Mössbauer effect studies of sputter-deposited tin–cobalt and tin–cobalt–carbon alloys

Todd, A. D. W.; Dunlap, R. A.; Dahn, J. R.

doi:10.1016/j.jallcom.2007.06.030

Cited by 50 publications

(53 citation statements)

References 20 publications

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“…The diffraction pattern appears amorphous with two broad humps at about 32 • and 43 • , corresponding to an amorphous CoSn phase. This diffraction pattern is consistent with the model presented by Todd et al [31] where amorphous CoSn grains are within a disordered carbon matrix. Fig.…”

Section: Electrochemical Characterizationsupporting

confidence: 92%

Lithium polyacrylate as a binder for tin–cobalt–carbon negative electrodes in lithium-ion batteries

Le²,

Ferguson

et al. 2010

Electrochimica Acta

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Section: Electrochemical Characterizationsupporting

confidence: 92%

Lithium polyacrylate as a binder for tin–cobalt–carbon negative electrodes in lithium-ion batteries

Le²,

Ferguson

et al. 2010

Electrochimica Acta

Self Cite

181

121

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“…We believe that the actual size of the Sn-Co grains (grey) in the carbon matrix (black) are on the scale of 1-50 nm and this size depends on the production method used. After Todd et al [37]. …”

Section: Methods Of Formationmentioning

confidence: 98%

“…It was found that although nanostructured Sn-Co-C alloys have large volume expansions, the material is able to expand and contract reversibly for many charge-discharge cycles [35,36]. The Sn-Co-C material was found to contain grains of amorphous Sn-Co in a matrix of carbon, allowing the amorphous Sn-Co grains to expand and contract homogeneously with the carbon matrix inhibiting the aggregation of tin [17,37]. The choice of cobalt as the TM element in the Sn-TM-C alloy was determined by the fact that only Sn-V, Sn-Ti and Sn-Co binary systems contain nanostructured composition ranges and that there are carbides that exist with TM 5 V and Ti, causing those alloys to structurally rearrange as lithium is inserted and removed [36].…”

Section: Negative Electrodes For Li-ion Batteries 545mentioning

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.

144

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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“…Since the initial report, there have been a number of studies of Sn-Co and Sn-Co-C materials. TEM studies by Fan et al [2] on Sony's Sn-Co-C electrode material and Sn Mössbauer effect spectroscopy studies by Todd et al [3] on sputtered (Sn 0.63 Co 0.37 ) 1−x C x show that these materials are best represented by nanometer-sized grains of Sn-Co separated by a carbon matrix. Studies of the electrochemical properties of such materials have been reported in Refs.…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing on nanostructured Sn30Co30C40 prepared by mechanical attrition

Thorne

Ferguson

Dunlap

et al. 2009

Journal of Alloys and Compounds

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Mössbauer effect studies of sputter-deposited tin–cobalt and tin–cobalt–carbon alloys

Cited by 50 publications

References 20 publications

Lithium polyacrylate as a binder for tin–cobalt–carbon negative electrodes in lithium-ion batteries

Lithium polyacrylate as a binder for tin–cobalt–carbon negative electrodes in lithium-ion batteries

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

Effect of annealing on nanostructured Sn30Co30C40 prepared by mechanical attrition

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