TiO2/C nanocomposites prepared by thermal annealing of titanium glycerolate as anode materials for lithium-ion batteries

Захарова, Г. С.; Ottmann, Alexander; Möller, Lucas; Andreikov, E. I.; Фаттахова, З. А.; Пузырев, И. С.; Zhu, Quan; Thauer, E.; Klingeler, R.

doi:10.1007/s10853-018-2488-9

Cited by 13 publications

(5 citation statements)

References 47 publications

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“…A significant weight loss of ca. 40% at heating from 400 to 1000 8C can be explained by the total decomposition of the ZnGy precursor with simultaneous formation of zinc oxide, volatile products with low molecular weight and products of condensation of organic compounds, similar to titanium glycerolate [26]. Furthermore, the products of the condensation also undergo a disproportionation with the formation of volatile low molecular weight substances and the carbonaceous part of the ZnO composite.…”

Section: Resultsmentioning

confidence: 98%

“…Electrochemical studies were performed in Swagelok-type two electrode cells at 25°C by using a VMP3 potentiostat (Bio-Logic SAS) (see [26]). The preparation procedure of the working electrodes is as follows.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

“…Summarizing, although a significant progress has already been achieved, developing a facile route to synthesize carbon coated nanosized materials remains an important task to further improve the performance of ZnO-based anode materials. In the present paper, based on the results of our previous work [26], a synthetic route involving a thermal treatment of organometallic compounds was developed to prepare carbon-composited metal oxide. The formation of ZnO/C composites has been successfully realized by heat treatment of zinc glycerolate (ZnGly) under inert atmosphere.…”

Section: Introductionmentioning

confidence: 99%

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Novel synthesis and electrochemical investigations of ZnO/C composites for lithium-ion batteries

et al. 2021

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For the first time, ZnO/C composites were synthesized using zinc glycerolate as a precursor through one-step calcination under a nitrogen atmosphere. The effect of the heat treatment conditions on the structure, composition, morphology as well as on the electrochemical properties regarding application in lithium-ion batteries are investigated. The products obtained by calcination of the precursor in nitrogen at 400—800 °C consist of zinc oxide nanoparticles and amorphous carbon that is in-situ generated from organic components of the glycerolate precursor. When used as anode material for lithium-ion batteries, the as-prepared ZnO/C composite synthesized at a calcination temperature of 700 °C delivers initial discharge and charge capacities of 1061 and 671 mAh g−1 at a current rate of 100 mA g−1 and hence 1.5 times more than bare ZnO, which reaches only 749/439 mAh g−1. The native carbon improves the conductivity, allowing efficient electronic conductivity and Li-ion diffusion. By means of ex-situ XRD studies a two-step storage mechanism is proven.

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Section: Resultsmentioning

confidence: 98%

Section: Electrochemical Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel synthesis and electrochemical investigations of ZnO/C composites for lithium-ion batteries

et al. 2021

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“…4 . In the plain film, two peaks were observed at 9.975°—amorphous polymer and 19.625°—crystalline polymer 62 . After the catalyst immobilization, crystalline peaks of TiO 2 (anatase and rutile) and cerium peaks were observed (TiO 2 —ICSD no.…”

Section: Resultsmentioning

confidence: 99%

Upcycling of waste EPS beads to immobilized codoped TiO2 photocatalysts for ciprofloxacin degradation and E. coli disinfection under sunlight

Manjunatha,

Mahalingam

2023

Sci Rep

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The emerging global problem of antimicrobial resistance needs immediate attention. In this regard, this work demonstrates the use of expanded polystyrene waste in the synthesis of immobilized photocatalytic films for the treatment of antibiotics as well as for bacterial disinfection. A boron–cerium codoped TiO2 catalyst (of specific composition: B0.8Ce0.2TiO2) was immobilized in an expanded polystyrene (EPS) film prepared from waste EPS beads. These films were studied for the degradation of ciprofloxacin (CIP) and disinfection of E. coli under sunlight. The film with a catalyst loading of 20 wt% showed a maximum degradation of 89% in 240 min with a corresponding TOC reduction of 84%. A 7.4 and 6.3 log reduction from the bacterial inactivation studies in the presence and absence of antibiotics, respectively, was obtained. The EPS film was stable after five times of reuse, and no significant chemical changes in the used film were observed from FTIR analysis. The average thickness of the prepared film was found from FESEM analysis to be 1.09 mm. These EPS films were also tested for degradation of other antibiotics, such as norfloxacin, levofloxacin and moxifloxacin. The EPS films were tested in two different reactor volumes at optimum conditions. Also, the effectiveness of B0.8Ce0.2TiO2/EPS film in real water samples indicates its potential in large-scale and real-world applications. Thus, these B0.8Ce0.2TiO2/EPS films can be effectively employed for both degradation of ciprofloxacin and the disinfection of E. coli under solar light to solve the increasing problem of antimicrobial resistance.

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“…Mechanical strain arising from volume changes is additionally buffered by the hierarchical structures. In this way, such materials optimally maintain the integrity of the bulk material while offering improved electrical conductivity owing to a carbon-based backbone structure [15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Moreover, a strong backbone structure improves the stability of the composite with respect to mechanical strain arising from volume changes during electrochemical cycling.…”

Section: Introductionmentioning

confidence: 99%

Filled Carbon Nanotubes as Anode Materials for Lithium-Ion Batteries

et al. 2020

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Downsizing well-established materials to the nanoscale is a key route to novel functionalities, in particular if different functionalities are merged in hybrid nanomaterials. Hybrid carbon-based hierarchical nanostructures are particularly promising for electrochemical energy storage since they combine benefits of nanosize effects, enhanced electrical conductivity and integrity of bulk materials. We show that endohedral multiwalled carbon nanotubes (CNT) encapsulating high-capacity (here: conversion and alloying) electrode materials have a high potential for use in anode materials for lithium-ion batteries (LIB). There are two essential characteristics of filled CNT relevant for application in electrochemical energy storage: (1) rigid hollow cavities of the CNT provide upper limits for nanoparticles in their inner cavities which are both separated from the fillings of other CNT and protected against degradation. In particular, the CNT shells resist strong volume changes of encapsulates in response to electrochemical cycling, which in conventional conversion and alloying materials hinders application in energy storage devices.(2) Carbon mantles ensure electrical contact to the active material as they are unaffected by potential cracks of the encapsulate and form a stable conductive network in the electrode compound. Our studies confirm that encapsulates are electrochemically active and can achieve full theoretical reversible capacity. The results imply that encapsulating nanostructures inside CNT can provide a route to new high-performance nanocomposite anode materials for LIB.

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TiO2/C nanocomposites prepared by thermal annealing of titanium glycerolate as anode materials for lithium-ion batteries

Cited by 13 publications

References 47 publications

Novel synthesis and electrochemical investigations of ZnO/C composites for lithium-ion batteries

Novel synthesis and electrochemical investigations of ZnO/C composites for lithium-ion batteries

Upcycling of waste EPS beads to immobilized codoped TiO2 photocatalysts for ciprofloxacin degradation and E. coli disinfection under sunlight

Filled Carbon Nanotubes as Anode Materials for Lithium-Ion Batteries

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