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Issue 33, 2018
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Intramolecular deformation of zeotype-borogermanate toward a three-dimensional porous germanium anode for high-rate lithium storage

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Abstract

We demonstrate a new class of synthetic process for three-dimensional porous Ge materials (3D-pGe). Starting from zeotype-borogermanate microcubes, the 3D-pGe sample was synthesized through a thermal deformation of artificial Ge-rich zeolite, etching, and subsequent hydrogen reduction. After the synthesis, the resultant byproducts were simply removed by warm water instead of a harmful etchant such as hydrofluoric acid. Benefiting from the structural advantages with meso/macro porosity in the overall framework, the as-prepared 3D-pGe exhibits good electrochemical properties as anode materials for lithium-ion batteries with a high capacity (770 mA h g−1), cycling stability (capacity retention over 83%) after 250 cycles at 1C, and excellent rate capability (32% for 10C with respect to C/5) as well as pseudocapacitive contribution by surface-controlled reaction. This study paves the way to a new synthesis strategy of 3D porous Ge anode materials from zeolite for large-scale energy storage applications.

Graphical abstract: Intramolecular deformation of zeotype-borogermanate toward a three-dimensional porous germanium anode for high-rate lithium storage

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Publication details

The article was received on 18 May 2018, accepted on 14 Jun 2018 and first published on 15 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA04626C
Citation: J. Mater. Chem. A, 2018,6, 15961-15967
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    Intramolecular deformation of zeotype-borogermanate toward a three-dimensional porous germanium anode for high-rate lithium storage

    T. Yoon, G. Song, Ahmad M. Harzandi, M. Ha, S. Choi, S. Shadman, J. Ryu, T. Bok, S. Park and K. S. Kim, J. Mater. Chem. A, 2018, 6, 15961
    DOI: 10.1039/C8TA04626C

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