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Shape-controlled synthesis of hierarchically layered lithium transition-metal oxide cathode materials by shear exfoliation in continuous stirred-tank reactors

Abstract

To develop hierarchical layered cathode materials with high performance is key to further improve advanced lithium-ion batteries, but these systems are challenging to synthesize with controllable shape in large scale. We used a high-shear mixer to continuously prepare flower-like hydroxide precursors via a co-precipitation method in a continuous stirred-tank reactor (CSTR). After the lithiation reaction, hierarchical lithium transition-metal oxides with predominantly exposed {010} electrochemically active planes are produced. The electrochemical properties of these peculiar materials (i.e. LiNi1/3Co1/3Mn1/3O2, LiNi0.6Co0.2Mn0.2O2 and Li1.2Ni0.2Mn0.6O2) are demonstrated to be excellent. Particularly, LiNi1/3Co1/3Mn1/3O2 exhibits a durable high-rate capability with capacity retention of 98.2 % after 500 cycles at 20 C between 2.7 and 4.3 V. This work opens a new technology to fabricate two-dimensional nanoarchitectured electrode materials. Moreover, the outstanding electrochemical properties of this hierarchical cathode material in combination with the scalable method make it highly interesting for commercialization.

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Publication details

The article was received on 13 Sep 2017, accepted on 11 Nov 2017 and first published on 13 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA08073E
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Shape-controlled synthesis of hierarchically layered lithium transition-metal oxide cathode materials by shear exfoliation in continuous stirred-tank reactors

    W. Hua, Z. Wu, M. Chen, M. Knapp, X. Guo, S. Indris, J. R. Binder, N. Bramnik, B. Zhong, H. Guo, S. Chou, Y. Kang and H. Ehrenberg, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA08073E

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