Electric field effect in a Co                         3                         O                         4                         /TiO                         2                          p-n junction for superior lithium-ion storage

Huabin Kong; Chunshuang Yan; Chade Lv; Jian Pei; Gang Chen

doi:10.1039/c9qm00007k

Electric field effect in a Co ₃ O ₄ /TiO ₂ p-n junction for superior lithium-ion storage

Huabin Kong
, Chunshuang Yan
, Chade Lv
, Jian Pei
, Gang Chen

School of Chemistry and Chemical Engineering, Harbin Institute of Technology

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

25 Scopus citations

Abstract

Constructing heterojunctions holds huge potential for tuning material properties owing to the built-in charge transfer driving force, which is beneficial for the migration behavior of Li-ions. While both the electrochemistry and heterojunctions of alloying-type anodes have been studied, the role of heterojunctions in improving the Li-ion storage performance of conversion-type anodes is unclear. In this work, porous Co ₃ O ₄ /TiO ₂ nanosheets (P-Co ₃ O ₄ /TiO ₂ NSs) were fabricated to successfully construct a p-n junction by coating n-type TiO ₂ on p-type Co ₃ O ₄ NSs. The formation of the built-in electric field in the p-n junction significantly facilitates the charge transfer kinetics and the amorphous TiO ₂ layer accommodates the volume change of the Co ₃ O ₄ NSs, manifesting the superiority of applying the p-n junction in a conversion-type anode for the first time. When evaluated as lithium-ion battery (LIB) anodes, the P-Co ₃ O ₄ /TiO ₂ NSs deliver high specific capacity, long-term cycling stability and remarkable rate capability (801 mA h g ^-1 after 1600 cycles at a current density of 2 A g ^-1 ).

Original language	English
Pages (from-to)	909-915
Number of pages	7
Journal	Materials Chemistry Frontiers
Volume	3
Issue number	5
DOIs	https://doi.org/10.1039/c9qm00007k
State	Published - May 2019
Externally published	Yes

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SDG 7 Affordable and Clean Energy

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10.1039/c9qm00007k

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Kong, H., Yan, C., Lv, C., Pei, J., & Chen, G. (2019). Electric field effect in a Co ₃ O ₄ /TiO ₂ p-n junction for superior lithium-ion storage Materials Chemistry Frontiers, 3(5), 909-915. https://doi.org/10.1039/c9qm00007k

Kong, Huabin ; Yan, Chunshuang ; Lv, Chade et al. / Electric field effect in a Co ₃ O ₄ /TiO ₂ p-n junction for superior lithium-ion storage In: Materials Chemistry Frontiers. 2019 ; Vol. 3, No. 5. pp. 909-915.

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title = " Electric field effect in a Co 3 O 4 /TiO 2 p-n junction for superior lithium-ion storage ",

abstract = " Constructing heterojunctions holds huge potential for tuning material properties owing to the built-in charge transfer driving force, which is beneficial for the migration behavior of Li-ions. While both the electrochemistry and heterojunctions of alloying-type anodes have been studied, the role of heterojunctions in improving the Li-ion storage performance of conversion-type anodes is unclear. In this work, porous Co 3 O 4 /TiO 2 nanosheets (P-Co 3 O 4 /TiO 2 NSs) were fabricated to successfully construct a p-n junction by coating n-type TiO 2 on p-type Co 3 O 4 NSs. The formation of the built-in electric field in the p-n junction significantly facilitates the charge transfer kinetics and the amorphous TiO 2 layer accommodates the volume change of the Co 3 O 4 NSs, manifesting the superiority of applying the p-n junction in a conversion-type anode for the first time. When evaluated as lithium-ion battery (LIB) anodes, the P-Co 3 O 4 /TiO 2 NSs deliver high specific capacity, long-term cycling stability and remarkable rate capability (801 mA h g -1 after 1600 cycles at a current density of 2 A g -1 ).",

author = "Huabin Kong and Chunshuang Yan and Chade Lv and Jian Pei and Gang Chen",

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Kong, H, Yan, C , Lv, C, Pei, J & Chen, G 2019, ' Electric field effect in a Co ₃ O ₄ /TiO ₂ p-n junction for superior lithium-ion storage ', Materials Chemistry Frontiers, vol. 3, no. 5, pp. 909-915. https://doi.org/10.1039/c9qm00007k

Electric field effect in a Co ₃ O ₄ /TiO ₂ p-n junction for superior lithium-ion storage . / Kong, Huabin; Yan, Chunshuang ; Lv, Chade et al.
In: Materials Chemistry Frontiers, Vol. 3, No. 5, 05.2019, p. 909-915.

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

TY - JOUR

T1 - Electric field effect in a Co 3 O 4 /TiO 2 p-n junction for superior lithium-ion storage

AU - Kong, Huabin

AU - Yan, Chunshuang

AU - Lv, Chade

AU - Pei, Jian

AU - Chen, Gang

PY - 2019/5

Y1 - 2019/5

N2 - Constructing heterojunctions holds huge potential for tuning material properties owing to the built-in charge transfer driving force, which is beneficial for the migration behavior of Li-ions. While both the electrochemistry and heterojunctions of alloying-type anodes have been studied, the role of heterojunctions in improving the Li-ion storage performance of conversion-type anodes is unclear. In this work, porous Co 3 O 4 /TiO 2 nanosheets (P-Co 3 O 4 /TiO 2 NSs) were fabricated to successfully construct a p-n junction by coating n-type TiO 2 on p-type Co 3 O 4 NSs. The formation of the built-in electric field in the p-n junction significantly facilitates the charge transfer kinetics and the amorphous TiO 2 layer accommodates the volume change of the Co 3 O 4 NSs, manifesting the superiority of applying the p-n junction in a conversion-type anode for the first time. When evaluated as lithium-ion battery (LIB) anodes, the P-Co 3 O 4 /TiO 2 NSs deliver high specific capacity, long-term cycling stability and remarkable rate capability (801 mA h g -1 after 1600 cycles at a current density of 2 A g -1 ).

AB - Constructing heterojunctions holds huge potential for tuning material properties owing to the built-in charge transfer driving force, which is beneficial for the migration behavior of Li-ions. While both the electrochemistry and heterojunctions of alloying-type anodes have been studied, the role of heterojunctions in improving the Li-ion storage performance of conversion-type anodes is unclear. In this work, porous Co 3 O 4 /TiO 2 nanosheets (P-Co 3 O 4 /TiO 2 NSs) were fabricated to successfully construct a p-n junction by coating n-type TiO 2 on p-type Co 3 O 4 NSs. The formation of the built-in electric field in the p-n junction significantly facilitates the charge transfer kinetics and the amorphous TiO 2 layer accommodates the volume change of the Co 3 O 4 NSs, manifesting the superiority of applying the p-n junction in a conversion-type anode for the first time. When evaluated as lithium-ion battery (LIB) anodes, the P-Co 3 O 4 /TiO 2 NSs deliver high specific capacity, long-term cycling stability and remarkable rate capability (801 mA h g -1 after 1600 cycles at a current density of 2 A g -1 ).

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Kong H, Yan C , Lv C, Pei J, Chen G. Electric field effect in a Co ₃ O ₄ /TiO ₂ p-n junction for superior lithium-ion storage Materials Chemistry Frontiers. 2019 May;3(5):909-915. doi: 10.1039/c9qm00007k

Electric field effect in a Co ₃ O ₄ /TiO ₂ p-n junction for superior lithium-ion storage

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