Lithium storage kinetics of highly conductive F-doped SnO2 interfacial layer on lithium manganese oxide surface

Shin, Dong-Yo; Koo, Bon‐Ryul; Ahn, Hyo‐Jin

doi:10.1016/j.apsusc.2019.144057

Cited by 21 publications

(16 citation statements)

References 52 publications

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“…All FTO films fabricated by the HUSPD process showed characteristic diffraction peaks at 26.61°, 33.89°, 38.10°, and 51.78°, corresponding to the (110), (101), (200), and (211) planes of the SnO2 phase (JCPDS (Joint Committee on Powder Diffraction Standards) card No. #88-0287) [30]. In the bare FTO case, the lowest crystallinity was detected due to the low pyrolysis temperature of 350 °C and relatively short deposition time compared to the net-patterned FTO films [31].…”

Section: Structral and Chemical Propertiesmentioning

confidence: 95%

“…Due to the existence of stainless meshes and the difference of spacing sizes of them, the loading amount of sprayed precursor droplets onto the substrate was varied for each sample. Thus, for comparison, we adjusted the deposition time (15,35,30, and 25 min for the bare FTO, 60M-FTO, 40M-FTO, and 24M-FTO) to collect FTO samples with similar sheet resistance (~8 Ω/□).…”

Section: Methodsmentioning

confidence: 99%

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Net-Patterned Fluorine-Doped Tin Oxide to Accelerate the Electrochromic and Photocatalytic Interface Reactions

2021

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In this study, the surface morphology of net-patterned fluorine-doped tin oxide (FTO) films was optimized with mesh sizes (60 mesh, 40 mesh, and 24 mesh) using the one-pot horizontal ultrasonic spray pyrolysis deposition (HUSPD) process. The 40M-FTO sample exhibited optimized electrical and optical properties due to the improved crystallinity and net-patterned surface morphology of FTO. The electrochromic (EC) electrodes fabricated with 40M-FTO showed superior EC performance, including transmittance modulation (ΔT, 58.7%), switching speeds (4.1 s for coloration and 5.9 s for bleaching), and coloration efficiency (CE, 52.4 cm2/C). These optimum values were attributed to the combined effect of the enhanced electrical properties from the improved crystallinity of the SnO2 and the high transmittance with a large surface area stemming from the optimization of the net-patterned FTO surface morphology. Moreover, the improved reaction sites with large surface area and enhanced electrical conductivity can facilitate the photocatalytic reaction. Accordingly, we suggest our novel strategy for use in creating promising transparent conducting electrodes that can be fabricated with net-patterned FTO to realize enhanced electrochromic and photocatalytic interface reactions.

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Section: Structral and Chemical Propertiesmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

Net-Patterned Fluorine-Doped Tin Oxide to Accelerate the Electrochromic and Photocatalytic Interface Reactions

2021

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“…The commonly employed methods to obtain FTO substrates involve chemical reactions on glass substrate, which can be heated and/or subjected to an additional thermal treatment step to produce fluorine‐doped tin oxide. Chemical precursors like SnCl 4 , SnCl 2 , C 4 H 9 SnC 13 and NH 4 F, CF 3 COOH have been used as tin and fluoride source in chemical spray pyrolysis, ultrasonic spray pyrolysis, atmosphere pressure chemical vapor deposition, electrochemical deposition at atmospheric pressure, not exclusively 44,46–49 . Considering that the precursors can be prepared in aqueous, acid, organic solutions and a mixture of them, hydrogen interaction is facilitated on the hydrophilic surface of silicate‐based glass substrates, on which O − ions, [glass](OH) − , acts as nucleation sites for heterogeneous surface reactions.…”

Section: Temperature Effects On Tco Substratementioning

confidence: 99%

“…In both processes, the dopant concentration and temperature have an important role on the FTO deposition rate. In general aspects and considering the usually employed chemicals, the global reaction for FTO deposition onto glass substrate submitted to a temperature able to promote thermal decomposition of byproducts can be expressed as: 47

