Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/139019
Title: Interfacial lattice‐strain‐driven generation of oxygen vacancies in an aerobic‐annealed TiO2(B) electrode
Authors: 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, Xiaodong
Keywords: Engineering::Materials
Issue Date: 2019
Source: Zhang, W., Cai, L., Cao, S., Qiao, L., Zeng, Y., Zhu, Z., . . . Chen, X. (2019). Interfacial lattice‐strain‐driven generation of oxygen vacancies in an aerobic‐annealed TiO2(B) electrode. Advanced Materials, 31(52), 1906156-. doi:10.1002/adma.201906156
Journal: Advanced Materials
Abstract: Oxygen vacancies play crucial roles in defining physical and chemical properties of materials to enhance the performances in electronics, solar cells, catalysis, sensors, and energy conversion and storage. Conventional approaches to incorporate oxygen defects mainly rely on reducing the oxygen partial pressure for the removal of product to change the equilibrium position. However, directly affecting reactants to shift the reaction toward generating oxygen vacancies is lacking and to fill this blank in synthetic methodology is very challenging. Here, a strategy is demonstrated to create oxygen vacancies through making the reaction energetically more favorable via applying interfacial strain on reactants by coating, using TiO2(B) as a model system. Geometrical phase analysis and density functional theory simulations verify that the formation energy of oxygen vacancies is largely decreased under external strain. Benefiting from these, the obtained oxygen‐deficient TiO2(B) exhibits impressively high level of capacitive charge storage, e.g., ≈53% at 0.5 mV s−1, far surpassing the ≈31% of the unmodified counterpart. Meanwhile, the modified electrode shows significantly enhanced rate capability delivering a capacity of 112 mAh g−1 at 20 C (≈6.7 A g−1), ≈30% higher than air‐annealed TiO2 and comparable to vacuum‐calcined TiO2. This work heralds a new paradigm of mechanical manipulation of materials through interfacial control for rational defect engineering.
URI: https://hdl.handle.net/10356/139019
ISSN: 0935-9648
DOI: 10.1002/adma.201906156
Rights: This is the peer reviewed version of the following article: Zhang, W., Cai, L., Cao, S., Qiao, L., Zeng, Y., Zhu, Z., . . . Chen, X. (2019). Interfacial lattice‐strain‐driven generation of oxygen vacancies in an aerobic‐annealed TiO2(B) electrode. Advanced Materials, 31(52), 1906156-. doi:10.1002/adma.201906156, which has been published in final form at https://doi.org/10.1002/adma.201906156. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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