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Fabrication of High‐Energy Li‐Ion Cells with Li 4 Ti 5 O 12 Microspheres as Anode and 0.5 Li 2 MnO 3 ⋅0.5 LiNi 0.4 Co 0.2 Mn 0.4 O 2 Microspheres as Cathode
Author(s) -
Dai Chenguang,
Ye Jing,
Zhao Shiyong,
He Ping,
Zhou Haoshen
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201501417
Subject(s) - faraday efficiency , materials science , microsphere , anode , fabrication , cathode , chemical engineering , nanoparticle , nanotechnology , particle (ecology) , particle size , spray drying , analytical chemistry (journal) , electrode , chromatography , chemistry , medicine , alternative medicine , oceanography , pathology , geology , engineering
In this work, we propose an effective way to prepare nanosized Li 4 Ti 5 O 12 (LTO) microspheres and 0.5 Li 2 MnO 3 ⋅0.5 LiNi 0.4 Co 0.2 Mn 0.4 O 2 (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 Li 4 Ti 5 O 12 /0.5 Li 2 MnO 3 ⋅0.5 LiNi 0.4 Co 0.2 Mn 0.4 O 2 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.