Interfacial Lattice‐Strain‐Driven Generation of Oxygen Vacancies in an Aerobic‐Annealed TiO<sub>2</sub>(B) Electrode

Zhang, Wei; Cai, Lingfeng; Cao, Shengkai; Qiao, Liang; Zeng, Yi; Zhu, Zhiqiang; Lv, Zhisheng; Xia, Huarong; Zhong, Lixiang; Zhang, Hongwei; Ge, Xiang; Wei, Jiaqi; Xi, Shibo; Du, Yonghua; Li, Shuzhou; Chen, Xiao

doi:10.1002/adma.201906156

Cited by 64 publications

(47 citation statements)

References 103 publications

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“…Moreover, the rough edges without discernible lattice fringe imply the existence of a mass of surface defects in the CoMoO 4 nanocrystals (red lines indicated). [30] The similar phenomena are also observed in the HRTEM images of CoMoO 4 -Air in Figure 2i-2l. The interplanar spacing of 0.31 nm is consistent with the (-311) plane of CoMoO 4 .…”

Section: Resultssupporting

confidence: 75%

“…The blurry lattice image in Figure 2f indicates the existence of the CoMoO 4 atomic structure distortion, arising from the oxygen atom deficiencies. Moreover, the rough edges without discernible lattice fringe imply the existence of a mass of surface defects in the CoMoO 4 nanocrystals (red lines indicated) [30] . The similar phenomena are also observed in the HRTEM images of CoMoO 4 ‐Air in Figure 2i–2l.…”

Section: Resultssupporting

confidence: 71%

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Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

et al. 2020

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The application of transition-metal oxides in the energy storage field is hampered by its low electronic conductivity, sluggish Li + diffusion, and huge volume changes. The construction of oxygen vacancy defects can effectively modify the electronic structure of the active materials, accelerating the charge transfer process. Herein, the CoMoO 4 nanorods with different oxygen vacancy concentrations are synthesized through the facile calcination process under N 2 and Air atmospheres. The ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) analysis and Density Functional Theory (DFT) calculation results confirm that the bandgap reduces along with the increment of the oxygen vacancy content. The CoMoO 4-N 2 with higher oxygen vacancy concentration exhibits more superior electrochemical performance than CoMoO 4-Air, which delivers an ultrahigh specific capacity (999 mA h g À 1 after 500 cycles at 0.5 A g À 1), remarkable rate capacity (477 mA h g À 1 at 9 A g À 1), and excellent cycling stability (650 mA h g À 1 after 1000 cycles at 2 A g À 1).

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Section: Resultssupporting

confidence: 75%

Section: Resultssupporting

confidence: 71%

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

et al. 2020

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“…[47] (e) Schematic illustration of synthetic process for the introduction of oxygen vacancies into TiO2 via metal oxide surface coating in air-annealing environment. [47] vacancies can be created locally via charge compensation. Similarly, Dai et al adjusted the cerium dopant content to create and mediate oxygen defects in the host Bi 2 MoO 6 lattice.…”

Section: Dopingmentioning

confidence: 99%

“…[ 45 ] (d) The proposed approach to construct oxide heterostructures for the introduction of interfacial lattice strain based on uneven volumetric shrinkage. [ 47 ] (e) Schematic illustration of synthetic process for the introduction of oxygen vacancies into TiO 2 via metal oxide surface coating in air‐annealing environment. [ 47 ]…”

Section: Oxygen Defects Tailoring In Nanostructured Metal Oxidesmentioning

confidence: 99%

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Oxygen Defects in Nanostructured Metal‐Oxide Gas Sensors: Recent Advances and Challenges^†

Ding

Liu

et al. 2020

Chin. J. Chem.

