Anomalous capacity increase at high-rates in lithium-ion battery anodes based on silicon-coated vertically aligned carbon nanofibers

Klankowski, Steven A.; Pandey, Gaind P.; Cruden, Brett A.; Liu, Jianwei; Wu, Judy; Rojeski, Ronald A.; Li, Jun

doi:10.1016/j.jpowsour.2014.11.094

Cited by 31 publications

(42 citation statements)

References 42 publications

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“…TEM images (Figs. 1g and S1c) reveal that these features are identical to those in our previous studies [26,27].…”

Section: Full Cell Design and Structure Of Electrode Materialssupporting

confidence: 87%

“…An ultra-high capacity of ~3,000 to 3,500 mAh g -1 (relative to Si mass) was obtained at low to normal power rates, from C/10 to C/0.5 (or 2C), matching the theoretical properties of amorphous Si [27]. More importantly, this value was maintained around ~3,000 mAh g -1 at high rates up to ~8C [26]. This unique anode is used here to match a TiO 2 cathode for assessing the power performance at high charge-discharge rates comparable to those used in supercapacitors.…”

Section: Introductionmentioning

confidence: 63%

“…The general procedures for growing VACNFs on copper foils have been described in previous publications [26,27]. The VACNFs for this work were grown by plasma enhanced chemical vapor deposition (PECVD) for 30 minutes to achieve an average length of 5.0 µm using a Black Magic system (Aixtron, Sunnyvale, CA, USA).…”

Section: Electrodes Fabricationmentioning

confidence: 99%

“…The path length of slow chemical diffusion of Li + within the solid materials is reduced to ~ 10 nm (the radius of the nanocolumns). Such a unique multiscale integrated porous core-shell structure is the key for high-power and high-stability performance [26,27].…”

Section: Full Cell Design and Structure Of Electrode Materialsmentioning

confidence: 99%

“…Hybrid core-shell structures utilizing highly conductive nanotubes as the stable cores to support thin Si shells have further demonstrated the ability for providing high specific capacity and good cycle stability around the normal C-rates of C/1 (namely completing the charge/discharge process in 1 hr) [19][20][21][22][23][24][25]. Recently, we have demonstrated the use of a coreshell structure composed of co-axial Si shells deposited on a forest-like array of vertically aligned carbon nanofiber (VACNFs) [26,27]. An ultra-high capacity of ~3,000 to 3,500 mAh g -1 (relative to Si mass) was obtained at low to normal power rates, from C/10 to C/0.5 (or 2C), matching the theoretical properties of amorphous Si [27].…”

Section: Introductionmentioning

confidence: 99%

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A Novel High-Power Battery-Pseudocapacitor Hybrid Based on Fast Lithium Reactions in Silicon Anode and Titanium Dioxide Cathode Coated on Vertically Aligned Carbon Nanofibers

Klankowski

Pandey

Malek

et al. 2015

Electrochimica Acta

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“…TEM images (Figs. 1g and S1c) reveal that these features are identical to those in our previous studies [26,27].…”

Section: Full Cell Design and Structure Of Electrode Materialssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 63%

Section: Electrodes Fabricationmentioning

confidence: 99%

Section: Full Cell Design and Structure Of Electrode Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Novel High-Power Battery-Pseudocapacitor Hybrid Based on Fast Lithium Reactions in Silicon Anode and Titanium Dioxide Cathode Coated on Vertically Aligned Carbon Nanofibers

Klankowski

Pandey

Malek

et al. 2015

Electrochimica Acta

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Highly Stable Three Lithium Insertion in Thin V₂O₅ Shells on Vertically Aligned Carbon Nanofiber Arrays for Ultrahigh‐Capacity Lithium Ion Battery Cathodes

