A high-performance Zn battery based on self-assembled nanostructured NiCo2O4 electrode

Shang, Wenxu; Yu, Wentao; Tan, Peng; Chen, Bin; Xu, Haoran; Ni, Meng

doi:10.1016/j.jpowsour.2019.02.097

Cited by 88 publications

(53 citation statements)

References 45 publications

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“…Among the bifunctional metal oxides, the spinel-type NiCo 2 O 4 , in particular, has attracted much interest due to its fairly low over-potential and corrosion resistivity [5,6]. Several effective methods have been adopted to modify the electrochemical activity of NiCo 2 O 4 , and they are briefly classified as following: (1) Morphology engineering.…”

Section: Introductionmentioning

confidence: 99%

Flower-like NiCo2O4–CN as efficient bifunctional electrocatalyst for Zn-Air battery

Zhou

Cheng

et al. 2020

Electrochimica Acta

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Bifunctional transition metal oxide based electrocatalysts play an important role in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) for rechargeable metal-air batteries. Herein, we synthesize a kind of three-dimensional (3D) flower-like composite catalyst with NiCo 2 O 4 and N doped carbon (NC) derived from g-C 3 N 4 , under hydrothermal conditions. The best NiCo 2 O 4-CN catalyst shows a hierarchical structure composed of interconnected nanosheets, and exhibits versatile bifunctional ORR/OER electroactivities with a half-wave potential of 0.81 V for ORR and an overpotential of 383 mV for OER under a current density of 10 mA cm −2. The zinc-air battery with the NiCo 2 O 4-CN cathode demonstrates superior peak power density (149.6mW cm-2), excellent capacity performance up to 738.7 mAh g-1 and considerable durability, showing the feasibility of NiCo 2 O 4-CN in electrochemical energy devices.

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Section: Introductionmentioning

confidence: 99%

Flower-like NiCo2O4–CN as efficient bifunctional electrocatalyst for Zn-Air battery

Zhou

Cheng

et al. 2020

Electrochimica Acta

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“…Apparently, the G‐NCGs//Zn battery exhibits better cycling stability than that of NCGs, showing that the NCGs can well synergize with GNs to reach a long lifetime (Figure 5c). The G‐NCGs//Zn battery retains 90% of its initial capacitance after 650 cycles and maintains 50% of the initial capacity after 2000 cycles, outperforming most previously reported NZBs (Figure 5d), [ 9a,37 ] for instance, Ni 3 S 4 //Zn battery (83.3% after 100 cycles), [ 14 ] Ni(OH) 2 //Zn‐Al‐LDH@ppy battery (90% after 270 cycles), [ 15a ] Co 3 O 4 @NiO//Zn battery (90% after 500 cycles), [ 15b ] NiCo 2 O 4 //Zn battery (90% after 190 cycles), [ 38 ] NiAlCo‐LDH‐CNT//Zn battery (90% after 600 cycles), [ 13b ] NiO‐CNT//Zn battery (90% after 190 cycles), [ 12a ] NiO–3D Zn battery (80% after 80 cycles), [ 4b ] Ni(OH) 2 //Zn battery (120% after 20 cycles), [ 39 ] Ni‐Zn double hydroxide battery (90% after 16 cycles), [ 11b ] and other Zn‐based batteries. [ 40 ] The SEM images for the G‐NCGs electrode after 2000 cycles (Figure S13a, Supporting Information) clearly show that the morphology of the G‐NCGs was well‐maintained.…”

Section: Resultsmentioning

confidence: 91%

Ni (II) Coordination Supramolecular Grids for Aqueous Nickel‐Zinc Battery Cathodes

Zhang

Zhou

et al. 2021

Adv Funct Materials

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Aqueous rechargeable nickel‐zinc batteries (NZBs) have the advantages of economical cost and reliable safety. Despite reports of success in achieving high‐utilization and stable Zn anodes, the practical application of NZBs has been plagued by the restrictive capacity density and degradation of the Ni‐based cathode. Herein, it is reported that nickel‐ligand coordination grids (NCGs) with a high theoretical capacity of 128.12 mAh g−1 offer a fast faradic reaction while maintaining good reversibility due to the abundant open metal sites and flexible network structures. In situ and ex situ characterizations demonstrate that the graphene nanosheet (GN) modification of NCGs supramolecular substantially boosts surface charge and reducing the work function of supramolecular compounds. A Ni//Zn battery using such a graphene organic‐inorganic material (G‐NCGs) achieve a high gravimetric capacity of 113.8 mAh g−1 at 0.5 A g−1 with 50% of its initial capacitance retained after 2000 cycles and an exceptional rate capacity of 43.3 mAh g−1 even at the current density of 5.0 A g−1.

