New NASICON type oxyanion high capacity anode, Li2Co2(MoO4)3, for lithium-ion batteries: preliminary studies |
| |
Authors: | M S Michael K M Begam Michael Cloke S R S Prabaharan |
| |
Institution: | 1. Department of Chemistry, SSN College of Engineering, SSN Nagar, Kalavakkam, Chennai, India 2. Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Tronoh, Malaysia 3. Faculty of Engineering, The Nottingham University, Malaysia Campus, Semenyih, Malaysia
|
| |
Abstract: | We describe in this paper the lithium insertion/extraction behavior of a new NASICON type Li2Co2(MoO4)3 at a low potential and explored the possibility of considering this new oxyanion material as anode for lithium-ion batteries for the first time. Li2Co2(MoO4)3 was synthesized by a soft-combustion glycine-nitrate low temperature protocol. Test cells were assembled using composite Li2Co2(MoO4)3 as the negative electrode material and a thin lithium foil as the positive electrode material separated by a microporous polypropylene (Celgard® membrane) soaked in aprotic organic electrolyte (1 M LiPF6 in EC/DMC). Electrochemical discharge down to 0.001 V from OCV (~3.5 V) revealed that about 35 Li+ could possibly be inserted into Li2Co2(MoO4)3 during the first discharge (reduction) corresponding to a specific capacity amounting to 1,500 mAh g?1. This is roughly fourfold higher compared to that of frequently used graphite electrodes. However, about 24 Li+ could be extracted during the first charge. It is interesting to note that the same amount of Li+ could be inserted during the second Li+ insertion process (second cycle discharge) giving rise to a second discharge capacity of 1,070 mAh g?1. It was also observed that a major portion of lithium intake occurs below 1.0 V vs Li/Li+, which is typical of anodes being used in lithium-ion batteries. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|