检索结果-南通市图书馆

Modification of NASICON Electrolyte and Its Application in Real Na-Ion Cells

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

Engineering 2022年第1期8卷 170-180页

作者： qiangqiang Zhang Quan Zhou Yaxiang Lu Yuanjun Shao yuruo qi Xingguo qi Guiming Zhong Yong Yang Liquan Chen Yong-Sheng Hu Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Xiamen Institute of Rare-Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021China State Key Laboratory of Physical Chemistry of Solid Surfaces&Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China HiNa Battery Technology Co. Ltd.Liyang 213300China Yangtze River Delta Physics Research Center Co. Ltd.Liyang 213300China

The low ionic conductivity of solid-state electrolytes(SSEs)and the inferior interfacial reliability between SSEs and solid-state electrodes are two urgent challenges hindering the application of solid-state sodium batteries(SSSBs).Herein,sodium(Na)super ionic conductor(NASICON)-type SSEs with a nominal composition of Na_(3+2x)Zr_(2-x)MgxSi_(2)PO_(12) were synthesized using a facile two-step solid-state method,among which Na_(3.3)Zr_(1.85)Mg_(0.15)Si_(2)PO_(12)(x=0.15,NZSP-Mg_(0.15))showed the highest ionic conductivity of 3.54mS∙cm^(-1) at 25℃.By means of a thorough investigation,it was verified that the composition of the grain boundary plays a crucial role in determining the total ionic conductivity of NASICON.Furthermore,due to a lack of examination in the literature regarding whether NASICON can provide enough anodic electrochemical stability to enable high-voltage SSSBs,we first adopted a high-voltage Na_(3)(VOPO_(4))2F(NVOPF)cathode to verify its compatibility with the optimized NZSP-Mg_(0.15) SSE.By comparing the electrochemical performance of cells with different configurations(low-voltage cathode vs high-voltage cathode,liquid electrolytes vs SSEs),along with an X-ray photoelectron spectroscopy evaluation of the after-cycled NZSP-Mg_(0.15),it was demonstrated that the NASICON SSEs are not stable enough under high voltage,suggesting the importance of investigating the interface between the NASICON SSEs and high-voltage cathodes.Furthermore,by coating NZSP-Mg_(0.15) NASICON powder onto a polyethylene(PE)separator(PE@NASICON),a 2.42 A∙h non-aqueous Na-ion cell of carbon|PE@NASICON|NaNi_(2/9)Cu_(1/9)Fe_(1/3)Mn_(1/3)O_(2) was found to deliver an excellent cycling performance with an 88%capacity retention after 2000 cycles,thereby demonstrating the high reliability of SSEs with NASICON-coated separator.

关键词： Solid-state electrolytes Solid-state sodium batteries NASICON Interface Separator Coating

Efficient Catalytic Conversion of Polysulfides by Biomimetic Design of “Branch‑Leaf” Electrode for High‑Energy Sodium–Sulfur Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第3期13卷 155-167页

作者： Wenyan Du Kangqi Shen yuruo qi Wei Gao Mengli Tao Guangyuan Du Shu‑juan Bao Mingyang Chen Yuming Chen Maowen Xu Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationSchool of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Beijing Computational Science Research Center Beijing 100193People’s Republic of China Center for Green Innovation School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350007People’s Republic of China

Rechargeable room temperature sodium–sulfur(RT Na–S)batteries are seriously limited by low sulfur utilization and sluggish electrochemical reaction activity of polysulfide intermediates.Herein,a 3D“branch-leaf”biomimetic design proposed for high performance Na–S batteries,where the leaves constructed from Co nanoparticles on carbon nanofibers(CNF)are fully to expose the active sites of Co.The CNF network acts as conductive“branches”to ensure adequate electron and electrolyte supply for the Co leaves.As an effective electrocatalytic battery system,the 3D“branch-leaf”conductive network with abundant active sites and voids can effectively trap polysulfides and provide plentiful electron/ions pathways for electrochemical reaction.DFT calculation reveals that the Co nanoparticles can induce the formation of a unique Co–S–Na molecular layer on the Co surface,which can enable a fast reduction reaction of the polysulfides.Therefore,the prepared“branch-leaf”CNF-L@Co/S electrode exhibits a high initial specific capacity of 1201 mAh g^−1 at 0.1 C and superior rate performance.