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“…Furthermore, Ni et al fabricated nanowire NiCo 2 O 4 in situ grown on the Ni foam substrate. [64] Probably because the introduction of foamed Ni improved the conductivity of the material and the morphology control increased the active sites, the nanowire NiCo 2 O 4 cathode exhibited a higher discharge capacity (211.7 mAh g −1 ) than the former report at an average discharge plateau of 1.7 V. To further overcome the disadvantages associated with this material, an ultrathin NiCo 2 O 4 nanosheet (P-NiCo 2 O 4-x ) with good electrochemical performance was prepared using a convenient solvothermal method and synchronously importing oxygen vacancies and phosphate ions. [65] First, oxygen vacancies were not only shallow donors for improving the conductivity of metal oxides but also active positions for electrochemical reactions.…”

Section: Znco 2 O 4 and Nico 2 Omentioning

confidence: 99%

High‐Voltage Zinc‐Ion Batteries: Design Strategies and Challenges

Yan

Ang

Yang

et al. 2021

Adv Funct Materials

162

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(1 of 30)additionally, it leads to reliable and manageable energy delivery. [2] Lithium-ion batteries (LIBs) have been the first choice for EES owing to their remarkable energy density, excellent cycle life, and small volume compared to other rechargeable batteries since they were successfully sold by SONY in 1991. [3] Nevertheless, their widespread applications have been limited due to sterile Li resources, high cost, toxic electrolytes, safety problems, and other disadvantages. [4] To date, environmentally friendly aqueous batteries using multi-valent charge carriers, such as Zn 2+ , Mg 2+ , and Al 3+ , have attracted attention because multiple electrons are involved in the redox reactions during intercalation, as well as higher capacity and energy density can be achieved. However, only a few cathode materials are available for Mg 2+ diffusion, and the passivation of Mg anode greatly restricts the further transport of Mg 2+ ions. Al battery anode also forms a protective oxide (Al 2 O 3 ) film in the aqueous electrolyte, which affects the battery performance. Hence, Mg and Al batteries are under investigation and are still a long way from practical application and commercialization. [5] ZIBs have attracted interest in grid-scale energy storage compared to other energy storage technologies owing to the following advantages: 1) ZIBs can be easily manufactured in an open-air environment, so the total cost of manufacturing ZIBs is much lower than other batteries (Li + /Na + /K + -ion) which require an inert environment for production. [6] 2) The price of Zn (0.5−1.5 $/lb) is much lower than that of Li (8−11 $/lb), and the reserves of Zn (79 ppm) are approximately four times than those of Li (17ppm). [7] 3) Zn as an anode exhibits a high theoretical volumetric (5855 mAh cm −3 ) and gravimetric capacity (820 mAh g −1 ), low electrochemical potential of −0.762 V versus the standard hydrogen electrode (SHE), and two-electron transfer during redox reaction, contributing to a high-energy density. [8] 4) ZIBs are highly safe, not only because Zn anode is non-toxic and stable in the general environment, but also because a majority of ZIBs electrolytes used are aqueous with higher ionic conductivity (10 −1 −6 S cm −1 ) than flammable and toxic organic solvents (10 −3 −10 −2 S cm −1 ). [9] Furthermore, the normal Zn salts (ZnSO 4

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A high-performance Zn battery based on self-assembled nanostructured NiCo2O4 electrode

Cited by 88 publications

References 45 publications

Flower-like NiCo2O4–CN as efficient bifunctional electrocatalyst for Zn-Air battery

Flower-like NiCo2O4–CN as efficient bifunctional electrocatalyst for Zn-Air battery

Ni (II) Coordination Supramolecular Grids for Aqueous Nickel‐Zinc Battery Cathodes

High‐Voltage Zinc‐Ion Batteries: Design Strategies and Challenges

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