期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 49, 页码 33712-33722出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b12319
关键词
graphene mesh; Li-ion batteries; pore structure; N doping; general strategy
资金
- National Key Basic Research Program of China (973 Program) [2015CB932200]
- National Natural Science Funds for Excellent Young Scholars [61622402]
- National Natural Science Foundation of China [61376088, 51302134, 61136003, 51173081, 21502091]
- Natural Science Foundation of Jiangsu Province [BK20130934, BK20130912, BM2012010]
- Natural Science Foundation of Jiangsu Higher Education Institutions [13KJB510012, 14KJB430017]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [YX03001]
- Ministry of Education of China [IRT1148]
- Six Talent Plan [2015XCL015]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- MOE [MOE2012-T2-2-049, RG100/15, RG178/15]
A general and mild strategy for fabricating defect-enriched graphene mesh (GM) and its application toward the anode of Li-ion batteries (LIBs) has been reported. The GM with a pore size of 60-200 nm is achieved by employing Fe2O3 as the etching reagent that is capable of locally etching the graphene basal plane in a relatively mild manner. Upon different drying technologies, that is, oven drying and freeze-drying, GMs with different porous structure are obtained. The electrochemical Li storage properties of GMs in comparison with graphene aerogels (GAs) disclose that both defect sites and porous structure are crucial for the final anodic performances. We show that only when merged with rich porosity, the GM anode can achieve a better Li storage performance than that of GA. Moreover, we further fabricated nitrogen-doped GM (NGM) using urea as the nitrogen source with a freeze-drying process. Benefiting from the unique structural characteristics, that is, plentiful defects, abundant pores, and nitrogen doping, the NGM anode exhibits high Li storage capacity with good cyclic stability (1078 mAh g(-1) even after 350 continuous cycles at a current density of 0.2 C) and outstanding rate capability. Our finding provides fundamental insights into the influence of defects and pore structure on the Li storage properties of graphene, which might be helpful for designing advanced graphene-based anodes for LIBs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据