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Design of LiAlO2 mosaic structure for preparing high nickel-based LiNi0.88Co0.07Al0.05O2 cathode material by simple hydrolysis method by J. LUO; J.X. Liu; F.M. Xiao; L. Huang; W.C. Li; R.H. Tang; Q. Zhou; Y. Wang is a Engineering article available to read on EtoBox.

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In order to restrain the capacity decay of nickel-rich materials for lithium-ion batteries (LIBs) in advanced energy applications, a Ni-rich cathode (LiNi0.88Co0.07Al0.05O2, LANCA) with high-rate capability and cycle life was designed and prepared by coating γ-LiAlO2 and doping Al3+ on the surface and inside of the secondary particles, respectively. Specifically, the γ-LiAlO2-coated and Al3+-doped LANCA samples were synthesized by a simple strategy of pre-coating Ni0.88Co0.07Al0.05(OH)2, based on aluminum isopropoxide hydrolysis combined with a post-sintering lithiation process. With the γ-LiAlO2 and Al3+, the capacity retention ratio of the cathode is tremendously improved from 61.7 to 83.6% at 1 C rate after 100 cycles. Even at a heavy current density of 10 C for the LANCA cathode, a high reversible capacity of 154.4 mA h g − 1 can be acquired, which amount to the 82.5% capacity retention at 0.2 C. Detailed morphology and structure observation shows that the side reaction at the electrolyte-cathode interface was suppressed, the structural degradation and intergranular cracking were suppressed, while the diffusion of Li+ and conductivity were improved. Therefore, this ingenious st

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Author

J. LUO; J.X. Liu; F.M. Xiao; L. Huang; W.C. Li; R.H. Tang; Q. Zhou; Y. Wang

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)