and School of Materials&Energy Lanzhou UniversityLanzhouChina Laboratory of Plasma Physics and Materials Beijing Institute of Graphic CommunicationBeijingChina School of Chemistry and Physics and QUT Centre for Materials Science Queensland University of Technology(QUT)BrisbaneQueenslandAustralia

The aqueous phase hydrogen peroxide(H_(2)O_(2aq))produced from the plasma-liquid interactions can directly or synergistically(with other substances)affect the liquid chemistry,and therefore it is important to unfold the H_(2)O_(2aq)formation ***,up to now,a consensus on the H_(2)O_(2aq)formation mechanism is not *** review aims to survey the recent advances on the understanding of the H_(2)O_(2aq)formation mechanism in the system of a direct current discharge plasma operated over a liquid *** and experimental analyses indicate that the recombination of dissolved OH radicals(OHaq)is the dominant process for the H_(2)O_(2aq)formation,while the purported plasma-induced photolysis of water and the dissolution of gaseous H_(2)O_(2)are ruled out.

关键词： hydrogen liquid system

Flexible lithium metal capacitors enabled by an in situ prepared gel polymer electrolyte

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Chinese Chemical Letters 2021年第11期32卷 3496-3500页

作者： Qizhi Zhong Bao liu Bingjun Yang Yali li junshuai li Xingbin Yan Key Laboratoy of Special Function Materials Structure Design of the Ministry of Education and School of Materials&EnergyLanzhou UniversityLanzhou 730000China Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

The rapid development of next-generation flexible electronics stimulates the growing demand for flexible and wearable power sources with high energy *** metal capacitor(LMC),combining with a li metal anode and an activated carbon cathode,exhibits extremely high energy density and high power density due to the unique energy storage mechanism,thus showing great potential for powering wearable electronic ***,a flexible LMC based on an in situ prepared PETEA-based gel polymer electrolyte(GPE)was reported for the first *** to the high ionic conductivity of PETEA-based GPE(5.75×10^(−3)S/cm at 20℃),the assembled flexible LMC delivers a high capacitance of 210 F/g at 0.1 A/g within the voltage range from 1.5 V to 4.3 V ***/li^(+),a high energy density of 474 Wh/kg at 0.1 A/g and a high power density of 29 kW/kg at 10 A/*** importantly,PETEA-based GPE endows the LMC with excellent flexibility and safety,which could work normally under abuse tests,such as bending,nail penetration and *** in situ prepared PETEA-based GPE simplifies the fabrication process,avoids the risk of leakage and inhibits the growth of li dendrite,making LMC a promising flexible energy storage device for the flexible electronic field.

关键词： lithium metal capacitor In situ prepared gel polymer electrolyte Flexible Energy density Power density

Facile synthesis of NiMn2S4 nanoflakes on nickel foam for high-performance aqueous asymmetric supercapacitors

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Science China(Technological Sciences) 2024年第2期67卷 499-508页

作者： ADIL Emin li Yali GAO Zhe DONG YunXia li DongHao CHEN YongChao FU YuJun HE DeYan li junshuai LONGi Institute of Future Technology and School of Materials&EnergyLanzhou UniversityLanzhou 730000China

Supercapacitors display promising electrochemical performance with high power density and excellent cycle ***,their low energy density limits their advancement in a broader range of *** enhance their energy density,we proposed self-assembled spinel NiMn2S4nanoflakes grown on nickel foam which we successfully prepared by a facile hydrothermal *** NiMn2S4electrode delivers a high capacitance of 2096.7 F g^(-1)at 1.0 A g^(-1),with an exceptional rate capability(~720.6 F g^(-1)at a very high current density of 100 A g^(-1))and good cycle stability(~85.1%retention of the initial capacitance after 7000 cycles with the Coulombic efficiency around 100%).The as-fabricated asymmetric supercapacitors based on NiMn2S4nanoflakes//active carbon demonstrate an energy density of 73.6 W h kg^(-1)at 800.5 W kg^(-1)and adequate cycling performance of~84.6%capacitance retention at 15 A g^(-1)after 10000 *** results reveal that the nanostructured NiMn2S4is an excellent electrode material for high-performance energy storage applications.

