Lithium-ion mobility in layered oxides Li2Ca1.5Nb3O10, Li2Ca1.5TaNb2O10 and Li2Ca1.5Ta2NbO10, enhanced by supercell formation

Fanah, Selorm Joy; Ramezanipour, Farshid

doi:10.1016/j.jechem.2020.12.014

Cited by 6 publications

(6 citation statements)

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“…9 In addition, ionic conductivities of >1.0 × 10 −3 S cm −1 at 300 °C have been reported for Ruddlesden-Popper layered perovskites. 13 These results suggest that the K2NiF4-type crystal structure is a good framework for developing novel ionic conductors, and that further improvements in the ionic conductivities can be achieved using this crystal structure.…”

Section: Accepted M Manuscriptmentioning

confidence: 83%

“…Considering the general formula of these perovskite-related materials (An+1BnX3n+1), certain materials with stoichiometric compositions (n = 2, 3, and 6) and non-stoichiometric compositions have been reported as lithium-ion conductors. [11][12][13] The conductivities of these materials range from 10 −7 to 10 −3 S cm −1 at ~300 °C. Further, LiATiO4 (A = La, Eu) materials with n = 1 have been synthesized, 14 and their lithium-intercalation capabilities as anodes have been reported.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Lithium-ion Conductivity of Sr(La1−xLi3x)ScO4 with a K2NiF4 Structure

et al. 2022

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Section: Accepted M Manuscriptmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Synthesis and Lithium-ion Conductivity of Sr(La1−xLi3x)ScO4 with a K2NiF4 Structure

et al. 2022

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“…The output response of the measurement consists of a semicircle at a high-frequency, followed by a spike (straight line) at a low-frequency region. The high-frequency semicircle is attributed to the transport of Li + ions in the grain interior, R b and across the grain boundaries, and the low-frequency spike is associated with the blocking of mobile Li-ions by gold electrodes. , The resulting EIS data at each measured temperature were fitted using one parallel CPE (constant phase element)-resistor unit, which is in series to another CPE (Figure S10). The Nyquist plots of pristine Li 2 ZrF 6 are displayed in Figure S11.…”

Section: Resultsmentioning

confidence: 99%

Influence of Chloride Ion Substitution on Lithium-Ion Conductivity and Electrochemical Stability in a Dual-Halogen Solid-State Electrolyte

Umeshbabu

Satyanarayana

et al. 2022

ACS Appl. Mater. Interfaces

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Li+ conducting halide solid-state electrolytes (SEs) are developing as an alternative to contemporary oxide and sulfide SEs for all-solid-state batteries (ASSBs) due to their high ionic conductivity, excellent chemical and electrochemical oxidation stability, and good deformability. However, the instability of halide SEs against the Li anode is still one of the key challenges that need to be addressed. Among halides, fluorides have shown a wider electrochemical stability window due to fluoride’s high electronegativity and smaller ionic radius. However, the ionic conductivity of fluoride-based SEs is lower compared to other halide-based SEs. To achieve better interface stability with the Li anode, the presence of fluoride is not only advantageous for a wider potential window but also forms a stable passivation layer at the Li/SEs interface. Therefore, developing mixed halogen-based solid electrolytes, particularly fluorine and chlorine-based SEs are promising in ASSBs. Herein, we report dual halogen-based SEs, Li2ZrF6–x Cl x (0 ≤ x ≤ 2), synthesized via ball-milling. The X-ray diffraction results revealed that Li2ZrF6–x Cl x compounds crystallize in the trigonal phase (P3̅1m). Using impedance spectroscopy, an increase in Li+ conductivity with the increase in Cl content was observed for Li2ZrF6–x Cl x . Compared with x = 0, Li+ conductivity for the sample with x = 1 improved by ∼5 orders of magnitude. The Li+ conductivities for Li2ZrF5Cl1 at 25 and 100 °C are 5.5 × 10–7 and 2.1 × 10–5 S/cm, respectively. Moreover, Li2ZrF5Cl1 exhibits the widest electrochemical stability window and excellent Li interface stability. Our work indicates Li2ZrF6–x Cl x as an attractive material for optimization in the class of halide-based solid-state Li-ion conductors.

