铜包覆多孔硅基材料p-Si@Cu(x)的制备与性能

doi:10.7503/cjcu20160765

CORC > 北京大学 > 工学院

	铜包覆多孔硅基材料p-Si@Cu(x)的制备与性能; Preparation and Properties of Nanoscale p-Si@Cu(x)
	于志辉 ; 刘丹丹 ; 寇艳娜 ; 夏定国
刊名	高等学校化学学报
	2017
关键词	锂离子电池多孔硅基材料铜包覆 Lithium-ion battery Porous silicon material Copper cladding LITHIUM-ION BATTERIES ANODE MATERIAL HIGH-CAPACITY SHELL COMPOSITE SI SILICON CORE REDUCTION PARTICLES PROGRESS
DOI	10.7503/cjcu20160765
英文摘要	在球形SiO_2颗粒表面包覆适量的CuO,经还原得到铜包覆的多孔硅复合材料[p-Si@Cu(x)].利用X射线衍射、扫描电子显微镜、透射电子显微镜和比表面积分析等手段对样品的组成、物相结构、微观形貌和孔结构进行分析,并初步研究了材料的循环性能和倍率性能.结果表明,铜包覆量x=0.05时,在100 mA/g电流密度下,样品的首次放电容量为3596.9 mA·h/g,首次充电容量为2590.7 mA·h/g,首次库仑效率为72.03%;在1C倍率下可逆容量为1004.9 mA·h/g,0.1C倍率下循环100周后的可逆容量仍为1706.5mA·h/g,容量保持率为76.1%.; Nanoscale p-Si@Cu(x)(x stands for the cladding amount of copper) was prepared by St ber method and magnesiothermic reduction method. The morphologies and structures of p-Si@Cu(x) alloy were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM)?transmission electron microscopy(TEM) and specific surface area analysis, and the cyclic performance and rate performace of the material were investigated. The results show that the first discharge and charge capacity of p-Si@Cu(0.05) are 3596.9 and 2590.7 mAh/g, respectively at 100 mA/g and the first coulomb efficiency is 72.03%; its cell cycle stability and rate performance of p-Si@Cu(0.05) are also the best, the reversible capacity is 1004.9 mA5h/g at 1C. The reversible capacity is 1706.5 mA5h/g at 0.1C after 100 times cycling and the capacity remaining rate is 76.1%.; National High-Tech Research and Development Program of China [2012AA052201]; General Program of Science and Technology Development Project of Beijing Municipal Education Commission of China [KM201210005008]; Scientific Research Key Program of Beijing Municipal Commission of Education, China [KZ201310005001]; SCI(E); 中国科学引文数据库(CSCD); 05; 837-845; 38
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/462366]
专题	工学院
推荐引用方式 GB/T 7714	于志辉,刘丹丹,寇艳娜,等. 铜包覆多孔硅基材料p-Si@Cu(x)的制备与性能, Preparation and Properties of Nanoscale p-Si@Cu(x)[J]. 高等学校化学学报,2017.
APA	于志辉,刘丹丹,寇艳娜,&夏定国.(2017).铜包覆多孔硅基材料p-Si@Cu(x)的制备与性能.高等学校化学学报.
MLA	于志辉,et al."铜包覆多孔硅基材料p-Si@Cu(x)的制备与性能".高等学校化学学报 (2017).