Li-oxygen (Li-O2) battery is considered the promising battery because of its theoretical specific energy among all known battery chemistries. In the past decade, efforts have focused on the air cathode. However, the all-important Li-metal anode is somewhat left aside, constituting one of the biggest barriers to the progress in the field of Li-O2 battery.
The parasitic reaction between the Li-metal anode and dissolved O2 in the electrolyte is one of the most important issues concerning about the Li-metal anode in Li-O2 battery. Therefore, efforts to suppress this parasitic reaction are recognized of great significance.
In a study published in Nano Letters, Prof. CHEN Liwei from Suzhou Institute of Nano-Tech and Nano-Bionics of the Chinese Academy of Sciences (CAS) and Prof. PENG Zhangquan from Changchun Institute of Applied Chemistry of CAS have reported that the parasitic reaction between the Li-metal anode and the electrolyte with dissolved O2 in Li-O2 battery can be significantly suppressed using an advanced Li-CNT composite material with tailor-designed surface passivated layer as an alternative to the Li-metal anode.
This achievement significantly enhanced the electrochemical reversibility and doubled the cycle life of the resultant Li-O2 cells, as compared with the benchmark of Li-O2 cells with a configuration of Li | 1.0 M LiTFSI TEGDME | KB.
Moreover, the researchers utilized a variety of advanced characterization tools to understand the working principles of the reaction interface of the Li-CNT | electrolyte solution, and revealed that an oxygen-tolerant and stable solid-electrolyte interphase (SEI) has been formed.
Apart from being used as a high-performance alternative anode of aprotic Li-O2 batteries, the Li-CNT composite can also be applied in other high energy density batteries such as all-solid-state and lithium-sulfur.
Advanced Lithium Metal–Carbon Nanotube Composite Anode for High-Performance Lithium–Oxygen Batteries
A team led by Professor Zhang Xin-Bo of the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences hypothesized that the key to unlocking lithium-oxygen batteries’ potential could be to create cathodes that are unreactive to the reduced oxygen species, but...
An international team, including members from the University of Science and Technology of China, recently published details in the journal Science about an engineered electrode material with a potential to be used in advanced batteries.
86-10-68597521 (day)
86-10-68597289 (night)
86-10-68511095 (day)
86-10-68512458 (night)
cas_en@cas.cn
52 Sanlihe Rd., Xicheng District,
Beijing, China (100864)
Copyright © 2002 - Chinese Academy of Sciences
