Hierarchical Bi2Se3 microrods: microwave-assisted synthesis, growth mechanism and their related properties

Xu, Haiming; Chen, Gang; Jin, Rencheng; Pei, Jian; Wang, Yu

doi:10.1039/c2ce26678d

Cited by 41 publications

(42 citation statements)

References 51 publications

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“…After the 50th cycle, the specific discharge capacity was found to be 235 mAhg −1 as depicted in Figure 9b [93]. The cyclic capacity of bulk Bi 2 X 3 after 50 cycles was found to be higher than the reported values for liquid electrolytes [57,65,68,69,72,74,76,94]. A comparison of the values in tabular form is given in Table 1.…”

Section: Bismuth Chalcogenides As the Anode In All-solid-state Lithiumentioning

confidence: 84%

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Implementation of Bismuth Chalcogenides as an Efficient Anode: A Journey from Conventional Liquid Electrolyte to an All-Solid-State Li-Ion Battery

et al. 2020

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Bismuth chalcogenide (Bi2X3; X = sulfur (S), selenium (Se), and tellurium (Te)) materials are considered as promising materials for diverse applications due to their unique properties. Their narrow bandgap, good thermal conductivity, and environmental friendliness make them suitable candidates for thermoelectric applications, photodetector, sensors along with a wide array of energy storage applications. More specifically, their unique layered structure allows them to intercalate Li+ ions and further provide conducting channels for transport. This property makes these suitable anodes for Li-ion batteries. However, low conductivity and high-volume expansion cause the poor electrochemical cyclability, thus creating a bottleneck to the implementation of these for practical use. Tremendous endeavors have been devoted towards the enhancement of cyclability of these materials, including nanostructuring and the incorporation of a carbon framework matrix to immobilize the nanostructures to prevent agglomeration. Apart from all these techniques to improve the anode properties of Bi2X3 materials, a step towards all-solid-state lithium-ion batteries using Bi2X3-based anodes has also been proven as a key approach for next-generation batteries. This review article highlights the main issues and recent advances associated with Bi2X3 anodes using both solid and liquid electrolytes.

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Section: Bismuth Chalcogenides As the Anode In All-solid-state Lithiumentioning

confidence: 84%

“…In doping plays a significant role here due to the enhanced carrier density. The cyclic performance of these In-doped Bi 2 Se 3 nanostructures was higher than Bi 2 Se 3 nanosheets [74,75], microrods [76], etc.…”

Section: Bismuth Chalcogenides Materials As An Efficient Anode For LImentioning

confidence: 91%

Implementation of Bismuth Chalcogenides as an Efficient Anode: A Journey from Conventional Liquid Electrolyte to an All-Solid-State Li-Ion Battery

et al. 2020

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“…Bi 2 Se 3 has been applied in LIBs and exhibited excellent electrochemical storage ability for Li + . Several Bi 2 Se 3 nanostructures, such as nanosheets and microrods, have been designed for Li + storage [ 23 , 24 ]. Furthermore, high free electron densities can effectively improve the rate capability; thus, doping strategies have been employed to create S-doped and In-doped Bi 2 Se 3 [ 25 – 27 ].…”

Section: Introductionmentioning

confidence: 99%

Bi2Se3/C Nanocomposite as a New Sodium-Ion Battery Anode Material

et al. 2018

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Bi2Se3 was studied as a novel sodium-ion battery anode material because of its high theoretical capacity and high intrinsic conductivity. Integrated with carbon, Bi2Se3/C composite shows excellent cyclic performance and rate capability. For instance, the Bi2Se3/C anode delivers an initial capacity of 527 mAh g−1 at 0.1 A g−1 and maintains 89% of this capacity over 100 cycles. The phase change and sodium storage mechanism are also carefully investigated.Electronic supplementary materialThe online version of this article (10.1007/s40820-018-0201-9) contains supplementary material, which is available to authorized users.

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“…Knowledge about the mobility of atoms is necessary, because of its influence on many physical properties and processes, such as mechanical deformation and chemical degradation (Ramachandran et al, 2017). Furthermore, information on the intrinsic migration of atoms around the VdW gap is specifically needed for battery applications (Ali et al, 2013;Xu et al, 2013;Xie et al, 2018), because these migrations can tamper with the mobility of the dopants. Selfdiffusion gives us also a lower limit for the diffusion of dopants, when the dopants do not have excess charge and are smaller, and thus do not cause any lattice distortions (Fahey et al, 1989).…”

Section: Discussionmentioning

confidence: 99%

“…Not only the static point defects, but also the movement of point defects is important. For example, Bi 2 Se 3 shows potential for Li-ion batteries (Ali et al, 2013;Xu et al, 2013), and Bi 2 Se 3 integrated with carbon has already been proven to be a high-performance sodium-ion battery anode material (Xie et al, 2018). Related topological insulators also already have applications in phase change devices.…”

Section: Introductionmentioning

confidence: 99%

Interstitial defects in the van der Waals gap of Bi₂Se₃

Callaert

Bercx

Lamoen

et al. 2019

Acta Crystallogr Sect B

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Bi2Se3 is a thermoelectric material and a topological insulator. It is slightly conducting in its bulk due to the presence of defects and by controlling the defects different physical properties can be fine tuned. However, studies of the defects in this material are often contradicting or inconclusive. Here, the defect structure of Bi2Se3 is studied with a combination of techniques: high-resolution scanning transmission electron microscopy (HR-STEM), high-resolution energy-dispersive X-ray (HR-EDX) spectroscopy, precession electron diffraction tomography (PEDT), X-ray diffraction (XRD) and first-principles calculations using density functional theory (DFT). Based on these results, not only the observed defects are discussed, but also the discrepancies in results or possibilities across the techniques. STEM and EDX revealed interstitial defects with mainly Bi character in an octahedral coordination in the van der Waals gap, independent of the applied sample preparation method (focused ion beam milling or cryo-crushing). The inherent character of these defects is supported by their observation in the structure refinement of the EDT data. Moreover, the occupancy probability of the defects determined by EDT is inversely proportional to their corresponding DFT calculated formation energies. STEM also showed the migration of some atoms across and along the van der Waals gap. The kinetic barriers calculated using DFT suggest that some paths are possible at room temperature, while others are most probably beam induced.

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Hierarchical Bi2Se3 microrods: microwave-assisted synthesis, growth mechanism and their related properties

Cited by 41 publications

References 51 publications

Implementation of Bismuth Chalcogenides as an Efficient Anode: A Journey from Conventional Liquid Electrolyte to an All-Solid-State Li-Ion Battery

Implementation of Bismuth Chalcogenides as an Efficient Anode: A Journey from Conventional Liquid Electrolyte to an All-Solid-State Li-Ion Battery

Bi2Se3/C Nanocomposite as a New Sodium-Ion Battery Anode Material

Interstitial defects in the van der Waals gap of Bi₂Se₃

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Hierarchical Bi2Se3 microrods: microwave-assisted synthesis, growth mechanism and their related properties

Cited by 41 publications

References 51 publications

Implementation of Bismuth Chalcogenides as an Efficient Anode: A Journey from Conventional Liquid Electrolyte to an All-Solid-State Li-Ion Battery

Implementation of Bismuth Chalcogenides as an Efficient Anode: A Journey from Conventional Liquid Electrolyte to an All-Solid-State Li-Ion Battery

Bi2Se3/C Nanocomposite as a New Sodium-Ion Battery Anode Material

Interstitial defects in the van der Waals gap of Bi2Se3

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Interstitial defects in the van der Waals gap of Bi₂Se₃