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Defect engineering has been the most promising strategy to modulate the surface microstructure and electronic structure of the metal oxides, which will govern the efficiency of a given oxide for the applications in heterogeneous catalysis, energy storage and conversion fields, and gas sensing. This review summarizes recent research advances on understanding the role of oxygen vacancies of the metal oxides in gas sensing. First, different strategies for oxygen vacancy productions are summarized and compared. Then, the proper characterization techniques for oxygen vacancy are introduced. Importantly, the structure-activity relationships between vacancy engineering and gas sensing ability are further illustrated coupling the experimental results and theoretical studies. Finally, the key challenges and prospects regarding defect engineering in gas sensing are highlighted. Wenjie Ding (left) obtained his bachelor degree from Beijing Forestry University in 2018. Currently, he is pursuing his master degree under the supervision of Associate Professor Jiajia Liu in Beijing Instituted of Technology, China. His current research interests mainly focus on the synthesis of nanomaterials for the application of gas sensing. Dr. Jiajia Liu (middle) received her PhD degree in 2010 from Department of Chemical & Biomolecular Engineering of National University of Singapore, Singapore. Currently, she is Associate Professor in School of Materials and Engineering, Beijing Institute of Technology, China. Her current research interest is the development of metal oxide nanostructures and their applications in sensor, catalysis, and optoelectronics. Jiatao Zhang (right) was born in 1975. He earned his PhD from the Department of Chemistry, Tsinghua University, in 2006. Currently, he is Xu Teli Professor in the School of Materials and Engineering, BIT. He was awarded the Excellent Young Scientist foundation of NSFC in 2013. He also serves as the director of Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications. His current research interest is inorganic chemistry of semiconductor-based hybrid nanostructures with novel optical, electronic properties for the applications in energy conversion and storage, catalysis, optoelectronics and biology.

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Enabling Stable Cycling of 4.2 V High‐Voltage All‐Solid‐State Batteries with PEO‐Based Solid Electrolyte

Qiu

Liu

Chen

et al. 2020

Adv Funct Materials

257

162

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Poly(ethylene oxide) (PEO)-based solid electrolytes are expected to be exploited in solid-state batteries with high safety. Its narrow electrochemical window, however, limits the potential for high voltage and high energy density applications. Herein the electrochemical oxidation behavior of PEO and the failure mechanisms of LiCoO 2 -PEO solid-state batteries are studied. It is found that although for pure PEO it starts to oxidize at a voltage of above 3.9 V versus Li/Li + , the decomposition products have appropriate Li + conductivity that unexpectedly form a relatively stable cathode electrolyte interphase (CEI) layer at the PEO and electrode interface. The performance degradation of the LiCoO 2 -PEO battery originates from the strong oxidizing ability of LiCoO 2 after delithiation at high voltages, which accelerates the decomposition of PEO and drives the self-oxygen-release of LiCoO 2 , leading to the unceasing growth of CEI and the destruction of the LiCoO 2 surface. When LiCoO 2 is well coated or a stable cathode LiMn 0.7 Fe 0.3 PO 4 is used, a substantially improved electrochemical performance can be achieved, with 88.6% capacity retention after 50 cycles for Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 coated LiCoO 2 and 90.3% capacity retention after 100 cycles for LiMn 0.7 Fe 0.3 PO 4 . The results suggest that, when paired with stable cathodes, the PEO-based solid polymer electrolytes could be compatible with high voltage operation.

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Interfacial Lattice‐Strain‐Driven Generation of Oxygen Vacancies in an Aerobic‐Annealed TiO₂(B) Electrode

Cited by 64 publications

References 103 publications

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

Oxygen Defects in Nanostructured Metal‐Oxide Gas Sensors: Recent Advances and Challenges^†

Enabling Stable Cycling of 4.2 V High‐Voltage All‐Solid‐State Batteries with PEO‐Based Solid Electrolyte

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Interfacial Lattice‐Strain‐Driven Generation of Oxygen Vacancies in an Aerobic‐Annealed TiO2(B) Electrode

Cited by 64 publications

References 103 publications

Tailoring Oxygen Vacancies in CoMoO4 for Superior Lithium Storage

Tailoring Oxygen Vacancies in CoMoO4 for Superior Lithium Storage

Oxygen Defects in Nanostructured Metal‐Oxide Gas Sensors: Recent Advances and Challenges†

Enabling Stable Cycling of 4.2 V High‐Voltage All‐Solid‐State Batteries with PEO‐Based Solid Electrolyte

Contact Info

Product

Resources

About

Interfacial Lattice‐Strain‐Driven Generation of Oxygen Vacancies in an Aerobic‐Annealed TiO₂(B) Electrode

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

Oxygen Defects in Nanostructured Metal‐Oxide Gas Sensors: Recent Advances and Challenges^†