Abstract
In this study, we develop a simple template-free strategy to fabricate uniform porous CuCo2O4 hollow spheres. The shells of the as-synthesized CuCo2O4 hierarchical hollow nanostructures are composed of primary nanoparticle units, leading to a superior specific surface area of 51 m2 g−1. When applied in lithium ion batteries, the porous CuCo2O4 hollow spheres show excellent lithium storage performance, which could deliver a high specific capacity of 930 mAh g−1 after 150 cycles for half-cell and 660 mAh g−1 after 50 cycles for full cell. The good electrochemical properties of the as-synthesized porous CuCo2O4 hollow spheres can be attributed to their unique porous structure, which is beneficial for shorting lithium ion-electron transmission path and alleviating the structural strain of volume change.
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Acknowledgments
This work was supported by the financial supports of the National Natural Science Foundation of China (No. 51672213), Natural Science Basic Research Plan in Shaanxi Province of China (No.2016JM2027), and Xi’an industrial technology innovation project-technology transfer promoting program (No. CXY1438-7).
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Figure S1
XRD pattern of the as-prepared SS-CuCo2O4. (DOC 284 kb)
Figure S2
SEM (a) and TEM (b) images of the PHS-CuCo2O4 precursor. (DOC 1618 kb)
Figure S3
SEM (a,b) and TEM (c,d) images of the as-synthesized SS-CuCo2O4. (DOC 3296 kb)
Figure S4
SEM (a) and TEM (b) images of PHS-CuCo2O4 electrode after 150 cycles at the current density of 0.1 A g−1. (DOC 1836 kb)
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Cai, S., Wang, G., Jiang, M. et al. Template-free fabrication of porous CuCo2O4 hollow spheres and their application in lithium ion batteries. J Solid State Electrochem 21, 1129–1136 (2017). https://doi.org/10.1007/s10008-016-3414-1
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DOI: https://doi.org/10.1007/s10008-016-3414-1