Gallium Sulfide–Single‐Walled Carbon Nanotube Composites: High‐Performance Anodes for Lithium‐Ion Batteries

Meng, Xiangbo; He, Kai; Su, Dong; Zhang, Xiaofeng; Sun, Chengjun; Ren, Yang; Wang, Hsien Hau; Weng, Wei; Trahey, Lynn; Canlas, Christian G.; Elam, Jeffrey W.

doi:10.1002/adfm.201401002

Cited by 107 publications

(95 citation statements)

References 38 publications

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“…The pristine SWCNTs characteristics have been detailed in our previous study [33], but some of their salient features are described herein. The SEM image in Fig.…”

Section: Resultsmentioning

confidence: 99%

Tunable core-shell single-walled carbon nanotube-Cu2S networked nanocomposites as high-performance cathodes for lithium-ion batteries

Meng

Riha

Libera

et al. 2015

Journal of Power Sources

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h i g h l i g h t sCu 2 S thin films were prepared by atomic layer deposition. Cu 2 S-single walled carbon nanotube nanocomposites were fabricated. These nanocomposites showed excellent stability as LIB cathodes. >99% Coulombic efficiency and 92% theoretical capacity were achieved over 200 cycles. a b s t r a c tIn this study, nanoscale copper(I) sulfide (n-Cu 2 S) was deposited over networks of single-walled carbon nanotubes (SWCNTs) by atomic layer deposition (ALD). This synthetic route provides a high degree of control for tuning the materials properties. The resulting coreeshell SWCNT-n-Cu 2 S composite structure ensures an intimate contact between the two components while maintaining a high porosity for efficient transport of charges. Indeed, electrochemical testing demonstrates that these nanocomposites are promising as cathodes in lithium-ion batteries (LIBs), exhibiting excellent stability over 200 discharge echarge cycles with a sustainable, high capacity of 260 mAh g À1 (92% of the theoretical value in terms of Cu 2 S) and >99% Coulombic efficiency. This work establishes a general strategy for developing highperformance nanoscale electrode materials.

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“…The pristine SWCNTs characteristics have been detailed in our previous study [33], but some of their salient features are described herein. The SEM image in Fig.…”

Section: Resultsmentioning

confidence: 99%

Tunable core-shell single-walled carbon nanotube-Cu2S networked nanocomposites as high-performance cathodes for lithium-ion batteries

Meng

Riha

Libera

et al. 2015

Journal of Power Sources

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“…Recently, 2D nanomaterials have attracted huge research attention for their use in LiBs due to their exotic properties . As a typical example, the layered metal chalcogenides (MCs) including III–VI/IV–VI layered semiconductors (e.g., GaS, GaSe, InSe, and SnS 2 ) and transition metal dichalcogenides (e.g., MoS 2 , WS 2 , and ReS 2 ) possess higher specific capacities (>550 mAh g −1 ) and larger interlayer spacing compared to graphite, allowing a rapid Li + insertion/extraction process without inducing significant volume changes. Moreover, the weak van der Waals forces among the MC sheets facilitate the production of nanosheet (NS) dispersions via a facile exfoliation strategy .…”

Section: Introductionmentioning

confidence: 99%

Enabling Flexible Heterostructures for Li‐Ion Battery Anodes Based on Nanotube and Liquid‐Phase Exfoliated 2D Gallium Chalcogenide Nanosheet Colloidal Solutions

Zhang

Park

Ronan

et al. 2017

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2D metal chalcogenide (MC) nanosheets (NS) have displayed high capacities as lithium‐ion battery (LiB) anodes. Nevertheless, their complicated synthesis routes coupled with low electronic conductivity greatly limit them as promising LiB electrode material. Here, this work reports a facile single‐walled carbon nanotube (SWCNT) percolating strategy for efficiently maximizing the electrochemical performances of gallium chalcogenide (GaX, X = S or Se). Multiscaled flexible GaX NS/SWCNT heterostructures with abundant voids for Li+ diffusion are fabricated by embedding the liquid‐exfoliated GaX NS matrix within a SWCNT‐percolated network; the latter improves the electron transport and ion diffusion kinetics as well as maintains the mechanical flexibility. Consequently, high capacities (i.e., 838 mAh g−1 per gallium (II) sulfide (GaS) NS/SWCNT mass and 1107 mAh g−1 per GaS mass; the latter is close to the theoretical value) and good rate capabilities are achieved, which can be majorly attributed to the alloying processes of disordered Ga formed after the first irreversible GaX conversion reaction, as monitored by in situ X‐ray diffraction. The presented approach, colloidal solution processing of SWCNT and liquid‐exfoliated MC NS to produce flexible paper‐based electrode, could be generalized for wearable energy storage devices with promising performances.

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“…The short ion diffusion length facilitates the diffusion and the corresponding insertion and extraction of the ions. The active materials fabricated by ALD mainly include metal oxides (e.g., SnO 2 , ZnO, TiO 2 , V 2 O 5 , Co 3 O 4 , Fe 2 O 3 , NiO, MnO x , RuO 2 ), [179][180][181][182][183][184][185][186][187] sulphides (e.g., GaS x ), [188,189] and others (e.g., LiCoO 2 , LiMn 2 O 4 , Li 4 Ti 5 O 12 , FePO 4 , LiFePO 4 ). [178] The short path lengths for ion diffusion permit the application of low Li + conductive materials, high rate performance and high energy densities.…”

Section: Deposition Of Active Filmsmentioning

confidence: 99%

Nanoengineering Energy Conversion and Storage Devices via Atomic Layer Deposition

Wen

Zhou

Wang

et al. 2016

Advanced Energy Materials

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Nanostructured materials show a promising future in energy conversion and storage. However, different challenges shall be addressed to take the full advantages of nanomaterials, such as excess charge recombination sites yielded from large surface area and inefficient charge carrier separation because of poor material junctions in solar cells and solar water splitting cells, as well as high risk of surface side reactions and low active material density in batteries and supercapacitors. Considering its surface self‐limiting reaction mechanism, atomic layer deposition (ALD) enables the deposition of a thin film on high aspect ratio structures with a highly controllable manner (e.g., atomic accuracy and perfect conformity), which make it very suitable to overcome the key challenges associated with the size and dimension decrease of nanomaterials. In this review, the recent progress of the ALD application and processing in energy‐related devices is highlighted. Particular emphasis is placed on employing ALD for improving the device performance via synthesizing, modifying, or stabilizing their corresponding components. Finally, the challenges regarding the material synthesis and scalable manufacturing of the ALD technique are also discussed.

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Gallium Sulfide–Single‐Walled Carbon Nanotube Composites: High‐Performance Anodes for Lithium‐Ion Batteries

Cited by 107 publications

References 38 publications

Tunable core-shell single-walled carbon nanotube-Cu2S networked nanocomposites as high-performance cathodes for lithium-ion batteries

Tunable core-shell single-walled carbon nanotube-Cu2S networked nanocomposites as high-performance cathodes for lithium-ion batteries

Enabling Flexible Heterostructures for Li‐Ion Battery Anodes Based on Nanotube and Liquid‐Phase Exfoliated 2D Gallium Chalcogenide Nanosheet Colloidal Solutions

Nanoengineering Energy Conversion and Storage Devices via Atomic Layer Deposition

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