关键词： Co nanoparticles Sodium-sulfur batteries Branch-leaf,biomimetic

Advanced Na metal anodes

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第6期27卷 1584-1596页

作者： Chenglong Zhao Yaxiang Lu Jinming Yue Du Pan yuruo qi Yong-Sheng Hu Liquan Chen Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190 China

Na metal anode, benefiting from its high theoretical capacity and lowest electrochemical potential, ~sone of the most favorable candidates for future Na-based batteries with high energy density. Dendritegrowth, volume change and high reactivity are the formidable challenges in terms of good cycling perfor-mance and high Coulombic efficiency as well as an expected safety guarantee of Na metal anode for thepractical application. Solid electrolyte interphase （SEI） layer as an indispensable component of a battery,its formation and stability play the critical role in the feasibility of Na metal anode. In this review, wefirst discuss the current consideration and challenges of Na metal anode, and then summarize severalstrategies to suppress dendrite growth and improve electrochemical performance, including interface en-gineering, electrolyte composition, electrode construction, and so on. Finally, the conclusion and futureperspective of potential development on Na metal anode are proposed.

关键词： Na metal anode Solid electrolyte interphase Electrolyte Dendrite Na-metal batteries

Simulation design of fuze warhead system of air defense missile at very low altitude

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2017年第3期28卷 572-584页

作者： qi Zhao Guangyu Du Bin Zhang Yanbin Zhai yuruo Shi Beijing Institute of Electronic System Engineering Beijing 100854China

A novel simulation method for fuze warhead system (FWS) at very low altitude flight is proposed to solve adaptability issues of the traditional one in the naval battle. Firstly, a simulation system framework is presented. Then the detailed implementation of a novel general fuze model, a novel sea echo model and a novel warhead dynamic effectiveness power field algorithm including the simulation system are presented. Finally, simulation results show good performance of the proposed method. The proposed method can simulate the echo signal when the complex fuze antennas detect target and the sea at the same time, and can truly reflect the target positions hit by the warhead fragments. The proposed method can solve the existing problems in the FWS simulation system.

关键词： fuze warhead system (FWS) simulation fuze warhead matching sea echo fragment trajectory drifting

SHRIMP zircon U-Pb dating of the Gangou granitoids,Central Tianshan Mountains,Northwest China and tectonic significances

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2007年第11期52卷 1507-1516页

作者： SHI yuruo LIU DunYi ZHANG qi JIAN Ping ZHANG Fuqin MIAO LaiCheng Beijing SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Two types of granitoids,highly deformed augen granitoids and undeformed fine-grained granitoids,are widely distributed in Gangou area,Central Tianshan Mountains,Northwest China. The augen granitoids are high-K calc-alkaline characterized by high K2O,Rb,Y and Th,and low Sr and Sr/Y. They also have high contents of large ion lithophile elements (LILE),such as Ba,Rb,K and Th,and relatively low con-tents of high field strength elements (HFSE),such as Zr,Y and Nb. The fine-grained granitoids are calc-alkaline characterized by high Sr,low Y and HREE,similar to adakitic rocks,and with Na2O/K2O<2 (1.76―1.91),high ISr (0.70689―0.70981),and negative εNd(t ) (-2.4―-5.3). High-precision SHRIMP U-Pb zircon dating results indicate that the Gangou augen granitiods were formed at 428 ± 10 Ma,and the fine-grained granitoids were emplaced at 361―368 Ma. These geochemical and U-Pb zircon data have significant implications for the timing of closure of the Mishigou-Gangou Ocean and the evolution of the Central Tianshan orogenic belt.

