Multi-layered Cu/Si nanorods and its use for lithium ion batteries

Polat, Burak; Keleş, Özgül

doi:10.1016/j.jallcom.2014.10.028

Cited by 27 publications

(12 citation statements)

References 37 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

Small

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“…In the process of alloying and dealloying of lithium ion with Si, silicon-based materials will cause severe structural damage due to its huge volume effect. Thus, the specific capacity is poor owing to the loss of electrical contact between the cracked and isolated Si particles [8,9]. However, based on the formation of a high lithium intercalation intermetallic compound and the appearance of amorphous phase in the material system, the silicon-based materials have high theoretical specific capacity.…”

Section: In-situ Synthesis Of Si@c Compound Materialsmentioning

confidence: 99%

In-Situ Synthesized Si@C Materials for the Lithium Ion Battery: A Mini Review

Bai

Deng

et al. 2019

Nanomaterials

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As an important component, the anode determines the property and development of lithium ion batteries. The synthetic method and the structure design of the negative electrode materials play decisive roles in improving the property of the thus-assembled batteries. Si@C compound materials have been widely used based on their excellent lithium ion intercalation capacity and cyclic stability, in which the in-situ synthetic method can make full use of the structural advantages of the monomer itself, thus improving the electrochemical performance of the anode material. In this paper, the different preparation technologies and composite structures of Si@C compound materials by in-situ synthesis are introduced. The research progress of Si@C compound materials by in-situ synthesis is reviewed, and the prospect of future development of Si@C compound materials has been tentatively commented.

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“…15 The other well-accepted strategy is introducing an additive material to modify Si. [16][17][18][19][20][21][22][23][24] Generally, carbonaceous materials and metals are considered as favorable additives due to their ne conductivity and strong mechanical properties. For example, Y. Cui et al prepared carbon-silicon core-shell nanowires by depositing Si on carbon nanowires, which delivered a reversible capacity of $2000 mA h g À1 at 0.5 A g À1 for 30 cycles.…”

mentioning

confidence: 99%