{SnCl}_{4} + 4 {NH}_{4} F + 2 {normalH}_{2} O \to F : {SnO}_{2} + 3 HCl (false↑) + {NH}_{4} Cl (false↑) + HF false(false↑ false)

…”

Section: Temperature Effects On Tco Substratementioning

confidence: 99%

Revealing the synergy of Sn insertion in hematite for next‐generation solar water splitting nanoceramics

Bedin

Freitas

Tofanello

et al. 2020

Int J Ceramic Engine & Sci

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Solar water splitting-driven hydrogen fuel production is very attractive due to positive aspects as higher energy density and a renewable energy source arising from water and sunlight. 1 Despite these remarkable overall strengths, sustainable largescale clean hydrogen production is quite far from being available, in particular by the lack of efficient and economically viable electrodes for photoelectrochemical (PEC) cells. These devices involve two redox electrochemical reactions: hydrogen evolution on the cathode and oxygen evolution on the anode, where one or more photosensitive material can be enforced in the device design. 2 It is worth mentioning that oxygen evolution reaction (OER) is the rate-determining step of the photoelectrochemical water splitting, because of the four-electron reaction mechanism of water oxidation, which

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“…These problems are related to the limited redox reaction rates of electrons and Li + ions, exfoliation of the electrode at the current collector by a volume dilatation, and dissolution of active materials, with corrosion of the current collector. 7,8 To overcome these problems, interfacial engineering is crucial strategy used to enhance the mechanical, electrochemical, and chemical stabilities of LIBs by designing a geometrical structure of interfaces. In terms of active materials, various studies have been conducted to prevent volume expansion, dissolution, and unstable surface reactions using the surface coating method (eg, LiAlO 2 coated LMO, 9 NB-doped TiO 2 coated LMO, 10 Li 2 CO 3 /LiNbO 3 coated NCM622, 11 and LiAlO 2 @Al 2 O 3 coated NCA 12 ).…”

Section: Introductionmentioning

confidence: 99%

Carbon quantum dot‐laminated stepped porous Al current collector for stable and ultrafast lithium‐ion batteries

Sung

Kim

Ahn

2022

Intl J of Energy Research

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Designing an interfacial architecture between the current collector and electrode plays a serious role in developing the specific capacity with cycling stability of lithium-ion batteries (LIBs). Consequently, an original approach to enhance the structure of the interface between the current collector and electrode is necessary. Thus, we developed a novel interface architecture based on carbon quantum dots (CQDs)-laminated on a stepped porous Al (SP-Al) current collector to attain stable and ultrafast-discharge LIBs and CQD-SP-Al for application as LIB cathodes. To this end, the electrochemical etching and ultrasonic spray coating methods were employed. The cathode assembled with CQD-SP-Al displayed the adhesion enhancing, an increased redox reaction kinetics, and the magnificent interfacial stability of the current collector//electrode interface because of the increased surface roughness, stepped pores with N-doped CQD, and uniform CQD lamination layer. The resultant cathode with CQD-SP-Al showed an enhanced specific capacity of 78.2 mAh/g and capacity retention of 92.6% at a high C-rate of 10C after 500 cycles. This great cycling stability is due to an expanded interfacial contact area of current collector// electrode with improved adhesion, as well as to the CQD lamination layer, while the excellent ultrafast discharge capacity is ascribed to the risen number of charge supplying/collecting sites, the stepped porous structure, and the highly conductive N-doped CQD lamination layer.

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Lithium storage kinetics of highly conductive F-doped SnO2 interfacial layer on lithium manganese oxide surface

Cited by 21 publications

References 52 publications

Net-Patterned Fluorine-Doped Tin Oxide to Accelerate the Electrochromic and Photocatalytic Interface Reactions

Net-Patterned Fluorine-Doped Tin Oxide to Accelerate the Electrochromic and Photocatalytic Interface Reactions

Revealing the synergy of Sn insertion in hematite for next‐generation solar water splitting nanoceramics

Carbon quantum dot‐laminated stepped porous Al current collector for stable and ultrafast lithium‐ion batteries

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