Mesoporous single-crystal-like TiO2 mesocages threaded with carbon nanotubes for high-performance electrochemical energy storage

Peng, Yiting; Le, Zaiyuan; Wen, Meicheng; Zhang, Dieqing; Chen, Zheng; Wu, Hao; Li, Hexing; Lu, Yunfeng

doi:10.1016/j.nanoen.2017.03.003

Cited by 76 publications

(38 citation statements)

References 29 publications

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“…Using a virus‐templated, 3D nanofoam enables the formation of a conductive nickel network during discharge, which facilitates electronic transport without additional inactive components. In terms of volumetric capacity, further improvements are expected for denser nanofoams . Traditional solid‐processing strategies for increasing overall density, such as tapping, are not applicable for our solution‐processed materials.…”

Section: Resultsmentioning

confidence: 99%

Virus‐Templated Nickel Phosphide Nanofoams as Additive‐Free, Thin‐Film Li‐Ion Microbattery Anodes

Records

Wei

Belcher

2019

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Transition metal phosphides are a new class of materials generating interest as alternative negative electrodes in lithium‐ion batteries. However, metal phosphide syntheses remain underdeveloped in terms of simultaneous control over phase composition and 3D nanostructure. Herein, M13 bacteriophage is employed as a biological scaffold to develop 3D nickel phosphide nanofoams with control over a range of phase compositions and structural elements. Virus‐templated Ni5P4 nanofoams are then integrated as thin‐film negative electrodes in lithium‐ion microbatteries, demonstrating a discharge capacity of 677 mAh g–1 (677 mAh cm–3) and an 80% capacity retention over more than 100 cycles. This strong electrochemical performance is attributed to the virus‐templated, nanostructured morphology, which remains electronically conductive throughout cycling, thereby sidestepping the need for conductive additives. When accounting for the mass of additional binder materials, virus‐templated Ni5P4 nanofoams demonstrate the highest practical capacity reported thus far for Ni5P4 electrodes. Looking forward, this synthesis method is generalizable and can enable precise control over the 3D nanostructure and phase composition in other metal phosphides, such as cobalt and copper.

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Section: Resultsmentioning

confidence: 99%

Virus‐Templated Nickel Phosphide Nanofoams as Additive‐Free, Thin‐Film Li‐Ion Microbattery Anodes

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Wei

Belcher

2019

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“…Apart from the above-mentioned doping strategies, the coupling of TiO 2 mesocrystals with appropriate foreign elements to construct TiO 2 mesocrystal-based heterostructures is considered to be another effective way to enhance the light absorbance capability as well as inhibit the photoinduced charge carrier recombination [17,18,21]. Hitherto, various kinds of foreign elements have been successfully utilized to modify anatase TiO 2 mesocrystals [59,60,[169][170][171][172][173][174][175][176][177][178][179][180][181][182][183]. For example, Sun's group successfully fabricated spindle-like TiO 2 /CdS composites by uniformly distributing CdS nanoparticles onto nanoporous anatase mesocrystals via the simple hydrothermal and hot-injection methods [170].…”

Section: Construction Of Tio 2 Mesocrystal-based Heterostructuresmentioning

confidence: 99%

Titanium Dioxide (TiO2) Mesocrystals: Synthesis, Growth Mechanisms and Photocatalytic Properties

Zhang

Cao

et al. 2019

Catalysts

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Hierarchical TiO2 superstructures with desired architectures and intriguing physico-chemical properties are considered to be one of the most promising candidates for solving the serious issues related to global energy exhaustion as well as environmental deterioration via the well-known photocatalytic process. In particular, TiO2 mesocrystals, which are built from TiO2 nanocrystal building blocks in the same crystallographical orientation, have attracted intensive research interest in the area of photocatalysis owing to their distinctive structural properties such as high crystallinity, high specific surface area, and single-crystal-like nature. The deeper understanding of TiO2 mesocrystals-based photocatalysis is beneficial for developing new types of photocatalytic materials with multiple functionalities. In this paper, a comprehensive review of the recent advances toward fabricating and modifying TiO2 mesocrystals is provided, with special focus on the underlying mesocrystallization mechanism and controlling rules. The potential applications of as-synthesized TiO2 mesocrystals in photocatalysis are then discussed to shed light on the structure–performance relationships, thus guiding the development of highly efficient TiO2 mesocrystal-based photocatalysts for certain applications. Finally, the prospects of future research on TiO2 mesocrystals in photocatalysis are briefly highlighted.

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“…Among the BMOs available, NiCo 2 O 4 has attracted attention for use in high performance electrochemical SCs applications owing to its outstanding electrochemical conductivity, high theoretical capacitance, and rapid redox activities [13][14][15]. Different types of nanostructures (NiCo 2 O 4 ), including nanoplates/sheets, nanoparticles/wires and needles, nanospheres/tubes, and nanorods, have been fabricated for SC applications [16][17][18]. For example, Zou et al fabricated chain-like NiCo 2 O 4 nanowires using a facile hydrothermal and thermal decomposition approach and reported a specific capacitance (Cs) of 1284 F g −1 at 2 A g −1 [19].…”

Section: Introductionmentioning

confidence: 99%

Facilely Synthesized NiCo2O4/NiCo2O4 Nanofile Arrays Supported on Nickel Foam by a Hydrothermal Method and Their Excellent Performance for High-Rate Supercapacitance

Kumar¹,

Araveeti²,

Kim³

2019

Energies

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NiCo 2 O 4 nanoleaf arrays (NCO NLAs) and NiCo 2 O 4 /NiCO 2 O 4 nanofile arrays (NCO/NCO NFAs) material was fabricated on flexible nickel foam (NF) using a facile hydrothermal approach. The electrochemical performance, including the specific capacitance, charge/discharge cycles, and lifecycle of the material after the hydrothermal treatment, was assessed. The morphological and structural behaviors of the NF@NCO NLAs and NF@NCO/NCO NFAs electrodes were analyzed using a range of analysis techniques. The as-obtained nanocomposite of the NF@NCO/NCO NFAs material delivered outstanding electrochemical performance, including an ultrahigh specific capacitance (Cs) of 2312 F g −1 at a current density of 2 mA cm −2 , along with excellent cycling stability (98.7% capacitance retention after 5000 cycles at 5 mA cm −2 ). These values were higher than those of NF@NCO NLAs (Cs of 1950 F g −1 and 96.3% retention). The enhanced specific capacitance was attributed to the large electrochemical surface area, which allows for higher electrical conductivity and rapid transport between the electrons and ions as well as a much lower charge-transfer resistance and superior rate capability. These results clearly show that a combination of two types of binary metal oxides could be favorable for improving electrochemical performance and is expected to play a major role in the future development of nanofile-like composites (NF@NCO/NCO NFAs) for supercapacitor applications.

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Mesoporous single-crystal-like TiO2 mesocages threaded with carbon nanotubes for high-performance electrochemical energy storage

Cited by 76 publications

References 29 publications

Virus‐Templated Nickel Phosphide Nanofoams as Additive‐Free, Thin‐Film Li‐Ion Microbattery Anodes

Virus‐Templated Nickel Phosphide Nanofoams as Additive‐Free, Thin‐Film Li‐Ion Microbattery Anodes

Titanium Dioxide (TiO2) Mesocrystals: Synthesis, Growth Mechanisms and Photocatalytic Properties

Facilely Synthesized NiCo2O4/NiCo2O4 Nanofile Arrays Supported on Nickel Foam by a Hydrothermal Method and Their Excellent Performance for High-Rate Supercapacitance

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