Kim, Jung Sub Kim, A-Young Byeon, Young Woon Ahn, Jae Pyoung Byun, Dongjin Lee, Joong Kee 2024-01-20T04:33:43Z 2024-01-20T04:33:43Z 2021-09-05 2016-03-20 0013-4686 https://pubs.kist.re.kr/handle/201004/124281 Germanium-based multimetallic-oxide materials have attracted significant attention as high-capacity anodes for next generation lithium-ion batteries (LIBs). However, they suffer from poor cyclic stability due to extreme volume expansion and reduced electrical conductivity after repeated cycles. To circumvent these issues, we propose that Ge-based multimetallic-oxide nanowires can be synthesized with electrically conductive carbon to significantly enhance the cyclic stability of the Ge-based anodes. We prepare conformal-carbon-coated Zn2GeO4 nanowires (NWs) using a microwave-induced hydrothermal method with subsequent thermal decomposition. The obtained carbon-coated Zn2GeO4-NW anode exhibits a discharge capacity of 485 mAh/g and a Coulombic efficiency (CE) of 98.4% after 900 cycles at 0.6 C. Furthermore, these anodes exhibit outstanding rate-capability characteristics, even with an increased C-rate of 17.7 C. This excellent electrochemical performance can be ascribed to the improved electron and ion transport provided and the structurally reinforced conductive layer comprising a conformal carbon layer. Therefore, it is expected that our approach can also be applied to other multimetallic-oxide materials, resulting in large, reversible capacities; excellent cyclic stabilities; and good rate capabilities for high-performance LIBs. (C) 2016 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ELECTROCHEMICAL LITHIATION GE PERFORMANCE CAPACITY SILICON NANOCOMPOSITES ELECTRODES Porous Zn2GeO4 nanowires with uniform carbon-buffer layer for lithium-ion battery anodes with long cycle life Article 10.1016/j.electacta.2016.02.118 1 ELECTROCHIMICA ACTA, v.195, pp.43 - 50 ELECTROCHIMICA ACTA 195 43 50 scie scopus 000372524300006 2-s2.0-84959364789 Electrochemistry Electrochemistry Article ELECTROCHEMICAL LITHIATION GE PERFORMANCE CAPACITY SILICON NANOCOMPOSITES ELECTRODES Zn2GeO4 nanowires carbon-buffer layers long cycle life lithium-ion batteries