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|Title:||Linker-free 3D assembly of nanocrystals with tunable unit size for reversible lithium ion storage||Authors:||Deng, D.
|Issue Date:||2-Sep-2011||Citation:||Deng, D., Lee, J.Y. (2011-09-02). Linker-free 3D assembly of nanocrystals with tunable unit size for reversible lithium ion storage. Nanotechnology 22 (35) : -. ScholarBank@NUS Repository. https://doi.org/10.1088/0957-4484/22/35/355401||Abstract:||A simple and scalable procedure combining hydrothermal synthesis with post-synthesis calcination was developed to produce a linker-free, thermally stable, mesoscale 3D ordered assembly of spinel-type ZnCo 2O 4 nanocrystals. The mesoscale assembly with distinctively sharp edges was formed by close-packing the ZnCo 2O 4 nanocrystal building blocks with a unit size changeable by the synthesis temperature. A self-templating mechanism based on the topotactic transformation of an oxalato-bridged precursor coordination compound was proposed for the assembly. The packaging of crystalline ZnCo 2O 4 nanoparticles, an active lithium ion storage compound, into a dense organized structure is an effective way to increase the volumetric capacity of ZnCo 2O 4 nanoparticles for reversible lithium ion storage. The highly ordered 3D assembly of ZnCo 2O 4 demonstrated excellent reversible lithium ion storage properties and a specific capacity (∼800mAhg -1) much higher than that of carbon (typically ∼ 350mAhg -1). © 2011 IOP Publishing Ltd.||Source Title:||Nanotechnology||URI:||http://scholarbank.nus.edu.sg/handle/10635/89333||ISSN:||09574484||DOI:||10.1088/0957-4484/22/35/355401|
|Appears in Collections:||Staff Publications|
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