Ammonia-treatment assisted fully encapsulation of Fe_2O_3 nanoparticles in mesoporous carbons as sta

来源 :Journal of Energy Chemistry | 被引量 : 0次 | 上传用户:c126202
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
To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe2O3 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area (>1700 m 2 g-1 ) and large pore volume (>1.8 cm 3 g-1 ). Fine Fe2O3 nanoparticles with sizes in the range of 5 7 nm were highly and homogenously encapsulated into CMK-5 matrix through ammonia-treatment and subsequent pyrolysis method. The Fe2O3 loading was carefully tailored and designed to warrant a high Fe2O3 content and adequate buffer space for improving the electrochemical performance. In particular, such Fe2O3 and mesoporous carbon composite with 47 wt% loading exhibits a considerably stable cycle performance (683 mAh g-1 after 100 cycles, 99% capacity retention against that of the second cycle) as well as good rate capability. The fabrication strategy can effectively solve the drawback of single material, and achieve a high-performance lithium electrode material. To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe2O3 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area (> 1700 m 2 g-1) and large pore volume (> 1.8 cm 3 g -1). Fine Fe 2 O 3 nanoparticles with sizes in the range of 5 7 nm were highly and homogenously encapsulated into CMK-5 matrix through ammonia-treatment and subsequent pyrolysis method. The Fe 2 O 3 loading was carefully tailored and designed to warrant a High Fe2O3 content and adequate buffer space for improving the electrochemical performance. In particular, such Fe2O3 and mesoporous carbon composite with 47 wt% loading showed a stable stable cycle performance (683 mAh g-1 after 100 cycles, 99% capacity retention against that of the second cycle) as well as good rate capability. The fabrication strategy can effectively solve the drawback of single material, and achieve a high-performance lithium electrode mat erial.
其他文献
最近编辑采访了这家业主的厨房翻新案例,业主赵先生由于是半包翻新,所以自己也采购了不少材料,跑了很多卖场,自然有很多经验总结。见到小编向他询问心得,光是橱柜的选购就倒
本文从职业技能大赛概念出发,阐述了开展职业技能竞赛的意义,有助于提高教学质量、有助于学生实践能力的培养、有助于学生创新能力的培养,提出了开展计算机教学的原则,提出了
本文建立了三值光学计算机第一个除法例程的算法,设计了该例程的操作步骤.该算法根据三值光学计算机数据位众多、按位可分配、每一位的计算功能可随时配置、采用MSD并行加法
生态环境的保护成为我们共同面对的问题和竞相努力的目标。而水土流失就是生态环境保护过程中需要面对的最大的难题之一。本文研究的就是水土保持对生态环境建设的促进。 Th
The physical and electrical properties of a Ge/GeO_2/HfO_2/Al gate stack are investigated.A thin interfacial GeO_2 layer(~ 1 nm) is formed between Ge and HfO_2
目的观察前列地尔注射液治疗急性缺血性脑血管病的疗效。方法将60例患者随机分为治疗组(30例)和对照组(30例),用神经功能缺损评分和生活能力评定,分别于治疗前和治疗后7天、1
整体式智能升降防护操作平台,是我公司基于GA08-I附着式升降脚手架技术而研制的用于高层、超高层建筑外墙脚手架工程的高性能、高防护的成套机械设备。即沿建筑物外侧搭设不
“爸爸,您最喜欢的颜色是什么?”“红色”慈祥的父亲抚摸着女儿秀美的长发。啊!红色,吾之梦,苦涩的,铿锵的,有力的复现了整整一百四十多个春秋冬夏……在梦中,我仿佛听过,巴
合山市财政局今年对国库券认购工作抓得早、抓得紧。该局在深入基层,搞好宣传动员的基础上,把认购国库券的任务层层分解落实。并认真兑现去年的奖励政策,进一步调动了广大职
恙虫病是由恙虫病立克次体(Rickettsiatsutsugamushi)所引起的一种自然疫源性疾病,以鼠类等为储存宿主,经恙螨幼虫的叮咬而传播。本病与军队关系很大,当进入流行区未做好预