Reducing the Charge Carrier Transport Barrier in Functionally Layer-Graded Electrodes

Yanyan Zhang; Oleksandr I. Malyi; Yuxin Tang; Jiaqi Wei; Zhiqiang Zhu; Huarong Xia; Wenlong Li; Jia Guo; Xinran Zhou; Zhong Chen; Clas Persson; Xiaodong Chen

doi:10.1002/anie.201707883

Reducing the Charge Carrier Transport Barrier in Functionally Layer-Graded Electrodes

Yanyan Zhang, Oleksandr I. Malyi, Yuxin Tang, Jiaqi Wei, Zhiqiang Zhu, Huarong Xia, Wenlong Li, Jia Guo, Xinran Zhou, Zhong Chen, Clas Persson, Xiaodong Chen^*

^*Corresponding author for this work

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

97 Citations (Scopus)

Abstract

Lithium-ion batteries (LIBs) are primary energy storage devices to power consumer electronics and electric vehicles, but their capacity is dramatically decreased at ultrahigh charging/discharging rates. This mainly originates from a high Li-ion/electron transport barrier within a traditional electrode, resulting in reaction polarization issues. To address this limitation, a functionally layer-graded electrode was designed and fabricated to decrease the charge carrier transport barrier within the electrode. As a proof-of-concept, functionally layer-graded electrodes composing of TiO₂(B) and reduced graphene oxide (RGO) exhibit a remarkable capacity of 128 mAh g⁻¹ at a high charging/discharging rate of 20 C (6.7 A g⁻¹), which is much higher than that of a traditionally homogeneous electrode (74 mAh g⁻¹) with the same composition. This is evidenced by the improvement of effective Li ion diffusivity as well as electronic conductivity in the functionally layer-graded electrodes.

Original language	English
Pages (from-to)	14847-14852
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	56
Issue number	47
DOIs	https://doi.org/10.1002/anie.201707883
Publication status	Published - Nov 20 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

ASJC Scopus Subject Areas

Catalysis
General Chemistry

Keywords

charge carrier barrier
functionally graded electrodes
high charging rates
lithium-ion batteries
TiO(B)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/anie.201707883

Cite this

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title = "Reducing the Charge Carrier Transport Barrier in Functionally Layer-Graded Electrodes",

abstract = "Lithium-ion batteries (LIBs) are primary energy storage devices to power consumer electronics and electric vehicles, but their capacity is dramatically decreased at ultrahigh charging/discharging rates. This mainly originates from a high Li-ion/electron transport barrier within a traditional electrode, resulting in reaction polarization issues. To address this limitation, a functionally layer-graded electrode was designed and fabricated to decrease the charge carrier transport barrier within the electrode. As a proof-of-concept, functionally layer-graded electrodes composing of TiO2(B) and reduced graphene oxide (RGO) exhibit a remarkable capacity of 128 mAh g−1 at a high charging/discharging rate of 20 C (6.7 A g−1), which is much higher than that of a traditionally homogeneous electrode (74 mAh g−1) with the same composition. This is evidenced by the improvement of effective Li ion diffusivity as well as electronic conductivity in the functionally layer-graded electrodes.",

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author = "Yanyan Zhang and Malyi, \{Oleksandr I.\} and Yuxin Tang and Jiaqi Wei and Zhiqiang Zhu and Huarong Xia and Wenlong Li and Jia Guo and Xinran Zhou and Zhong Chen and Clas Persson and Xiaodong Chen",

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doi = "10.1002/anie.201707883",

language = "English",

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T1 - Reducing the Charge Carrier Transport Barrier in Functionally Layer-Graded Electrodes

AU - Zhang, Yanyan

AU - Malyi, Oleksandr I.

AU - Tang, Yuxin

AU - Wei, Jiaqi

AU - Zhu, Zhiqiang

AU - Xia, Huarong

AU - Li, Wenlong

AU - Guo, Jia

AU - Zhou, Xinran

AU - Chen, Zhong

AU - Persson, Clas

AU - Chen, Xiaodong

PY - 2017/11/20

Y1 - 2017/11/20

N2 - Lithium-ion batteries (LIBs) are primary energy storage devices to power consumer electronics and electric vehicles, but their capacity is dramatically decreased at ultrahigh charging/discharging rates. This mainly originates from a high Li-ion/electron transport barrier within a traditional electrode, resulting in reaction polarization issues. To address this limitation, a functionally layer-graded electrode was designed and fabricated to decrease the charge carrier transport barrier within the electrode. As a proof-of-concept, functionally layer-graded electrodes composing of TiO2(B) and reduced graphene oxide (RGO) exhibit a remarkable capacity of 128 mAh g−1 at a high charging/discharging rate of 20 C (6.7 A g−1), which is much higher than that of a traditionally homogeneous electrode (74 mAh g−1) with the same composition. This is evidenced by the improvement of effective Li ion diffusivity as well as electronic conductivity in the functionally layer-graded electrodes.

AB - Lithium-ion batteries (LIBs) are primary energy storage devices to power consumer electronics and electric vehicles, but their capacity is dramatically decreased at ultrahigh charging/discharging rates. This mainly originates from a high Li-ion/electron transport barrier within a traditional electrode, resulting in reaction polarization issues. To address this limitation, a functionally layer-graded electrode was designed and fabricated to decrease the charge carrier transport barrier within the electrode. As a proof-of-concept, functionally layer-graded electrodes composing of TiO2(B) and reduced graphene oxide (RGO) exhibit a remarkable capacity of 128 mAh g−1 at a high charging/discharging rate of 20 C (6.7 A g−1), which is much higher than that of a traditionally homogeneous electrode (74 mAh g−1) with the same composition. This is evidenced by the improvement of effective Li ion diffusivity as well as electronic conductivity in the functionally layer-graded electrodes.

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KW - high charging rates

KW - lithium-ion batteries

KW - TiO(B)

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Reducing the Charge Carrier Transport Barrier in Functionally Layer-Graded Electrodes

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

UN SDGs

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