Crystal structure and mechanical properties of nickel–cobalt alloys with different compositions: A first-principles study

Liu, Peng; Chen, Dengfu; Wang, Qinzheng; Pang, Xu; Long, Mujun; Duan, Huamei

doi:10.1016/j.jpcs.2019.109194

Cited by 32 publications

(8 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of eNiCo alloy coatings, the XRD diffractogram ( Figure 9 c) primarily showed the solid solution nature formed on alloying Co with Ni, which is evident from the presence of single fcc phase. This can be explained from the phase diagram of the NiCo alloy system, wherein the primary fcc phase occurs for Co A content up to 65.5 at%, beyond which the alloy crystallizes with predominant hexagonal closed pack (hcp) phase [ 39 , 40 ]. As described in Section 4.2 , and listed in Table 2 , the Co A content in the eNiCo alloy coating samples varied in the range of 15.1–34.4 wt% and, hence, the XRD diffractograms showed the fcc phase corresponding to Ni-rich alloys.…”

Section: Resultsmentioning

confidence: 99%

Influence of Bath Hydrodynamics on the Micromechanical Properties of Electrodeposited Nickel-Cobalt Alloys

2021

View full text Add to dashboard Cite

The influence of bath hydrodynamics on the resultant micromechanical properties of electrodeposited nickel-cobalt alloy system is investigated. The bath hydrodynamics realized by magnetic stirring is simulated using COMSOL Multiphysics and a region of minimum variation in velocity within the electrolytic cell is determined and validated experimentally. Nickel-cobalt alloy and nickel coating samples are deposited galvanostatically (50 mA/cm2) with varying bath velocity (0 to 42 cm/s). The surface morphology of samples gradually changed from granular (fractal dimension 2.97) to more planar (fractal dimension 2.15) growth type, and the according average roughness decreased from 207.5 nm to 11 nm on increasing the electrolyte velocity from 0 to 42 cm/s for nickel-cobalt alloys; a similar trend was also found in the case of nickel coatings. The calculated grain size from the X-ray diffractograms decreased from 31 nm to 12 nm and from 69 nm to 26 nm as function of increasing velocity (up to 42 cm/s) for nickel-cobalt and nickel coatings, respectively. Consecutively, the measured Vickers microhardness values increased by 43% (i.e., from 393 HV0.01 to 692 HV0.01) and by 33% (i.e., from 255 HV0.01 to 381 HV0.01) for nickel-cobalt and nickel coatings, respectively, which fits well with the Hall–Petch relation.

show abstract

Section: Resultsmentioning

confidence: 99%

Influence of Bath Hydrodynamics on the Micromechanical Properties of Electrodeposited Nickel-Cobalt Alloys

2021

View full text Add to dashboard Cite

show abstract

“…39,40 The Co−Ni phase diagram indicates that the hardness of CoNi alloys increases as the cobalt content increases. 41,42 Thus, increasing the cobalt content in the crystal is beneficial for the stability of the structure. ICP-OES and EDS were used to analyze the proportion of Co, Ni, and Fe and the average metal weight percent of bare and carbonized CoNiFe-MOF-74 (Table S1).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Selective Reduction of Multivariate Metal–Organic Frameworks for Advanced Electrocatalytic Cathodes in High Areal Capacity and Long-Life Lithium–Sulfur Batteries

Kaid,

Shehab,

Fang

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Lithium−sulfur batteries hold great promise as nextgeneration high-energy-density batteries. However, their performance has been limited by the low cycling stability and sulfur utilization. Herein, we demonstrate that a selective reduction of the multivariate metal−organic framework, MTV-MOF-74 (Co, Ni, Fe), transforms the framework into a porous carbon decorated with bimetallic CoNi alloy and Fe 3 O 4 nanoparticles capable of entrapping soluble lithium polysulfides while synergistically facilitating their rapid conversion into Li 2 S. Electrochemical studies on coin cells containing 89 wt % sulfur loading revealed a reversible capacity of 1439.8 mA h g −1 at 0.05 C and prolonged cycling stability for 1000 cycles at 1 C/1060.2 mA h g −1 with a decay rate of 0.018% per cycle. At a high areal sulfur loading of 6.9 mg cm −2 and lean electrolyte/sulfur ratio (4.5 μL:1.0 mg), the battery based on the 89S@CoNiFe 3 O 4 /PC cathode provides a high areal capacity of 6.7 mA h cm −2 . The battery exhibits an outstanding power density of 849 W kg −1 at 5 C and delivers a specific energy of 216 W h kg −1 at 2 C, corresponding to a specific power of 433 W kg −1 . Density functional theory shows that the observed results are due to the strong interaction between the CoNi alloy and Fe 3 O 4 , facilitated by charge transfer between the polysulfides and the substrate.

show abstract

Section: Resultsmentioning

confidence: 99%

“…3(b), the lattice constants follow the lattice constant of the bulk Ni (a 0 = 3.528 Å), denoted as a dotted green line, within the limits of the standard mean deviation. 40,50 This suggests that lattice strain of the Ni layer is different for thinner films on a buffered organic layer and a bare Si substrate. 51,52 Since the thicknessdependent d (111) values of Ni/rubrene/Si are similar to those of Ni/Si, we used a common approach to estimate the lattice strain (e) in our samples with the relation e = (a À a 0 )/a 0 , where a 0 is the lattice constant of the bulk material and a is the lattice constant calculated from the XRD patterns through…”

Section: Structural Characteristicsmentioning

confidence: 99%

Impact of a rubrene buffer layer on the dynamic magnetic behavior of nickel layers on Si(100)

Tanguturi,

Tsai,

et al. 2023

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Crystal structure and mechanical properties of nickel–cobalt alloys with different compositions: A first-principles study

Cited by 32 publications

References 39 publications

Influence of Bath Hydrodynamics on the Micromechanical Properties of Electrodeposited Nickel-Cobalt Alloys

Influence of Bath Hydrodynamics on the Micromechanical Properties of Electrodeposited Nickel-Cobalt Alloys

Selective Reduction of Multivariate Metal–Organic Frameworks for Advanced Electrocatalytic Cathodes in High Areal Capacity and Long-Life Lithium–Sulfur Batteries

Impact of a rubrene buffer layer on the dynamic magnetic behavior of nickel layers on Si(100)

Contact Info

Product

Resources

About