Dendritic micro-nano NiCo 2 O 4 anode material generated from chemical dealloying for high-performance lithium-ion batte
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ORIGINAL PAPER
Dendritic micro-nano NiCo2O4 anode material generated from chemical dealloying for high-performance lithium-ion batteries Man Zhang 1,2 & Dongwei Li 1 & Lijie Yang 3 & Huan Shi 1 & Yuxia Liu 2 Received: 19 April 2020 / Revised: 29 July 2020 / Accepted: 30 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract CoNi-contained nanosheets can be prepared by dealloying CoNiAl alloys in aqueous NaOH solution in the presence of H2O2, and upon annealing sample exhibits dendritic NiCo2O4 micro-nanostructure. The effect of H2O2 solution on the structure, morphology, and electrochemical performances of the resulting products is studied systematically. These results indicate that the H2O2 solution mainly influences the morphology of the NiCo2O4. When tested as anode materials for lithium-ion batteries (LIBs), the obtained NiCo2O4 sample shows high specific capacity, excellent rate property, and superb cycling stability. A reversible capacity is still maintained at 1016.9 mAh/g after 100 cycles at a current density of 100 mA/g. Even at a current rate of 1000 mA/g, the capacity can reach to 691.4 mAh/g. The outstanding electrochemical properties of the NiCo2O4 anode make them promising anode materials of LIBs and other energy storage applications. Keywords Dealloying . Lithium-ion battery . Anode materials . Dendritic structure . NiCo2O4
Introduction Lithium-ion batteries (LIBs) as one of the most promising rechargeable energy storage devices are widely applied in electric vehicles (EVs) and hybrid electric vehicles (HEVs) [1–3]. The anode material often plays an important role in the determination of the energy density, safety, and cycling life of LIBs. Graphite has been widely used as the
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11581-020-03726-y) contains supplementary material, which is available to authorized users. * Dongwei Li [email protected] * Yuxia Liu [email protected] 1
Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
2
The Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
3
College of Basic Medicine, Jining Medical University, Jining 272067, China
commercialized anode due to its excellent cycling stability and relatively small volume change of only 12% during lithiation/delithiation [4, 5]. However, this material offers low theoretical capacity (LiC 6 , 372 mAh/g) and low delithiation potential (0.05 V vs. Li+/Li) [6, 7]. Obviously, it is an unsuitable anode material for the next-generation LIBs required for smart electrical grid systems and wearable electronic devices. It is required to construct novel anode materials of higher Li-storage capability and operational safety than graphite. The primary candidates are transition metal oxides (TMOs) due to special lithium oxidation reducti
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