Oxygen vacancies enhance the electrochemical performance of carbon-coated TiP2O7-y anode in aqueous lithium ion batteries

Bin, Duan; Wen, Yunping; Yuan, Yingbo; Liu, Yao; Wang, Yonggang; Wang, Congxiao; Xia, Yongyao

doi:10.1016/j.electacta.2019.134555

Cited by 20 publications

(13 citation statements)

References 47 publications

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“…Wu et al [35] annealed TiO 2 at 500 °C in a nearly vacuum condition (12 mTorr) for 2 h. The presence of OVs was evidenced by the peak at 531.6 eV in the O 1s X-ray photoelectron spectroscopy (XPS) spectrum of the obtained TiO 2 , and resulted in enhanced SIB performance, especially better cycle stability compared with the OV-free TiO 2 . A similar annealing condition was also used to obtain oxygen-deficient TiP 2 O 7 as an anode for LIBs [36].…”

Section: Heat Treatment In Oxygen-deficient Atmospheresmentioning

confidence: 99%

The role of oxygen vacancies in metal oxides for rechargeable ion batteries

Wei

2021

Sci. China Chem.

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Rechargeable ion batteries are one of the most reliable energy storage technologies for the applications ranging from small portable devices and electric vehicles to renewable energy integration and large-scale stationary energy storage. In the roadmap of developing and understanding new electrode materials for rechargeable ion batteries, oxygen vacancies, known as defects in metal oxides, have shown a high impact on the final electrochemical performance of the oxides. The present review aims to summarise the synthesis methods and characterisation techniques of oxygen vacancies as well as some of the most recent and exciting progress made to understand the role of oxygen vacancies in the electrochemical performance of Li-, Na-, K-and Zn-ion batteries. This review discusses not only the role of oxygen vacancies directly in electrode materials and indirectly in the coating layers on electrode materials, but also the synergistic role of oxygen vacancies interplaying with other contributors such as carbonaceous materials, doping, amorphisation, structural transformation, nanostructuring and functional coating. Finally, perspectives are given to stimulate new ideas and open questions to facilitate the further development of oxygen deficient electrode materials in energy research landscape.

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Section: Heat Treatment In Oxygen-deficient Atmospheresmentioning

confidence: 99%

The role of oxygen vacancies in metal oxides for rechargeable ion batteries

Wei

2021

Sci. China Chem.

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“…Moreover, the C‐TiP 2 O 7– y electrode can present a capacity retention of 89% after 500 cycles at a current density of 0.5 A g −1 . [ 50 ]…”

Section: Vacancy Regulationmentioning

confidence: 99%

“…Moreover, the C-TiP 2 O 7-y electrode can present a capacity retention of 89% after 500 cycles at a current density of 0.5 A g −1 . [50] The multivalent ions showed a slow ion diffusion in the host materials due to stronger shackle of electronegative atoms in electrode materials in the aqueous metal-ion batteries. Based on this, anion vacancy can influence the Zn 2+ adsorption on the material surface, whereby the calculated Gibbs free energy of Zn 2+ adsorption provides an estimation gauging the ease of Zn 2+ adsorption/desorption, i.e., reversibility.…”

Section: (6 Of 30)mentioning

confidence: 99%

“…[45][46][47] Besides, in recent decades, the intrinsic structure modification referred to vacancy regulation, interlayer engineering and element doping have been adopted to optimize the electronic and phase structure of electrode materials, contributing to elevated ion diffusion, fast charge transfer, and adequate active sites for electrochemical reaction. [48][49][50][51] As shown in Figure 1, various intrinsic structure modifications play different roles in promoting electrode materials as well as their applications in aqueous metal-ion and metal-air batteries, respectively. It is worth noting that the gas evolution should be suppressed in the aqueous metal-ion batteries while the ORR and OER are supposed to be facilitated in aqueous metal-air batteries.…”

Section: Introductionmentioning

confidence: 99%

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Intrinsic Structure Modification of Electrode Materials for Aqueous Metal‐Ion and Metal‐Air Batteries

