Clarifying the charging induced nucleation in glass anode of Li-ion batteries and its enhanced performances

Y.F. Zhang, P.X. Wang, G.D. Li, J.H. Fan, Chengwei Gao, Z.Y. Wang, Yuanzheng Yue

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

7 Citationer (Scopus)

Resumé

It was recently discovered that nanocrystals could be generated in glass anodes by Li-ion insertion, and thereby the cycling stability of Li-ion batteries was enhanced. Here we reveal the origins of both the nanocrystal formation and the enhancement of battery performances by exploring phase transitions, redox reactions, and structural heterogeneity in glass anodes. We infer that Li + ions interact with the higher energy domains of structural network during discharging/charging, and some of the Li ions are incorporated into the structural network, and thereby the potential energy is lowered through nanocrystal formation. Upon 5000 discharging/charging cycles at a high current density of 1 A g −1 , the nanocrystals in the 40TeO 2 –60V 2 O 5 glass were identified to be γ-Li 3 VO 4 . Owing to the metastable nature of the γ-Li 3 VO 4 phase, the glass anode becomes electrochemically active and highly ionic conductive. Simultaneously, the cycling stability is greatly enhanced by the nanostructured glass since the nanocrystals could suppress the propagation of micro-cracks generated by volume changes in glass matrix.

OriginalsprogEngelsk
TidsskriftNano Energy
Vol/bind57
Sider (fra-til)592–599
Antal sider8
ISSN2211-2855
DOI
StatusUdgivet - 1 mar. 2019

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Anodes
Nucleation
Nanocrystals
Glass
Ions
Redox reactions
Potential energy
Lithium-ion batteries
Current density
Phase transitions
Cracks

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abstract = "It was recently discovered that nanocrystals could be generated in glass anodes by Li-ion insertion, and thereby the cycling stability of Li-ion batteries was enhanced. Here we reveal the origins of both the nanocrystal formation and the enhancement of battery performances by exploring phase transitions, redox reactions, and structural heterogeneity in glass anodes. We infer that Li + ions interact with the higher energy domains of structural network during discharging/charging, and some of the Li ions are incorporated into the structural network, and thereby the potential energy is lowered through nanocrystal formation. Upon 5000 discharging/charging cycles at a high current density of 1 A g −1 , the nanocrystals in the 40TeO 2 –60V 2 O 5 glass were identified to be γ-Li 3 VO 4 . Owing to the metastable nature of the γ-Li 3 VO 4 phase, the glass anode becomes electrochemically active and highly ionic conductive. Simultaneously, the cycling stability is greatly enhanced by the nanostructured glass since the nanocrystals could suppress the propagation of micro-cracks generated by volume changes in glass matrix.",
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Clarifying the charging induced nucleation in glass anode of Li-ion batteries and its enhanced performances. / Zhang, Y.F.; Wang, P.X.; Li, G.D.; Fan, J.H.; Gao, Chengwei; Wang, Z.Y.; Yue, Yuanzheng.

I: Nano Energy, Bind 57, 01.03.2019, s. 592–599.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Clarifying the charging induced nucleation in glass anode of Li-ion batteries and its enhanced performances

AU - Zhang, Y.F.

AU - Wang, P.X.

AU - Li, G.D.

AU - Fan, J.H.

AU - Gao, Chengwei

AU - Wang, Z.Y.

AU - Yue, Yuanzheng

PY - 2019/3/1

Y1 - 2019/3/1

N2 - It was recently discovered that nanocrystals could be generated in glass anodes by Li-ion insertion, and thereby the cycling stability of Li-ion batteries was enhanced. Here we reveal the origins of both the nanocrystal formation and the enhancement of battery performances by exploring phase transitions, redox reactions, and structural heterogeneity in glass anodes. We infer that Li + ions interact with the higher energy domains of structural network during discharging/charging, and some of the Li ions are incorporated into the structural network, and thereby the potential energy is lowered through nanocrystal formation. Upon 5000 discharging/charging cycles at a high current density of 1 A g −1 , the nanocrystals in the 40TeO 2 –60V 2 O 5 glass were identified to be γ-Li 3 VO 4 . Owing to the metastable nature of the γ-Li 3 VO 4 phase, the glass anode becomes electrochemically active and highly ionic conductive. Simultaneously, the cycling stability is greatly enhanced by the nanostructured glass since the nanocrystals could suppress the propagation of micro-cracks generated by volume changes in glass matrix.

AB - It was recently discovered that nanocrystals could be generated in glass anodes by Li-ion insertion, and thereby the cycling stability of Li-ion batteries was enhanced. Here we reveal the origins of both the nanocrystal formation and the enhancement of battery performances by exploring phase transitions, redox reactions, and structural heterogeneity in glass anodes. We infer that Li + ions interact with the higher energy domains of structural network during discharging/charging, and some of the Li ions are incorporated into the structural network, and thereby the potential energy is lowered through nanocrystal formation. Upon 5000 discharging/charging cycles at a high current density of 1 A g −1 , the nanocrystals in the 40TeO 2 –60V 2 O 5 glass were identified to be γ-Li 3 VO 4 . Owing to the metastable nature of the γ-Li 3 VO 4 phase, the glass anode becomes electrochemically active and highly ionic conductive. Simultaneously, the cycling stability is greatly enhanced by the nanostructured glass since the nanocrystals could suppress the propagation of micro-cracks generated by volume changes in glass matrix.

KW - Anode

KW - Charging induced nucleation

KW - Li-ion battery

KW - γ-Li VO nanocrystal

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U2 - 10.1016/j.nanoen.2018.12.088

DO - 10.1016/j.nanoen.2018.12.088

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VL - 57

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EP - 599

JO - Nano Energy

JF - Nano Energy

SN - 2211-2855

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