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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 cycles.The 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

泡沫镍上生长的具有三明治纳米结构的MnCo_(2)O_(4)@NiCoMnS_(4)用于高性能水系非对称超级电容器

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Science China Materials 2024年第3期67卷 816-823页

作者：陈勇超李亚丽董云霞李东昊沈思锦胡继东付玉军贺德衍栗军帅 LONGi Institute of future Technology and School of Materials&EnergyLanzhou UniversityLanzhou 730000China

本文介绍了一种由水热生长的MnCo_(2)O_(4)(MCO)纳米线以及随后电沉积的NiCoMnS_(4)(NCMS)纳米片组成的高性能超级电容器电极材料,即泡沫镍上生长的MCO@NCMS.由于其多孔和互联的纳米结构以及MCO和NCMS的协同效应,在1 mA cm^(-2)处实现了... 详细信息

本文介绍了一种由水热生长的MnCo_(2)O_(4)(MCO)纳米线以及随后电沉积的NiCoMnS_(4)(NCMS)纳米片组成的高性能超级电容器电极材料,即泡沫镍上生长的MCO@NCMS.由于其多孔和互联的纳米结构以及MCO和NCMS的协同效应,在1 mA cm^(-2)处实现了12,020.8 mF cm^(-2)的高电容,并展现出良好的倍率性能以及循环稳定性.电化学测试表明,组装成的水性非对称超级电容器在0.800 mW cm^(-2)的功率密度下,达到0.611 mW h cm^(-2)的高能量密度并具有良好的循环稳定性,即在15,000次充放电循环后,容量保持率可达90%,且保持100%的库仑效率.

关键词： sandwich structure high energy density transition metal sulfides aqueous asymmetric supercapacitor transition metal oxides

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 bandgap.However,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 films.Chloride 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 loss.Meanwhile,because of its good conductivity,N-GQDs at grain boundaries can rapidly conduct photogenerated electrons to SnO_(2),suppressing carrier recombination at grain boundaries.furthermore,the trap state density of the CsPbI_(2)Br film with binary additives is reduced,which could prolong the carrier lifetime,and improve surface morphology.As 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 PSCs.Therefore,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 PSCs.It is found that the trap density can be notably suppressed,and the crystallinity can be enhanced after introducing CNDs with an optimal quantity.The 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 addition.Moreover,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

Cu_2ZnSnS_4 thin films prepared by sulfurization of ion beam sputtered precursor and their electrical and optical properties

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Rare Metals 2006年第Z1期25卷 315-319页

作者： ZHANG Jun SHAO Lexi fu yujun XIE Erqing School of Physics Science and Technology Zhanjiang Normal University Zhanjiang 524048 China School of Physics Science and Technology Lanzhou University Lanzhou 730000 China School of Physics Science and Technology Zhanjiang Normal University Zhanjiang 524048 China School of Physics Science and Technology Lanzhou University Lanzhou 730000 China School of Physics Science and Technology Lanzhou University Lanzhou 730000 China

Cu2ZnSnS4 (CZTS) thin films were successfully prepared by sulfurization of ion bean sputtered precursors on soda-lime glass substrate. The single phase of stannite-type structure CZTS films were obtained as revealed in EDS and XRD analysis when the ratios of the constituents of CZTS thin films are close to stoichiometric by optimizing the conditions of precursor preparation and sulfurization. A low sheet resistivity as about 0.156 Ω·cm and a high absorption coefficient as 1×104 cm-1 were achieved in this method by Hall effect measurements and UV-VIS spectrophotometer. The optical band-gap energy of the CZTS sample is about 1.51 eV, which is very close to the optimum value for a solar-cell absorber.

关键词： Cu2ZnSnS4 thin film solar-cell ion beam sputtering

Desiccation and osmotic resistance mechanism of Cronobacter spp. isolated from powdered infant formula

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Food Science and Human Wellness 2024年

作者： Shiqian fu Danliangmin Song Xue Qin Lihan Wang Qianyu Zhao Chaoxin Man Xinyan Yang yujun Jiang Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition College of Food and Pharmaceutical Sciences Ningbo University Key Laboratory of Dairy Science Ministry of Education Department of Food Science Northeast Agricultural University

Cronobacter spp. has strong resistance to desiccation and high permeability in Enterobacteriaceae， and powdered infant formula (PIF) is one of the main contamination routes. In recent years， the contamination of Cronobacter spp. in PIF incidents occur from time to time， causing infant serious diseases or death. In this investigation， matrix-assisted laser desorption/ionization time of flight mass spectrometry was used to identify the phenotypes of 35 Cronobacter strains isolated from PIF and its processing environment. Subsequently， the isolates were evaluated for drying and osmotic pressure tolerance. The results showed that the deactivation rate of the strains ranged from 9.01% to 77.57%， and the highest osmotic pressure condition the strains could tolerate was 6% NaCl. In addition， there was a positive correlation between biofilm formation ability and desiccation resistance. Combined with transcriptomics， Cronobacter spp. can activate biofilm synthesis， produce more trehalose， accumulate betaine and electrolytes to stabilize intracellular structure under the two treatment conditions. 31 and 43 genes were found related to desiccation and permeability resistance， respectively. And some genes (cysM， thuF， ycjO， et al) were found to be associated with two tolerances for the first time.