关键词： NiMn2S4 nanostructure high capacitance aqueous supercapacitors long cycle stability high energy density

MXenes for Solar Cells

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Nano-Micro Letters 2021年第5期13卷 90-106页

作者： Lujie Yin Yingtao li Xincheng Yao Yanzhou Wang lin Jia Qiming liu junshuai li Yali li Deyan He Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education and School of Physical Science and TechnologyLanzhou University222 South Tianshui RoadLanzhou 730000People’s Republic of China

Application of two-dimensional MXene materials in photovoltaics has attracted increasing attention since the first report in 2018 due to their metallic electrical conductivity,high carrier mobility,excellent transparency,tunable work function and superior mechanical *** this review,all developments and applications of the Ti3C2Tx MXene(here,it is noteworthy that there are still no reports on other MXenes’application in photovoltaics by far)as additive,electrode and hole/electron transport layer in solar cells are detailedly summarized,and meanwhile,the problems existing in the related studies are also *** view of these problems,some suggestions are given for pushing exploration of the MXenes’application in solar *** is believed that this review can provide a comprehensive and deep understanding into the research status and,moreover,helps widen a new situation for the study of MXenes in photovoltaics.

关键词： Ti3C2Tx MXene Solar cells Additives Hole/electron transport layers Electrodes

Effect of rGO Coating on Interconnected Co_3O_4 Nanosheets and Improved Supercapacitive Behavior of Co_3O_4/rGO/NF Architecture

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Nano-Micro Letters 2017年第4期9卷 11-18页

作者： Tinghui Yao Xin Guo Shengchun Qin Fangyuan Xia Qun li Yali li Qiang Chen junshuai li Deyan He Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education and School of Physical Science and TechnologyLanzhou University Institute of Electromagnetics and Acoustics Department of Electronic Science and Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Xiamen University

In this study, the effect of reduced graphene oxide(rGO) on interconnected Co_3O_4 nanosheets and the improved supercapacitive behaviors is reported. By optimizing the experimental parameters, we achieved a specific capacitance of ~1016.4 F g^(-1) for the Co_3O_4/rGO/NF(nickel foam) system at a current density of 1 A g^(-1). However, the Co_3O_4/NF structure without rGO only delivers a specific capacitance of ~520.0 F g^(-1)at the same current density. The stability test demonstrates that Co_3O_4/rGO/NF retains ~95.5% of the initial capacitance value even after 3000 charge–discharge cycles at a high current density of 7 A g^(-1). Further investigation reveals that capacitance improvement for the Co_3O_4/rGO/NF structure is mainly because of a higher specific surface area(~87.8 m^2g^(-1))and a more optimal mesoporous size(4–15 nm) compared to the corresponding values of 67.1 m^2g^(-1) and 6–25 nm,respectively, for the Co_3O_4/NF structure. rGO and the thinner Co_3O_4 nanosheets benefit from the strain relaxation during the charge and discharge processes, improving the cycling stability of Co_3O_4/rGO/NF.

关键词： Supercapacitors rGO Co3O4 nanosheets Strain relaxation

High-performance aqueous asymmetric supercapacitors based on the cathode of one-step electrodeposited cracked bark-shaped nickel manganese sulfides on activated carbon cloth

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Science China(Technological Sciences) 2022年第2期65卷 293-301页

作者： ADIL Emin XIE WenLu LONG Xiao WANG Xiao SONG XiaoQiang CHEN Yue FU YuJun li junshuai li Yali HE DeYan Key Laboratory of Special Function Materials&Structure Design of the Ministry of Education and School of Materials&EnergyLanzhou UniversityLanzhou 730000China

In this work,we report a high-performance self-standing supercapacitor electrode of mixed nickel manganese sulfides (NMSs)with a cracked-bark shape grown by one-step electrochemical deposition on activated carbon cloth (ACC).The electrode possesses outstanding electrochemical properties,including a high specific capacitance of up to 3142.8 F g^(-1)at 1.0 A g^(-1),the high-rate performance (~1206.8 F g^(-1)at 60.0 A g^(-1)),and cycle stability (~92.3%capacitance retention after 8000 cycles at8 A g^(-1)).An asymmetric supercapacitor assembled using NMSs on ACC as the cathode,activated carbon on carbon cloth as the anode and 1.0 mol L;KOH as the electrolyte delivers a high energy density of 111.2 W h kg^(-1)at 800.0 W kg^(-1)and the prominent cycling performance of~93.2%capacitance retention after 10000 cycles at 5 A g^(-1)with the Columbic efficiency of around 100%during these 10000 *** high performance and facile preparation indicate that the NMSs on ACC hold a huge potential as the electrode for supercapacitors.

