【摘 要】
：
The low specific capacity and sluggish electrochemical reaction kinetics greatly block the development of sodium-ion batteries(SIBs).New high-performance electr
【机 构】
：
Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Engineering Research Center
论文部分内容阅读
The low specific capacity and sluggish electrochemical reaction kinetics greatly block the development of sodium-ion batteries(SIBs).New high-performance electrode materials will enhance development and are urgently required for SIBs.Herein,we report the preparation of supersaturated bridge-sulfur and vanadium co-doped MoS2 nanosheet arrays on carbon cloth(denoted as V-MoS2+x/CC).The bridge-sulfur in MoS2 has been created as a new active site for greater Na+storage.The vanadium doping increases the density of carriers and facilitates accelerated electron transfer.The synergistic dual-doping effects endow the V-MoS2+x/CC anodes with high sodium storage performance.The optimized V-MoS2.49/CC gives superhigh capacities of 370 and 214 mAh·g-1 at 0.1 and 10 A·g-1 within 0.4-3.0 V,respectively.After cycling 3,000 times at 2 A·g-1,almost 83％of the reversible capacity is maintained.The findings indicate that the electrochemical performances of metal sulfides can be further improved by edge-engineering and lattice-doping co-modification concept.
其他文献
Metal-organic framework(MOF)nanosheets and covalent organic framework(COF)nanosheets as emerging porous materials nanosheets have captured increasing attention
随着移动“互联网+”时代的到来,信息技术和科技理念不断涌现,传统教学方式面临着巨大的挑战,同时也迎来了全新的机遇.当代大学生被称为“互联网的原住民”,他们是伴随着信息技术的高速发展成长起来的一代.教育工作者只有利用互联网,用学生们喜欢的语言、交互方式及思维方法进行交流及引导,才能更好地融入到学生集体中.组织学与胚胎学为医学基础必修课程,在传统的教学中以教师为中心,以班级授课为基本形式,即学生集中在教室里听教师讲课,强调的是学生机械性被动的学习和死记硬背.在互联网背景下,组织学与胚胎学课程设计了三段式任务驱
Biologically,there exist two kinds of syntheses:photosynthesis and ATP-driven biosynthesis.The light harvesting of photosynthesis is known to achieve an efficie
在科尔沁榆树疏林草原分布典型区域的北部,设置固定样地,采用记名计数样方法,逐月调查,研究其草本层的物种组成和多样性.结果表明,科尔沁榆树疏林草原草本层种类组成中禾本科植物为第一大科,其次是豆科、藜科和菊科,猪毛蒿大量分布,草地出现了普遍退化;草本层的Margalef丰富度指数范围在1.37~2.16、Shannon-wiener多样性指数和Simpson多样性指数范围在0.49~1.41,Pielou均匀度指数范围在0.39~0.49,4种指数具有相似的季节动态规律,9月最高,10月迅速下降.
“一带一路”倡议实施以来,我国与沿线国家的投资往来越来越频繁,在频繁的投资往来中,首先要考虑到的便是沿线国家的投资风险问题,因此投资争端解决机制的构建有其必要性和现实重要性。对于投资争端解决机制的构建可以依据现有的双多边或者区域协定的基础上,构建司法、调解、仲裁等多元化的争端解决机制,同时充分认识到现有的争端机制的诸多弊端,加强多方合作,协商,争取构建新的争端解决机构,构建与“一带一路”发展战略相吻合的公约体系。确保“一带一路”倡议得以顺利实施,惠及沿线各国。
Neutral aqueous rechargeable Co3O4//Zn batteries with high-output voltage and outstanding cycling stability have yielded new insights into wearable energy-stora
随着现阶段经济日益变化时代的来临,国家对教育的重视也越来越高,教育理念也在逐渐更新.在初中教学中,道德与法治教育是培养学生综合能力的表现方式之一,在时代背景的影响下,
黄庭坚是北宋的诗书大家,其论书诗反映了他在进行诗歌创作时对于书法的认识和看法,集诗学思想和书学思想于一身,这在宋代大家中别具一格。文章基于前人研究,对黄庭坚论书诗中法古与创新的艺术手法作更深入地阐释以突出黄庭坚书学思想的别具一格。文章主要从黄庭坚的概况、黄庭坚论书诗分析以及黄庭坚论书诗中的书学思想特征这三个方面展开论述,以期更好地理解黄庭坚论书诗中的韵味,总结并创新当前关于黄庭坚论书诗法古与创新的相关研究。
Due to the unique fluorescence characteristics,superstructures from self-assembly of semiconductor nanoparticles have become essential components of material an
对模糊映射的LgH-方向可微性问题进行了研究,给出了模糊映射的LgH-方向可微的概念及性质,同时讨论了模糊映射的LgH-方向可微性与gH-方向可微性之间的关系,得到了LgH-方向可微的几个必要条件,并证明了模糊映射的LgH-导数和LgH-偏导数均为沿特殊方向的LgH-方向导数.