Oxygen deficient, carbon coated self-organized TiO<sub>2</sub> nanotubes as anode material for Li-ion intercalation

Brumbarov, Jassen; Vivek, J. Padmanabhan; Leonardi, Silvia; Valero-Vidal, Carlos; Portenkirchner, Engelbert; Kunze‐Liebhäuser, Julia

doi:10.1039/c5ta03621f

Cited by 56 publications

(87 citation statements)

References 60 publications

(148 reference statements)

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“…In this synthetic route, the precursor was synthesized by a sol–gel method and then calcined in air to yield α-Fe 2 O 3 nanoparticles with oxygen vacancies. The partial reduction of Fe(III) during the carbon-thermic process leads to the formation of oxygen vacancies in the final product, which has also been reported for the synthesis of titanium dioxide with oxygen vacancies [21, 26]. Compared with the previous reports, the preparation of α-Fe 2 O 3 nanoparticles with oxygen vacancies is more simple, which will lower the cost during the production process.…”

Section: Introductionmentioning

confidence: 91%

Enhancement of Electrochemical Performance by the Oxygen Vacancies in Hematite as Anode Material for Lithium-Ion Batteries

et al. 2017

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The application of hematite in lithium-ion batteries (LIBs) has been severely limited because of its poor cycling stability and rate performance. To solve this problem, hematite nanoparticles with oxygen vacancies have been rationally designed by a facile sol–gel method and a sequential carbon-thermic reduction process. Thanks to the existence of oxygen vacancies, the electrochemical performance of the as-obtained hematite nanoparticles is greatly enhancing. When used as the anode material in LIBs, it can deliver a reversible capacity of 1252 mAh g−1 at 2 C after 400 cycles. Meanwhile, the as-obtained hematite nanoparticles also exhibit excellent rate performance as compared to its counterparts. This method not only provides a new approach for the development of hematite with enhanced electrochemical performance but also sheds new light on the synthesis of other kinds of metal oxides with oxygen vacancies.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-016-1783-0) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 91%

Enhancement of Electrochemical Performance by the Oxygen Vacancies in Hematite as Anode Material for Lithium-Ion Batteries

et al. 2017

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“…[1,5,6] The Na content in the earth's crust and in water amounts to about 28 400 mg kg À1 and 11 000 mg L À1 which is substantially more compared to 20 mg kg À1 and 0.18 mg L À1 for Li. [7] A simple transition from state of the art inorganic cathode materials used for Li-ion batteries, [8,9] to Na-ion batteries has mostly remained to no avail, because the inorganic crystalline structure has proven to be very sensitive with respect to the radius of the inserted ion. [10] On the other hand, the ion radius has very little effect on the electrochemical performance of organic materials, mainly due to their "soft" and "spongy" type of structure.…”

Section: Introductionmentioning

confidence: 99%

An Anthraquinone/Carbon Fiber Composite as Cathode Material for Rechargeable Sodium‐Ion Batteries

Werner

Apaydın

Portenkirchner

2018

Batteries & Supercaps

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The transition from rare to natural abundant materials in rechargeable batteries is becoming a grand challenge in developing a resource sustainable power supply. Since decades, scientists attempt to circumvent the lithium's resource problem by innovating alternative active metal ions. A cost‐effective alternative to lithium is to use sodium (Na) as the carrier ion in rechargeable batteries. We present an electrode composite material comprising anthraquinone (AQ) and nanostructured carbon fibers, as a cathode material for Na‐ion batteries. These electrodes are characterized by a large surface area, ordered porous network, large pore volume and good electrical conductivity. The material is further compared to the water soluble, mono‐substituted anthraquinone derivative, sulfonated 9,10‐anthraquinone (SAQ). While the SAQ/carbon fiber composite demonstrates a moderate initial discharge capacity of ∼95 mAh g−1 accompanied by substantial, initial capacity fading, the AQ/carbon fiber composite shows a remarkably high discharge capacity of ∼307 mAh g−1 and exhibit reasonable cycling stability over 115 charge/discharge cycles in a Na containing electrolyte. This may be best explained by the well‐structured intermolecular π‐π stacking of the thermally evaporated AQ layers and with the subjacent carbon fibers. Since AQ and SAQ are widely‐used industrial pigments, they may offer a cost‐effective, abundant and environmentally benign cathode material for secondary Na‐ion and Na‐flow batteries.