关键词：测定年龄小虾地域天山

在线全文

学校读者我要写书评

暂无评论

超声波辅助提取黑木耳黄酮的工艺研究

山东化工 2019年第17期48卷 8-10页

作者：郑佳东周培培戚玉若官若楚栾璐璐付丽娜黄河科技学院医学院

以黑木耳为原料,研究超声波辅助提取黑木耳黄酮的最佳工艺条件。以黄酮提取率为考察指标,利用NaNO2-Al(NO3)3显色法并设计单因素试验和正交试验探索料液比、超声温度、超声功率及乙醇浓度四个因素对黑木耳黄酮提取率的影响。结果显示超... 详细信息

以黑木耳为原料,研究超声波辅助提取黑木耳黄酮的最佳工艺条件。以黄酮提取率为考察指标,利用NaNO2-Al(NO3)3显色法并设计单因素试验和正交试验探索料液比、超声温度、超声功率及乙醇浓度四个因素对黑木耳黄酮提取率的影响。结果显示超声波辅助提取黑木耳黄酮的最佳工艺条件为:料液比1∶6(g/mL)、超声温度70℃、超声功率70W、乙醇浓度75%,提取率为0.92%,RSD=1.081%。表明此最佳工艺条件稳定、结果可靠。

关键词：超声波提取黑木耳黄酮工艺

165例纤维肌痛综合征患者中医证候分布及特点

在线全文

学校读者我要写书评

暂无评论

北京中医药大学学报 2022年第6期45卷 630-636页

作者：李阳孙雨若付静思李延婷焦娟中国中医科学院广安门医院风湿病科北京100053

目的调查纤维肌痛综合征(FMS)中医证候分布情况及不同证候患者的人口学特点和病情轻重程度。方法采用横断面调查研究方法,将中医证候分为寒湿痹阻证、肝郁气滞证、气滞血瘀证、肝胆湿热证、肝血亏虚证、肝肾不足证及复合证候(同时具有以... 详细信息

目的调查纤维肌痛综合征(FMS)中医证候分布情况及不同证候患者的人口学特点和病情轻重程度。方法采用横断面调查研究方法,将中医证候分为寒湿痹阻证、肝郁气滞证、气滞血瘀证、肝胆湿热证、肝血亏虚证、肝肾不足证及复合证候(同时具有以上2种证候),制定“纤维肌痛综合征中医证候调查问卷”。根据患者的应答进行数据分析,得到FMS中医证候分布情况,比较不同证候的人口学特点,并采用《视觉模拟评分法》《修订版纤维肌痛影响问卷》《匹兹堡睡眠质量指数》《多维疲劳量表》《贝克忧郁量表》《压力知觉量表》对患者病情进行评估。结果共165例患者参与调查。单一证候97例,分别为肝肾不足证27例(16.4%)、肝郁气滞证25例(15.2%)、气滞血瘀证17例(10.3%)、肝胆湿热证14例(8.5%)、寒湿痹阻证7例(4.2%)和肝血亏虚证7例(4.2%),复合证候中肝郁气滞合肝血亏虚证最多,为34例(20.6%),其他复合证候共34例(20.6%)。不同证候患者在性别、年龄、吸烟、教育程度、收入方面存在差异,肝血亏虚证患者病程较长,肝郁气滞证患者抑郁程度较高,寒湿痹阻证患者总体病情较轻。结论在FMS证候分布以实证及虚实夹杂证为主,少数为虚证。邪实主要见于气滞、血瘀、寒湿,正虚主要见于血虚、阴虚,阳虚者较少,病变脏腑主要在肝。FMS证候可能与人口学特点和病情程度有关。

关键词：纤维肌痛综合征中医证候人口学横断面调查临床研究肝郁气滞证肝血亏虚证

内蒙古苏左旗白音宝力道Adakite质岩类成因探讨及其SHRIMP年代学研究

在线全文

学校读者我要写书评

暂无评论

岩石学报 2005年第1期21卷 143-150页

作者：石玉若刘敦一张旗简平张福勤苗来成施光海张履桥陶华中国地质科学院地质研究所北京离子探针中心北京100037 中国科学院地质与地球物理研究所所北京100029 内蒙古地质研究所呼和浩特010020 中国地质科学院矿产资源研究所北京100037

