Researchers at Fudan University with colleagues at the Shanghai Academy of Spaceflight have developed a LiMn2O4 material for a Li-ion battery cathode that exhibits superfast charging capabilities. Their paper is published in the ACS journal Nano Letters.
It is known that from the nature there are a lot of materials rich in facets. Each different facet has different numbers of atoms and effects. According to these natural findings, recently nanomaterials with tailored crystal orientation or facet for electrode materials of solar cells and lithium ion batteries were reported by controlling the preparation conditions such as additives and surroundings, and their performance has greatly improved.
According to the above findings, in this Letter we designed a LiMn2O4 nanotube with exposed (400) planes by using carbon nanotubes (CNTs) as a sacrificed template. It shows that the second-level charge performance and even the amount of conductive agent is in the range for normal practical application. Its charge capacity can be 59.3 mAh/g (54% of the capacity) at the charge rate of 600C (6 s) as a cathode material for aqueous rechargeable lithium batteries (ARLBs) in 0.5 M Li2SO4 aqueous solution.—Tang et al.
The material also presents excellent cycling behavior due to the porous tube structure to buffer the strain and stress.
|Credit: ACS, Tang et al. Click to enlarge.|
Wei Tang, Yuyang Hou, Faxing Wang, Lili Liu, Yuping Wu, and Kai Zhu (2013) LiMn2O4 Nanotube as Cathode Material of Second-Level Charge Capability for Aqueous Rechargeable Batteries. Nano Letters doi: 10.1021/nl400199r