检索结果-南通市图书馆

Electrocatalysis induced reconstruction of RuNiPO for highly efficient hydrogen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第12期87卷 24-31,I0003页

作者： Junhui Hu bai Xu Jiabin Xu shuo li Zhonghu liu Cheng Lu Yong feng Kun feng Jun Zhong Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123JiangsuChina Department of Chemistry University of Western OntarioLondonOntario N6A 5B7Canada

Reconstruction during the catalytic process has been considered to play a key role for the *** we report a RuNiPO based catalyst for efficient alkaline hydrogen evolution reaction(HER),which can benefit from a long-term reconstruction during HER for 10 h to continuously increase the *** final catalyst(e-RuNiPO)shows a huge morphology change from bulk sphere to highly exposed layered structure in the electrocatalysis process,and exhibits an interesting electronic structure modification with the electron transfer from Ru to Ni for better interfacial interaction and quick charge *** to the favorable morphology with more exposed active sites and the optimized electronic structure,the final catalyst can achieve an outstanding performance with only an overpotential of 15 mV at 10 mA cm^(-2)(with a good stability more than 100 h),even outperforming the performance of benchmark 20 wt%Pt/C catalyst(18 mV at 10 mA cm^(-2))by using a much lower Ru content.

关键词： Electrocatalyst Electrochemical reconstruction Hydrogen evolution reaction X-ray absorption spectroscopy

Engineering homotype heterojunctions in hard carbon to induce stable solid electrolyte interfaces for sodium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2023年第1期5卷 181-193页

作者： Chengxin Yu Yu li Haixia Ren Ji Qian shuo Wang Xin feng Mingquan liu Ying bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingPeople's Republic of China Yangtze Delta Region Academy of Beijing Institute of Technology JiaxingPeople's Republic of China Department of Materials Science and Engineering Peking UniversityBeijingPeople's Republic of China

Developing effective strategies to improve the initial Coulombic efficiency(ICE)and cycling stability of hard carbon(HC)anodes for sodium-ion batteries is the key to promoting the commercial application of *** this paper,homotype heterojunctions are designed on HC to induce the generation of stable solid electrolyte interfaces,which can effectively increase the ICE of HC from 64.7%to 81.1%.The results show that using a simple surface engineering strategy to construct a homotypic amorphous Al_(2)O_(3) layer on the HC could shield the active sites,and further inhibit electrolyte decomposition and side effects ***,due to the suppression of continuous decomposition of NaPF 6 in ester-based electrolytes,the accumulation of NaF could be reduced,leading to the formation of thinner and denser solid electrolyte interface films and a decrease in the interface *** HC anode can not only improve the ICE but elevate its sodium storage performance based on this homotype heterojunction composed of HC and Al_(2)O_(3).The optimized HC anode exhibits an outstanding reversible capacity of 321.5mAhg^(−1) at 50mAg^(−1).The cycling stability is also improved effectively,and the capacity retention rate is 86.9%after 2000 cycles at 1Ag^(−1) while that of the untreated HC is only 52.6%.More importantly,the improved sodium storage behaviors are explained by electrochemical kinetic analysis.

关键词： hard carbon anodes homotype heterojunctions sodium-ion batteries solid electrolyte interface surface engineering

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

磷酸亚铁锂核壳结构材料的制备和电化学性能

材料研究学报 2009年第1期23卷 22-26页

作者：刘树和闻雷白朔李峰王作明中国科学院金属研究所沈阳材料科学国家(联合)实验室沈阳110016

制备热解炭/磷酸亚铁锂和纳米炭纤维/磷酸亚铁锂核壳结构材料,研究了电化学性能.结果表明,热解炭和纳米炭纤维包覆层能有效地降低磷酸亚铁锂材料的电阻率,大大提高材料的充放电容量和循环稳定性.与热解炭相比,纳米炭纤维具有一维结构和... 详细信息

制备热解炭/磷酸亚铁锂和纳米炭纤维/磷酸亚铁锂核壳结构材料,研究了电化学性能.结果表明,热解炭和纳米炭纤维包覆层能有效地降低磷酸亚铁锂材料的电阻率,大大提高材料的充放电容量和循环稳定性.与热解炭相比,纳米炭纤维具有一维结构和优异的力学性能,更适于作为磷酸亚铁锂电极材料的高效导电剂.

