In-situ constructed SnO2 gradient buffer layer as a tight and robust interphase toward Li metal anodes in LATP solid state batteries

Wang, Lifan; Wang, Leiying; Shi, Qinlin; Cong, Zhen; Gong, Danya; Wang, Xindong; Zhan, Chun; Liu, Guicheng

doi:10.1016/j.jechem.2023.01.040

Cited by 20 publications

(9 citation statements)

References 58 publications

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“…From the charge–discharge curves of the LFP/CPET2/Li battery (Figure e), one can observe that the polarization voltage rises slowly and the discharge specific capacity has a slight decrease with the rise of the cycle number. The battery impedance changes before and after the cycle can also be utilized to evaluate the cycling stability of SSLMBs. − The interfacial impedance of the LFP/CPET2/Li battery increases to 504.9 from 202.3 Ω at 0.5C after 250 cycles with a mean increase of only 1.2 Ω per cycle (Figure S13a). As for the LFP/CPE2/Li battery, its interfacial impedance increases to 553.7 from 314.1 Ω after 90 cycles with a mean increase of 2.7 Ω per cycle (Figure S13b).…”

Section: Resultsmentioning

confidence: 99%

In Situ Gelation of a 1,3-Dioxolane Dual-Permeable Porous Tandem Framework with Excellent Interfacial Stability to Power Long-Cycling Solid-State Lithium Metal Batteries

Song

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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Ceramic Li1.3Al0.3Ti1.7(PO4)3 (LATP) with high ionic conductivity and stability in ambient atmosphere is considered to be potent as a solid-state electrolyte of solid-state lithium metal batteries (SSLMBs), but its huge interfacial impedance with electrodes and the unwanted Ti4+-mediated reduction reaction caused by the lithium (Li) metal anode greatly limit its application in LMBs. Herein, a composite polymer electrolyte (CPET) was integrated by in situ gelation of dual-permeable 1, 3-dioxolane (DOL) in the tandem framework composed of the commercial cellulose membrane TF4030 and a porous three-dimensional (3D) skeleton-structured LATP. The in situ gelled DOL anchored in the tandem framework ensured nice interfacial contact between the as-prepared CPET and electrodes. The introduction of the porous 3D LATP endowed CPET the increased lithium-ion migration number (tLi+ ) of 0.70, a wide electrochemical stability window (ESW) of 4.86 V, and a high ionic conductivity of 1.16 × 10–4 S cm–1 at room temperature (RT). Meanwhile, the side reaction of the LATP/Li metal was adequately restrained by inserting TF4030 between the porous LATP and Li anode. Profiting from the superb interfacial stability and the enhanced ionic transport capacity of CPET, Li/Li batteries based on the optimal CPET (CPET2) cycled over 2000 h at 20∼30 °C smoothly. Moreover, solid-state LiFePO4 (LFP)/Li with CPET2 exhibited excellent electrochemical performance with a capacity retention ratio of 72.2% after 400 cycles at 0.5C. This work offers an integrated strategy to guide the fabrication of a highly conductive solid electrolyte and a stable interface design for high-performance SSLMBs.

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Section: Resultsmentioning

confidence: 99%

In Situ Gelation of a 1,3-Dioxolane Dual-Permeable Porous Tandem Framework with Excellent Interfacial Stability to Power Long-Cycling Solid-State Lithium Metal Batteries

Song

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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“…To alleviate the interfacial side reactions between LATP and Li metal, an interlayer is usually introduced at the Li/LATP interface. This strategy extended the lifetime of LATP-based SSBs to varying degrees. − However, the interlayer alone would still fail to stabilize the interface during long cycles or at high current density due to its insufficient capability to block electron penetration. Especially, the Li/LATP interlayering strategy is not able to suppress the electron leakage within LATP.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Lithium Batteries with Ultrastable Cyclability: An Internal–External Modification Strategy

Luo,

Sun,

You

et al. 2024

ACS Nano

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A commonly used strategy to tackle the unstable interfacial problem between Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) and lithium (Li) is to introduce an interlayer. However, this strategy has a limited effect on stabilizing LATP during long-term cycling or under high current density, which is due in part to the negative impact of its internal defects (e.g., gaps between grains (GBs)) that are usually neglected. Here, control experiments and theoretical calculations show clearly that the GBs of LATP have higher electronic conductivity, which significantly accelerates its side reactions with Li. Thus, a simple LiCl solution immersion method is demonstrated to modify the GBs and their electronic states, thereby stabilizing LATP. In addition to LiCl filling, composite solid polymer electrolyte (CSPE) interlayering is concurrently introduced at the Li/ LATP interface to realize the internal−external dual modifications for LATP. As a result, electron leakage in LATP can be strictly inhibited from its interior (by LiCl) and exterior (by CSPE), and such dual modifications can well protect the Li/LATP interface from side reactions and Li dendrite penetration. Notably, thus-modified Li symmetrical cells can achieve ultrastable cycling for more than 3500 h at 0.4 mA cm −2 and 1500 h at 0.6 mA cm −2 , among the best cycling performance to date.

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“…A large number of reported Li/LATP interfacial modication strategies can be divided into inorganic layers, organic layers and composite layers. 21 The inorganic layers contain metals (Ge and Al), 20,22,23 metal oxides (Al 2 O 3 , ZnO, and SnO 2 ), 16,24,25 halides (ZnF 2 and AgI), 26,27 among others. These inorganic layers can effectively protect LATP and enhance lithium wettability.…”

Section: Introductionmentioning

confidence: 99%

Stabilizing a Li_1.3Al_0.3Ti_1.7(PO₄)₃/Li metal anode interface in solid-state batteries with a LiF/Cu-rich multifunctional interlayer

Ding,

Ma,

Tao

et al. 2024

Chem. Sci.

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In-situ constructed SnO2 gradient buffer layer as a tight and robust interphase toward Li metal anodes in LATP solid state batteries

Cited by 20 publications

References 58 publications

In Situ Gelation of a 1,3-Dioxolane Dual-Permeable Porous Tandem Framework with Excellent Interfacial Stability to Power Long-Cycling Solid-State Lithium Metal Batteries

In Situ Gelation of a 1,3-Dioxolane Dual-Permeable Porous Tandem Framework with Excellent Interfacial Stability to Power Long-Cycling Solid-State Lithium Metal Batteries

Solid-State Lithium Batteries with Ultrastable Cyclability: An Internal–External Modification Strategy

Stabilizing a Li_1.3Al_0.3Ti_1.7(PO₄)₃/Li metal anode interface in solid-state batteries with a LiF/Cu-rich multifunctional interlayer

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In-situ constructed SnO2 gradient buffer layer as a tight and robust interphase toward Li metal anodes in LATP solid state batteries

Cited by 20 publications

References 58 publications

In Situ Gelation of a 1,3-Dioxolane Dual-Permeable Porous Tandem Framework with Excellent Interfacial Stability to Power Long-Cycling Solid-State Lithium Metal Batteries

In Situ Gelation of a 1,3-Dioxolane Dual-Permeable Porous Tandem Framework with Excellent Interfacial Stability to Power Long-Cycling Solid-State Lithium Metal Batteries

Solid-State Lithium Batteries with Ultrastable Cyclability: An Internal–External Modification Strategy

Stabilizing a Li1.3Al0.3Ti1.7(PO4)3/Li metal anode interface in solid-state batteries with a LiF/Cu-rich multifunctional interlayer

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Stabilizing a Li_1.3Al_0.3Ti_1.7(PO₄)₃/Li metal anode interface in solid-state batteries with a LiF/Cu-rich multifunctional interlayer