Ling

Wang

Chen

et al. 2020

Adv Funct Materials

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In consideration of low cost, simple operation, safe reliability, and environmental benignity, aqueous rechargeable batteries (ARBs) have attracted great interest among portable electronic devices, energy storage, and power source batteries. As the key components of ARBs, the electrode materials lead to a crucial effect for the overall battery properties, such as working voltage, electrocatalytic activity, capacity, and cycling stability. However, owing to the highly reactive aqueous environment, the electrode materials typically demonstrate a series of issues, including active material dissolution, structural instability, and poor catalytic activity, restricting their application. So far, several researchers have devoted much effort to improve the properties of electrode materials for ARBs. In particular, intrinsic structure modification in terms of vacancy regulation, interlayer engineering, and element doping have been applied to optimize the electronic and phase structure of electrode materials, contributing to elevated ion diffusion, fast charge transfer, and adequate active sites for electrochemical reaction. In this review, recent reports are demonstrated about the intrinsic structure modification of electrode materials in aqueous metal‐ion and metal‐air batteries, focusing on various regulation strategies and functional mechanisms. Finally, a brief conclusion and perspective is presented to demonstrate constructive suggestions and opinions for further research.

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“…Furthermore, the appearance of oxygen vacancies is equivalent to the introduction of the electronic field in TiP 2 O 7‐y , which can accelerate Li + transport [16] . Bin et al [17] . prepared TiP 2 O 7‐y anodes with oxygen vacancies by solid‐phase method, in aqueous lithium‐ion batteries, which showed remarkable electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy Modulated TiP₂O_7‐y with Enhanced High‐rate Capabilities and Long‐term Cyclability used as Anode Material for Lithium‐ion Batteries

et al. 2021

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Oxygen‐deficient TiP2O7‐y is synthesized by solvothermal and high‐temperature solid‐phase methods. X‐ray powder diffraction (XRD) test data analyses reveal that the solvothermal reaction time can affect the density of oxygen defects in the TiP2O7‐y. Fourier transform infrared spectra (FT‐IR) shows that there is a blue shift in the P−O bond because of the presence of oxygen vacancies. It is strongly demonstrated that oxygen vacancies exist in TiP2O7‐y because electron paramagnetic resonance (EPR) shows sharp peaks at g=2.003. Oxygen vacancy modulated TiP2O7‐y with exposed (541) face shows long cycling stability and super high‐rate capabilities. The initial discharge capacity of TiP2O7‐y, which was prepared after solvothermal reaction for 18 h, reached 828.4 mAh g−1. It can still maintain 246.9 mAh g−1, at 0.5 A g−1, after 500 cycles. Even cycled at 5 A g−1, the reversible rate capacity was maintained at 209.7 mAh g−1. Oxygen vacancies can not only improve the electronic conductivity of TiP2O7‐y but also increase the lithium‐ion diffusion rate.

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Oxygen vacancies enhance the electrochemical performance of carbon-coated TiP2O7-y anode in aqueous lithium ion batteries

Cited by 20 publications

References 47 publications

The role of oxygen vacancies in metal oxides for rechargeable ion batteries

The role of oxygen vacancies in metal oxides for rechargeable ion batteries

Intrinsic Structure Modification of Electrode Materials for Aqueous Metal‐Ion and Metal‐Air Batteries

Oxygen Vacancy Modulated TiP₂O_7‐y with Enhanced High‐rate Capabilities and Long‐term Cyclability used as Anode Material for Lithium‐ion Batteries

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Oxygen vacancies enhance the electrochemical performance of carbon-coated TiP2O7-y anode in aqueous lithium ion batteries

Cited by 20 publications

References 47 publications

The role of oxygen vacancies in metal oxides for rechargeable ion batteries

The role of oxygen vacancies in metal oxides for rechargeable ion batteries

Intrinsic Structure Modification of Electrode Materials for Aqueous Metal‐Ion and Metal‐Air Batteries

Oxygen Vacancy Modulated TiP2O7‐y with Enhanced High‐rate Capabilities and Long‐term Cyclability used as Anode Material for Lithium‐ion Batteries

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Oxygen Vacancy Modulated TiP₂O_7‐y with Enhanced High‐rate Capabilities and Long‐term Cyclability used as Anode Material for Lithium‐ion Batteries