Silicon-Copper Helical Arrays for New Generation Lithium Ion Batteries

Polat, Burak; Keleş, Özgül; Amine, Khalil

doi:10.1021/acs.nanolett.5b02522

Cited by 33 publications

(25 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The amorphous nature of the Si and the Si‐alloys is further confirmed with XRD after detaching the electrode materials from the Cu current collector, showing only a hump at 20°–40° from the glass sample holder (Figure S2, Supporting Information). The structure of the film may be beneficial for battery applications, as less Li‐ion is trapped in the amorphous Si (a‐Si) compared to crystalline Si (c‐Si) during the first lithiation step, leading to higher first cycle efficiency …”

Section: Resultsmentioning

confidence: 99%

“…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%

“…The structure of the film may be beneficial for battery applications, as less Li-ion is trapped in the amorphous Si (a-Si) compared to crystalline Si (c-Si) during the first lithiation step, leading to higher first cycle efficiency. [21,22] Small 2018, 14,1802051 Raman spectroscopy was used to give further insight into the structure of the Si-Ti electrodes (Figure 2b). The Raman spectrum of 100 at% Si thin film shows peaks at 480 and 900 cm −1 , which can be ascribed to the first-and second-order transverse optical (TO) mode of amorphous-Si (a-Si).…”

Section: Morphological and Stoichiometric Characterization Of As-depomentioning

confidence: 99%

See 4 more Smart Citations

Leveraging Titanium to Enable Silicon Anodes in Lithium‐Ion Batteries

Lee

Tahmasebi

Ran

et al. 2018

Small

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Lithium-ion Batteriesmentioning

confidence: 99%

Section: Lithium-ion Batteriesmentioning

confidence: 99%

Section: Morphological and Stoichiometric Characterization Of As-depomentioning

confidence: 99%

See 3 more Smart Citations

Leveraging Titanium to Enable Silicon Anodes in Lithium‐Ion Batteries

Lee

Tahmasebi

Ran

et al. 2018

Small

View full text Add to dashboard Cite

show abstract

Rational Design of Core‐Shell ZnTe@N‐Doped Carbon Nanowires for High Gravimetric and Volumetric Alkali Metal Ion Storage

Zhang

Qiu

Zheng

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Among the various semiconductor materials, zinc telluride possesses the lowest electron affinity and ultrafast charge separation capability, facilitating improved charge transfer kinetics. In addition, ZnTe has a relatively high density, contributing to high volumetric capacity. Here, 1D N-doped carbon-coated ZnTe core-shell nanowires (ZnTe@C) are designed and prepared via a facile ion-exchange and carbonization technique. When evaluated as anode for metal ion batteries, it demonstrates superior electrochemical performance in both Li and Na ion storage, including high gravimetric and volumetric capacities (1119 mA h g −1 and 906 mA h cm −3 , respectively, at 100 mA g −1 for Li ion storage), excellent high-rate capability, and long-term cycling stability. This remarkable electrochemical performance is attributed to the low electron affinity and high density of ZnTe, and the amorphous nature of the N-doped carbon layer in the heterostructured ZnTe@C nanowires, which not only provide fast charge transfer paths, but also effectively maintain the structural and electrical integrity of the ZnTe. The strategy of embedding high density and highperformance active materials in highly conductive nanostructures represents an effective way of achieving electrode materials with excellent gravimetric and volumetric capacities towards superior energy storage systems.

show abstract

Nanoarchitectured Array Electrodes for Rechargeable Lithium‐ and Sodium‐Ion Batteries

Zhou

Lei

2016

Advanced Energy Materials

180

107

View full text Add to dashboard Cite

Among the various available EES technologies, lithium-ion batteries (LIBs) are certainly a contender because of the much higher energy stored per unit weight or volume compared to other conventional batteries (lead-acid, nickel-hydride, redoxfl ow, and high-temperature batteries). The higher energy density comes from the higher cell voltage (3-5 V, Figure 1 ) due to the use of non-aqueous electrolytes along with higher capacity values (up to 4000 mAh g −1 ) compared to aqueous electrolyte-based battery systems (< 2 V). [ 2,3 ] Since the fi rst commercial launch by Sony, LIBs have conquered the market of portable electronics during the past two decades. They are now being intensively pursued for transportation applications, including hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and electric vehicles (EV). The representative EV model is Model S (Tesla Motor) that employs LIBs to realize all-wheel drive with dual motors, reaching a maximum driving range of 270 miles and possessing an environment-friendly feature of zero emissions. LIBs are also being seriously considered for the effi cient storage and utilization of intermittent renewable energies due to the rising demands for power storage units that supplement irregular power generation and consumption patterns, and also realize the future power network system, such as the Smart Grid. LIBs with good capabilities and rapid response properties are appropriate for smoothing short time power variations through frequency regulation. [ 4 ] The market is at its initial stage and worth approximately 2 billion dollars, but is expected to grow explosively up to 35 billion dollars by 2020 with an expansion of renewable energy supplies and the Smart Grid system. [ 5 ] However, concerns over potentially rising costs and the availability of global lithium resources have been arisen because of the fact that most easily accessible lithium reserves are in remote or politically sensitive areas. [6][7][8] The foreseeable price rise of lithium compounds will make EES technologies based on LIBs less affordable. Recently, rapidly growing attention has shifted to sodium-ion batteries (SIBs) due to the cost effectiveness and geographical distribution of sodium. Theoretically speaking, SIBs may not reach the energy density of that of LIBs because Na is three times heavier than Li. But given its suitable potential of −2.71 V (vs SHE), which is only 0.3 V more positive than that of Li, there is only a small energy penalty to pay, meaning that SIBs could fi nd their more suitable application in the presence of a large grid support where the operational cost Rechargeable ion batteries have contributed immensely to shaping the modern world and been seriously considered for the effi cient storage and utilization of intermittent renewable energies. To fulfi ll their potential in the future market, superior battery performance of high capacity, great rate capability, and long lifespan is undoubtedly required. In the past decade, along with discovering new electrode mat...

show abstract

Silicon-Copper Helical Arrays for New Generation Lithium Ion Batteries

Cited by 33 publications

References 31 publications

Leveraging Titanium to Enable Silicon Anodes in Lithium‐Ion Batteries

Leveraging Titanium to Enable Silicon Anodes in Lithium‐Ion Batteries

Rational Design of Core‐Shell ZnTe@N‐Doped Carbon Nanowires for High Gravimetric and Volumetric Alkali Metal Ion Storage

Nanoarchitectured Array Electrodes for Rechargeable Lithium‐ and Sodium‐Ion Batteries

Contact Info

Product

Resources

About