Citrate gel synthesis of aluminum-doped lithium lanthanum titanate solid electrolyte for application in organic-type lithium–oxygen batteries

Le, Hang T.T.; Kalubarme, Ramchandra S.; Ngo, Duc Tung; Jang, Seong-Yong; Jung, Kyu‐Nam; Shin, Kyoung-Hee; Park, Chan‐Jin

doi:10.1016/j.jpowsour.2014.10.146

Cited by 49 publications

(42 citation statements)

References 56 publications

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“…In recent years, various organic materials, as well as inorganic materials, have been studied as solid electrolytes for reversible lithium cells [1][2][3][4]. Among them, La 2/3-x Li 3x TiO 3 (LLTO) exhibits one of the highest bulk lithium ion conductivity, exceeding 1Á10 -3 S cm -1 at room temperature (RT) [5][6][7][8][9][10][11]. Taking into account its low electronic conductivity [6,12], simple synthesis and good sinterability [5,9,[13][14][15], as well as decent stability in air and at high redox potentials [13,16], LLTO can be considered as a promising solid electrolyte material for solid-state lithium batteries.…”

Section: Graphic Abstract Introductionmentioning

confidence: 99%

Mitigation of grain boundary resistance in La2/3-xLi3xTiO3 perovskite as an electrolyte for solid-state Li-ion batteries

et al. 2020

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In this work, we report that modification of the chemical composition of grain boundaries of La2/3-xLi3xTiO3 double perovskite, one of the most promising Li-ion conducting solid electrolytes, can be a convenient and versatile way of controlling the space charge potential, leading to a mitigated electrical resistance of the grain boundaries. Two groups of additives are investigated: lithium-enriching agents (Li3BO3, LiF) and 3d metal ions (Co2+, Cu2+), both expected to reduce the Schottky barrier. It is observed that Li-containing additives work effectively at a higher sintering temperature of 1250 °C. Regarding copper, it shows a much stronger positive impact at lower temperature, 1150 °C, while the addition of cobalt is always detrimental. Despite overall complex behavior, it is documented that the decreased space charge potential plays a more important role in the improvement of lithium conduction than the thickness of the grain boundaries. Among the proposed additives, modification of La2/3-xLi3xTiO3 by 2 mol.% Cu2+ results in the space charge potential reduction by 32 mV in relation to the reference sample, and the grain boundary specific conductivity increase by 80%, as measured at 30 °C. Introduced additive allows to obtain a similar effect on the conductivity as elevating the sintering temperature, which can facilitate manufacturing procedure. Graphic abstract

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Section: Graphic Abstract Introductionmentioning

confidence: 99%

Mitigation of grain boundary resistance in La2/3-xLi3xTiO3 perovskite as an electrolyte for solid-state Li-ion batteries

et al. 2020

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“…The hybrid film with such a high porosity could provide enough space for Li deposition (around 0.43 g cm −3 based on the weight density of 0.534 g cm −3 of Li metal). In addition, a low sintering temperature of 800 °C and a short time of 2 h were applied for fabricating the hybrid films, greatly reducing power energy consumption, and time cost in comparison with the traditional solid phase sintering methods that required a high temperature of > 1000 °C and a long time of > 12 h . More importantly, the protective film did not significantly increase the cell resistance, as verified by the electrochemical Impedance Spectroscopy (EIS) results, indicating a high possibility of running the batteries at high current densities.…”

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confidence: 97%

Constructing Ionic Gradient and Lithiophilic Interphase for High‐Rate Li‐Metal Anode

Lai

Zhao

Cai

et al. 2019

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Li metal is the optimal choice as an anode due to its high theoretical capacity, but it suffers from severe dendrite growth, especially at high current rates. Here, an ionic gradient and lithiophilic inter‐phase film is developed, which promises to produce a durable and high‐rate Li‐metal anode. The film, containing an ionic‐conductive Li0.33La0.56TiO3 nanofiber (NF) layer on the top and a thin lithiophilic Al2O3 NF layer on the bottom, is fabricated with a sol–gel electrospinning method followed by sintering. During cycling, the top layer forms a spatially homogenous ionic field distribution over the anode, while the bottom layer reduces the driving force of Li‐dendrite formation by decreasing the nucleation barrier, enabling dendrite‐free plating‐stripping behavior over 1000 h at a high current density of 5 mA cm−2. Remarkably, full cells of Li//LiNi0.8Co0.15Al0.05O2 exhibit a high capacity of 133.3 mA h g−1 at 5 C over 150 cycles, contributing a step forward for high‐rate Li‐metal anodes.

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“…It can restrain oxygen diffusion from cathode to anode, thereby protecting the anode, additionally, it can absorb the electrolyte into its gel structure, reducing evaporation of the electrolyte's solvent. Furthermore, this gel electrolyte also has several advantages over a solid ceramic membrane [39,40]-for example: its flexibility means it is not easily broken.…”

Section: Resultsmentioning

confidence: 99%

A novel stability-enhanced lithium-oxygen battery with cellulose-based composite polymer gel as the electrolyte

Leng

Zeng

Chen

et al. 2015

Electrochimica Acta

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Citrate gel synthesis of aluminum-doped lithium lanthanum titanate solid electrolyte for application in organic-type lithium–oxygen batteries

Cited by 49 publications

References 56 publications

Mitigation of grain boundary resistance in La2/3-xLi3xTiO3 perovskite as an electrolyte for solid-state Li-ion batteries

Mitigation of grain boundary resistance in La2/3-xLi3xTiO3 perovskite as an electrolyte for solid-state Li-ion batteries

Constructing Ionic Gradient and Lithiophilic Interphase for High‐Rate Li‐Metal Anode

A novel stability-enhanced lithium-oxygen battery with cellulose-based composite polymer gel as the electrolyte

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