Preparation and electrochemical lithium storage features of TiO2 hollow spheres

Liang, Xiao; Cao, Minglei; Mei, Daidi; Guo, Yonglin; Yao, Lei; Qu, Deyu; Deng, Bohua

doi:10.1016/j.jpowsour.2013.03.081

Cited by 41 publications

(24 citation statements)

References 27 publications

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“…These ATHMS electrodes showed discharge capacities of 201, 200, 184, and 174 mAh g −1 , and maintaining 87%, 84%, 88%, and 87% of the initial discharge capacity after 100 cycles, respectively. The discharge capacity retention and cycling stability for ATHMS electrodes after 50 or 100 cycles reported here are higher than that of other TiO 2 anatase tubular structures89101317, mesoporous hollow sphere18192021, and even that treated with conductive pathways such as TiO 2 /graphene2728, and mesoporous TiO 2 :RuO 2 composite electrodes29 while tested under similar conditions. In particular, the discharge capacities only decreases slightly to 158 mAh g −1 at 2.5 C, and 150 mAh g −1 at 5 C after 1000 cycles, corresponding to 87%, and 92% of their initial capacity, respectively (Figure 6c).…”

Section: Resultsmentioning

confidence: 56%

Constructing hierarchical submicrotubes from interconnected TiO2 nanocrystals for high reversible capacity and long-life lithium-ion batteries

Xin

Liu

et al. 2014

Sci Rep

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Here, we report a facile hydrothermal approach for synthesizing anatase TiO2 hierarchical mesoporous submicrotubes (ATHMSs) with the aid of long-chain polymer as soft template. The TiO2 nanocrystals, with sizes of 6–8 nm, are well interconnected with each other to build tubular architectures with diameters of 0.3–1.5 μm and lengths of 10–25 μm. Such highly porous structures give rise to very large specific surface area of 201.9 m2 g−1 and 136.8 m2 g−1 for the as-prepared and annealed samples, respectively. By using structurally stable ATHMSs as anode materials for lithium-ion batteries, they exhibited high reversible capacity, long cycling life and excellent cycling stability. Even after 1000 cycles, such ATHMS electrodes retained a reversible discharge capacity as high as 150 mAh g−1 at the current density of 1700 mA g−1, maintaining 92% of the initial discharge capacity (163 mAh g−1).

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Section: Resultsmentioning

confidence: 56%

Constructing hierarchical submicrotubes from interconnected TiO2 nanocrystals for high reversible capacity and long-life lithium-ion batteries

Xin

Liu

et al. 2014

Sci Rep

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“…Meanwhile, the lithiated Li n TiO 2 shows mixed Ti 3+/4+ valence as a result of charge compensation, and thus possesses a high electronic conductivity. The lithiation of TiO 2 produces a negligible volume change . Therefore, the nanocrystals of TiO 2 dispersing in SiO x matrix can dilute the big volume change caused by silicon component and act as a buffer to stabilize the active particle structure.…”

Section: Resultsmentioning

confidence: 99%

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

Zhao

et al. 2018

Adv Funct Materials

194

100

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A unique watermelon-like structured SiO x -TiO 2 @C nanocomposite is synthesized by a scalable sol-gel method combined with carbon coating process. Ultrafine TiO 2 nanocrystals are uniformly embedded inside SiO x particles, forming SiO x -TiO 2 dual-phase cores, which are coated with outer carbon shells. The incorporation of TiO 2 component can effectively enhance the electronic and lithium ionic conductivities inside the SiO x particles, release the structure stress caused by alloying/dealloying of Si component and maximize the capacity utilization by modifying the Si-O bond feature and decreasing the O/Si ratio (x-value). The synergetic combination of these advantages enables the synthesized SiO x -TiO 2 @C nanocomposite to have excellent electrochemical performances, including high specific capacity, excellent rate capability, and stable long-term cycleability. A stable specific capacity of ≈910 mAh g −1 is achieved after 200 cycles at the current density of 0.1 A g −1 and ≈700 mAh g −1 at 1 A g −1 for over 600 cycles. These results suggest a great promise of the proposed particle architecture, which may have potential applications in the improvement of various energy storage materials.

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“…Figure a compares the charge/discharge profiles of a sophisticated commercial nanoanatase TiO 2 (25 nm) with that of an A7‐25 mesocrystal‐like nanostructure (A stands for anatase and 7, 25 are the sizes of the anatase unit and the spherical nanostructure expressed in nanometers). Both voltage profiles are similar, showing the characteristic three well‐defined region previously reported for anatase TiO 2 ,. Ren et al.…”

Section: Titanium Oxides Nanostructures As Anode For Li‐ion Batteriesmentioning

confidence: 99%

TiO₂ Nanostructures as Anode Materials for Li/Na‐Ion Batteries

Vázquez-Santos

Tartaj

Morales

et al. 2018

The Chemical Record

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Here we summarize some results on the use of TiO nanostructures as anode materials for more efficient Li-ion (LIBs) and Na-ion (NIBs) batteries. LIBs are the leader to power portable electronic devices, and represent in the short-term the most adequate technology to power electrical vehicles, while NIBs hold promise for large storage of energy generated from renewable sources. Specifically, TiO an abundant, low cost, chemically stable and environmentally safe oxide represents in LIBs an alternative to graphite for applications in which safety is mandatory. For NIBs, TiO anodes (or more precisely negative electrodes) work at low voltage, assuring acceptable energy density values. Finally, assembling different TiO polymorphs in the form of nanostructures decreases diffusion distances, increases the number of contacts and offering additional sites for Na storage, helping to improve power efficiency. More specifically, in this contribution we highlighted our work on TiO anatase mesocrystals of colloidal size. These sophisticate materials; showing excellent textural properties, have remarkable electrochemical performance as anodes for Li/Na-ion batteries, with conventional alkyl carbonates electrolytes and safe electrolytes based on ionic liquids.

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Preparation and electrochemical lithium storage features of TiO2 hollow spheres

Cited by 41 publications

References 27 publications

Constructing hierarchical submicrotubes from interconnected TiO2 nanocrystals for high reversible capacity and long-life lithium-ion batteries

Constructing hierarchical submicrotubes from interconnected TiO2 nanocrystals for high reversible capacity and long-life lithium-ion batteries

Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

TiO₂ Nanostructures as Anode Materials for Li/Na‐Ion Batteries

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Preparation and electrochemical lithium storage features of TiO2 hollow spheres

Cited by 41 publications

References 27 publications

Constructing hierarchical submicrotubes from interconnected TiO2 nanocrystals for high reversible capacity and long-life lithium-ion batteries

Constructing hierarchical submicrotubes from interconnected TiO2 nanocrystals for high reversible capacity and long-life lithium-ion batteries

Watermelon‐Like Structured SiOx–TiO2@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

TiO2 Nanostructures as Anode Materials for Li/Na‐Ion Batteries

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Watermelon‐Like Structured SiO_x–TiO₂@C Nanocomposite as a High‐Performance Lithium‐Ion Battery Anode

TiO₂ Nanostructures as Anode Materials for Li/Na‐Ion Batteries