内蒙古苏左旗白音宝力道闪长质岩类的地球化学特征类似典型的埃达克岩,其SiO3含量≥56%(61.1-61.6%),Al2O3含量均大于15%(16.6-17.1%),MgO3%,Na2O/K2O比值较高(1.8-2.7,平均2.2),亏损HREE,Yb含量400μg/g)、贫Y(14.5-16.2μg/g,40(40-42),在微量元素蛛网图上具明显的Sr正异常。表明其成因与板块的俯冲作用有关,可能是消减的MORB板片部分熔融的产物。精确的SHRIMP皓石U-Pb年龄测定显示,内蒙古苏左旗白音宝力道英云闪长岩的结晶年龄为464±8Ma和479+8Ma,结合前人的SHRIMP定年资料,该闪长质岩体的年龄范围可能在464-490Ma之间。表明内蒙古中部的板块俯冲事件发生在早奥陶世。

关键词：苏左旗埃达克质岩石 SHRIMP 早奥陶世

在线全文

学校读者我要写书评

暂无评论

造山橄榄岩及其意义

地质通报 2020年第10期39卷 1489-1506页

作者：张旗张维姜丽莉石玉若焦守涛王存智王振中国科学院地质与地球物理研究所北京100029 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 中国地质科学院地质研究所离子探针中心北京100037 中国地质调查局成都地质调查中心四川成都610081 中国地质调查局发展研究中心北京100037 自然资源部地质信息工程技术创新中心北京100037 中国地质调查局南京地质调查中心江苏南京210016 中国地质大学(北京)地球科学与资源学院北京100083

造山橄榄岩和蛇绿岩的橄榄岩主要由地幔岩组成,造山橄榄岩代表陆壳下的地幔,蛇绿岩的橄榄岩代表洋壳下的地幔。洋壳下的地幔与陆壳下的地幔在物质组成上大体接近,但产出的构造背景明显不同。介绍了造山橄榄岩的组成、与造山橄榄岩有关... 详细信息

造山橄榄岩和蛇绿岩的橄榄岩主要由地幔岩组成,造山橄榄岩代表陆壳下的地幔,蛇绿岩的橄榄岩代表洋壳下的地幔。洋壳下的地幔与陆壳下的地幔在物质组成上大体接近,但产出的构造背景明显不同。介绍了造山橄榄岩的组成、与造山橄榄岩有关的高压-超高压变质作用、地幔流体作用、成矿作用、造山橄榄岩侵位的机制等,以及中国几个可能的造山橄榄岩的基本情况,讨论了造山橄榄岩的演变过程及其与蛇绿岩的橄榄岩的区别。造山橄榄岩的形成大体经历了初期的陆壳减薄和裂谷阶段、晚期的挤压造山2个构造演化阶段。有些地区只发育裂谷阶段,构造演化在裂谷后即夭折了,也称为造山橄榄岩。蛇绿岩与造山橄榄岩之间的区别不在物质组成和地球化学方面,而是在构造背景上。如有没有深海沉积、混杂堆积,有,是蛇绿岩;没有,则是造山橄榄岩。有没有超高压变质作用、地幔交代作用或地幔交代作用是否强烈,有且很强,可能是造山橄榄岩;没有,则可能是蛇绿岩。岩体是冷侵位还是热侵位,冷侵位是蛇绿岩,热侵位是造山橄榄岩。蛇绿岩出现在造山带,代表已经消失的洋盆;造山橄榄岩一般也出现在造山带,但代表的是减薄和撕裂的陆壳下的地幔。

关键词：造山橄榄岩蛇绿岩阿尔卑斯裂谷超高压变质作用流体洋壳陆壳