Rational architecture design of yolk/double-shells Si-based anode material with double buffering car

来源 :绿色能源与环境(英文版) | 被引量 : 0次 | 上传用户:JavaProDev
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Among the many strategies to fabricate the silicon/carbon composite,yolk/double-shells structure can be regarded as an effective strategy to overcome the intrinsic defects of Si-based anode materials for Li-ion batteries (LIBs).Hereon,a facile and inexpensive technology to prepare silicon/carbon composite with yolk/double-shells structure is proposed,in which the double buffering carbon shells are fabricated.The silicon/carbon nanoparticles with core-shell structure are encapsulated by SiO2 and external carbon layer,and it shows the yolk/double-shells structure via etching the SiO2 sacrificial layer.The multiply shells structure not only significantly improves the electrical conductivity of composite,but also effectively prevents the exposure of Si particles from the electrolyte composition.Meanwhile,the yolk/double-shells structure can provide enough space to accommodate the volume change of the electrode during charge/discharge process and avoid the pulverization of Si particles.Moreover,the as-prepared YDS-Si/C shows excellent performance as anode of LIBs,the reversible capacity is as high as 1066 mA h g-1 at the current density of 0.5 A g-1 after 200 cycles.At the same time,the YDS-Si/C has high capacity retention and good cyclic stability.Therefore,the unique architecture design of yolk/double-shells for Si/C composite provides an instructive exploration for the development of next gen-eration anode materials of LIBs with high electrochemical performances and structural stability.
其他文献
Rational design of ionic liquids (ILs),which is highly dependent on the accuracy of the model used,has always been crucial for CO2 separation from flue gas.In t
随着现如今我国社会经济的不断发展,严格要求建筑行业根据自身的发展状态,对不同阶段发生的问题进行提取,并予以相关的方案进行改进,以此显著提高建筑工程的质量水平.其中,建
随着我国经济水平的快速发展,人们对居住环境的要求也与日俱增,新农村建设、学校基础设施建设逐渐增多,而由此造成的各种建筑质量通病也在后期使用过程中频繁出现,其中以墙体
现代建筑中的室内装饰往往需要花费更多的时间对色彩搭配进行科学的研究,装饰的设计在一定程度上具有艺术性.在内饰上更加注重多种颜色的搭配,实现各种装饰颜色的不同结合,使
Utilization of carbon dioxide (CO2) is of great significance in the development of CO2 absorption and the solution of greenhouse gas effect.Highly efficient con
Developing a highly active and durable non-noble metal catalyst for aqueous-phase levulinic acid (LA) hydrogenation to γ-valerolactone(GVL) is an appealing yet
随着国家对土木工程的关注,对施工质量的要求有了新的标准,尤其是建筑施工质量更需要施工单位引起重视.比如研究边坡支护技术,以提高建筑基坑的可靠性和稳定性,结合土木工程
近年来,经济快速发展,社会不断进步,暖通空调系统是现代建筑的重要组成部分之一,在发展过程中,绿色建筑在全世界的发展越来越有优势,绿色建筑不但提高了建筑的舒适度,而且有
中国传统文化是中华民族伟大智慧的结晶,在上下五千年发展的历史长河中,华夏文明在各个时期和阶段留下了灿烂的文化瑰宝,中国传统文化是作为现代化社会主义经济建设强国发展
SMA改性沥青混凝土属于热拌沥青混合料,与其他沥青材料相比,其高温稳定性、低温抗裂性以及耐疲劳性能好,且骨架密实度较高,是目前工程领域中应用较为广泛的沥青混凝土施工材