【摘 要】
：
In the recent times sodium ion batteries (SIBs) have come to the forefront as an economic and resourceful alternative to lithium-ion batteries (LIBs) for powering portable electronic devices and large-scale grid storage.As the specific capacity,energy den
【机 构】
：
Institute for Sustainable Energy & College of Sciences,Shanghai University,Shanghai 200444,China
论文部分内容阅读
In the recent times sodium ion batteries (SIBs) have come to the forefront as an economic and resourceful alternative to lithium-ion batteries (LIBs) for powering portable electronic devices and large-scale grid storage.As the specific capacity,energy density and long cycle life of batteries depend upon the performance of anode materials;their quest is the ultimate need of the hour.Among the anode materials,the semimetallic pnictogens (As,Sb,Bi) and their compounds offer high gravimetric/volumetric capacities,but suffer from undesired volume expansion and inferior electrical conductivity.Herein,this paper reviews the recent progress in semimetallic pnictogens as alloying anodes and their compounds mainly as conversion-alloying anodes.Various debatable sodiation mechanisms(intercalation or alloying) have been presented with emphasis on in situ/ex situ advanced characterization methods well supported by theoretical modeling and calculations.The reviewed electrochemical reaction mechanisms,coherent structural designs and engineering provide a vital understanding of the electrochemical processes of Na+ ion storage.The existing challenges and perspectives are also presented,and several research directions are proposed from the aspects of special morphological design,employing conductive substrates,electrolyte additives and reducing particle size for technical and commercial success of SIBs.
其他文献
人才是第一资源,是一座城市的核心资源、战略资源,人才的竞争力决定了城市的综合竞争力.上海市长宁区通过规划牵动、政策推动、平台驱动、项目带动、服务策动等方式,在科技创新人才集聚建设方面取得了一定成效,为长宁区加快建设具有世界影响力的国际精品城区提供了重要的人才保障和智力支撑.在系统梳理“十三五”期间长宁区科创人才集聚现状的基础上,深入剖析区人才发展的问题,对“十四五”期间长宁科创人才集聚和发展提出对策建议.
“饭菜简单但味道很香;河水清澈得可以看见水里的鱼、虾、蟹等游来游去,淘米洗菜时用淘箩或竹篮就能抓到,伸手可及好像永远都抓不完;河水甘甜,口渴时捧起来就可以喝个饱.村容村貌虽然陈旧,但干净整洁.村民们连家前屋后和路上散落的畜禽粪都会搜集起来用于种菜.蓝天、碧水、净土,那是我儿时家乡的样子.”张家宏回忆道.
随着科技发展的日新月异,各种电子化设备也在不断地更新迭代,而显示技术及显示器件在信息技术发展过程中更是占据了十分重要的地位.我们几乎每天都会通过电视机、手机、笔记本电脑、平板电脑等各类电子设备的显示屏获取信息、与外界联通,它们已经成为现代日常生活和工作中不可或缺的一部分.
一、经济情报对于制定国家先进技术战略具有重要作用rn首先,美国需要优质经济数据,以了解在关键技术和产业领域相对于其他国家的竞争位势,包括关键优势和劣势,这样才能制定更有效的具体政策来刺激竞争力、增长和机会.
一、欧盟两用物项出口管制规则修订的背景rn《两用物项规则》是欧盟出口管制的重要法律依据,涵盖了欧盟两用物项出口、转让、过境、代理和技术援助的出口管制制度.欧盟成员国可在此基础上,结合本国安全等需要,制定、实施更加严苛的两用物项出口管制措施.
美国国际战略研究中心于2021年3月29日发布《2030年全球网络:发展中经济体和新兴技术》报告.报告指出,未来十年,发展中经济体巨大的通信基础设施需求与通信技术市场,将决定中美两国由谁主导全球通信网络.美国要利用开放式无线接入网、智慧城市、光子网络、低轨卫星和高空平台等新兴通信技术,抢占全球通信网络优势地位.报告建议,美国应加紧制定2030年全球互联互通愿景,发展具有前景的通信技术,开拓发展中经济体市场,重视多领域协同发展.
自普京第四次就任俄罗斯总统以来,推动科教融合是其关键执政目标之一.经过近一年的酝酿与部署,2021年6月,俄罗斯高等教育与科学部(以下简称教科部)宣布正式启动《2021—2030学术领导力战略计划》(简称“2030优先计划”),这是俄罗斯迄今为止最大规模的高等教育发展计划,旨在集中优势资源,打造一批先进的现代化大学,综合提升其同步开展教育和科研的能力,为实现俄罗斯到2030年的国家发展目标作出贡献.根据普京第四任期的发展规划,俄罗斯到2030年的国家发展目标主要包括:使俄罗斯成功跻身全球五大经济体;实现国
Green synthesis has grabbed appreciable attention to eliminate the negative effects associated with various chemical processes.Due to the unparalleled electrical,mechanical,thermal and excellent physical properties,graphene,as the thinnest two-dimensional
Tomonaga-Luttinger liquid (TLL),a peculiar one-dimensional (1D) electronic behavior due to strong correlation,was first studied in 1D nanostructures and has attracted significant attention over the last several decades.With the rise of new two-dimensional
Organic spin valve (OSV),one of the most promising and representative devices involving spin injection,transport and detection,has drawn tremendous attention owing to their ultra-long spin relaxation time in the field of molecular spintronics.Since the fi