关键词：无机非金属材料磷酸亚铁锂流化床电化学性能

化学气相沉积法碳包覆改性锂离子电池电极材料的研究进展

在线全文

学校读者我要写书评

暂无评论

材料导报 2010年第1期24卷 36-41页

作者：刘树和白朔李峰孙可伟昆明理工大学废弃物资源化国家工程研究中心昆明650093 中国科学院金属研究所沈阳材料科学国家(联合)实验室沈阳110016

主要介绍了CVD碳包覆工艺、包覆层种类和物理性质(结构、含量和分布)对电极材料电化学性能(首次容量、首次库仑效率、循环和倍率充放电性能等)的影响,在此基础上提出了尚需深入研究的问题,并对CVD法碳包覆改性电极材料的发展趋势和前景... 详细信息

主要介绍了CVD碳包覆工艺、包覆层种类和物理性质(结构、含量和分布)对电极材料电化学性能(首次容量、首次库仑效率、循环和倍率充放电性能等)的影响,在此基础上提出了尚需深入研究的问题,并对CVD法碳包覆改性电极材料的发展趋势和前景进行了讨论。

关键词：锂离子电池电极材料热解炭纳米碳管化学气相沉积

The Huashan risk calculators performed better in prediction of prostate cancer in Chinese population： a training study followed by a validation study

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2016年第6期18卷 925-929页

作者： Yi-shuo Wu Ning Zhang Sheng-Hua liu Jian-feng Xu Shi-Jun Tong Ye-Hua Cai li-Min Zhang Pei-De bai Meng-Bo HU Hao-Wen Jiang Rong Na Qiang Ding Ying-Hao Sun Department of Urology Huashan Hospital Fudan University Shanghai China Urology Research Center Fudan University Shanghai China Department of Ultrasonic Huashan Hospital Fudan University Shanghai China NorthShore University HeatthSystem Evanston IL USA Department of Urology Changhai Hospital The Second Military Medical University Shanghai China

The performances of the Prostate Cancer Prevention Trial （PCPT） risk calculator and other risk calculators for prostate cancer （PCa） prediction in Chinese populations were poorly understood. We performed this study to build risk calculators （Huashan risk calculators） based on Chinese population and validated the performance of prostate-specific antigen （PSA）, PCPT risk calculator, and Huashan risk calculators in a validation cohort. We built Huashan risk calculators based on data from 1059 men who underwent initial prostate biopsy from January 2006 to December 2010 in a training cohort. Then, we validated the performance of PSA, PCPT risk calculator, and Huashan risk calculators in an observational validation study from January 2011 to December 2014. All necessary clinical information were collected before the biopsy. The results showed that Huashan risk calculators 1 and 2 outperformed the PCPT risk calculator for predicting PCa in both entire training cohort and stratified population （with PSA from 2.0 ng ml^-1 to 20.0 ng ml^-1）. In the validation study, Huashan risk calculator 1 still outperformed the PCPT risk calculator in the entire validation cohort （0.849 vs 0.779 in area under the receiver operating characteristic curve [AUC]） and stratified population. A considerable reduction of unnecessary biopsies （approximately 30%） was also observed when the Huashan risk calculators were used. Thus, we believe that the Huashan risk calculators （especially Huashan risk calculator 1） may have added value for predicting PCa in Chinese population. However, these results still needed further evaluation in larger populations.