Brown

Acharya

Pandey

et al. 2016

Adv Materials Inter

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factor limiting the energy storage capability of LIBs. [5] For example, in the most common commercial LIBs, a near theoretical specific capacity of 372 mAh g −1 can be achieved with the graphite anode while only ≈140 mAh g −1 specific capacity with LiCoO 2 cathode. [5] Hence, the current LIB research has put an extensive emphasis on improving the charge storage capacity and power delivery capability of the cathode materials. [6,7] Vanadium pentoxide (V 2 O 5 ) is regarded as a promising cathode material owing to its high theoretical capacity due to multiple Li + insertion/extraction reactions in addition to the low cost, nontoxic chemical properties, high electrode potential in lithium-extracted state (up to 4.0 V), and easily accessible layered structure for Li + ion insertion. [8] Theoretically, crystalline V 2 O 5 can achieve a reversible specific capacity of 294 mAh g −1 (for a two Li + / V 2 O 5 insertion process) and an irreversible capacity of 441 mAh g −1 (for a 3 Li + /V 2 O 5 insertion process), [9] which are significantly higher than today's commercial cathode materials such as LiCoO 2 (140 mAh g −1 ), LiMn 2 O 4 (148 mAh g −1 ), and LiFePO 4 (170 mAh g −1 ) [10] that are limited to only one Li + insertion/extraction. A few reports have even suggested that amorphous V 2 O 5 in supercritically dried xerogels and aerogels can achieve extremely high capacities up to 560 and 650 mAh g −1 , respectively (equivalent to 4 and 5.8 Li + insertion/extraction per V 2 O 5 ), owing to their highly porous network, high surface area, and short Li + diffusion paths. [11,12] Unfortunately, these materials suffer from poor mechanical/ chemical stability and rapid capacity fading, making it difficult to realize the predicted high capacity in practical LIBs.Achieving reliable capacity with V 2 O 5 cathodes close to the theoretical value has been a challenge due to the small Li + ion diffusion coefficients (≈10 −15 to 10 −12 cm 2 s −1 ) and low electrical conductivities (≈10 −3 to 10 −5 S cm −1 ) in this material, which ultimately hinder the performance of V 2 O 5 cathodes in practical EES devices. [13,14] Also, it is well known that the Li + intercalation process in crystalline V 2 O 5 is accompanied by multiple phase transitions. Trace amounts of Li + intercalation result in α-Li x V 2 O 5 (x < 0.01) structure, which is transformed into ε-Li x V 2 O 5 (0.35 < x < 0.7) after further lithiation. Insertion of exactly one Li + leads to the formation of δ-phase Li x V 2 O 5 (x = 1). Further lithiation converts the δ-phase to γ-Li x V 2 O 5 (1 < x < 2).Here the authors demonstrate an approach to achieving stable 3 Li + insertion into vanadium pentoxide (V 2 O 5 ) by implementing a 3D core-shell structure consisting of coaxial V 2 O 5 shells sputter-coated on vertically aligned carbon nanofiber cores. The hydrated amorphous microporous structure in the "asdeposited" V 2 O 5 shells and the particulated nanocrystalline V 2 O 5 structure formed by thermal annealing are compared. The former provides remarkably high capacities of 36...

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Improving the Performance of SiO_x/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite

et al. 2020

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Silicon is recognized as the most promising anode material for the next-generation battery. In order to improve the processing and electrochemical performances, a silicon-based anode composite was synthesized using silicon, montmorillonite and carboxymethylcellulose (CMC) as raw materials. The processing parameters, such as particle size and specific surface area, were ameliorated to be consistent with those of commercial lithium-ion battery (LIB) anode materials. As an anode composite, it perfectly matched with high nickel ternary cathode materials and showed excellent electrochemical properties. The discharge capacities were all above 1000 mAh/g and the coulombic efficiency of each step was over 99 % throughout the 50 cycles at 1 C (1100 mA/g). Its superior performances are attributed to the unique layered structure, which buffers the volume expansion and enhances the stability of the solid electrolyte interface (SEI) film on the anodic electrode, suggesting a perspective future in designing high energy density commercial LIBs.

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Anomalous capacity increase at high-rates in lithium-ion battery anodes based on silicon-coated vertically aligned carbon nanofibers

Cited by 31 publications

References 42 publications

A Novel High-Power Battery-Pseudocapacitor Hybrid Based on Fast Lithium Reactions in Silicon Anode and Titanium Dioxide Cathode Coated on Vertically Aligned Carbon Nanofibers

A Novel High-Power Battery-Pseudocapacitor Hybrid Based on Fast Lithium Reactions in Silicon Anode and Titanium Dioxide Cathode Coated on Vertically Aligned Carbon Nanofibers

Highly Stable Three Lithium Insertion in Thin V₂O₅ Shells on Vertically Aligned Carbon Nanofiber Arrays for Ultrahigh‐Capacity Lithium Ion Battery Cathodes

Improving the Performance of SiO_x/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite

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Anomalous capacity increase at high-rates in lithium-ion battery anodes based on silicon-coated vertically aligned carbon nanofibers

Cited by 31 publications

References 42 publications

A Novel High-Power Battery-Pseudocapacitor Hybrid Based on Fast Lithium Reactions in Silicon Anode and Titanium Dioxide Cathode Coated on Vertically Aligned Carbon Nanofibers

A Novel High-Power Battery-Pseudocapacitor Hybrid Based on Fast Lithium Reactions in Silicon Anode and Titanium Dioxide Cathode Coated on Vertically Aligned Carbon Nanofibers

Highly Stable Three Lithium Insertion in Thin V2O5 Shells on Vertically Aligned Carbon Nanofiber Arrays for Ultrahigh‐Capacity Lithium Ion Battery Cathodes

Improving the Performance of SiOx/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite

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Product

Resources

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Highly Stable Three Lithium Insertion in Thin V₂O₅ Shells on Vertically Aligned Carbon Nanofiber Arrays for Ultrahigh‐Capacity Lithium Ion Battery Cathodes

Improving the Performance of SiO_x/Carbon Materials for High Energy Density Commercial Lithium‐Ion Batteries Based on Montmorillonite