Amorphous silicon–carbon based nano-scale thin film anode materials for lithium ion batteries

Datta, Moni Kanchan; Maranchi, Jeffrey P.; Chung, Sung Jae; Epur, Rigved; Kadakia, Karan; Jampani, Prashanth H.; Kumta, Prashant N.

doi:10.1016/j.electacta.2011.01.124

Cited by 132 publications

(97 citation statements)

References 30 publications

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“…Hence, the pulse electrodeposited Si electrodes were directly assembled in a 2025 coin cell without addition of any binder or Super P and tested with lithium as counter/reference electrode in the voltage window of 0.01-1.2 V. A significant peak is observed close to~0.15 V during the first discharge cycle in the differential capacity plot (Figure 3a) indicating the alloying reaction of lithium with a-Si and presence of partially alloyed (a-Li y Si) and unalloyed (a-Si) two phase region as reported in the literature [52][53][54]. The presence of a potential peak at~0.08 V indicates various stages of alloying reactions and complete formation of a-Li x Si during the end of the first discharge cycle.…”

Section: Electrochemical Characterization Of Pedsi On Cumentioning

confidence: 86%

Pulsed Current Electrodeposition of Silicon Thin Films Anodes for Lithium Ion Battery Applications

et al. 2017

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Electrodeposition of amorphous silicon thin films on Cu substrate from organic ionic electrolyte using pulsed electrodeposition conditions has been studied. Scanning electron microscopy analysis shows a drastic change in the morphology of these electrodeposited silicon thin films at different frequencies of 0, 500, 1000, and 5000 Hz studied due to the change in nucleation and the growth mechanisms. These electrodeposited films, when tested in a lithium ion battery configuration, showed improvement in stability and performance with an increase in pulse current frequency during deposition. XPS analysis showed variation in the content of Si and oxygen with the change in frequency of deposition and with the change in depth of these thin films. The presence of oxygen largely due to electrolyte decomposition during Si electrodeposition and the structural instability of these films during the first discharge-charge cycle are the primary reasons contributing to the first cycle irreversible (FIR) loss observed in the pulse electrodeposited Si-O-C thin films. Nevertheless, the silicon thin films electrodeposited at a pulse current frequency of 5000 Hz show a stable capacity of~805 mAh·g −1 with a fade in capacity of~0.056% capacity loss per cycle (a total loss of capacitỹ 246 mAh·g −1 ) at the end of 500 cycles.

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Section: Electrochemical Characterization Of Pedsi On Cumentioning

confidence: 86%

Pulsed Current Electrodeposition of Silicon Thin Films Anodes for Lithium Ion Battery Applications

et al. 2017

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“…5c. After the first cycle, a new broad cathodic peak can be observed at about 0.17 V, and this peak is supposed to be the formation of metastable Li-Si amorphous phases [39,40]. In the anodic half-cycle (delithiation), two oxidation peaks appear at 0.40 and 0.52 V, reflecting a two-step lithium extraction process of Li-Si alloy to Si [41].…”

Section: Electrochemical Performancementioning

confidence: 95%

Deposition of silver nanoparticles into silicon/carbon composite as a high-performance anode material for Li-ion batteries

Hou

Zhang

Wang

et al. 2015

J Solid State Electrochem

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A silicon/silver/carbon (Si/Ag/C) composite with a core-core-shell structure has been synthesized via a simple method based on pyrolysis of an organic carbon source and silver mirror reaction. The Si and Ag nanoparticles are served as cores, while the porous amorphous carbon layer formed from pyrolysis of citric acid is served as shell. The porous amorphous carbon layer and highly conductive Ag nanoparticles can effectively alleviate the volume change of Si nanoparticles during lithiation/delithiation process and provide sufficient electrical conductivity for Si nanoparticles. As an anode material, the obtained Si/Ag/C composite exhibits excellent electrochemical performances, including high initial coulombic efficiency (85.6 % at 200 mA g −1 ), stable cycling performance (a discharge capacity of 2006.3 mA g −1 at 200 mA g −1 after 100 cycles), and excellent rate performance (a discharge capacity of 826.4 mA h g −1 at 3 A g −1 ). This simple method may open up an effective way to make other anode and cathode materials for commercial lithium-ion battery.

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“…Among the various components, the conductive additives and binders on the laminate primarily form the electrochemically inactive components and which add and contribute to the dead weight and volume of the electrode, thereby decreasing the overall specific capacity of the electrode. To overcome this, several 'binder-less' approaches were explored for silicon based anodes, wherein, the active material has been grown directly onto the copper foil using various techniques comprising electrodeposition 17,18 , RF sputtering 19,20 and chemical vapour deposition [11][12][13]21 . For instance, in one of our earlier works, heterostructures of vertically aligned multiwall carbon nanotubes (VACNTs) decorated with silicon droplets were directly grown on Inconel 600 foil to form vertically aligned silicon and carbon nanotube (VASCNTs) composites which were then directly assembled into a coin cell without the use of binders or conductive additives 13 .…”

Section: Introductionmentioning

confidence: 99%

Scribable multi-walled carbon nanotube-silicon nanocomposites: a viable lithium-ion battery system

et al. 2015

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A novel electrode fabrication technique involving a manual scribing action of vertically aligned silicon coated multiwall carbon nanotubes (VASCNTs) on a copper foil have been developed as a viable approach to Li-ion battery electrodes. The scribed electrodes were prepared without the use of any conductive additives and binders, and they were directly assembled in a coin cell. These 'binder-less' scribed Si-CNT electrodes exhibited a very high discharge capacity in excess of 3000 mA h g(-1) and a low first cycle irreversible loss (FIR) (19%). In addition, the electrodes also showed good cyclability with capacity retention of 76% at the end of 50 cycles corresponding to a fade rate of 0.48% loss per cycle rendering the technique attractive for suitable Li-ion applications.

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Amorphous silicon–carbon based nano-scale thin film anode materials for lithium ion batteries

Cited by 132 publications

References 30 publications

Pulsed Current Electrodeposition of Silicon Thin Films Anodes for Lithium Ion Battery Applications

Pulsed Current Electrodeposition of Silicon Thin Films Anodes for Lithium Ion Battery Applications

Deposition of silver nanoparticles into silicon/carbon composite as a high-performance anode material for Li-ion batteries

Scribable multi-walled carbon nanotube-silicon nanocomposites: a viable lithium-ion battery system

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