Orderly defective superstructure for enhanced pseudocapacitive storage in titanium niobium oxide

Le Yang; Jinfeng Zeng; Lei Zhou; Ruiwen Shao; Wellars Utetiwabo; Muhammad Khurram Tufail; Saisai Wang; Wen Yang; Jiatao Zhang

doi:10.1007/s12274-021-3703-6

Orderly defective superstructure for enhanced pseudocapacitive storage in titanium niobium oxide

Le Yang, Jinfeng Zeng, Lei Zhou, Ruiwen Shao^*, Wellars Utetiwabo, Muhammad Khurram Tufail, Saisai Wang, Wen Yang^*, Jiatao Zhang

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

Artificial defect engineering in transition metal oxides is of important terms for numerous applications. In the present work, we proposed an in-situ gas reduction strategy to introduce ordered defects into titanium niobium oxide embedding on vapor grew carbon fibers (Ti₂Nb₁₀O₂₉₋_x@VGCFs). High-resolution transmission electron microscopy (HRTEM) and fast Fourier transform (FFT) simulation indicate that the ordered oxygen defects locate at interval layers, which leads to a new superstructure in Ti₂Nb₁₀O₂₉. The ordered defects could provide extra active sites for lithium-ion storage and modulate ionic migration, resulting an enhanced pseudocapacitive performance. In addition, the excellent structural stability of the superstructure was proved by in-situ HRTEM under a harsh electrochemical process. Our work provides a directly observation of orderly defective superstructure in transition metal oxide, and its functionality on electrochemistry was revealed. [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	1570-1578
Number of pages	9
Journal	Nano Research
Volume	15
Issue number	2
DOIs	https://doi.org/10.1007/s12274-021-3703-6
Publication status	Published - Feb 2022

Keywords

TiNbO
in-situ gas reduction
lithium-ion hybrid capacitor
ordered defect
pseudocapacitance

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10.1007/s12274-021-3703-6

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title = "Orderly defective superstructure for enhanced pseudocapacitive storage in titanium niobium oxide",

abstract = "Artificial defect engineering in transition metal oxides is of important terms for numerous applications. In the present work, we proposed an in-situ gas reduction strategy to introduce ordered defects into titanium niobium oxide embedding on vapor grew carbon fibers (Ti2Nb10O29−x@VGCFs). High-resolution transmission electron microscopy (HRTEM) and fast Fourier transform (FFT) simulation indicate that the ordered oxygen defects locate at interval layers, which leads to a new superstructure in Ti2Nb10O29. The ordered defects could provide extra active sites for lithium-ion storage and modulate ionic migration, resulting an enhanced pseudocapacitive performance. In addition, the excellent structural stability of the superstructure was proved by in-situ HRTEM under a harsh electrochemical process. Our work provides a directly observation of orderly defective superstructure in transition metal oxide, and its functionality on electrochemistry was revealed. [Figure not available: see fulltext.].",

keywords = "TiNbO, in-situ gas reduction, lithium-ion hybrid capacitor, ordered defect, pseudocapacitance",

author = "Le Yang and Jinfeng Zeng and Lei Zhou and Ruiwen Shao and Wellars Utetiwabo and Tufail, \{Muhammad Khurram\} and Saisai Wang and Wen Yang and Jiatao Zhang",

note = "Publisher Copyright: {\textcopyright} 2021, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2022",

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doi = "10.1007/s12274-021-3703-6",

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T1 - Orderly defective superstructure for enhanced pseudocapacitive storage in titanium niobium oxide

AU - Yang, Le

AU - Zeng, Jinfeng

AU - Zhou, Lei

AU - Shao, Ruiwen

AU - Utetiwabo, Wellars

AU - Tufail, Muhammad Khurram

AU - Wang, Saisai

AU - Yang, Wen

AU - Zhang, Jiatao

PY - 2022/2

Y1 - 2022/2

N2 - Artificial defect engineering in transition metal oxides is of important terms for numerous applications. In the present work, we proposed an in-situ gas reduction strategy to introduce ordered defects into titanium niobium oxide embedding on vapor grew carbon fibers (Ti2Nb10O29−x@VGCFs). High-resolution transmission electron microscopy (HRTEM) and fast Fourier transform (FFT) simulation indicate that the ordered oxygen defects locate at interval layers, which leads to a new superstructure in Ti2Nb10O29. The ordered defects could provide extra active sites for lithium-ion storage and modulate ionic migration, resulting an enhanced pseudocapacitive performance. In addition, the excellent structural stability of the superstructure was proved by in-situ HRTEM under a harsh electrochemical process. Our work provides a directly observation of orderly defective superstructure in transition metal oxide, and its functionality on electrochemistry was revealed. [Figure not available: see fulltext.].

AB - Artificial defect engineering in transition metal oxides is of important terms for numerous applications. In the present work, we proposed an in-situ gas reduction strategy to introduce ordered defects into titanium niobium oxide embedding on vapor grew carbon fibers (Ti2Nb10O29−x@VGCFs). High-resolution transmission electron microscopy (HRTEM) and fast Fourier transform (FFT) simulation indicate that the ordered oxygen defects locate at interval layers, which leads to a new superstructure in Ti2Nb10O29. The ordered defects could provide extra active sites for lithium-ion storage and modulate ionic migration, resulting an enhanced pseudocapacitive performance. In addition, the excellent structural stability of the superstructure was proved by in-situ HRTEM under a harsh electrochemical process. Our work provides a directly observation of orderly defective superstructure in transition metal oxide, and its functionality on electrochemistry was revealed. [Figure not available: see fulltext.].

KW - TiNbO

KW - in-situ gas reduction

KW - lithium-ion hybrid capacitor

KW - ordered defect

KW - pseudocapacitance

UR - https://www.scopus.com/pages/publications/85111172911

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DO - 10.1007/s12274-021-3703-6

M3 - Article

AN - SCOPUS:85111172911

SN - 1998-0124

VL - 15

SP - 1570

EP - 1578

JO - Nano Research

JF - Nano Research

IS - 2

ER -

Orderly defective superstructure for enhanced pseudocapacitive storage in titanium niobium oxide

Abstract

Keywords

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