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“…The RP structure comprises stacks of octahedral BO 6 units, where A and A′ are located in intra‐ and inter‐stack gaps, respectively. These materials have shown promising functional properties for a variety of energy‐related purposes [20–27] . In recent years, our research group has studied a range of oxide materials derived from perovskites, including RP oxides, for various applications, such as oxide‐ion intercalation pseudocapacitance [5,19,28] …”

Section: Introductionmentioning

confidence: 99%

Pseudocapacitive Properties of Isostructural Oxides Sr₂LaBMnO₇ (B=Co, Fe)

Kananke‐Gamage,

Alom,

Ramezanipour

2023

ChemPhysChem

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Pseudocapacitors promise to fill the gap between traditional capacitors and batteries by delivering reasonable energy densities and power densities. In this work, pseudocapacitive charge storage properties are demonstrated for two isostructural oxides, Sr2LaFeMnO7 and Sr2LaCoMnO7. These materials comprise spatially separated bilayer stacks of corner sharing BO6 units (B = Fe, Co or Mn). The spaces between stacks accommodate the lanthanum and strontium ions, and the remining empty spaces are available for oxide ion intercalation, leading to pseudocapacitive charge storage. Iodometric titrations indicate that these materials do not have oxygen‐vacancies. Therefore, the oxide ion intercalation becomes possible due to their structural features and the availability of interstitial sites between the octahedral stacks. Electrochemical studies reveal that both materials show promising energy density and power density values. Further experiments through fabrication of a symmetric two‐electrode cell indicate that these materials retain their pseudocapacitive performance over hundreds of cycles of galvanostatic charge‐discharge cycles, with little degradation even after 1000 cycles.

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Lithium-ion mobility in layered oxides Li2Ca1.5Nb3O10, Li2Ca1.5TaNb2O10 and Li2Ca1.5Ta2NbO10, enhanced by supercell formation

Cited by 6 publications

References 56 publications

Synthesis and Lithium-ion Conductivity of Sr(La<sub>1−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>)ScO<sub>4</sub> with a K<sub>2</sub>NiF<sub>4</sub> Structure

Synthesis and Lithium-ion Conductivity of Sr(La<sub>1−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>)ScO<sub>4</sub> with a K<sub>2</sub>NiF<sub>4</sub> Structure

Influence of Chloride Ion Substitution on Lithium-Ion Conductivity and Electrochemical Stability in a Dual-Halogen Solid-State Electrolyte

Pseudocapacitive Properties of Isostructural Oxides Sr₂LaBMnO₇ (B=Co, Fe)

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Lithium-ion mobility in layered oxides Li2Ca1.5Nb3O10, Li2Ca1.5TaNb2O10 and Li2Ca1.5Ta2NbO10, enhanced by supercell formation

Cited by 6 publications

References 56 publications

Synthesis and Lithium-ion Conductivity of Sr(La<sub>1−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>)ScO<sub>4</sub> with a K<sub>2</sub>NiF<sub>4</sub> Structure

Synthesis and Lithium-ion Conductivity of Sr(La<sub>1−</sub><i><sub>x</sub></i>Li<sub>3</sub><i><sub>x</sub></i>)ScO<sub>4</sub> with a K<sub>2</sub>NiF<sub>4</sub> Structure

Influence of Chloride Ion Substitution on Lithium-Ion Conductivity and Electrochemical Stability in a Dual-Halogen Solid-State Electrolyte

Pseudocapacitive Properties of Isostructural Oxides Sr2LaBMnO7 (B=Co, Fe)

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Pseudocapacitive Properties of Isostructural Oxides Sr₂LaBMnO₇ (B=Co, Fe)