Se/CNTs microspheres as improved performance for cathodes in Li-Se batteries

Feng, Nanxiang; Xiang, Kaixiong; Xiao, Li; Chen, Wenhao; Zhu, Yirong; Liao, Haiyang

doi:10.1016/j.jallcom.2019.01.348

Cited by 20 publications

(5 citation statements)

References 38 publications

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“…With increasing temperature, the 252 cm –1 peak decreased and became negligible at 400 °C. This trend is consistent with the thermogravimetric analysis (TGA) of Se, whose melting temperature is ∼380 °C. , …”

Section: Resultssupporting

confidence: 88%

“…This trend is consistent with the thermogravimetric analysis (TGA) of Se, whose melting temperature is ∼380 °C. 37,38 Figure 2c magnified the Raman spectra of samples deposited at 500−750 °C under a stronger laser intensity (25%). Here we attribute the most prominent peaks at 219 and 282 cm −1 to the in-plane E 2g mode and the out-of-plane A 1g mode of Nb 2 Se 3 , respectively, by analogue from the A 1g and E 2g peaks of the 2H-NbSe 2 thin films.…”

Section: Effects Of Substratementioning

confidence: 99%

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Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li⁺ and Na⁺ Storage

Li,

Yuan,

Dong

et al. 2024

ACS Appl. Energy Mater.

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Chalcogen elements, typically sulfur and selenium, could be used for energy storage either in elemental form based on Q/Q 2− redox or in layered transition metal chalcogenides, which allow insertion/extraction of Li + /Na + /K + /Mg 2+ . These two types of chalcogen-containing materials were rarely discussed together because of their significantly different synthetic routes, except for being mentioned in regard to the over-reduction of chalcogenides into elemental chalcogens. Recently, in attempts to deposit Nb 2 Se 2 C MXene by ablating a Nb−Se−C target using a 1064 nm fiber laser, a series of selenium-containing thin films were obtained as model electrodes. It was discovered that substrate temperature strongly affected the composition, structure, and accordingly the electrochemical performance of these thin films. From room temperature (RT) to 100 °C, the thin films were amorphous and selenium-abundant. Niobium mainly aggregated in metallic form. Both the Raman scattering and Li + storage performances were close to those of a pure selenium cathode. With increasing substrate temperature, selenium partially evaporated to vacuum and partially reacted with Nb to form layered NbSe 2 at ∼300 °C and layered Nb 2 Se 3 at above 400 °C. All these thin films exhibited Li + storage capacity of over 600 mAh g −1 and Na + storage capacity of over 350 mAh g −1 (except for the RT-Na sample) at the charge/discharge rate of 0.1 A g −1 . These discoveries reveal the structural evolution from near elemental selenium to layered niobium selenides and their Li + /Na + storage capability. It also demonstrates the feasibility of the 1064 nm laser for depositing high-performance and binder-free thin film electrodes.

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Section: Resultssupporting

confidence: 88%

Section: Effects Of Substratementioning

confidence: 99%

Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li⁺ and Na⁺ Storage

Li,

Yuan,

Dong

et al. 2024

ACS Appl. Energy Mater.

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“…Similarly, the binding energies of C and O also match the standard spectra well, as demonstrated by Fig. 5(e,f) [30][31][32] . Therefore, the graphene sheets are composed of CZNS@W on the surface, which is a good chemical state for the G-CZNS@W CE.…”

Section: X-ray Photoelectron Analysissupporting

confidence: 69%

“…From the CZNS spectra, two distinct peaks at (280 and 500) cm −1 confirm the E 2g peak of the metal hybrid in the composite. The Raman spectra of WO 3 nanorod located at (135 and 270) cm −1 can be attributed to the antisymmetric stretching vibration of (W-O-W) and bending mode of the (W-O-W) bonds 32 . Moreover, two distinct peaks of the D and G bands at (1,348 and 1,590) cm −1 , respectively, were observed in the G-CZNS@W. The D band is related to the edges or disordered layers, while the G band corresponds to the E 2g mode of sp 2 carbon atom 33 .…”

Section: Raman Spectra Analysismentioning

confidence: 99%

Hybrid of Graphene based on quaternary Cu2ZnNiSe4 –WO3 Nanorods for Counter Electrode in Dye-sensitized Solar Cell Application

