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New ProductHigh Lithium Ion Conducting Solid Electrolyte Lanthanum Lithium Titanate (LLTO) Ceramics for Next Generation Battery

We have successfully developed the perovskite-type lanthanum lithium titanate (La0.57Li0.29TiO3: LLTO) ceramics electrolyte with high total lithium ion conductivity of 5 - 6 × 10-4 Scm-1 at 27℃. The high total conductivity is attributed to the elimination of resistive grain boundary by the grain growth. The bending strength of LLTO ceramics measured by three-point bending test was 79 MPa. This value is close to that of some carbon materials. Permeability of the plate sample was examined by Archimedes method. As a result, water and air don’t pass through the LLTO ceramics. Using the electrolyte as a separator, a rechargeable aqueous type Li-air cell which composed of Li metal / Li organic electrolytes / LLTO ceramics tube / LiOH aq. / O2 carbon electrodes was developed and the stable discharge/charge behavior was confirmed. Consequently, we found that the lithium ion-conducting LLTO ceramics has a promising electrolyte for next generation battery applicable for automobile as well as energy storage.


LLTO ceramics

  • Chemical composition:La0.57Li0.29TiO3 (LLTO)
Shape Size
Plate: flat round type t0.2 mm×φ25 mm
Plate: flat square type t0.5 mm×30 mm×30 mm
t0.2 mm×25 mm×25 mm
Tube closed at one end type Thickness: 1±0.1 mm
External Diameter: 18±0.2 mm
Length: 60 mm

LLTO ceramics

Total lithium ion conductivity of LLTO ceramics at 27-60℃

Temperature( ℃ ) Total lithium ion conductivity ( S/cm )
27 6.8×10-4
40 9.8×10-4
50 1.7×10-3
60 2.6×10-3
Lithium ion conductivity

The mechanical properties & Permeability of LLTO ceramics

  Test Item Method Value
Mechanical properties Three-point bending strength JIS R1601 79 MPa
Fracture toughness JIS R1607 2.00 MPa
Modulus of elasticity (longitudinal) JIS R1602
Resonance method
169 GPa( 1259 Hz )
Modulus of elasticity (transverse) 68.4 GPa( 3782 Hz )
Permeability Water absorption rate JIS 1509-3 < 0.3%
Apparent porosity < 1.0%

LLTO powder

  • Chemical composition:La0.57Li0.29TiO3 (LLTO)
Test Item Value
Tapping Density 1.1g/cm3
Specific Surface Area 0.8m2/g
LLTO powder
< Color : White >

SEM Images

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X-ray Diffraction Pattern

Presentation & Publication Information

Article

Title A rechargeable lithium-air battery using a lithium ion-conducting lanthanum lithium titanate ceramics as an electrolyte separator
Author Yoshiyuki Inaguma, Mamoru Nakashima
Journal J. Power Sources, 228, 250-255 (2013).

*This articlehas been a thing by the collaborative result with Gakushuin University department of science chemistry department Professor Inaguma.

Presentation at a Conference in Japan

Title A rechargeable Lithium-air battery using a lithium ion-conducting lanthanum lithium titanate ceramics as an electrolyte separator
Author **Y. Inaguma, M. Nakashima
Symposium The 38th Symposium on Solid State Ionics in Japan(December 4, 2012, Kyoto)
Title A rechargeable Lithium-air battery using a lithium ion-conducting perovskite-type lanthanum lithium titanate ceramics as an electrolyte separator
Author **Y. Inaguma, M. Nakashima, **K. Ishii, **D. Mori
Conference The Electrochemical Society of Japan 80th Spring Meeting(March 29-31, 2013, Sendai)
Title A rechargeable Lithium-air battery using a lithium ion-conducting perovskite-type lanthanum lithium titanate ceramics as an electrolyte separator
Author **Y. Inaguma, M. Nakashima, **K. Ishii, **D. Mori
Symposium The 54th Battery Symposium in Japan(October 7, 2013, Osaka)

** This presentation has been a thing by the collaborative result with Gakushuin University department of science chemistry department Professor Inaguma, et. al.

Presentation at an International Conference

Title High Lithium-Ion Conducting Solid Electrolyte Lantanum Lithium Titanate Ceramics for Next Generation Battery
Author N. Nakashima, H.Sakai
Conference The 13th International AABC (**) February 4-8, 2013 (Pasadena CA USA)
Title High Lithium-Ion Conducting and High Mechanical Strength Solid Electrolyte Lantanum Lithium Titanate Ceramics for Rechargeable Lithium-air Battery
Author N. Nakashima, H.Sakai
Conference The 4th European AABC June 24-28, 2013 (Strasbourg, France)

**:Advanced Automotive Battery Conference

Publication in Japanese

Title Development of New Material and Analysis for Lithium-air Battery
Author Hideki Sakai
Book 「次世代蓄電池の【最新】材料技術と性能評価」Technical Information Institute Co., Ltd.(December 2013)
Title High Performance Solid Electrolyte LLTO for Next Generation Rechargeable Lithium Ion Battery
Author Hideki Sakai
Book 「LiBの高容量・高耐久化のための電極ー電解液(質)の界面制御技術と解析・評価」Technical Information Institute Co., Ltd.(February 2015)

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