Aligned Carbon Nanotube‐Silicon Sheets: A Novel Nano‐architecture for Flexible Lithium Ion Battery Electrodes

Fu, Kun; Yıldız, Özkan; Bhanushali, Hardik; Wang, Yongxin; Stano, Kelly L.; Xue, Leigang; Zhang, Xiangwu; Bradford, Philip D.

doi:10.1002/adma.201301920

Cited by 235 publications

(183 citation statements)

References 42 publications

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“…The nominal resin content was in the range from 27.0% to 33.0% as specified by the manufacturer. The drawable CNT arrays used in this investigation were synthesized in house using the low pressure chemical vapor deposition route based on the method described in [40] and detailed in previous work [41]. The arrays used in this work were approximately 100 × 50 × 1.5 mm.…”

Section: Methodsmentioning

confidence: 99%

Woven Glass Fiber Composites with Aligned Carbon Nanotube Sheet Interlayers

Bhanushali

Bradford

2016

Journal of Nanomaterials

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This investigation describes the design, fabrication, and testing of woven glass fiber reinforced epoxy matrix laminates with aligned CNT sheets integrated between plies in order to improve the matrix dominated through thickness properties such as the interlaminar fracture toughness at ply interfaces. Using aligned CNT sheets allows for a concentration of millimeter long CNTs at the most likely point of laminate failure. Mode I and Mode II interlaminar fracture toughness of various CNT modified samples were investigated using double cantilever beam (DCB) and end notched flexure (ENF) experiments, respectively. Short beam strength (SBS) and in-plane tensile properties of the CNT modified samples were also investigated. Moderate improvement was observed in Mode I and Mode II fracture toughness at crack initiation when aligned CNT sheets with a basis weight of 0.354 g/m 2 were used to modify the ply interface. No compromise in the in-plane mechanical properties of the laminate was observed and very little improvement was observed in the shear related short beam strength of the CNT modified laminates as compared to the control samples. Integration of aligned CNT sheets into the composite laminate imparted in-plane and through thickness electrical properties into the nonconductive glass fiber reinforced epoxy composite laminates.

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Section: Methodsmentioning

confidence: 99%

Woven Glass Fiber Composites with Aligned Carbon Nanotube Sheet Interlayers

Bhanushali

Bradford

2016

Journal of Nanomaterials

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“…[1][2][3][4][5] The exceptional properties of CNTs and related materials have triggered tremendous efforts not only to study their intrinsic properties but also to explore their applications in a large variety of fi elds. [6][7][8][9][10][11][12][13] These high-aspect-ratio 3D structures play an important role in the advancement of vertical interconnect technology, [14][15][16][17] fl exible batteries, [ 3 ] stamps for micro/nanoimprint lithography, [ 2,[18][19][20][21] compliant thermal interface materials for low inter-facial resistances, [22][23][24][25] 3D super-capacitors [ 26,27 ] and nano/micro-electromechanical systems (NEMS) and (MEMS). [ 1,[28][29][30] The CNT arrays that we refer to in this work are composed of nominally vertical, interwoven, multi-wall carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

“…A literature overview of coated nanoscale architectures discusses the inherent link between nanoscale morphology and properties. [ 36 ] Recent and remarkable examples of conformally coated CNT arrays include e.g., deposition of silicon coatings to create a fl exible anode architecture for high-energy-density-batteries [ 3 ] and graphene coatings to create superelastic, lightweight and fatigue resistant aerogels. [ 7 ] Silicon carbide (SiC) also proves to be an interesting coating material, mainly due to its diamond like characteristics.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Mechanical Properties of High‐Aspect‐Ratio Carbon Nanotube Arrays using Amorphous Silicon Carbide Coatings

Poelma

Morana

Vollebregt

et al. 2014

Adv Funct Materials

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The porous nature of carbon nanotube (CNT) arrays allows for the unique opportunity to tailor their mechanical response by the infiltration and deposition of nano-scale conformal coatings. Here, we fabricate novel photo-lithographically defined CNT pillars that are conformally coated with amorphous silicon carbide (a-SiC) to strengthen the interlocking of individual CNTs at junctions using low pressure chemical vapour deposition (LPCVD). We further quantify the mechanical response by performing flat-punch nanoindentation measurements on coated CNT pillars with various high-aspect-ratios. We discovered new mechanical failure modes of coated CNT pillars, such as "bamboo" and brittle-like composite rupture as coating thickness increases. Furthermore, a significant increase in strength and modulus is achieved. For CNT pillars with high aspect ratio (1:10) and coating thickness of 21.4 nm, the compressive strength increases by an order of magnitude of 3, towards 1.8 GPa (from below 1 MPa for uncoated CNT pillars) and the elastic modulus increases towards 125 GPa. These results show that our coated CNT pillars, which can serve as vertical interconnects and 3D super-capacitors, can be transformed into robust high-aspectratio 3D-micro architectures with semiconductor device compatible processes.

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“…Composites with SWCNTs, such as Si/SWCNT [12,13], Fe 2 O 3 /SWCNT [14,15], SnO 2 /SWCNT [16], and MnO x /SWCNT [17] have been reported as paper anode materials. Although good electrochemical performances achieved by these already studied composite paper anodes were attractive, most of the preparation routes are too complicated or require high reaction temperature, limiting their industrial implementation.…”

Section: Introductionmentioning

confidence: 99%

A germanium/single-walled carbon nanotube composite paper as a free-standing anode for lithium-ion batteries

Wang

Sun

et al. 2014

J. Mater. Chem. A

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Paper-like free-standing germanium (Ge) and single-walled carbon nanotube (SWCNT) composite anodes were synthesized by the vacuum filtration of Ge/SWCNT composites, which were prepared by a facile aqueous-based method. The samples were characterized by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. Electrochemical measurements demonstrate that the Ge/ SWCNT composite paper anode with the weight percentage of 32% Ge delivered a specific discharge capacity of 417 mA h g−1 after 40 cycles at a current density of 25 mA g−1, 117% higher than the pure SWCNT paper anode. The SWCNTs not only function as a flexible mechanical support for strain release, but also provide excellent electrically conducting channels, while the nanosized Ge particles contribute to improving the discharge capacity of the paper anode. Paper-like free-standing germanium (Ge) and single-walled carbon nanotube (SWCNT) composite anodes were synthesized by the vacuum filtration of Ge/SWCNT composites, which were prepared by a facile aqueous-based method. The samples were characterized by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. Electrochemical measurements demonstrate that the Ge/SWCNT composite paper anode with the weight percentage of 32% Ge delivered a specific discharge capacity of 417 mAh g -1 after 40 cycles at a current density of 25 mA g -1 , 117% higher than the pure SWCNT paper anode. The SWCNTs not only function as a flexible mechanical support for strain release, but also provide excellent electrically conducting channels, while the nanosized Ge contributes to improving the discharge capacity of the paper anode.

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Aligned Carbon Nanotube‐Silicon Sheets: A Novel Nano‐architecture for Flexible Lithium Ion Battery Electrodes

Cited by 235 publications

References 42 publications

Woven Glass Fiber Composites with Aligned Carbon Nanotube Sheet Interlayers

Woven Glass Fiber Composites with Aligned Carbon Nanotube Sheet Interlayers

Tailoring the Mechanical Properties of High‐Aspect‐Ratio Carbon Nanotube Arrays using Amorphous Silicon Carbide Coatings

A germanium/single-walled carbon nanotube composite paper as a free-standing anode for lithium-ion batteries

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