High ionic conductivity in lithium lanthanum titanate

Inaguma, Yoshiyuki; Chen, Liquan; Itoh, Makoto; Nakamura, Tetsurō; Uchida, Takashi; Ikuta, Hiromasa; Wakihara, Masataka

doi:10.1016/0038-1098(93)90841-a

Cited by 1,435 publications

(1,081 citation statements)

References 9 publications

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“…Furthermore, Li 2 O is formed upon annealing and lithium is extracted from the LLTO phase, resulting in less control over the stoichiometry of the LLTO material and, consequently, the ionic conductivity. [ 112 ] The electronic conductivity of LLTO is slightly higher (10 − 8 -10 − 9 S ⋅ cm − 1 ) [ 105 ] than that of, for example, LiNbO 3 or LiTaO 3 . Therefore, a thicker electrolyte layer is required in a solid-state battery to obtain a similar selfdischarge rate.…”

Section: Vanadium Oxidesmentioning

confidence: 98%

All‐Solid‐State Lithium‐Ion Microbatteries: A Review of Various Three‐Dimensional Concepts

Oudenhoven

Baggetto

Notten

2010

Advanced Energy Materials

691

638

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With the increasing importance of wireless microelectronic devices the need for on-board power supplies is evidently also increasing. Possible candidates for microenergy storage devices are planar all-solid-state Li-ion microbatteries, which are currently under development by several start-up companies. However, to increase the energy density of these microbatteries further and to ensure a high power delivery, three-dimensional (3D) designs are essential. Therefore, several concepts have been proposed for the design of 3D microbatteries and these are reviewed. In addition, an overview is given of the various electrode and electrolyte materials that are suitable for 3D all-solidstate microbatteries. Furthermore, methods are presented to produce fi lms of these materials on a nano-and microscale.www.MaterialsViews.com REVIEW www.advenergymat.de

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Section: Vanadium Oxidesmentioning

confidence: 98%

All‐Solid‐State Lithium‐Ion Microbatteries: A Review of Various Three‐Dimensional Concepts

Oudenhoven

Baggetto

Notten

2010

Advanced Energy Materials

691

638

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“…Li-rich solid electrolytes have received special interest because of their good safety features and high energy density and power capacity. There have been concerted efforts in search of solid Li electrolytes of diverse structural forms, including crystalline, glassy, polymer, and composite [2][3][4][5][6] Most solid Li-electrolyte materials, however, suffer from low Li + ion conductivity, or small operating voltage windows, or both which prevent them from being used in large scale applications. Recently, inspired by high-temperature superionic conductivity in fluorine-rich perovskite NaMgF 3 7 , CsPbF 3 8 , and KMnF 3 9 , a family of anti-perovskites, e.g., Li 3 OCl, Li 3 OBr, and their mixed compound Li 3 OCl 0.5 Br 0.5 , has been designed and synthesized 10 .…”

mentioning

confidence: 99%

Ab initiostudy of the stabilities of and mechanism of superionic transport in lithium-rich antiperovskites

2013

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Recently, a family of halogen-based Li-rich anti-perovskites was synthesized [J. Am. Chem. Soc. 134, 15042 (2012)], and the measured superionic conductivity makes these materials promising candidates as solid electrolytes for applications in Li-ion and Li-air batteries. This discovery raises several pressing issues on the fundamental physics concerning the thermodynamic and electrochemical stability of the synthesized materials and the mechanism of the observed superionic Li + transport. Here we study the reported anti-perovskites Li3OCl, Li3OBr and their mixed compounds using first-principles density functional theory and molecular dynamics simulations. Our calculations show that these materials are thermodynamically metastable. Their large electronic band gaps and chemical stability against electrodes suggest the excellent electrochemical performance, which bodes well for the use in potentially harsh working conditions in practical battery applications. The calculated low activation enthalpy for Li ion migration well below the crystal melting temperature and superionic transport near the Li sub-lattice melting state explain the experimentally observed phenomena. Our study identifies mobile Li vacancies and anion disorder as the primary driving mechanisms for superionic Li + conductivity in the anti-perovskites. The present work unveils essential working principles of the Li-rich anti-perovskites, which are crucial to further exploration, development, and application of these and other charge-inverted materials with tailored properties.

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“…This finding is the most attractive feature of the investigated garnet-type oxides compared to other ceramic lithium ion conductors. For comparison, the best lithium ion conductor based on perovskite LLT exhibits a total conductivity that is about two orders of magnitude lower than the bulk conductivity [68][69][70]. Furthermore, impedance and DC electrical investigations confirm the absence of electrolyteelectrode interface resistances in the case of Li 6 ALa 2 Ta 2 O 12 (A=Sr, Ba) when lithium metal is employed as reversible electrode (Fig.…”

Section: Na Super-ionic Conductor (Nasicon) Structured Lithium Ion Elmentioning

confidence: 91%

“…Figure 8 shows the bulk lithium ion conductivity of selected SSLICs. Among them, the x≈0.1 member of LLT exhibits the highest bulk lithium ion conductivity of 10 −3 S/cm at room temperature with an activation energy of 0.40 eV [68,69]. Stramare et al recently reviewed the lithium ion transport properties of LLT and structurally related materials [70].…”

Section: Perovskite-type Lithium Ion Conductorsmentioning

confidence: 99%

Recent progress in solid oxide and lithium ion conducting electrolytes research

Thangadurai

Weppner²

2006

Ionics

318

227

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Recent material developments of fast solid oxide and lithium ion conductors are reviewed. Special emphasis is placed on the correlation between the composition, structure, and electrical transport properties of perovskitetype, perovskite-related, and other inorganic crystalline materials in terms of the required functional properties for practical applications, such as fuel or hydrolysis cells and batteries. The discussed materials include Sr-and Mgdoped LaGaO 3 , Ba 2 In 2 O 5 , Bi 4 V 2 O 11 , RE-doped CeO 2 , (Li,La,)TiO 3 , Li 3 La 3 La 3 Nb 2 O 12 (M=Nb, Ta), and Na super-ionic conductor-type phosphate. Critical problems with regard to the development of practically useful devices are discussed.

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High ionic conductivity in lithium lanthanum titanate

Cited by 1,435 publications

References 9 publications

All‐Solid‐State Lithium‐Ion Microbatteries: A Review of Various Three‐Dimensional Concepts

All‐Solid‐State Lithium‐Ion Microbatteries: A Review of Various Three‐Dimensional Concepts

Ab initiostudy of the stabilities of and mechanism of superionic transport in lithium-rich antiperovskites

Recent progress in solid oxide and lithium ion conducting electrolytes research

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