Self-organized core-shell structure for high-power electrode in solid-state lithium batteries

Xiaoxiong Xu; Kazunori Takada; Ken Watanabe; Isao Sakaguchi; Kosho Akatsuka; Bui T. Hang; Tsuyoshi Ohnishi; Takayoshi Sasaki

doi:10.1021/cm103665w

Self-organized core-shell structure for high-power electrode in solid-state lithium batteries

Xiaoxiong Xu, Kazunori Takada, Ken Watanabe, Isao Sakaguchi, Kosho Akatsuka, Bui T. Hang, Tsuyoshi Ohnishi, Takayoshi Sasaki

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

60 Citations (Scopus)

Abstract

Effect of Al-substitution for Co on the electrode properties of LiCoO ₂ is investigated in a sulfide solid electrolyte. The substitution decreases the electrode resistance and thus improves the high-rate capability. Investigation of the post-annealing effect revealed that, although the crystal structure or morphology of the LiAl_xCo_1-xO₂ are not significantly changed by the post-annealing, the electrode properties are highly dependent on the post-annealing conditions, which suggests that the improvement in high-rate capability comes from the change in surface structure of the LiAl_xCo_1-xO₂ particles (i.e., self-organized core-shell structure). The Al-substituted LiCoO₂ obtained through this study delivers a discharge capacity of 115 mAh g ^-1 at 1 C and 84 mAh g^-1 even at a high discharge rate of 5 C at 25 °C, which is one of the highest rate capabilities observed in solid-state cells.

Original language	English
Pages (from-to)	3798-3804
Number of pages	7
Journal	Chemistry of Materials
Volume	23
Issue number	17
DOIs	https://doi.org/10.1021/cm103665w
Publication status	Published - Sept 13 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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10.1021/cm103665w

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title = "Self-organized core-shell structure for high-power electrode in solid-state lithium batteries",

abstract = "Effect of Al-substitution for Co on the electrode properties of LiCoO 2 is investigated in a sulfide solid electrolyte. The substitution decreases the electrode resistance and thus improves the high-rate capability. Investigation of the post-annealing effect revealed that, although the crystal structure or morphology of the LiAlxCo1-xO2 are not significantly changed by the post-annealing, the electrode properties are highly dependent on the post-annealing conditions, which suggests that the improvement in high-rate capability comes from the change in surface structure of the LiAlxCo1-xO2 particles (i.e., self-organized core-shell structure). The Al-substituted LiCoO2 obtained through this study delivers a discharge capacity of 115 mAh g -1 at 1 C and 84 mAh g-1 even at a high discharge rate of 5 C at 25 °C, which is one of the highest rate capabilities observed in solid-state cells.",

author = "Xiaoxiong Xu and Kazunori Takada and Ken Watanabe and Isao Sakaguchi and Kosho Akatsuka and Hang, {Bui T.} and Tsuyoshi Ohnishi and Takayoshi Sasaki",

year = "2011",

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doi = "10.1021/cm103665w",

language = "English",

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pages = "3798--3804",

journal = "Chemistry of Materials",

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TY - JOUR

T1 - Self-organized core-shell structure for high-power electrode in solid-state lithium batteries

AU - Xu, Xiaoxiong

AU - Takada, Kazunori

AU - Watanabe, Ken

AU - Sakaguchi, Isao

AU - Akatsuka, Kosho

AU - Hang, Bui T.

AU - Ohnishi, Tsuyoshi

AU - Sasaki, Takayoshi

PY - 2011/9/13

Y1 - 2011/9/13

N2 - Effect of Al-substitution for Co on the electrode properties of LiCoO 2 is investigated in a sulfide solid electrolyte. The substitution decreases the electrode resistance and thus improves the high-rate capability. Investigation of the post-annealing effect revealed that, although the crystal structure or morphology of the LiAlxCo1-xO2 are not significantly changed by the post-annealing, the electrode properties are highly dependent on the post-annealing conditions, which suggests that the improvement in high-rate capability comes from the change in surface structure of the LiAlxCo1-xO2 particles (i.e., self-organized core-shell structure). The Al-substituted LiCoO2 obtained through this study delivers a discharge capacity of 115 mAh g -1 at 1 C and 84 mAh g-1 even at a high discharge rate of 5 C at 25 °C, which is one of the highest rate capabilities observed in solid-state cells.

AB - Effect of Al-substitution for Co on the electrode properties of LiCoO 2 is investigated in a sulfide solid electrolyte. The substitution decreases the electrode resistance and thus improves the high-rate capability. Investigation of the post-annealing effect revealed that, although the crystal structure or morphology of the LiAlxCo1-xO2 are not significantly changed by the post-annealing, the electrode properties are highly dependent on the post-annealing conditions, which suggests that the improvement in high-rate capability comes from the change in surface structure of the LiAlxCo1-xO2 particles (i.e., self-organized core-shell structure). The Al-substituted LiCoO2 obtained through this study delivers a discharge capacity of 115 mAh g -1 at 1 C and 84 mAh g-1 even at a high discharge rate of 5 C at 25 °C, which is one of the highest rate capabilities observed in solid-state cells.

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DO - 10.1021/cm103665w

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EP - 3804

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 17

ER -

Self-organized core-shell structure for high-power electrode in solid-state lithium batteries

Abstract

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