Orientation dependence of microstructure and electrochemical properties of LiCoO2 cathode films deposited on single-crystalline La 2/3-xLi3xTiO3

Kengo Goto; Kyosuke Kishida; Yuji Yamaguchi; Norihiko L. Okamoto; Katsushi Tanaka; Haruyuki Inui; Shunji Takekawa; Yasutoshi Lriyama; Zempachi Ogumi

Orientation dependence of microstructure and electrochemical properties of LiCoO₂ cathode films deposited on single-crystalline La _2/3-xLi_3xTiO₃

Kengo Goto, Kyosuke Kishida, Yuji Yamaguchi, Norihiko L. Okamoto, Katsushi Tanaka, Haruyuki Inui, Shunji Takekawa, Yasutoshi Lriyama, Zempachi Ogumi

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Two different types of single-crystalline lithium lanthanum titanate (LLT) I LiCoO₂ assemblies were prepared by depositing HT-LiCoO₂ on the LLT surfaces of(1 10)_p and (112)_p to investigate the effects of the orientation dependence of microstructures on the electrochemical properties of the assemblies. Cyclic voltammetry shows that the (110)_p assembly exhibits very small peak separation between anodic and cathodic reactions, while the peak separation is considerably large in the case of the (112)_p assembly. In the HT-LiCoO₂ thin film cathode formed epitaxially on LLT, four differently-oriented domains can be formed under the orientation relationships of (11 1)_p//(000l) LiCoO₂, and (110)_p//(1l2O)LiCoO₂ between LLT (macroscopically cubic) and HT-LiCoO₂ (rhombohedral). The HT-LiCoO₂ domains with their layered structure aligned perpendicular to the interface are dominantly formed for the (110)_p assembly, whereas those with the layered structure inclined about 20° against the interface are dominantly grown for the (1l2) assembly. Such a selective growth behavior of the HT-LiCoO₂ on the LLT surface is considered to play an important role for the observed orientation dependence of the electrochemical properties of the LLT/LiCoO₂ assemblies.

Original language	English
Title of host publication	Materials Research Society Symposium Proceedings - Solid-State Ionics - 2008
Pages	125-130
Number of pages	6
Publication status	Published - 2009 Sep 25
Externally published	Yes
Event	Solid-State Ionics 2008 - 2008 MRS Fall Meeting - Boston, MA, United States Duration: 2008 Dec 1 → 2008 Dec 5

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1126
ISSN (Print)	0272-9172

Other

Other	Solid-State Ionics 2008 - 2008 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	08/12/1 → 08/12/5

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

Goto, K., Kishida, K., Yamaguchi, Y., Okamoto, N. L., Tanaka, K., Inui, H., Takekawa, S., Lriyama, Y., & Ogumi, Z. (2009). Orientation dependence of microstructure and electrochemical properties of LiCoO₂ cathode films deposited on single-crystalline La _2/3-xLi_3xTiO₃. In Materials Research Society Symposium Proceedings - Solid-State Ionics - 2008 (pp. 125-130). (Materials Research Society Symposium Proceedings; Vol. 1126).

Orientation dependence of microstructure and electrochemical properties of LiCoO₂ cathode films deposited on single-crystalline La _2/3-xLi_3xTiO₃. / Goto, Kengo; Kishida, Kyosuke; Yamaguchi, Yuji; Okamoto, Norihiko L.; Tanaka, Katsushi; Inui, Haruyuki; Takekawa, Shunji; Lriyama, Yasutoshi; Ogumi, Zempachi.

Materials Research Society Symposium Proceedings - Solid-State Ionics - 2008. 2009. p. 125-130 (Materials Research Society Symposium Proceedings; Vol. 1126).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Goto, K, Kishida, K, Yamaguchi, Y, Okamoto, NL, Tanaka, K, Inui, H, Takekawa, S, Lriyama, Y & Ogumi, Z 2009, Orientation dependence of microstructure and electrochemical properties of LiCoO₂ cathode films deposited on single-crystalline La _2/3-xLi_3xTiO₃. in Materials Research Society Symposium Proceedings - Solid-State Ionics - 2008. Materials Research Society Symposium Proceedings, vol. 1126, pp. 125-130, Solid-State Ionics 2008 - 2008 MRS Fall Meeting, Boston, MA, United States, 08/12/1.

