title: Fabrication of High-Energy Li-Ion Cells with Li4 Ti5 O12 Microspheres as Anode and 0.5 Li2 MnO3 ⋅0.5 LiNi0.4 Co0.2 Mn0.4 O2 Microspheres as Cathode.
abstract: In this work, we propose an effective way to prepare nanosized Li4 Ti5 O12 (LTO) microspheres and 0.5 Li2 MnO3 ⋅0.5 LiNi0.4 Co0.2 Mn0.4 O2 (NCM) microspheres by similar spray-drying methods. Both obtained materials are accumulated by primary nanoparticles and show a spherical morphology with particle distribution of 10-20 μm. The LTO microspheres deliver a tap density of 1.04 g cm(-3) , while the tap density of NCM microspheres is 2.07 g cm(-3) , which means an enhanced volumetric energy density. The as-prepared LTO microspheres have a reversible capacity of 170 mA h g(-1) at 0.1 C and a capacity retention of 97 % after 250 cycles at 1 C. The NCM microspheres have an initial discharge capacity of 270 mA h g(-1) with a corresponding Coulombic efficiency of 88 % at 0.03 C. Both materials show a relatively good rate capability. The Li4 Ti5 O12 /0.5 Li2 MnO3 ⋅0.5 LiNi0.4 Co0.2 Mn0.4 O2 cells deliver a high cathode specific capacity of 273 mA h g(-1) and good initial Coulombic efficiency of 88 % at 0.03 C, and can be developed for powering hybrid and plug-in hybrid vehicles.
authors.affiliation: Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures and, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Chenguang
authors.initials: C
authors.lastname: Dai
authors.affiliation: Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures and, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Ye
authors.affiliation: Zhangjiagang Guotai-Huarong New Chemical Materials Co. Ltd, Zhangjiagang, 215634, P. R. China.
authors.forename: Shiyong
authors.initials: S
authors.lastname: Zhao
authors.affiliation: Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures and, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, P. R. China. pinghe@nju.edu.cn.
authors.forename: Ping
authors.initials: P
authors.lastname: He
authors.affiliation: Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures and, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, 210093, P. R. China. hszhou@nju.edu.cn, hs.zhou@aist.go.jp.|National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan. hszhou@nju.edu.cn, hs.zhou@aist.go.jp.
authors.forename: Haoshen
authors.initials: H
authors.lastname: Zhou
keywords: full cells; high tap density; lithium-ion batteries; microspheres; spray drying method