The effect of copper coating on nanocolumnar silicon anodes for lithium ion batteries

Polat, Burak; Keleş, Özgül

doi:10.1016/j.tsf.2015.06.038

Cited by 17 publications

(20 citation statements)

References 36 publications

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“…A high overall capacity of 1500 mAh g −1 can be obtained with the 80 at% Si–20 at% Ti film, and capacity retention is 94.8% after 50 cycles at a specific current of 100 mA g −1 and close to 100% after 300 cycles at a specific current of 2000 mA g −1 . Furthermore, it is demonstrated that the first Coulombic efficiency of 80 at% Si–20 at% Ti film is up to 94.8%, which is one of the best among reported Si‐based negative electrodes . Full cells with Si–Ti thin films as the anodes and LiFePO 4 cathodes show excellent cycling stability with high Coulombic efficiency.…”

Section: Introductionmentioning

confidence: 93%

“…[17][18][19][20] For example, 83% capacity retention after 100 cycles was reported in copper-silicon cosputtered system. [21] Even though the incorporations of additional elements lead to better cycling performance, [21][22][23][24][25][26][27] complete understanding of the mechanisms by which the incorporated metals interact with Si during lithiation and delithiation is lacking. In particular, the effect of the alloy on the expansion of Si electrode during lithiation and delithiation is not studied in detail.…”

Section: Lithium-ion Batteriesmentioning

confidence: 99%

“…Furthermore, it is demonstrated that the first Coulombic efficiency of 80 at% Si-20 at% Ti film is up to 94.8%, which is one of the best among reported Si-based negative electrodes. [21][22][23][24][25]28] Full cells with Si-Ti thin films as the anodes and LiFePO 4 cathodes show excellent cycling stability with high Coulombic efficiency. When Si-Ti is coupled with LiCoO 2 , a stack energy density of as high as 915 Wh L −1 can be obtained, calculated based on method described by Obrovac and Chevrier (Equation (2)).…”

Section: Lithium-ion Batteriesmentioning

confidence: 99%

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Leveraging Titanium to Enable Silicon Anodes in Lithium‐Ion Batteries

Lee

Tahmasebi

Ran

et al. 2018

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Silicon is a promising anode material for lithium‐ion batteries because of its high gravimetric/volumetric capacities and low lithiation/delithiation voltages. However, it suffers from poor cycling stability due to drastic volume expansion (>300%) when it alloys with lithium, leading to structural disintegration upon lithium removal. Here, it is demonstrated that titanium atoms inside the silicon matrix can act as an atomic binding agent to hold the silicon atoms together during lithiation and mend the structure after delithiation. Direct evidence from in situ dilatometry of cosputtered silicon–titanium thin films reveals significantly smaller electrode thickness change during lithiation, compared to a pure silicon thin film. In addition, the thickness change is fully reversible with lithium extraction, and ex situ post‐mortem microscopy shows that film cracking is suppressed. Furthermore, Raman spectroscopy measurements indicate that the Si–Ti interaction remains intact after cycling. Optimized Si–Ti thin films can deliver a stable capacity of 1000 mAh g−1 at a current of 2000 mA g−1 for more than 300 cycles, demonstrating the effectiveness of titanium in stabilizing the material structure. A full cell with a Si–Ti anode and LiFePO4 cathode is demonstrated, which further validates the readiness of the technology.

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Section: Introductionmentioning

confidence: 93%

Section: Lithium-ion Batteriesmentioning

confidence: 99%

Section: Lithium-ion Batteriesmentioning

confidence: 99%

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Leveraging Titanium to Enable Silicon Anodes in Lithium‐Ion Batteries

Lee

Tahmasebi

Ran

et al. 2018

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“…Due to the non-toxicity, stable thermal and mechanical structure, abundance and electrical conductivity, graphite becomes the most commonly used anode material in commercial LIBs. [11,[99][100][101][102][103][104][105][106] Further experiment about Graphene/Cu 6 Sn 5 nanocomposite was done by Chen et al They successfully prepared the Graphene/Cu 6 Sn 5 nanocomposite through a facile one-pot method. [107] Cu 6 Sn 5 nanoparticles which the average size is below 10 nm are encapsulated into graphene nanosheets.…”

Section: Copper Alloy Directed As Anodementioning

confidence: 99%

“…Anodes (modified carbons are widely adopted) generally have higher capacities than common cathodes. [99] The team also has successfully synthesized core-shell Cu@Cu 6 Sn 5 nanowires. [98] They used anodized Cu(OH) 2 nanorods as the substrate and an electrodeposition process to heel by the 3D technology.…”

Section: Wwwparticle-journalcom Wwwmaterialsviewscommentioning

confidence: 99%

Copper-Based Nanomaterials for High-Performance Lithium-Ion Batteries

Zhang

et al. 2016

Part. Part. Syst. Charact.

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With the increasing energy demands for electronic devices and electrical vehicles, anode materials for lithium‐ion batteries with high specific capacity, good cyclic and rate performance become one of the focal areas of research. A class of them is the copper‐based nanomaterials that have thermal and chemical stability, high theoretical specific capacity, low price and environment friendliness. Now this kind of nanomaterials has been recognized as one of the critical materials for lithium‐ion batteries due to the predicted future market growth. Current status of different copper‐based materials which produced already are discussed. In this review, comprehensive summaries and evaluations are given in synthesis strategies, tailored material properties and different electrochemical performance. Recent progress of general copper‐based nanomaterials for lithium‐ion batteries is carefully presented.

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