| AVS 58th Annual International Symposium and Exhibition | |
| Plasma Science and Technology Division | Wednesday Sessions |
| Session PS+SE-WeM |
| Session: | Atmospheric Plasma Processing and Micro Plasmas |
| Presenter: | Shih-min Chang, National Taiwan University, Taiwan, Republic of China |
| Authors: | S.M. Chang, National Taiwan University, Taiwan, Republic of China E.F. Rodriguez, National Taiwan University, Taiwan, Republic of China H.C. Li, National Taiwan University, Taiwan, Republic of China Y.J. Yang, National Taiwan University, Taiwan, Republic of China N.L. Wu, National Taiwan University, Taiwan, Republic of China C.C. Hsu, National Taiwan University, Taiwan, Republic of China |
| Correspondent: | Click to Email |
Nanocrystalline spinel Li4Ti5O12 (LTO) is a promising anode material for Li-ion batteries due to its zero-strain during intercalation/deintercalation and the 1.5 V (vs. Li+/Li) potential plateau. Development of a process that allows for rapid synthesis with controllable microstructure has been challenging. In this work, LTO nanocrystalline particles synthesized by an atmospheric pressure plasma jet (APPJ) will be presented. The APPJ is sustained using a repetitive pulsed power source with N2 gas. Ti and Li ions-containing solution of specific formula is used as the precursor solution. The precursor is ultrasonically nebulized and is then carried into the downstream of the APPJ using a carrier gas. With this process, nanocrystalline LTO can be fabricated in one step with a short contact time (a few ms) between the precursor and the plasma jet without an additional annealing process. The LTO particle size can be effectively controlled using the precursor solution concentration and the carrier gas flow rate. 100-300 nm dense spherical particles can be fabricated under an optimized condition. The microstructure and porosity of the particles is strongly influenced by the pre-heat process for the nebulized precursor droplets prior to entering the jet downstream. Dense spherical and porous particles are fabricated under conditions with and without preheating, respectively. Finally, full battery performance test will be presented and key factors that dominate the fabricated nanoparticle characteristics will be discussed.