2019
DOI: 10.1002/pssa.201900414
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Binary Si–Ge Alloys as High‐Capacity Anodes for Li‐Ion Batteries

Abstract: Herein, Si–Ge binary alloy films are prepared by deposition on rough copper (Cu) foil and multiwalled carbon nanotube (MWCNT) sheets using radio frequency (RF) magnetron sputtering. The as‐prepared SiGe@Cu and SiGe@MWCNT thin films are then characterized by spectroscopy and microscopy techniques. Scanning electron microscopy (SEM) shows that SiGe nanosheets are deposited on the Cu foil, whereas amorphous SiGe spherical nanoparticles are deposited on the MWCNT surface and incorporated inside its pores. Raman an… Show more

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Cited by 13 publications
(13 citation statements)
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“…A comprehensive comparison is thereby made between our proposed anode and previously reported slurry-coated anodes, nanometer-thick film anodes, and ordered nanowire anodes. Both the Ge–Cu (Figure H and Table S2) and Sn–Cu anodes (Table S3) exhibit enhanced electrochemical performance in terms of rate, cycles, and retention. Furthermore, a higher mass loading (2.13 mg cm –2 ) yields improved cycle stability compared to the slurry-coated anodes (approximately 1 mg cm –2 ) and the thin-film/ordered-nanowire anodes (lower than 1 mg cm –2 ). …”
Section: Resultsmentioning
confidence: 99%
“…A comprehensive comparison is thereby made between our proposed anode and previously reported slurry-coated anodes, nanometer-thick film anodes, and ordered nanowire anodes. Both the Ge–Cu (Figure H and Table S2) and Sn–Cu anodes (Table S3) exhibit enhanced electrochemical performance in terms of rate, cycles, and retention. Furthermore, a higher mass loading (2.13 mg cm –2 ) yields improved cycle stability compared to the slurry-coated anodes (approximately 1 mg cm –2 ) and the thin-film/ordered-nanowire anodes (lower than 1 mg cm –2 ). …”
Section: Resultsmentioning
confidence: 99%
“…Therefore, Si-Ge binary systems have received wide attention for their potential use in LIBs. Many methods, such as heating treatment [57], dealloying method [58], radio frequency magnetron sputtering [59], and ball milling [60], have been adopted to prepared Si-Ge alloys. Abel et al [61] systematically studied variations in capacity retention among different Si 1−x Ge x alloys and found that high Ge contents contribute to the high rate performance and cyclability of the alloys at the expense of their specific capacity; the authors attributed this finding to the increased conductivity of the alloys (Fig.…”
Section: Si-ge Systemmentioning
confidence: 99%
“…Si-Ge alloys with various structures have been prepared by combining the concepts of pure nano-Si materials with structural design (Figs. 5(c)-5(h)) [58,[62][63]. Compared with traditional structures, these new structures present special features.…”
Section: Si-ge Systemmentioning
confidence: 99%
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“…Nowadays, commercial LIBs are mainly conformed with graphite as electrode material in the anode, which confers a low theoretical capacity of 372 mAh g −1 [ 16 ]. For this reason, anodes involving alloy reactions, such as Si [ 17 , 18 ], Ge [ 19 ], or Sb [ 20 ], have garnered much attention in particular, considering their theoretical capacities of 3579 mAh g −1 , 1600 mAh g −1 , and 660 mAh g −1 , respectively, for LIBs. Additionally, anodes involving alloy reactions have begun to be used for potassium-ion and sodium-ion batteries (PIBs/ SIBs) with Ge [ 21 ] and Sn [ 22 ].…”
Section: Introductionmentioning
confidence: 99%