Cho

Jung

et al. 2020

Sci Rep

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A novel nanohybrid of graphene-based Cu 2 ZnniSe 4 with WO 3 nanorods (G-CZNS@W) was successfully synthesized via a simple hydrothermal method to use as a counter electrode (ce) for dye-sensitized solar cells (DSSCs). The characterization technique confirmed the structural and morphologies of the G-CZNS@W nanohybrid, which could show rapid electrons transfer pathway through the WO 3 nanorods. Moreover, the as-fabricated G-CZNS@W nanohybrid exhibited synergetic effect between G-cZnS and a Wo 3 nanorod, which could affect the electrocatalytic activity towards triiodide reaction. The nanohybrid exhibits an excellent photovoltaic performance of 12.16%, which is higher than that of the standard pt electrode under the same conditions. the G-cZnS@W nanohybrid material as ce thus offers a promising low-cost Pt-free counter electrode for DSSC. Extracting energy from fossil fuels is the major cause of environmental pollution. Solar energy, a source of renewable energy, could be considered as an alternative source of energy. Dye-sensitized solar cells (DSSCs) are the most promising renewable energy devices, as was reported by Michael Grätzel in 1991 1. These DSSCs devices have been introduced into the market to convert the renewable incident solar radiation into electricity with high power conversion efficiency, low-cost fabrication, and in an environmentally benign manner 2. Generally, DSSCs consist of (1) the working electrode, which is coated by a thin, mesoporous layer of a semiconductor, usually TiO 2 , on whose surface a monolayer of dye molecules is adsorbed; and (2) the counter electrode, which is coated with a thin catalyzer layer, usually Pt electrode. The space between the two electrodes is filled with an electrolyte containing a redox couple (often I − /I 3 −) 3,4. Major research efforts have been undertaken to find alternatives to the traditional Pt CE. Because of its high cost and low resources, a better alternative to Pt is required for commercial applications. Some of the counter electrodes with high efficiency reported so far have included carbonaceous materials, such as carbon 5 , graphene 6 , and N-doped carbon 7 ; polymers, such as Polyaniline nanotube 8 , PEDOT:PSS/halloysite 9 , and poly α-naphtylamine 10 ; metal sulphides, such as PbS 11 , FeS 2 12 , and CoS 2 13 ; metal oxides, such as CoFe 2 O4 14 , MnO 2 15 , and WO 3 16 ; and quaternary material, such as Cu 2 ZnSnS 4 17

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“…In ASSLSeBs, metallic Li was chosen as the optimal choice for anode due to its exceptionally excellent theoretical capacity (3860 mAh g −1 ) and the lowest electrochemical potential (−3.040 V vs. SHE), [119][120][121][122] further the volumetric capacity of LSeBs is beneficial to application (3260 mAh cm −3 ). 123,124 Nevertheless, Li metal as anodes still faces issues regarding the growth of Li dendrites during the process of plating and stripping. These dendrites form due to the unstable interface between Li metal and the SSE.…”

Section: Design Of the LI Anodementioning

confidence: 99%

A review of all‐solid‐state lithium‐selenium batteries

Guo,

Zhang,

Tang

et al. 2023

Battery Energy

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Rechargeable lithium‐selenium batteries (LSeBs) are promising candidates for next‐generation energy storage systems due to their exceptional theoretical volumetric energy density (3253 mAh cm−3). However, akin to lithium‐sulfur batteries, the adoption of LSeBs has been hampered by problems such as polyselenides migration in liquid electrolytes, uncontrolled dendrite growth and safety concerns. To overcome these issues, researchers proposed to use the solid‐state electrolytes (SSEs) as a method, which could mitigate the formation of polyselenides. However, practical utilization of the all‐solid‐state Li‐Se batteries (ASSLSeBs) face significant obstacles, including sluggish redox kinetics during Se conversion (Se ↔ Li2Se), inadequate interfacial contact and formation of Li dendrites. Scientists have applied strategies to tackle these challenges. This article offers a timely review of emerging strategies. The article begins by conducting a detailed analysis of the working principles of ASSLSeBs and identifying the critical challenges that hinder practical application. Subsequently, the article presents a comprehensive summary of various strategies aimed at boosting the development of ASSLSeBs, which encompass advancements in Se cathode materials, optimization of SSEs, design of stable Li anodes, and approaches in addressing the interfacial challenge. Finally, the article offers further perspectives about promoting the application of ASSLSeBs. It highlights the need for continued research and development to overcome existing limitations. Overall, by understanding these emerging strategies, researchers could enhance the technology of LSeBs, bringing us closer to the practical realization of high‐energy storage systems.

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Se/CNTs microspheres as improved performance for cathodes in Li-Se batteries

Cited by 20 publications

References 38 publications

Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li⁺ and Na⁺ Storage

Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li⁺ and Na⁺ Storage

Hybrid of Graphene based on quaternary Cu2ZnNiSe4 –WO3 Nanorods for Counter Electrode in Dye-sensitized Solar Cell Application

A review of all‐solid‐state lithium‐selenium batteries

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Se/CNTs microspheres as improved performance for cathodes in Li-Se batteries

Cited by 20 publications

References 38 publications

Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li+ and Na+ Storage

Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li+ and Na+ Storage

Hybrid of Graphene based on quaternary Cu2ZnNiSe4 –WO3 Nanorods for Counter Electrode in Dye-sensitized Solar Cell Application

A review of all‐solid‐state lithium‐selenium batteries

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Product

Resources

About

Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li⁺ and Na⁺ Storage

Nb–Se–C Thin Films Deposited by a 1064 nm Laser as Model Electrodes for Li⁺ and Na⁺ Storage