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 | t0.2～3.0 mm×φ10～30 mm |
| Plate: flat square type | t0.2～3.0 mm×φ10～50 mm |
| Tube closed at one end type | Thickness: 1±0.1 mm External Diameter: 18±0.2 mm Length: 60 mm |
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 |
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・m1/2 | |
| 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 |
SEM Images
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x 200 -
x 1000
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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