Carbon Nanotube-Encapsulated Noble Metal Nanoparticle Hybrid as a Cathode Material for Li-Oxygen Batteries
Xin Huang, Hong Yu, Huiteng Tan, Jixin Zhu, Wenyu Zhang, Chengyuan Wang, Jun Zhang, Yuxi Wang, Yunbo Lv, Zhi Zeng, Dayong Liu, Jun Ding, Qichun Zhang, Madhavi Srinivasan, Pulickel M. Ajayan, Huey Hoon Hng and Qingyu Yan
Article first published online: 22 AUG 2014 | DOI: 10.1002/adfm.201400921
Encapsulation of noble metal nanoparticles significantly strengthens the surface electron density of carbon nanotubes (CNTs) without causing regional enrichment of electron density on CNT surface. Accordingly, the entire surfaces of CNTs serve as catalytic regions for the oxygen reduction reaction (ORR), which ensures uniform covering of Li2O2 nanocrystals on the CNT surface, thus facilitating the decomposition of Li2O2 with low charge overpotential.