Mesoporous ZnMn2O4 Microtubules Derived from a Biomorphic Strategy for High-Performance Lithium/Sodium Ion Batteries

ZnMn2O4 microtubules (ZMO-MTs) with a mesoporous structure are fabricated by a novel yet effective biomorphic approach employing cotton fiber as a biotemplate. The fabricated ZMO-MT has approximately an inner diameter of 8.5 μm and wall thickness of 1.5 μm. Further, the sample of ZMO-MT displays a l...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2018-10, Vol.10 (39), p.33170-33178
Main Authors: Luo, Xiangwei, Zhang, Xiuyun, Chen, Lin, Li, Lin, Zhu, Guisheng, Chen, Guangcun, Yan, Dongliang, Xu, Huarui, Yu, Aibing
Format: Article
Language:English
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Summary:ZnMn2O4 microtubules (ZMO-MTs) with a mesoporous structure are fabricated by a novel yet effective biomorphic approach employing cotton fiber as a biotemplate. The fabricated ZMO-MT has approximately an inner diameter of 8.5 μm and wall thickness of 1.5 μm. Further, the sample of ZMO-MT displays a large specific surface area of 48.5 m2 g–1. When evaluated as a negative material for Li-ion batteries, ZMO-MT demonstrates an improved cyclic performance with discharge capacities of 750.4 and 535.2 mA h g–1 after 300 cycles, under current densities of 200 and 500 mA g–1, respectively. Meanwhile, ZMO-MT exhibits superior rate performances with high reversible discharge capacities of 614.7 and 465.2 mA h g–1 under high rates of 1000 and 2000 mA g–1, respectively. In sodium ion batteries applications, ZMO-MT delivers excellent high discharge capacities of 102 and 71.4 mA h g–1 after 300 cycles under 100 and 200 mA g–1, respectively. An excellent rate capability of 58.2 mA h g–1 under the current density of 2000 mA g–1 can also be achieved. The promising cycling performance and rate capability could be benefited from the unique one-dimensional mesoporous microtubular architecture of ZMO-MT, which offers a large electrolyte/electrode accessible contact area and short diffusion distance for both of ions and electrons, buffering the volume variation originated from the repeated ion intercalation/deintercalation processes.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.8b10111