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Issue 6, 2014
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Ultrafast high-capacity NiZn battery with NiAlCo-layered double hydroxide

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Abstract

High-performance, low-cost, safe and environmentally friendly batteries are important for portable electronics and electric vehicles. Here, we synthesized NiAlCo-layered double hydroxide (LDH) nanoplates attached to few-walled carbon nanotubes (NiAlCo LDH/CNT) as the cathode material of a rechargeable NiZn battery in aqueous alkaline electrolytes. The α-phase nickel hydroxide with ultrathin morphology and strong coupling to nanotubes afforded a cathode with a high capacity of ∼354 mA h g−1 and ∼278 mA h g−1 at current densities of 6.7 A g−1 and 66.7 A g−1, respectively. Al and Co co-doping is unique for stabilizing α-phase nickel hydroxide with only a small capacity loss of ∼6% over 2000 charge and discharge cycles at 66.7 A g−1. Rechargeable ultrafast NiZn batteries with NiAlCo LDH/CNT cathode and a zinc anode can deliver a cell voltage of ∼1.75 V, energy density of ∼274 W h kg−1 and power density of ∼16 kW kg−1 (based on active materials) with a charging time of <1 minute. The results open the possibility of ultrafast and safe batteries with high energy density.

Graphical abstract: Ultrafast high-capacity NiZn battery with NiAlCo-layered double hydroxide

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Publication details

The article was received on 26 Jan 2014, accepted on 21 Mar 2014 and first published on 21 Mar 2014


Article type: Paper
DOI: 10.1039/C4EE00317A
Citation: Energy Environ. Sci., 2014,7, 2025-2032
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    Ultrafast high-capacity NiZn battery with NiAlCo-layered double hydroxide

    M. Gong, Y. Li, H. Zhang, B. Zhang, W. Zhou, J. Feng, H. Wang, Y. Liang, Z. Fan, J. Liu and H. Dai, Energy Environ. Sci., 2014, 7, 2025
    DOI: 10.1039/C4EE00317A

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