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“…[15] In addition, Chen et al designedb lack TiO 2 with ah igh density of oxygen vacancies, which benefitst he electronic conductivity and efficiently facilitates Na-ion transport. [16] Although the preparation of oxygen-deficient titanium dioxide has been reported previously,t here are few relevant reports on the usage of oxygen-deficient titaniumdioxide in Li-S batteries.…”

Section: Introductionmentioning

confidence: 99%

Oxygen‐Deficient Titanium Dioxide Nanosheets as More Effective Polysulfide Reservoirs for Lithium‐Sulfur Batteries

Wang

Fan

Zheng

et al. 2017

Chemistry A European J

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In this work, oxygen-deficient anatase TiO nanosheets (A-TiO NSs) are proposed as a substrate to improve the electrochemical properties of sulfur electrodes for lithium-sulfur (Li-S) batteries. The A-TiO NSs are prepared by partly reducing pristine TiO nanosheets (A-TiO NSs) in NaBH solution. With some oxygen vacancies on the surface of the TiO nanosheets, A-TiO NSs not only promote electronic transfer, but also act as more effective polysulfide reservoirs to minimize the dissolution of lithium polysulfides (LiPSs) than the A-TiO NSs control. Hence, upon utilization as modifiers for cathodes of Li-S batteries, the A-TiO NSs-modified sulfur (A-TiO NSs-S) cathode exhibits a higher reversible specific capacity and greater cycling performance and rate capability than the A-TiO NSs-modified one (A-TiO NSs-S). For example, A-TiO NSs-S delivers an initial specific capacity of 1277.1 mAh g at 0.1 C and maintains a stable Coulombic efficiency of approximately 99.2 % after the first five cycles; these values are higher than those of 997.3 mAh g and around 96.7 %, respectively, for A-TiO NSs-S. The enhanced electrochemical properties of the A-TiO NSs-S cathode can be ascribed mainly to the more effective adsorption of dissolvable and diffused LiPSs by the oxygen vacancies. Therefore, utilization of the structure of oxygen vacancies in Li-S batteries demonstrates great prospects for practical application.

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Oxygen deficient, carbon coated self-organized TiO₂ nanotubes as anode material for Li-ion intercalation

Abstract: Anatase TiO2−x–C nanotubes demonstrate a superior Li storage capacity as high as 320(±68) mA h g−1 compared to 180(±38) mA h g−1 for TiO2−x.

Cited by 56 publications

References 60 publications

Enhancement of Electrochemical Performance by the Oxygen Vacancies in Hematite as Anode Material for Lithium-Ion Batteries

Enhancement of Electrochemical Performance by the Oxygen Vacancies in Hematite as Anode Material for Lithium-Ion Batteries

An Anthraquinone/Carbon Fiber Composite as Cathode Material for Rechargeable Sodium‐Ion Batteries

Oxygen‐Deficient Titanium Dioxide Nanosheets as More Effective Polysulfide Reservoirs for Lithium‐Sulfur Batteries

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Oxygen deficient, carbon coated self-organized TiO2 nanotubes as anode material for Li-ion intercalation

Abstract: Anatase TiO2−x–C nanotubes demonstrate a superior Li storage capacity as high as 320(±68) mA h g−1 compared to 180(±38) mA h g−1 for TiO2−x.

Cited by 56 publications

References 60 publications

Enhancement of Electrochemical Performance by the Oxygen Vacancies in Hematite as Anode Material for Lithium-Ion Batteries

Enhancement of Electrochemical Performance by the Oxygen Vacancies in Hematite as Anode Material for Lithium-Ion Batteries

An Anthraquinone/Carbon Fiber Composite as Cathode Material for Rechargeable Sodium‐Ion Batteries

Oxygen‐Deficient Titanium Dioxide Nanosheets as More Effective Polysulfide Reservoirs for Lithium‐Sulfur Batteries

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Oxygen deficient, carbon coated self-organized TiO₂ nanotubes as anode material for Li-ion intercalation