排序方式: 共有14条查询结果,搜索用时 15 毫秒
1.
Mesoporous Hollow Sb/ZnS@C Core–Shell Heterostructures as Anodes for High‐Performance Sodium‐Ion Batteries 下载免费PDF全文
Shihua Dong Caixia Li Zhaoqiang Li Luyuan Zhang Longwei Yin 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(16)
Combining the advantage of metal, metal sulfide, and carbon, mesoporous hollow core–shell Sb/ZnS@C hybrid heterostructures composed of Sb/ZnS inner core and carbon outer shell are rationally designed based on a robust template of ZnS nanosphere, as anodes for high‐performance sodium‐ion batteries (SIBs). A partial cation exchange reaction based on the solubility difference between Sb2S3 and ZnS can transform mesoporous ZnS to Sb2S3/ZnS heterostructure. To get a stable structure, a thin contiguous resorcinol‐formaldehyde (RF) layer is introduced on the surface of Sb2S3/ZnS heterostructure. The effectively protective carbon layer from RF can be designed as the reducing agent to convert Sb2S3 to metallic Sb to obtain core–shell Sb/ZnS@C hybrid heterostructures. Simultaneously, the carbon outer shell is beneficial to the charge transfer kinetics, and can maintain the structure stability during the repeated sodiation/desodiation process. Owing to its unique stable architecture and synergistic effects between the components, the core–shell porous Sb/ZnS@C hybrid heterostructure SIB anode shows a high reversible capacity, good rate capability, and excellent cycling stability by turning the optimized voltage range. This novel strategy to prepare carbon‐layer‐protected metal/metal sulfide core–shell heterostructure can be further extended to design other novel nanostructured systems for high‐performance energy storage devices. 相似文献
2.
赖守亮 《湖南工业大学学报》2006,20(5)
在我们的民族、民间艺术的拯救行动中,存在几个很严重的误区和悖论,不走出误区和摒弃悖论,不仅会浪费大量的人力、物力和财力,还很不利于我们的民族、民间艺术的保护和拯救。在增强民族、民间艺术自身的“造血功能”的同时,全民族要端正认识,拯救技艺,薪火相传。 相似文献
3.
在我们的民族、民间艺术的拯救行动中,存在几个很严重的误区和悖论,不走出误区和摒弃悖论,不仅会浪费大量的人力、物力和财力,还很不利于我们的民族、民间艺术的保护和拯救。在增强民族、民间艺术自身的“造血功能”的同时,全民族要端正认识,拯救技艺,薪火相传。 相似文献
4.
"If psychology is to live up to the purview of its very definition, then it must be that science whose problems lie closest to those of the humanities; indeed it must be that area in which the problems of the sciences, as traditionally conceived, and the humanities intersect… . It is clear that psychology needs many individuals having sensitivities overlapping with those of the humanist." Psychology must take the lead in exploring the relations between science and the humanities. From Psyc Abstracts 36:04:4AK29K. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
5.
我国外汇储备高速增长。截至到2005年9月末,国家外汇储备余额为7690亿美元,同比增长49.5%。按照目前的发展速度,仅仅我国大陆的外汇储备在明年就会超过日本,位居世界第一。另外,从几项常用的指标(外汇储备/进口比例、外汇储备机会收益、外汇储备/债务比例)来衡量,以及与其他国家外汇储备的比较来看,我国的外汇储备总额偏高,一篮子货币中的美元比例也偏高,而实物资产的储备偏少:同时外汇储备用于海外投资的结构也比较单一,潜藏着巨大的风险。应该根据我国的战略发展目标,逐步调整外汇储备结构和投资结构,更好地发挥我国外汇储备对国民经济的支撑和保证作用。 相似文献
6.
李继武 《安徽电气工程职业技术学院学报》2005,10(4):17-23
社区党建和社区文化从哲学视角看,具有辩证矛盾性,呈现为对立统一关系。其对立或差异表现为:社区党建和社区文化两者在内涵、目的、功能和地位上是有明显区别的;其统一表现在:社区党建和社区文化两者都以“三个代表”为指南,以科学发展观为基础,“以人为本”为立足点,并在相互依存中为社区建设服务。 相似文献
7.
Si-Yuan Pan Si-Hua Gao Rui-Chao Lin Shu-Feng Zhou Hong-Guan Dong Min-Ke Tang 《Critical reviews in food science and nutrition》2015,55(13):1836-1859
Despite the advances in science and technology and wide use of chemical drugs, dietary intervention (or food therapy) remains useful in preventing or treating many human diseases. A huge body of evidence shows that the dietary pattern or habit is also an important contributing factor to the development of chronic diseases such as hypertension, type 2 diabetes, hyperlipidemia, and cancers. In recent years, over-the-counter health foods, nutraceuticals, and plant-derived medicinal products have been gaining popularity all over the world, particularly in developed countries. Unfortunately, owing to the contamination with various harmful substances in foods and the presence of toxic food components, food-borne diseases have also become increasingly problematic. Incidents of food poisonings or tainted food have been increasing worldwide, particularly in China and other developing countries. Therefore, the government should put in a greater effort in enforcing food safety by improving the surveillance mechanism and exerting highest standards of quality control for foods. 相似文献
8.
纪剑梅 《徐州工程学院学报》2002,(3)
马克思主义哲学的基本原理和方法对班主任工作有重要的指导作用 ,班主任工作中蕴含着丰富的哲学道理。我们一定要把马克思主义普遍真理同班级工作具体实践紧密结合起来 ,深刻地把握班级管理工作中的内在本质的联系 ,科学地分析学生的实际 ,做好班主任工作 相似文献
9.
我国第三方物流产生与发展的哲学思考 总被引:1,自引:0,他引:1
林慧丹 《上海第二工业大学学报》2004,21(2):94-99
讨论了第三方物流的概念和特点,用对立统一的哲学发展观分析了第三方物流产生的历史必然性,用认识和实践相统一的哲学关系分析了第三方物流发展的规律与特点.在对第三方物流产生和发展哲学分析的基础上,探讨了我国发展第三方物流时应注意的几个问题,为我国第三方物流的研究和实践提供科学的指导和帮助. 相似文献
10.
崔世法 《安徽水利水电职业技术学院学报》2009,9(3):10-12
定远县是全国重要粮食生产基地,水资源供需矛盾突出,制约了全县经济社会发展,针对当前水资源供需的实际状况,提出定远县水资源可持续利用对策。 相似文献