Improvement of Seebeck coefficient in as-grown Bi2Te3-ySey electrodeposited films by the addition of additives and bath optimization

Caballero‐Calero, Olga; Borca-Tasciuc, Diana-Andra; Martínez‐Moro, Rut; Gorog, András; Mohner, Melissa; Borca‐Tasciuc, Theodorian; Martín‐González, Marisol

doi:10.1016/j.electacta.2018.03.025

Cited by 7 publications

(3 citation statements)

References 29 publications

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“…In the past, mostly the researchers gave greater emphasis to inorganic conductors and semiconductors as TE materials, for example, Bi 2 Te 3 CoSb 3 , Mg 2 Si, PbTe, and their alloys. Calero et al prepared the Bi 2 Te 3y Se y electrodeposited thin films and achieved a Seebeck coefficient of 120 µVK -1 for as-deposited films [12]. A Seebeck coefficient of 138 µVK -1 has been reported by Danine et al for P-type Bi-Sb-Te 60 nm nanowire [13].…”

Section: Zt = (S 2 σT)/kmentioning

confidence: 93%

Crosslinked thermoelectric hydro-ionogels: A new class of highly conductive thermoelectric materials

Sajid

Sabri

Said

et al. 2019

Energy Conversion and Management

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In this work, a new class of highly-conductive chemically cross-linked gel has been synthesized by the confinement of water and IL N, N, N triethyl octyl ammonium bromide ([N 2228 ] Br) in polyethylene glycol dimethacrylate (PEGDMA) matrix, using in situ thermally initiated radical polymerization loaded with 1 wt. % free radical initiator azobisisobutyronitrile (AIBN). This novel gel was named as hydroionogel (HIG). The thermoelectric properties of HIG such as ionic conductivity, Seebeck coefficient, and thermal conductivity were measured and owing to its high thermoelectric performance, we referred to this as crosslinked thermoelectric hydro-ionogel, henceforth will be denoted by X-TEHIG. For all the measurements, coin cells were fabricated using commercial LIR 2032 stainless steel battery casings with X-TEHIG sandwiched between the two graphene electrodes. The ionic conductivity of X-TEHIG was examined via AC impedance spectroscopy technique by using a Gamry apparatus. Remarkably, the ionic conductivity of X-TEHIG was higher than that of neat [N 2228 ] Br. A linear increase in ionic conductivity of X-TEHIG as a function of temperature was recorded that showed a considerably higher value of 74 mScm -1 at 70 °C. The origin of this high conductivity is attributed to interactions between PEGDMA monomers and cations and anions of the IL and formation of hydrogen bonds between water and Branion, O-H•••Br -. X-TEHIG demonstrated a higher Seebeck coefficient of 1.38 mVK -1 . The Fourier transform infrared (FTIR) spectroscopy results revealed the successful polymerization of X-TEHIG by the disappearance of C=C peak of methacrylate group in the spectrum of PEGDMA. These results suggest that X-TEHIG may be a potential candidate for thermoelectric applications owing to their high values of ionic conductivity and Seebeck coefficient.

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Section: Zt = (S 2 σT)/kmentioning

confidence: 93%

Crosslinked thermoelectric hydro-ionogels: A new class of highly conductive thermoelectric materials

Sajid

Sabri

Said

et al. 2019

Energy Conversion and Management

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“…Normally, additives such as ethylenediaminetetraacetic acid (EDTA) are used because it forms a complex with bismuth and thus reduces its diffusion coefficient, or sodium lignosulfonate (SLS) (Kuleshova et al, 2010; Naylor et al, 2012; Caballero-Calero et al, 2014; Abad et al, 2015) which is used in the electrodeposition of tellurium and selenium because it reduces the crystallite size; this additive allows the formation of films with less roughness and favors the [110] orientation. Furthermore, White's and Martin-Gonzalez's groups observed an improvement in the Seebeck coefficient of Bi 2 Te 3 films (Kuleshova et al, 2010; Caballero-Calero et al, 2014) and Se doped-BiTe films (Caballero-Calero et al, 2018) with the use of lignosulfonates like sodium lignosulfonate (SLS) in the solution. Nevertheless, the effect of additives is still to be studied in nanowires.…”

Section: Electrodeposition Of Bi2te3 Nanowiresmentioning

confidence: 99%

Electrodeposition of V-VI Nanowires and Their Thermoelectric Properties

Manzano

Martín‐González

2019

Front. Chem.

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Nanostructuration is an intensive field of research due to the appearance of interesting properties at the nanoscale. For instance, in thermoelectricity the most outstanding improvements obtained lately are related to phenomena that appear as a result of nano-engineering different materials. The thermoelectric effect is the direct conversion from temperature gradients into electricity and vice versa . When going to low dimensions, for example in the particular case of thermoelectric nanowires, the transport properties of phonons are modified with respect to those found in bulk leading to a higher thermoelectric figure of merit z . In more detail, this review tries to compile some of the landmarks in the electrodeposition of Bi 2 Te 3 -based nanowires. We will focus on the achievements using different templates, electrolytes and deposition modes. We will also summarize the measurements performed in those nanowires and the main conclusions that can be extracted from the published works. Finally, an update of nanowire-based thermoelectric generators is also included.

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“…Notable efforts have been made to enhance the Seebeck coefficient in electronic TE materials. For example, Bi2Te3-ySey electrodeposited thin films achieved a Seebeck coefficient of 120 µV/K [16], and nanowires of P-type Bi-Sb-Te exhibited a Seebeck coefficient of 138 µV/K [17]. Furthermore, Ag2Se-based n-type materials demonstrated a thermoelectric figure of merit of 1.2 at room temperature, with a Seebeck coefficient of approximately -200 µV/K [18].…”

Section: Introductionmentioning

confidence: 99%

High thermoelectric performance of multiwalled carbon nanotubes based ionogels

Sajid,

Aslfattahi,

Salleh

et al. 2024

Materials Today Communications

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Improvement of Seebeck coefficient in as-grown Bi2Te3-ySey electrodeposited films by the addition of additives and bath optimization

Cited by 7 publications

References 29 publications

Crosslinked thermoelectric hydro-ionogels: A new class of highly conductive thermoelectric materials

Crosslinked thermoelectric hydro-ionogels: A new class of highly conductive thermoelectric materials

Electrodeposition of V-VI Nanowires and Their Thermoelectric Properties

High thermoelectric performance of multiwalled carbon nanotubes based ionogels

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