关键词： biopsy China prostate cancer prostate-specific antigen risk calculator

Space advanced technology demonstration satellite

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第1期67卷 240-258页

作者： ZHANG Xiaofeng CHEN Wen ZHU XiaoCheng MENG Na HE JunWang BI XingZi ZHANG YongHe SHI Qi li Fei liu Rui feng ZhengGong liu liu li JinSong WU HaiChen XU DongXiao li TaiJie HUANG JiangJiang liu shuo li TianTong YU XianSheng GAO Yang ZHOU Heng BAN HanYu ZHANG Yanli ZHANG YueTing YANG YingQuan HE Tao DUAN Xuliang CHEN Xin WANG YaMin SUN AnTai ZHANG KuoXiang SUN Ying WANG YaoBin FAN ChengCheng XIONG Shaolin li XinQiao WEN XiangYang liNG ZhiXing SUN XiaoJin ZHANG Chen bai XianYong WANG ZhanShan DENG YuanYong TIAN Hui YANG Jianfeng XUE HongBo SANG Peng liu JinGuo ZHENG HuiLong ZHU Xiang HE JianWu li Hui XU LuXiang XU ShuYan CHEN WenWu liu ZhenDong WANG Zhaoli MAO XiangLong GAO Rong li ZongXuan DING GuoPeng WANG XinYu DOU RunJiang WENG LuBin LUO Hao WANG YaPing liANG Xianfeng FANG ZiRuo Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201203China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China National Astronomical Observatory of China Beijing 100101China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Earth and Space Sciences Peking UniversityBeijing 100871China Xi’an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi’an 710119China National Space Science Center Chinese Academy of SciencesBeijing 100190China Shenyang Institute of Automation Chinese Academy of SciencesShenyang 110016China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China Institute of Mechanics Chinese Academy of SciencesBeijing 100190China Shanghai Institute of Organic Chemistry Chinese Academy of SciencesShanghai 200032China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Nanyang Technological University Singapore 569830Singapore Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100049China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China Institute of Automation Chinese Academy of SciencesBeijing 100190China School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310058China

The Space Advanced Technology demonstration satellite(SATech-01),a mission for low-cost space science and new technology experiments,organized by Chinese Academy of Sciences(CAS),was successfully launched into a Sun-synchronous orbit at an altitude of~500 km on July 27,2022,from the Jiuquan Satellite Launch *** as an experimental platform for space science exploration and the demonstration of advanced common technologies in orbit,SATech-01 is equipped with 16 experimental payloads,including the solar upper transition region imager(SUTRI),the lobster eye imager for astronomy(LEIA),the high energy burst searcher(HEBS),and a High Precision Magnetic Field Measurement System based on a CPT Magnetometer(CPT).It also incorporates an imager with freeform optics,an integrated thermal imaging sensor,and a multi-functional integrated imager,*** paper provides an overview of SATech-01,including a technical description of the satellite and its scientific payloads,along with their on-orbit performance.

关键词： SATech-01 spacecraft design scientific instruments on-orbit performance

同方期刊数据库

天然石墨球-热解炭核壳结构的制备及电化学性能研究(英文)

在线全文

学校读者我要写书评

暂无评论

新型炭材料 2008年第1期23卷 30-36页

作者：刘树和英哲王作明李峰白朔闻雷成会明中国科学院金属研究所沈阳材料科学国家(联合)实验室辽宁沈阳110016

通过化学气相沉积的方法,以乙炔为碳源,天然石墨球为原料,采用不同流化床CVD工艺和不同的反应时间,制备出具有光滑表面或颗粒状热解炭包覆层的核-壳构型改性天然石墨球。改性天然石墨球的核体是具有高度有序石墨结构的天然石墨,而壳体... 详细信息

通过化学气相沉积的方法,以乙炔为碳源,天然石墨球为原料,采用不同流化床CVD工艺和不同的反应时间,制备出具有光滑表面或颗粒状热解炭包覆层的核-壳构型改性天然石墨球。改性天然石墨球的核体是具有高度有序石墨结构的天然石墨,而壳体是无序结构的热解炭。与天然石墨球相比,具有核-壳结构的改性天然石墨球的首次库仑效率和循环性能都得到显著改善。尤其是具有颗粒状热解炭包覆层的改性石墨具有优异的循环性能,在41次循环后其放电容量仍为首次容量的84%,这一改善归因于表面沉积的颗粒状热解炭有效地降低了改性天然石墨颗粒之间的接触电阻和增加了接触面积。

