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Issue 48, 2017
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Shape-controlled synthesis of hierarchically layered lithium transition-metal oxide cathode materials by shear exfoliation in continuous stirred-tank reactors

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Abstract

Developing hierarchically layered cathode materials with high performance is key to further improving advanced lithium-ion batteries, but it is challenging to synthesize such systems with controllable shape on a 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 electrochemically active {010} 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 a capacity retention of 98.2% after 500 cycles at 20C between 2.7 and 4.3 V. This work provides a new technology to fabricate two-dimensional nanoarchitectured electrode materials. Moreover, the outstanding electrochemical properties of this hierarchically structured cathode material in combination with the scalable method make it highly interesting for commercialization.

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

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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, 2017,5, 25391-25400
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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, Natalia N. Bramnik, B. Zhong, H. Guo, S. Chou, Y. Kang and H. Ehrenberg, J. Mater. Chem. A, 2017, 5, 25391
    DOI: 10.1039/C7TA08073E

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