Stability investigations of composite solid electrolytes based on Li7La3Zr2O12 in contact with LiCoO2

Il’ina, E. A.; Антонов, Б. Д.; Vlasov, Maxim I.

doi:10.1016/j.ssi.2020.115452

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…This seems to contradict the previous conclusions and II'ina et al 111 explained that elemental doping might improve the interfacial thermal stability of LLZO/LCO. Moreover, Il'ina et al 116 found that glassy additive in tetragonal and cubic LLZO mixed with LCO also showed good stability up to 800°C, corroborated by DSC and XRD results.…”

Section: Interface‐level Thermal Stability Of Sesmentioning

confidence: 71%

Progress in thermal stability of all‐solid‐state‐Li‐ion‐batteries

Wang

et al. 2021

InfoMat

179

108

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Thermal safety is one of the major issues for lithium‐ion batteries (LIBs) used in electric vehicles. The thermal runaway mechanism and process of LIBs have been extensively studied, but the thermal problems of LIBs remain intractable due to the flammability, volatility and corrosiveness of organic liquid electrolytes. To ultimately solve the thermal problem, all‐solid‐state LIBs (ASSLIBs) are considered to be the most promising technology. However, research on the thermal stability of solid‐state electrolytes (SEs) is still in its initial stage, and the thermal safety of ASSLIBs still needs further validation. Moreover, the specified reviews summarizing the thermal stability of ASSLIBs and all types of SEs are still missing. To fill this gap, this review systematically discussed recent progress in the field of thermal properties investigation for ASSLIBs, form levels of materials and interface to the whole battery. The thermal properties of three major types of SEs, including polymer, oxide, and sulfide SEs are systematically reviewed here. This review aims to provide a comprehensive understanding of the thermal stability of SEs for the benign development of ASSLIBs and their promising application under practical operating conditions.

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Section: Interface‐level Thermal Stability Of Sesmentioning

confidence: 71%

Progress in thermal stability of all‐solid‐state‐Li‐ion‐batteries

Wang

et al. 2021

InfoMat

179

108

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“…were used as the starting materials for obtaining the LiCoO 2 by sol-gel synthesis as demonstrated in [38]. Lithium carbonate was dissolved in diluted nitric acid.…”

Section: Methodsmentioning

confidence: 99%

“…The stability of the cubic Li 7 La 3 Zr 2 O 12 doped by Al in contact with LiCoO 2 was evaluated in our previous work [38]. It was established that no exothermic or endothermic peaks are observed on the DSC curve after heating up to 900 • C. Moreover, the phase composition of the c-LLZ and LiCoO 2 mixture does not change after heating at 400, 600 and 800 • C according to the XRD data.…”

Section: Determination Of Heat Treatment Conditions For Licoo 2 -And LI 4 Ti 5 O 12 -Based Composite Electrodesmentioning

confidence: 99%

Impact of Li3BO3 Addition on Solid Electrode-Solid Electrolyte Interface in All-Solid-State Batteries

et al. 2021

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All-solid-state lithium-ion batteries raise the issue of high resistance at the interface between solid electrolyte and electrode materials that needs to be addressed. The article investigates the effect of a low-melting Li3BO3 additive introduced into LiCoO2- and Li4Ti5O12-based composite electrodes on the interface resistance with a Li7La3Zr2O12 solid electrolyte. According to DSC analysis, interaction in the studied mixtures with Li3BO3 begins at 768 and 725 °C for LiCoO2 and Li4Ti5O12, respectively. The resistance of half-cells with different contents of Li3BO3 additive after heating at 700 and 720 °C was studied by impedance spectroscopy in the temperature range of 25–340 °C. It was established that the introduction of 5 wt% Li3BO3 into LiCoO2 and heat treatment at 720 °C led to the greatest decrease in the interface resistance from 260 to 40 Ω cm2 at 300 °C in comparison with pure LiCoO2. An SEM study demonstrated that the addition of the low-melting component to electrode mass gave better contact with ceramics. It was shown that an increase in the annealing temperature of unmodified cells with Li4Ti5O12 led to a decrease in the interface resistance. It was found that the interface resistance between composite anodes and solid electrolyte had lower values compared to Li4Ti5O12|Li7La3Zr2O12 half-cells. It was established that the resistance of cells with the Li4Ti5O12/Li3BO3 composite anode annealed at 720 °C decreased from 97.2 (x = 0) to 7.0 kΩ cm2 (x = 5 wt% Li3BO3) at 150 °C.

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