Evidence of the chemical stability of the garnet-type solid electrolyte Li5La3Ta2O12 towards lithium by a surface science approach

Fingerle, Mathias; Loho, Christoph; Ferber, Thimo; Hahn, Horst; Hausbrand, René

doi:10.1016/j.jpowsour.2017.08.109

Cited by 29 publications

(41 citation statements)

References 30 publications

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“…Fingerle et al applied X-ray and ultraviolet photoelectron spectroscopy to study the stability of Li 5 La 3 Ta 2 O 12 against Li after thermal deposition ( Figure 3A). [50] Upon thermal treatment, the structure of Li 5 La 3 Ta 2 O 12 Figure 2. Interfaces between lithium metal and SE.…”

Section: Chemical Stability With Lithium Metal Anodementioning

confidence: 99%

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Interfaces in Garnet‐Based All‐Solid‐State Lithium Batteries

Wang

Zhu

et al. 2020

Advanced Energy Materials

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liquid electrolytes. ASSLBs exhibit overwhelming advantages as follows: 1) No electrolyte leakage. The most obvious advantage of ASSLBs is the avoidance of electrolyte leakage, and related issues such as fire hazard, electrical short circuit and corruption. In addition, ASSLBs do not need advance sealants, pressurizing electrolyte, and flame retardant failsafe. [1,2] 2) No thermal runaway. Thermal runaway will cause the rise of internal temperature, pressure, and vent of flammable gases in conventional LIBs, at a risk of explosion and shrapnel. [3,4] ASSLBs avoid the use of organic electrolytes and prevent the thermal runaway for a large extent. [5] 3) High resistance to lithium dendrite. The lithium dendrite may form during deposition process and penetrate through the separator, potentially cause a short circuit in conventional LIBs. [6] ASSLBs using solid electrolytes (SEs) with high shear modulus are expected to prevent/alleviate the dendrite penetration and extend the cell life. 4) Higher energy density. [7] The conventional LIBs are not suitable for the application of high voltage cathode and lithium metal anode because of narrow electrochemical window of liquid electrolytes, as well as failure in preventing lithium dendrite. ASSLBs facilitate the application of high voltage cathode materials and high energy density lithium metal anode, therefore increasing the energy density of the whole cell. Figure 1 shows the scheme of a typical ASSLB. Similar with conventional LIBs, the main components of ASSLB are cathode, SE, and anode. The distinctive component is SE, and its properties support the great advantages of ASSLBs. These properties include stability at ultrahigh and ultralow temperature, high mechanical strength, [8] wider electrochemical window (with passivation), and so on. [9-11] According to the category of SE, ASSLBs are divided into polymer-based, oxide-based, and sulfide-based systems, corresponding to the polymer, oxide, and sulfide electrolytes, respectively. Therein, oxide electrolytes exhibit moderate ionic conductivity, high shear modulus, and better stability with atmosphere and electrodes, are promising candidates for ASSLB. Specifically, oxide electrolytes are classified into LISICON (Li 14 ZnGe 4 O 16), NASICION (LiTi 2 (PO 4) 3), perovskite (Li 3x La 0.67-x □ 0.33-2x TiO 3), garnet (Li 3-7 LnMO 12 , Ln = Y, Pr, Nd, La, Sm-Lu, M = Zr, Sb, W, etc.), and so on based on their structure. Without reductive Ge, Ti elements in the composition, garnets are normally considered most promising among oxide electrolytes. [12,13] Garnet-type electrolytes in the formula of Li 3-7 Ln 3 M 2 O 12 , show a space group 3 Ia d. Lithium content ranges from 3 to 7 based on the substitution elements at Ln and M sites. [14,15] All-solid-state lithium batteries (ASSLBs) are considered to be the nextgeneration energy storage system, because of their overwhelming advantages in energy density and safety compared to conventional lithium ion batteries. Among various systems, garnet-based ASSLBs are one of the most promis...

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Section: Chemical Stability With Lithium Metal Anodementioning

confidence: 99%

“…[45] Copyright 2015, Elsevier B.V. Reproduced with permission. [50] Copyright 2017, Elsevier B.V. D-F) Scanning transmission electron spectroscopy characterization of Li 7 La 3 Zr 2 O 12 with Li. Reproduced with permission.…”

Section: Chemical Stability With Lithium Metal Anodementioning

confidence: 99%

Interfaces in Garnet‐Based All‐Solid‐State Lithium Batteries

Wang

Zhu

et al. 2020

Advanced Energy Materials

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“…In ASSBs, ex situ XPS technique is utilized to not only characterize the coating layer on SEs [ 21,53 ] but also explore the electrochemical reaction mechanisms of the interface between electrode and SEs. [ 54–57 ] Pan et al [ 58 ] used XPS to discover that the main components of the SEI layer were ROLi, LiF, Li 2 O, Li 2 CO 3, and LiOH, which promote the formation of stable SEI layers and limit the growth of lithium dendrites. Liang et al [ 59 ] used XPS to characterize the degree of side reactions at the interface of LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) and Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 (LATP) solid electrolyte and found that less developed space charge layers is main reason for LATP transition layer stabilize cathode and solid electrolyte interfaces.…”

Section: Characterization Techniques For Interface In All‐solid‐statementioning

confidence: 99%

“…[ 63 ] The valence band region during the ASSBs interface study is usually analyzed by UPS. For example, Fingerler et al [ 54 ] used UPS to determine the valence band onset of the pristine LLZTO thin film at VBM = 3.6 eV. The schematic of DAISY‐Bat equipment and the result of UPS measurement are shown in Figure .…”

Section: Characterization Techniques For Interface In All‐solid‐statementioning

confidence: 99%

Advanced Characterization Techniques for Interface in All‐Solid‐State Batteries

Gao

et al. 2020

Small Methods

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The interface is a critical factor of electrochemical performance for all‐solid‐state batteries (ASSBs). Comprehending the composition, structure, morphology, and their evolution in the interface during charge/discharge cycling is greatly important for the development and practical application of ASSBs. The characterization techniques are very crucial and powerful for investigating the interface properties of ASSBs. This review briefly describes how the interface is generated in ASSBs, and then emphatically summarizes some important advanced techniques used to characterize the interface in ASSBs. The principle, advantage, and application of the techniques in the interface investigation are systematically discussed. This review provides fundamental insights and perspectives for developing the characterization techniques to deeply understand the interfacial behaviors of ASSBs, which is valuable for accelerating the commercialization of ASSBs used in electronic devices, electric vehicles, and large‐scale energy storage.

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“…24) Ob sich Feststoffelektrolyte für den Einsatz mit Elektrodenmaterialien eignen, hängt im Allgemeinen von den Eigenschaften der Reaktionsprodukte ab, da es nur wenige stabile Kombinationen gibt. 25) Für die Reaktivität der Feststoffelektrolyte sind erwartungsgemäß elektronische Grenzflächen-und Defektzustände verantwortlich. Neben Reaktionsschichten bestimmen Raumladungszonen den Transport von Li-Ionen durch die Grenzfläche, 26,27) deren Untersuchung ebenfalls ein aktuelles Thema der Batterieforschung ist.…”

Section: Reaktionsschichten An Festelektrolytgrenzflächenunclassified