Goto, Kengo ; Kishida, Kyosuke ; Yamaguchi, Yuji ; Okamoto, Norihiko L. ; Tanaka, Katsushi ; Inui, Haruyuki ; Takekawa, Shunji ; Lriyama, Yasutoshi ; Ogumi, Zempachi. / Orientation dependence of microstructure and electrochemical properties of LiCoO₂ cathode films deposited on single-crystalline La _2/3-xLi_3xTiO₃. Materials Research Society Symposium Proceedings - Solid-State Ionics - 2008. 2009. pp. 125-130 (Materials Research Society Symposium Proceedings).

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title = "Orientation dependence of microstructure and electrochemical properties of LiCoO2 cathode films deposited on single-crystalline La 2/3-xLi3xTiO3",

abstract = "Two different types of single-crystalline lithium lanthanum titanate (LLT) I LiCoO2 assemblies were prepared by depositing HT-LiCoO2 on the LLT surfaces of(1 10)p and (112)p to investigate the effects of the orientation dependence of microstructures on the electrochemical properties of the assemblies. Cyclic voltammetry shows that the (110)p assembly exhibits very small peak separation between anodic and cathodic reactions, while the peak separation is considerably large in the case of the (112)p assembly. In the HT-LiCoO2 thin film cathode formed epitaxially on LLT, four differently-oriented domains can be formed under the orientation relationships of (11 1)p//(000l) LiCoO2, and (110)p//(1l2O)LiCoO2 between LLT (macroscopically cubic) and HT-LiCoO2 (rhombohedral). The HT-LiCoO2 domains with their layered structure aligned perpendicular to the interface are dominantly formed for the (110)p assembly, whereas those with the layered structure inclined about 20° against the interface are dominantly grown for the (1l2) assembly. Such a selective growth behavior of the HT-LiCoO2 on the LLT surface is considered to play an important role for the observed orientation dependence of the electrochemical properties of the LLT/LiCoO2 assemblies.",

author = "Kengo Goto and Kyosuke Kishida and Yuji Yamaguchi and Okamoto, {Norihiko L.} and Katsushi Tanaka and Haruyuki Inui and Shunji Takekawa and Yasutoshi Lriyama and Zempachi Ogumi",

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AU - Okamoto, Norihiko L.

AU - Tanaka, Katsushi

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N2 - Two different types of single-crystalline lithium lanthanum titanate (LLT) I LiCoO2 assemblies were prepared by depositing HT-LiCoO2 on the LLT surfaces of(1 10)p and (112)p to investigate the effects of the orientation dependence of microstructures on the electrochemical properties of the assemblies. Cyclic voltammetry shows that the (110)p assembly exhibits very small peak separation between anodic and cathodic reactions, while the peak separation is considerably large in the case of the (112)p assembly. In the HT-LiCoO2 thin film cathode formed epitaxially on LLT, four differently-oriented domains can be formed under the orientation relationships of (11 1)p//(000l) LiCoO2, and (110)p//(1l2O)LiCoO2 between LLT (macroscopically cubic) and HT-LiCoO2 (rhombohedral). The HT-LiCoO2 domains with their layered structure aligned perpendicular to the interface are dominantly formed for the (110)p assembly, whereas those with the layered structure inclined about 20° against the interface are dominantly grown for the (1l2) assembly. Such a selective growth behavior of the HT-LiCoO2 on the LLT surface is considered to play an important role for the observed orientation dependence of the electrochemical properties of the LLT/LiCoO2 assemblies.

AB - Two different types of single-crystalline lithium lanthanum titanate (LLT) I LiCoO2 assemblies were prepared by depositing HT-LiCoO2 on the LLT surfaces of(1 10)p and (112)p to investigate the effects of the orientation dependence of microstructures on the electrochemical properties of the assemblies. Cyclic voltammetry shows that the (110)p assembly exhibits very small peak separation between anodic and cathodic reactions, while the peak separation is considerably large in the case of the (112)p assembly. In the HT-LiCoO2 thin film cathode formed epitaxially on LLT, four differently-oriented domains can be formed under the orientation relationships of (11 1)p//(000l) LiCoO2, and (110)p//(1l2O)LiCoO2 between LLT (macroscopically cubic) and HT-LiCoO2 (rhombohedral). The HT-LiCoO2 domains with their layered structure aligned perpendicular to the interface are dominantly formed for the (110)p assembly, whereas those with the layered structure inclined about 20° against the interface are dominantly grown for the (1l2) assembly. Such a selective growth behavior of the HT-LiCoO2 on the LLT surface is considered to play an important role for the observed orientation dependence of the electrochemical properties of the LLT/LiCoO2 assemblies.

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