Twin-functional graphene oxide: compacting with Fe₂O₃ into a high volumetric capacity anode for lithium ion battery

详细信息    查看全文

• 作者：Zhengjie Li^a ; ^b ; ^c ; ¹ ; Debin Kong^a ; ^c ; ¹ ; Guangmin Zhou^d ; Sida Wu^b ; Wei Lv^b ; ^{lv.wei@sz.tsinghua.edu.cn} ; Chong Luo^b ; Jiao-Jing Shao^e ; Baohua Li^b ; Feiyu Kang^b ; Quan-Hong Yang^a ; ^b ; ^c ; ^{yang.quanhong@sz.tsinghua.edu.cn} ; ^{qhyangcn@tju.edu.cn}
• 关键词：Graphene oxide ; Template ; High volumetric capacity ; Li-ion battery
• 刊名：Energy Storage Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：6
• 期：Complete
• 页码：98-103
• 全文大小：1292 K
• 卷排序：6

文摘

Graphene oxide (GO) shows very unique twin functions, both as hard and soft templates, in the production of highly solid Fe2O3 microspheres. The microsphere is a very dense aggregation of nanosized primary particles and represents an important advance in energy storage materials with high volumetric performance. GO as a hard template is responsible for the precursor nucleation in the formation of the primary nanoparticles (NPs), and meanwhile, as a soft template, manages the densification of these NPs to form a secondary solid and compact microsphere. Together with three-dimensional interconnected conductive graphene network formed spontaneously, the highly solid Fe2O3 microspheres exhibit an excellent rate performance and more importantly, a super high volumetric capacity of about 1200 mA h cm−3. This work shows a promising approach for the densification of nanostructures and promotes the practical applications of low density nanomaterials in real energy storage devices.