Li-ion Conducting
Solid-state
Electrolyte Ceramics (LLTO™)

Recovering and recycling lithium resources with LLTO™ Making effective use of resources and contributing to a recycling society

LLTO™ (Li-ion conducting solid-state electrolyte ceramics), a representative oxide-based solid-state electrolyte, is highly chemically stable, with a bulk ion conductivity of up to 10-3S/cm. Its anticipated applications include as an ion-conducting membrane for Li+ recovery, and stacked (chip-shaped) solid-state batteries. Leveraging LLTO™’s characteristics, we’re working on development projects that include establishing and perfecting manufacturing technologies for plate-type products.

Li-ion Conducting Solid-state Electrolyte Ceramics (LLTO)

Applications of LLTO™

(1) Solid-state batteries
(2) Air secondary batteries
(3) Recovery of lithium from seawater and waste batteries

LLTO™ ceramics

Chemical formula: La0.57Li0.29TiO3 (LLTO™)
Lithium-ion conductivity: 5.0×10-4S/cm

Shape Size
Square plate 0.5-3.0 mm thick　×　10-50 mm square
Circular plate 0.5-3.0 mm thick　×　φ10-30 mm
LLTO ceramics

Large square plate products exceeding 50mm are currently under development.Large square plate products exceeding 50mm are currently under development.

Li-ion conductivity

Temperature （℃） Li-ion conductivity (S/cm)
27 6.8×10-4
40 9.8×10-4
50 1.7×10-3
60 2.6×10-3
Temperature dependence of ion conductivityTemperature dependence of ion conductivity

Mechanical properties & permeability

Test item Test 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) Resonance method,
JIS R1602		 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 formula: La0.57Li0.29TiO3 (LLTO™)

Product name TP-02N
(ordinary product)		 TP-02F
(pulverized product)		 TP-10F
(pulverized product)
Specific surface area 1.4m2/g 2.5m2/g 10.4m2/g

LLTO is a trademark of Toho Titanium Co., Ltd.

Presentation & publication information

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

*This article is an achievement in collaborative research with Professor Yoshiyuki Inaguma of the Department of Chemistry, Faculty of Science, Gakushuin University.

Title High Lithium-Ion Conducting Solid Electrolyte Lanthanum Lithium Titanate Ceramics for Next Generation Battery
Author Hideki Sakai
Journal Ceramics Japan, Bulletin of the Ceramic Society of Japan, 54[5], pp. 333-336 (2019)
Title High Lithium-Ion Conducting Solid Electrolyte Lanthanum Lithium Titanate Ceramics for Next Generation Battery
Author Hideki Sakai
Journal Bulletin of Japan Electronic Materials Society, 50, pp. 14-18 (2019)
Presentations at conferences/symposiums in Japan
Title A rechargeable Lithium-air battery using a lithium ion-conducting lanthanum lithium titanate ceramics as an electrolyte separator
Speakers Yoshiyuki Inaguma, Mamoru Nakashima
Symposium The 38th Symposium of Solid State Ionics in Japan (December 3 to 5, 2012) at Kyoto Terrsa (Kyoto Pref.)
Title A rechargeable Lithium-air battery using a lithium ion-conducting perovskite-type lanthanum lithium titanate ceramics as an electrolyte separator
Speakers Yoshiyuki Inaguma, Mamoru Nakashima, Kosuke Ishii, Daisuke Mori
Conference 80th Spring Meeting of the Electrochemical Society of Japan (March 29 to 31, 2013) at Tohoku University (Miyagi Pref.)
Title High Lithium-Ion Conducting Solid Electrolyte Lanthanum Lithium Titanate Ceramics for Next Generation Battery
Speaker Hideki Sakai
Conference Ceramics Japan, Bulletin of the Ceramic Society of Japan, 54[5], pp. 333-336 (2019)

*This article is an achievement in collaborative research with Professor Yoshiyuki Inaguma of the Department of Chemistry, Faculty of Science, Gakushuin University.

Presentations at international conferences
Title High Lithium-Ion Conducting Solid Electrolyte Lantanum Lithium Titanate Ceramics for Next Generation Battery
Speakers Mamoru Nakashima, Hideki Sakai, Yoshiyuki Inaguma
Conference The 13th International AABC**, February 4 to 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
Speakers Mamoru Nakashima, Hideki Sakai, Yoshiyuki Inaguma
Conference The 4th European AABC, June 24 to 28, 2013 (Strasbourg, France)

**: Advanced Automotive Battery Conference

Publications in Japanese
Title Development of New Material and Analysis for Lithium-air Battery
Author Hideki Sakai
Book Development of New Material and Analysis for Next-Generation Storage Batteries (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 Lithium-Ion Conducting Solid Electrolyte Lanthanum Lithium Titanate Ceramics for Next Generation Battery
Author Hideki Sakai
Book Interface Control Technology of Electrodes – Electrolytic Solution (Electrolytes) for Higher Capacity and Durability of LiB, and Analysis and Evaluation (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)
Title High Lithium-Ion Conducting Solid Electrolyte Lanthanum Lithium Titanate Ceramics for Next Generation Battery
Author Hideki Sakai
Book Technology and Material for Improvement of Ion Conductivity of Solid-State Batteries, and Development of Manufacturing Process (全固体電池のイオン伝導性向上技術と材料、製造プロセスの開発), Technical Information Institute Co., Ltd., pp. 70-74 (2017)
Title Electrochemical Measurement of Ceramics Solid Electrolytes and Evaluation Cases
Author Hideki Sakai
Book Data Analysis Methods for Electrochemical and Impedance Measurement, and Example Cases (電気化学・インピーダンス測定のデータ解析手法と事例集), Technical Information Institute Co., Ltd., pp. 250-254 (2018)
Title Enhancement of Oxide Solid-Electrolyte LLTO
Author Hideki Sakai
Book Solid State Batteries: Fundamentals and Frontiers, CMC Research Ltd., pp. 209-214 (2018)
Title Preparation of Oxide Electrolyte Materials
Author Hideki Sakai
Book Current Situation of Development of Solid-State Batteries and Approaches to Industrialization (全固体電池開発の現状と産業化へのアプローチ), Johokiko, pp. 51-58 (2018)
Title Charge-discharge Characteristics for LIB Materials Titanium Oxide Compound
Author Hideki Sakai
Book Quick Charging Performance & Durability for Automotive Li-Ion Batteries and Market Trend, CMC Research Ltd., pp. 79-92 (2019)
Title Enhancement of Oxide Solid-Electrolyte LLTO
Author Hideki Sakai
Book Reports on Next-Generation Secondary Battery Technologies and Market Trend (次世代二次電池技術・市場動向レポート集), AndTech Corporation, Ltd., pp. 75-83 (2021)

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