Evidence of Unique Stacking and Related Topological Defects in the Honeycomb Layered Oxide: K2Ni2TeO6

Masese, Titus; Miyazaki, Yoshinobu; Kanyolo, Godwill Mbiti; Takahashi, Terüo; Ito, Miyu; Senoh, Hiroshi; Saito, Tomohiro

doi:10.26434/chemrxiv.12643430

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…3 ). In the case of , there is only one magnetic atom, Ni , however, it is known that the series of the compound can have a slightly different stacking sequence 25 , which can create multiple local magnetic environments, very similar to the case. This scenario is further supported by the fact that the K-ions are indeed dynamic at room temperature (see below).…”

Section: Resultsmentioning

confidence: 99%

Magnetism and ion diffusion in honeycomb layered oxide $${\hbox {K}_2\hbox {Ni}_2\hbox {TeO}_6}$$

Matsubara

Nocerino

Forslund

et al. 2020

Sci Rep

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In the quest for developing novel and efficient batteries, a great interest has been raised for sustainable K-based honeycomb layer oxide materials, both for their application in energy devices as well as for their fundamental material properties. A key issue in the realization of efficient batteries based on such compounds, is to understand the K-ion diffusion mechanism. However, investigation of potassium-ion (K$$^+$$ + ) dynamics in materials using e.g. NMR and related techniques has so far been very challenging, due to its inherently weak nuclear magnetic moment, in contrast to other alkali ions such as lithium and sodium. Spin-polarised muons, having a high gyromagnetic ratio, make the muon spin rotation and relaxation ($$\mu ^+$$ μ + SR) technique ideal for probing ions dynamics in these types of energy materials. Here we present a study of the low-temperature magnetic properties as well as K$$^+$$ + dynamics in honeycomb layered oxide material $${\hbox {K}_2\hbox {Ni}_2\hbox {TeO}_6}$$ K 2 Ni 2 TeO 6 using mainly the $$\mu ^+$$ μ + SR technique. Our low-temperature $$\mu ^+$$ μ + SR results together with complementary magnetic susceptibility measurements find an antiferromagnetic transition at $$T_{\mathrm{N}}\approx 27$$ T N ≈ 27 K. Further $${\mu}^{+}$$ μ + SR studies performed at higher temperatures reveal that potassium ions (K$$^+$$ + ) become mobile above 200 K and the activation energy for the diffusion process is obtained as $$E_{\mathrm{a}}=121 (13)$$ E a = 121 ( 13 ) meV. This is the first time that K$$^+$$ + dynamics in potassium-based battery materials has been measured using $$\mu ^+$$ μ + SR. Assisted by high-resolution neutron diffraction, the temperature dependence of the K-ion self diffusion constant is also extracted. Finally our results also reveal that K-ion diffusion occurs predominantly at the surface of the powder particles. This opens future possibilities for potentially improving ion diffusion as well as K-ion battery device performance using nano-structuring and surface coatings of the particles.

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Section: Resultsmentioning

confidence: 99%

Magnetism and ion diffusion in honeycomb layered oxide $${\hbox {K}_2\hbox {Ni}_2\hbox {TeO}_6}$$

Matsubara

Nocerino

Forslund

et al. 2020

Sci Rep

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“…Diverse host materials, such as graphite, oxides, and sulfides (MoS2, SnS2), were identified as ideal insertion frameworks [172,173]. Recently, layered honeycomb structures (K2Ni2TeO6) have been found to exhibit high stability and ionic conductivity at an operating potential of 4V in potassium bis(trifluorosulfonly)imide, as shown in Figure 13 [174].…”

Section: Materials For K-based Batteriesmentioning

confidence: 99%

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

et al. 2021

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Metal-ion batteries are capable of delivering high energy density with a longer lifespan. However, they are subject to several issues limiting their utilization. One critical impediment is the budding and extension of solid protuberances on the anodic surface, which hinders the cell functionalities. These protuberances expand continuously during the cyclic processes, extending through the separator sheath and leading to electrical shorting. The progression of a protrusion relies on a number of in situ and ex situ factors that can be evaluated theoretically through modeling or via laboratory experimentation. However, it is essential to identify the dynamics and mechanism of protrusion outgrowth. This review article explores recent advances in alleviating metal dendrites in battery systems, specifically alkali metals. In detail, we address the challenges associated with battery breakdown, including the underlying mechanism of dendrite generation and swelling. We discuss the feasible solutions to mitigate the dendrites, as well as their pros and cons, highlighting future research directions. It is of great importance to analyze dendrite suppression within a pragmatic framework with synergy in order to discover a unique solution to ensure the viability of present (Li) and future-generation batteries (Na and K) for commercial use.

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“…[55,56] A few reports on disorders embodied by skipping or disappearance of the stack layers (or what is referred to as dislocations) in oxide materials have also been recently availed. [57,58] Thus, the edge dislocations observed in Na2Ni2TeO6, can be seen as an indication of the existence of new topological disorders such as curvature which may rationalise the superior physicochemical properties of Na2Ni2TeO6.…”

Section: Electron Diffraction Patterns Taken Along Multiple Zone Axes In Na2ni2teo6mentioning

confidence: 99%

“…In layered materials, stacking disorders in the arrangement of the layers (stacking faults) occur predominantly perpendicular to the slabs, enlisting a variety of dislocations in some domains, particularly edge and screw dislocations. [57,58] Such dislocations are uniquely identified by two characteristic vectors, namely the Burgers vector and the sense vector (points along the dislocation line). For instance, in edge dislocations, these vectors are perpendicular to each other, thus requiring regions of shear, strain and stress to form in the crystal.…”

Section: Introductionmentioning

confidence: 99%

Unveiling Structural Disorders in Honeycomb Layered Oxide: Na2Ni2TeO6

Masese

Miyazaki

Rizell³

et al. 2020

Preprint

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Honeycomb layered oxides have garnered tremendous research interest in a wide swath of disciplines owing to not only the myriad physicochemical properties they exhibit, but also due to their rich crystal structural versatility. Herein, a comprehensive crystallographic study of a sodium-based Na2Ni2TeO6 honeycomb layered oxide has been performed using atomic-resolution transmission electron microscopy, elucidating a plethora of atomic arrangement (stacking) disorders in the pristine material. Stacking disorders in the arrangement honeycomb metal slab layers (stacking faults) occur predominantly perpendicular to the slabs with long-range coherence length and enlisting dislocations in some domains. Moreover, the periodic arrangement of the distribution of alkali atoms is altered by the occurrence of stacking faults. The multitude of disorders innate in Na2Ni2TeO6 envisage broad implications in the material functionalities of related honeycomb layered oxide materials and will bolster renewed interest in their material science.

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Evidence of Unique Stacking and Related Topological Defects in the Honeycomb Layered Oxide: K2Ni2TeO6

Cited by 4 publications

References 38 publications

Magnetism and ion diffusion in honeycomb layered oxide $${\hbox {K}_2\hbox {Ni}_2\hbox {TeO}_6}$$

Magnetism and ion diffusion in honeycomb layered oxide $${\hbox {K}_2\hbox {Ni}_2\hbox {TeO}_6}$$

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

Unveiling Structural Disorders in Honeycomb Layered Oxide: Na2Ni2TeO6

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