题名: Scalable synthesis of nanometric alpha-Fe2O3 within interconnected carbon shells from pyrolytic alginate chelates for lithium storage
作者: Qiu, Jun1; Li, Mingjie2; Zhao, Yun3; Kong, Qingshan2; Li, Xianguo1; Li, Chaoxu2
刊名: RSC ADVANCES
出版日期: 2016
卷号: 6, 期号:10, 页码:7961-7969
英文摘要: Nanostructured alpha-Fe2O3 with a carbon coating has advantages over commercially available graphitic anodes in lithium ion batteries, including high theoretical anodic capacity (1007 mA h g(-1)), low cost and environmental safety. However, parts of its merits were cancelled out by the current route used for its synthesis. For example, most of its synthesis pathways are tedious, costly, on small scale and environmentally unfriendly. By combining two naturally abundant materials (iron ions and sodium alginate) into conventional wet-spinning and pyrolysis processes, we show that alpha-Fe2O3 could be nanostructured and carbon-coated using a facile and yet scalable technique. The successful synthesis of nanostructured alpha-Fe2O3 within interconnected carbon shells strongly depends on the chelation of iron ions and alginate into "egg-box" networks and an optimized pyrolysis step. Due to an extraordinary combination of nanometric scale, improved electrical conductivity and spatial confinement of the carbon coating, the resultant materials exhibit a high lithium storage capacity (e.g. up to similar to 1400 mA h g(-1) at a current of 50 mA g(-1) in the initial cycle) and great stability (e.g. similar to 560 mA h g(-1) after 600 cycles at 200 mA g(-1)) as well as a coulombic efficiency of 97.5%. Owing to the cost-efficient, environmentally friendly and scalable production, this synthesis may pave a highly promising way to the macroscopic preparation of alpha-Fe2O3/carbon hybrid materials as anodes in lithium ion batteries.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
关键词[WOS]: LI-ION BATTERIES ; HIGH-PERFORMANCE ANODE ; HIGH-CAPACITY ANODE ; ONE-POT SYNTHESIS ; FACILE SYNTHESIS ; SODIUM ALGINATE ; ELECTROCHEMICAL PERFORMANCE ; THERMAL-DEGRADATION ; FE3O4 NANOSPHERES ; GRAPHENE OXIDE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000369515700034
Citation statistics:
内容类型: 期刊论文
URI标识: [http://ir.qibebt.ac.cn/handle/337004/7965]  
Appears in Collections:青岛生物能源与过程研究所_仿生智能材料团队


作者单位: 1.Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266101, Peoples R China
2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China
3.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266101, Peoples R China
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