Chemical stability and functionality of Al2O3 artificial solid electrolyte interphases on alkali metals under open circuit voltage conditions

Lim, Kyungmi; Hagel, Marion; Küster, Kathrin; Fenk, Bernhard; Weis, J.; Starke, Ulrich; Popović, Jelena; Maier, Joachim

doi:10.1063/5.0123535

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…At the first cycle, there is a broad reduction peak between −0.35 and −0.45 V, which is attributed to the sacrificial decompositions of electrolyte components (PC) and the formation of the SEI. , It can be seen that the reduction peak disappears in the 30th cycle, indicating the irreversibility of SEI formation. The presence of the ALD–AZO coating can accelerate densification of the SEI and the constraints it imposes on the reaction product formation. , Figure b compares the CV curves of the AZO/WO 3 and WO 3 thin films. It can be clearly seen that there are two oxidation peaks located between 0.1 and 0.3 V, which can be attributed to the multistep deintercalation of the multivalent cation (Al 3+ ) .…”

Section: Resultsmentioning

confidence: 99%

“…The presence of the ALD−AZO coating can accelerate densification of the SEI and the constraints it imposes on the reaction product formation. 27,28 Figure 2b compares the CV curves of the AZO/WO 3 and WO 3 thin films. It can be clearly seen that there are two oxidation peaks located between 0.1 and 0.3 V, which can be attributed to the multistep deintercalation of the multivalent cation (Al 3+ ).…”

Section: Resultsmentioning

confidence: 99%

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Constructing an Al³⁺/Zn²⁺-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al³⁺-Based Electrochromic Devices

Weng,

Cao,

Song

et al. 2024

ACS Appl. Mater. Interfaces

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The interface between the electrochromic (EC) electrode and ionic conductor is crucial for high-performance and extraordinarily stable EC devices (ECDs). Herein, the effect of the ALD−AZO interfacial layer on the performance of the WO 3 thin film was examined, revealing that an introduction of the ALD−AZO interfacial layer to the Al 3+ -based complementary ECDs can lead to improved EC performance and stability, such as an extraordinary cyclability of more than 20,000 cycles, an outstanding coloration efficiency of 109.69 cm 2 C −1 , and a maximum transmittance modulation of 63.44%@633 nm. The probable explanation is that the introduced ALD−AZO interfacial layer can effectively regulate the band gap of WO 3 , promote the electron transport process, and induce the formation of a robust solid electrolyte interphase to protect the electrode during cycling. These findings offer valuable insights for enhancing the EC performance of the EC thin films and new space for the construction of advanced multivalent Al 3+ -based ECDs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Constructing an Al³⁺/Zn²⁺-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al³⁺-Based Electrochromic Devices

Weng,

Cao,

Song

et al. 2024

ACS Appl. Mater. Interfaces

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In situ formation of solid electrolyte interphase for improved cyclability of electrochromic tungsten oxide thin films

Weng,

Zhang,

Wang

et al. 2024

Surfaces and Interfaces

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Study on an Interpenetrating Artificial SEI for Lithium Metal Anode Modification and Fast Charging Characterization

Li,

Xin,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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Artificial SEI is one of the effective strategies to improve lithium dendrites and suppress side reactions. However, the role of SEI components and distribution on the modification of the lithium metal anode remains unclear. Therefore, in this study, the oxygen− sulfur (O−S) component and its distribution in SEI were modulated by designing experiments, and then the mechanism of its action was deeply investigated. The study is based on an in-depth analysis of the properties of lithium sulfide (Li 2 S) and lithium oxide (Li 2 O) as SEI layer materials and effectively combines them in an ether electrolyte environment to form an innovative SEI structure. The experimental results show that the optimal SEI modulation condition is O120− S10. O120−S10 significantly improves the kinetic performance of electrochemical reactions, reduces the film resistance, and achieves cycling stability of up to 2100 h during high-capacity lithium deposition/stripping at 5 mAh cm −2 . When used in conjunction with a ternary cathode material (NCM811), the O120−S10 demonstrates excellent performance under high rate charge/discharge conditions at 10C. After 1500 cycle tests, the battery's specific capacity was maintained at 90 mAh g −1 and the Coulombic efficiency reached 98.52%. Through X-ray photoelectron spectroscopy (XPS) analysis, the vertical structure and ratio distribution of components in SEI were revealed in detail, and the optimal component ratios of Li 2 S 46.48%, Li 2 O 46.02%, and Li 2 CO 3 7.50% were determined. The mechanism of action is to achieve a 1 + 1 > 2 superlinear synergistic effect and fast charging performance by combining the ability of Li 2 O's low lithium ion diffusion barrier with Li 2 S's ability to inhibit the growth of lithium dendrites.

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Chemical stability and functionality of Al2O3 artificial solid electrolyte interphases on alkali metals under open circuit voltage conditions

Cited by 4 publications

References 22 publications

Constructing an Al³⁺/Zn²⁺-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al³⁺-Based Electrochromic Devices

Constructing an Al³⁺/Zn²⁺-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al³⁺-Based Electrochromic Devices

In situ formation of solid electrolyte interphase for improved cyclability of electrochromic tungsten oxide thin films

Study on an Interpenetrating Artificial SEI for Lithium Metal Anode Modification and Fast Charging Characterization

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Chemical stability and functionality of Al2O3 artificial solid electrolyte interphases on alkali metals under open circuit voltage conditions

Cited by 4 publications

References 22 publications

Constructing an Al3+/Zn2+-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al3+-Based Electrochromic Devices

Constructing an Al3+/Zn2+-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al3+-Based Electrochromic Devices

In situ formation of solid electrolyte interphase for improved cyclability of electrochromic tungsten oxide thin films

Study on an Interpenetrating Artificial SEI for Lithium Metal Anode Modification and Fast Charging Characterization

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Constructing an Al³⁺/Zn²⁺-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al³⁺-Based Electrochromic Devices

Constructing an Al³⁺/Zn²⁺-Based Solid Electrolyte Interphase to Enable Extraordinarily Stable Al³⁺-Based Electrochromic Devices