2007
DOI: 10.1002/adfm.200600997
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Nanophase ZnCo2O4 as a High Performance Anode Material for Li‐Ion Batteries

Abstract: ZnCo2O4 has been synthesized by the low‐temperature and cost‐effective urea combustion method. X‐ray diffraction (XRD), HR‐TEM and selected area electron diffraction (SAED) studies confirmed its formation in pure and nano‐phase form with particle size ∼ 15–20 nm. Galvanostatic cycling of nano‐ZnCo2O4 in the voltage range 0.005–3.0 V versus Li at 60 mA g–1 gave reversible capacities of 900 and 960 mA h g–1, when cycled at 25 °C and 55 °C, respectively. These values correspond to ∼ 8.3 and ∼ 8.8 mol of recyclabl… Show more

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Cited by 585 publications
(536 citation statements)
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“…[48] The anodic curves display two peaks, in which the peak at 0.51 V is related to the multi-step de-alloying process of Li-Zn alloy, and the broad peak at 1.37 V is related to the formation of ZnO according to the redox reaction between Zn and Li 2 O. [49,50] Therefore, the overall reaction process of ZnO UNPs@HPCNFs in LIBs could be described as Equations 1, 2:…”
Section: Resultsmentioning
confidence: 99%
“…[48] The anodic curves display two peaks, in which the peak at 0.51 V is related to the multi-step de-alloying process of Li-Zn alloy, and the broad peak at 1.37 V is related to the formation of ZnO according to the redox reaction between Zn and Li 2 O. [49,50] Therefore, the overall reaction process of ZnO UNPs@HPCNFs in LIBs could be described as Equations 1, 2:…”
Section: Resultsmentioning
confidence: 99%
“…ZnCo 2 O 4 exhibits a normal spinel structure with Zn II ions in the tetrahedral sites and Co III occupying the octahedral ones. This is attributed to the dominating advantage of placing the d 6 ions in octahedral sites, where adoption of the low-spin configuration gives it a decisively favourable Crystal Field Stabilization Energy. 33) Accordingly the ionic radii of the cationic species in this spinel structure are 0.60 and 0.545 ¡ for the Zn II inferred from DTATG gradually proceeds after the decomposition of the oxalate precursor.…”
Section: )mentioning
confidence: 99%
“…3), 6) In the same way, solid solutions of nominal composition Zn x Co 3¹x O 4 exhibit improved adsorbent capabilities so they find application as selective catalysts for oxidation and hydrogenation reactions, 7) as well as for the monitoring and removal of harmful species such as Cl 2 , NO 2 , CO 2 and H 2 S among others. 8)10) Finally in the last years its magnetic behaviour, either as a single compound or as an impurity phase in the Zn 1¹x Co x O system, is under investigation in the field of room temperature ferromagnetic diluted semiconductors for spintronic applications.…”
Section: Introductionmentioning
confidence: 99%
“…Many avenues have been followed to accomplish these objectives, and several mechanisms, such as defects [4] or carrier mediation [5], have been proposed to explain the occasional observations of long-range magnetic order, often based on large hole concentrations [6] or oxygen vacancies in doped ZnO [7]. For ZnCo 2 O 4 , on the other hand, which is widely known as anode material in lithium batteries [8] and as crystalline, or amorphous p-type gate in junction field-effect transistors [9], it has also been reported that the provided oxygen partial pressure during growth can change the conduction type and even the magnetic properties from paramagnetic to ferromagnetic [10]. Other studies, however, observed weak antiferromagnetism at low temperatures when no extra oxygen is provided [11,12].…”
Section: Introductionmentioning
confidence: 99%