关键词： aqueous asymmetric supercapacitors nickel manganese sulphides high specific capacitance high energy density long cycle stability

Enhancement of photoelectric performance for CsPbI2Br solar cells by the synergistic effect of binary additives

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Journal of Materiomics 2023年第1期9卷 27-34页

作者： Qiulu Chen like lin Yanzhou Wang Zhe Gao Yujun Fu Qiming liu junshuai li Deyan He School of Materials and Energy LONGi Institute of Future TechnologyLanzhou UniversityLanzhou730000China College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China

CsPbI_(2)Br-based perovskite solar cells(PSCs)have attracted much attention because of their excellent phase stability and appropriate ***,numerous defects of undercoordinated ions or mobile species are the sites of carrier nonradiative recombination,causing a low power conversion efficiency(PCE).In this work,NaCl and nitrogen-doped graphene quantum dots(N-GQDs)as binary additives are introduced into perovskite precursor to obtain high-quality photoactive *** ion(Cl^(-))is incorporated into perovskite due to the same physical and chemical properties as bromine(Br^(-)),that align the energy level of CsPbI_(2)Br,decrease the energy barrier between perovskite and P3HT to promote carrier transport and extraction,hence result in the reduced energy ***,because of its good conductivity,N-GQDs at grain boundaries can rapidly conduct photogenerated electrons to SnO_(2),suppressing carrier recombination at grain ***,the trap state density of the CsPbI_(2)Br film with binary additives is reduced,which could prolong the carrier lifetime,and improve surface *** a result,a PCE of 15.37%for CsPbI_(2)Br PSCs with binary additives is obtained,which shows~22.76%relative increment compare with the pristine ***,a simple and convenient optimization strategy of binary additives for PSCs is proposed in this work.

关键词： All-inorganic perovskite solar cells Synergistic effect Carrier transport Binary additives engineering

Improved comprehensive performance of CsPbI_(2) Br perovskite solar cells by modifying the photoactive layers with carbon nanodots

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Journal of Materiomics 2022年第2期8卷 358-365页

作者： Yanzhou Wang Caidong Xie Xincheng Yao Qiulu Chen Weining liu Yujun Fu Qiming liu junshuai li Yali li Deyan He Key Laboratory of Special Function Materials&Structure Design of the Ministry of Education And School of Materials&EnergyLanzhou University222 South Tianshui RoadLanzhou730000China

Introducing additives into perovskite layers is an effective method to enhance the power conversion efficiency(PCE)and operation stability of perovskite solar cells(PSCs).Herein,we reported an addition of carbon nanodots(CNDs)into the CsPbI_(2) Br photoactive layer to boost performance of the related *** is found that the trap density can be notably suppressed,and the crystallinity can be enhanced after introducing CNDs with an optimal *** PSC with 1.0 wt%addition of CNDs delivers a notable improved average PCE of 13.77%(the highest PCE:14.69%)from that of 12.14%for the control device without CND ***,the CND-added CsPbI 2 Br PSCs exhibit superior stability,i.e.,~86% retention of the initial PCE after 160 h aging in air with the humidity of 20%-30%,to the control device.

关键词： CsPbI_(2)Br perovskite Solar cells Carbon nanodots Power conversion efficiency Stability

Electron field emission from nano-crystalline Si films deposited by inductively coupled plasma CVD at room temperature

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Chinese Science Bulletin 2006年第5期51卷 510-514页

作者： HE Deyan WANG Xiaoqiang CHEN Qiang li junshuai YIN Min A. V. Karabutov A. G. Kazanskii Department of Physics Lanzhou University Lanzhou 730000 China General Physics Institute Vavilova str. 38 iv119991 Moscow Russia Moscow State University Vorobyevy Gori 119992 Moscow Russia

硅薄电影被诱导地联合的血浆 CVD 在房间温度扔。拉曼光谱和原子力量显微镜学被用来描绘样品的结构和地形学。在最佳血浆条件下面， nano-crystallineSi 电影与在表面上的随机的分布的高密度的 Si 尖端是成年的，这被显示出。高度和 Si... 详细信息

硅薄电影被诱导地联合的血浆 CVD 在房间温度扔。拉曼光谱和原子力量显微镜学被用来描绘样品的结构和地形学。在最佳血浆条件下面， nano-crystallineSi 电影与在表面上的随机的分布的高密度的 Si 尖端是成年的，这被显示出。高度和 Si 尖端的吝啬的基础直径分别地是 30-40 nm 和约 200 nm。有如此的表面地形学的电影被表明有电子领域排放的好行为。典型阀值地关于 7-10 V/mu m。

关键词：纳米晶硅薄膜电子场发射感应耦合等离子体化学气相沉积低温生长 ICP-CVD