Hollow Mesoporous Fe2O3 Nanospindles/CNTs Composite: An Efficient Catalyst for High-Performance Li-O2 Batteries

Frontiers in Chemistry

Jianping He¹  Juanjuan Yan¹  Yiou Ma¹  Tao Wang¹  Hao Gong¹  Xiaoli Fan¹  Hairong Xue¹  Bin Gao¹  Xianguang Meng²  Songtao Zhang³ 

[1] Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China;Photofunctional Materials Research Platform, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan, China;Testing Center, Yangzhou University, Yangzhou, China;

关键词: hollow mesoporous structure;    carbon support;    transition metal oxides;    cathodic catalyst;    Li-O2 batteries;   

DOI  :  10.3389/fchem.2019.00511

来源: DOAJ

【 摘 要 】

The design of mesoporous or hollow transition metal oxide/carbon hybrid catalysts is very important for rechargeable Li-O2 batteries. Here, spindle-like Fe2O3 with hollow mesoporous structure on CNTs backbones (Fe2O3-HMNS@CNT) are prepared by a facile hydrolysis process combined with low temperature calcination. Within this hybrid structure, the hollow interior and mesoporous shell of the Fe2O3 nanospindles provide high specific surface area and abundant catalytical active sites, which is also beneficial to facilitating the electrolyte infiltration and oxygen diffusion. Furthermore, the crisscrossed CNTs form a three-dimensional (3D) conductive network to accelerate and stabilize the electron transport, which leads to the decreasing internal resistance of electrode. As a cathodic catalyst for Li-O2 batteries, the Fe2O3-HMNS@CNT composite exhibits high specific capacity and excellent cycling stability (more than 100 cycles).

【 授权许可】

Unknown