New tin-based materials containing cobalt and carbon for lithium-ion batteries

Ortiz, Gregório F.; Alcántara, Ricardo; Rodríguez, Inés

doi:10.1016/j.jelechem.2007.03.022

Cited by 55 publications

(49 citation statements)

References 25 publications

(50 reference statements)

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“…single phase SnCo 3 C. Ortiz et al prepared (CoSn 3 ) 0.6 C 0.4 by ball milling the materials for 2 h, followed by annealing at 7501C and a HCl treatment to remove impurities (sample 19 in Reference [46]). The first recharge capacity of this material was measured to be 575 mA h g -1…”

Section: Preparation Of Sn-co-c By Mechanical Millingmentioning

confidence: 99%

Tin-based materials as negative electrodes for Li-ion batteries: Combinatorial approaches and mechanical methods

Todd

Ferguson

Fleischauer

et al. 2010

Int. J. Energy Res.

141

106

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SUMMARYGraphite has been used as the negative electrode in lithium-ion batteries for more than a decade. To attain higher energy density batteries, silicon and tin, which can alloy reversibly with lithium, have been considered as a replacement for graphite. However, the volume expansion of these metal elements upon lithiation can result in poor capacity retention. Alloying the active metal element with an inactive material can limit the overall volume expansion and improve cycle life. This paper presents a summary of tin-based materials as negative electrodes. After reviewing attempts to improve and understand the electrochemical behaviour of metallic tin and its oxides, the focus turns to alloys of tin with a transition metal (TM) and, optionally, carbon. To do so, a combinatorial sputtering technique was used to simultaneously prepare many different compositions of Sn-TM-based materials. The structural and electrochemical results of these samples are presented and they show that cobalt is the preferred TM to give optimal performance. Finally, a comparison of a Sn-Co-C negative electrode material prepared by a rapid quenching method (sputtering) with a material prepared by an economical milling method (mechanical attrition) is presented and discussed.

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Section: Preparation Of Sn-co-c By Mechanical Millingmentioning

confidence: 99%

Tin-based materials as negative electrodes for Li-ion batteries: Combinatorial approaches and mechanical methods

Todd

Ferguson

Fleischauer

et al. 2010

Int. J. Energy Res.

141

106

View full text Add to dashboard Cite

show abstract

“…However, slight changes in the hyperfine parameters were allowed in order to achieve a good fitting (Table 1). Recently, it has been demonstrated that the presence of carbon atoms cause an increase in the isomer shift value of the spectrum barycentre as compared with pure tin-cobalt compounds [25]. The quantification of the tin atomic fractions is proportional to the relative contribution to the MS spectrum and the recoil-free fraction.…”

Section: Resultsmentioning

confidence: 99%

A facile carbothermal preparation of Sn–Co–C composite electrodes for Li-ion batteries using low-cost carbons

Nacimiento

Lavela

Tirado

et al. 2011

J Solid State Electrochem

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Sn-Co-C composites were prepared by carbothermal reaction of ball-milled precursors. X-ray diffraction and 119 Sn Mössbauer spectroscopy of the original composites revealed the predominance of Sn and CoSn 2 phases for those samples prepared with a high Sn/Co ratio. Electron microscopy images showed a homogeneous dispersion of sub-micrometric metallic particles in the carbon matrix. Galvanostatic cycling at several kinetic rates revealed that Sn 7 Co 1 C 92 and Sn 8 Co 4 C 88 are able to maintain 400 mA h g −1 after 40 cycles at 35 mA g −1 . The large CoSn 2 contribution revealed by Mössbauer spectroscopy in the original and cycled electrodes is responsible for the good electrochemical performance. This interpretation is also supported by impedance spectroscopy measurements.

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“…The addition of cobalt atoms to the tin phase involves that the average isomer shift is moved to lower values between δ = 2.56 for β-Sn and δ = 1.91 mm/s for hexagonal CoSn. Since the electron density at the 5s-orbital of the tin atom decreases as a consequence of the electron transfer of the tin valence electrons to the conduction band of the cobalt-tin alloy [3,5], the value of the intermetallic compound isomer shift decreases as referred to pure tin. In addition, as the melting point of cobalt-tin compounds is higher than the melting point of pure tin, the relative absorption of the 119 Sn Mössbauer spectra and the recoil-free fraction tend (6) and δ = 2.03(1) mm/s which agrees well with previously reported results [5].…”

Section: Resultsmentioning

confidence: 99%

“…Coarse grained cobalt-tin powdered compounds were prepared by annealing a mixture of cobalt and tin in the desired atomic ratio at an adequate temperature under Ar-flow [3]. A sample henceforth refereed to as nano-CoSn was prepared by following a procedure based on a low-temperature one-pot method [4].…”

Section: Methodsmentioning

confidence: 99%

“…Intermetallic materials are envisaged as a promising alternative to carbon materials for the negative electrode in lithium ion batteries [1][2][3]. These intermetallic materials can be formed by Li-alloying elements and by Li-non-alloying elements, and their crystallinity and particle size are relevant properties that influence on the electrochemical behavior.…”

Section: Introductionmentioning

confidence: 99%

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119Sn Mössbauer spectroscopy: a powerful tool to unfold the reaction mechanism in advanced electrodes for lithium-ion batteries

et al. 2008

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Cobalt-tin intermetallic compounds with different particle size have been obtained and characterized by using 119 Sn Mössbauer spectroscopy as a main tool. The electrochemical behavior of the Co-Sn compounds has been evaluated in lithium test cells. The Lamb-Mössbauer factors for CoSn with different crystallite sizes have been calculated. The results f nano−CoSn (300 K) = 0.19 and f coarse−CoSn (300 K) = 0.55 are obtained. Nano-CoSn exhibits larger capacity to react with lithium than coarse-CoSn.

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New tin-based materials containing cobalt and carbon for lithium-ion batteries

Cited by 55 publications

References 25 publications

Tin-based materials as negative electrodes for Li-ion batteries: Combinatorial approaches and mechanical methods

Tin-based materials as negative electrodes for Li-ion batteries: Combinatorial approaches and mechanical methods

A facile carbothermal preparation of Sn–Co–C composite electrodes for Li-ion batteries using low-cost carbons

119Sn Mössbauer spectroscopy: a powerful tool to unfold the reaction mechanism in advanced electrodes for lithium-ion batteries

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