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清代东北方志中的辽金史料编纂——以《盛京通志》《吉林通志》为例

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史学史研究 2024年第1期 105-114页

作者：李玉君付亚洲辽宁师范大学历史文化学院辽宁大连116081

清代东北方志中辑录了大量辽金史料,堪称辽金资料汇编。特别是《盛京通志》《吉林通志》,二者分别作为清代东北地区总志和吉林一省通志,其中所包含的辽金史料颇具代表性。两志中的辽金史料存在着显著特点:首先,搜集范围广,兼取各类文献... 详细信息

清代东北方志中辑录了大量辽金史料,堪称辽金资料汇编。特别是《盛京通志》《吉林通志》,二者分别作为清代东北地区总志和吉林一省通志,其中所包含的辽金史料颇具代表性。两志中的辽金史料存在着显著特点:首先,搜集范围广,兼取各类文献且涉及朝代众多,所得辽金史料内容广博;其次,对数量大、内容繁富的辽金史料重新分门别类、取舍编排;第三,注重考证,体现了乾嘉考据学风。同时也存在着选材片面、内容不均、史料删减不当、史实编写错误以及一些具体细节问题。综合看来,清代方志中的辽金史料是多维度反映辽金史料面貌的有益成果。它们具有重要的史料价值和文献价值的同时,也展现了清人的辽金史观和东北的地域特点,是清代辽金史学史发展的一个侧面。

关键词：清代东北方志辽金史料《盛京通志》《吉林通志》

原位氧化Zn_3N_2制备p型ZnO薄膜的性能研究

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物理学报 2007年第8期56卷 4914-4919页

作者：张军谢二庆付玉军李晖邵乐喜兰州大学物理科学与技术学院兰州730000 湛江师范学院物理科学与技术学院湛江5240481

采用射频反应溅射法在玻璃衬底上制备Zn3N2薄膜,然后向真空室中通入纯氧气进行热氧化制备ZnO薄膜.利用X射线衍射、扫描电子显微镜、霍尔效应测量、透射光谱和光致发光光谱等表征技术,研究了氧化温度和氧化时间对ZnO薄膜的结晶质量、电... 详细信息

采用射频反应溅射法在玻璃衬底上制备Zn3N2薄膜,然后向真空室中通入纯氧气进行热氧化制备ZnO薄膜.利用X射线衍射、扫描电子显微镜、霍尔效应测量、透射光谱和光致发光光谱等表征技术,研究了氧化温度和氧化时间对ZnO薄膜的结晶质量、电学性质和光学性能的影响.研究结果显示,450℃下氧化2h后的样品中除含有ZnO外,还有Zn3N2成分,500℃下氧化2h可以制备出电阻率为0.7Ωcm,空穴载流子浓度为1017cm-3,空穴迁移率为0.9cm2/Vs的具有c轴择优取向的p型ZnO薄膜.此时的ZnO薄膜具有良好的光学特性,紫外可见光范围内透过率为85%,处于紫外区域的激子复合产生的发光峰很强,且半高宽较窄,而处于可见光部分来自于深能级发射的绿色发光峰很弱.这种工艺制备的ZnO薄膜质量较好,有利于实现在短波长光电器件方面的应用.

关键词： p型ZnO薄膜 Zn3N2 薄膜射频溅射原位氧化

溶液法制备硅/SnCl_(2)处理的Ti_(3)C_(2)T_(x) MXene肖特基结太阳电池

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Science China Materials 2022年第4期65卷 896-903页

作者：姚鑫城尹鲁杰王艳周刘卫宁谢才东刘奇明付玉军李亚丽栗军帅贺德衍 Key Laboratory of Special function Materials&Structure Design of Ministry of Education and School of Materials&EnergyLanzhou UniversityLanzhou730000China

非掺杂异质结晶硅太阳电池是目前光伏领域的一个研究热点.本文通过简单的滴涂工艺,并经自然干燥制备了一种基于Ti_(3)C_(2)T_(x) MXene/n-Si肖特基结的新型光伏电池.此非掺杂异质结光伏电池在标准AM 1.5G模拟太阳光下短路电流密度为20.6... 详细信息

非掺杂异质结晶硅太阳电池是目前光伏领域的一个研究热点.本文通过简单的滴涂工艺,并经自然干燥制备了一种基于Ti_(3)C_(2)T_(x) MXene/n-Si肖特基结的新型光伏电池.此非掺杂异质结光伏电池在标准AM 1.5G模拟太阳光下短路电流密度为20.68 mA cm^(−2),开路电压为0.530 V,填充因子为52.0%,光电转换效率达到了5.70%.新型Ti_(3)C_(2)T_(x) MXene/n-Si肖特基结光伏电池具有简单的器件结构和简便的制备工艺.通过异质结界面改良,二维材料性能改善等都可大幅提高其光电转换性能.经SnCl_(2)水系溶液对MXene层进行处理后,器件光电转换效率进一步提升至6.95%(J_(sc)=23.04 mA cm^(−2),V_(oc)=0.536 V,FF=56.2%).经处理后的MXene层,可以有效减少光反射并提高光吸收.SnCl_(2)水系溶液的处理,还能进一步改善异质结质量及MXene层与顶电极的接触,进而通过抑制载流子复合提高载流子寿命.

关键词： Ti_(3)C_(2)T_(x)MXene silicon solar cells Schottky junction drop-casting