关键词：流化床化学气相沉积核-壳结构热解炭改性天然石墨锂离子二次电池

The Solar Upper Transition Region Imager(SUTRI)Onboard the SATech-01 Satellite

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2023年第6期23卷 153-171页

作者： Xianyong bai Hui Tian Yuanyong Deng Zhanshan Wang Jianfeng Yang Xiaofeng Zhang Yonghe Zhang Runze Qi Nange Wang Yang Gao Jun Yu Chunling He Zhengxiang Shen Lun Shen Song Guo Zhenyong Hou Kaifan Ji Xingzi Bi Wei Duan Xiao Yang Jiaben lin Ziyao Hu Qian Song Zihao Yang Yajie Chen Weidong Qiao Wei Ge Fu li Lei Jin Jiawei He Xiaobo Chen Xiaocheng Zhu Junwang He Qi Shi liu liu Jinsong li Dongxiao Xu Rui liu Taijie li Zhenggong feng Yamin Wang Chengcheng Fan shuo liu Sifan Guo Zheng Sun Yuchuan Wu Haiyu li Qi Yang Yuyang Ye Weichen Gu Jiali Wu Zhe Zhang Yue Yu Zeyi Ye Pengfeng Sheng Yifan Wang Wenbin li Qiushi Huang Zhong Zhang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 101408China School of Earth and Space Sciences Peking UniversityBeijing 100871China Key Laboratory of Solar Activity and Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Tongji University Institute of Precision Optical EngineeringSchool of Physics Science and EngineeringKey Laboratory of Advanced Micro-Structured Materials MOEShanghaiChina Xi'an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi'an 710119China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201304China Yunnan Observatories Chinese Academy of SciencesKunming650011China

The Solar Upper Transition Region Imager(SUTRI)onboard the Space Advanced Technology demonstration satellite(SATech-01),which was launched to a Sun-synchronous orbit at a height of~500 km in 2022 July,aims to test the on-orbit performance of our newly developed Sc/Si multi-layer reflecting mirror and the 2k×2k EUV CMOS imaging camera and to take full-disk solar images at the Ne VII 46.5 nm spectral line with a filter width of~3 *** employs a Ritchey-Chrétien optical system with an aperture of 18 *** on-orbit observations show that SUTRI images have a field of view of~416×416 and a moderate spatial resolution of~8″without an image stabilization *** normal cadence of SUTRI images is 30 s and the solar observation time is about16 hr each day because the earth eclipse time accounts for about 1/3 of SATech-01's orbit ***15 GB data is acquired each day and made available online after *** images are valuable as the Ne VII 46.5 nm line is formed at a temperature regime of~0.5 MK in the solar atmosphere,which has rarely been sampled by existing solar *** observations will establish connections between structures in the lower solar atmosphere and corona,and advance our understanding of various types of solar activity such as flares,filament eruptions,coronal jets and coronal mass ejections.

关键词： Sun:transition region Sun:UV radiation Sun:activity space vehicles:instruments

在线全文

学校读者我要写书评

暂无评论

热轧过程卷取张力综合优化设定模型的开发

塑性工程学报 2017年第4期24卷 21-27页

作者：白振华李麒麟李柏阳刘硕杨徐记栓李小峰燕山大学国家冷轧板带装备及工艺工程技术研究中心亚稳材料制备技术与科学国家重点实验室河北秦皇岛066004

针对热轧钢卷卷取过程出现的松卷、层间滑移以及卷取后的鼓肚缺陷问题,从螺旋形开口圆筒模型着手,充分考虑到热轧卷取机组的设备与工艺特点,提出了一套"低张助卷高张卷取"新工艺技术,实现了对热轧钢卷的稳定有效卷取。随后,在分析了低... 详细信息

针对热轧钢卷卷取过程出现的松卷、层间滑移以及卷取后的鼓肚缺陷问题,从螺旋形开口圆筒模型着手,充分考虑到热轧卷取机组的设备与工艺特点,提出了一套"低张助卷高张卷取"新工艺技术,实现了对热轧钢卷的稳定有效卷取。随后,在分析了低张助卷高张卷取机理的基础上,给出各个阶段的临界卷取张力的计算模型。以松卷、层间滑移以及鼓肚缺陷的治理为目标,建立了一套热轧带钢卷取张力综合优化技术,最大程度上减少了热轧带钢生产过程中层间滑移、松卷以及鼓肚缺陷的发生概率,同时开发出了相应的软件,并将其应用到了某钢厂1350热轧生产线,取得了良好的使用效果,给企业创造了较大的经济效益。

关键词：热轧卷取松卷鼓肚张力优化设定模型开发