Improving cathode/Li6.4La3Zr1.4Ta0.6O12 electrolyte interface with a hybrid PVDF-HFP-based buffer layer for solid lithium battery

Yang, Hao; Mu, Linjing; Wu, Borong; Bi, Jian; Zhang, Ling; Rao, S. Sreepathi

doi:10.1007/s10853-020-04701-8

Cited by 11 publications

(5 citation statements)

References 48 publications

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“…[15,16,18] To improve the interface between the brittle ceramic separators and the composite cathodes, buffer layers are required as well (Figure 5c). [143,147] For example, a curable polymer-matrix glue electrolyte was applied between a sulfurized polyacrylonitrile-matrix composite cathode and an LLZObased ceramic separator, aiming to address the poor solid-solid contact and thus decrease the high interfacial resistance. With the glue modification, a solid-state Li-S cell showed a capacity retention of 95.2% after 50 cycles at RT and no obvious failure was observed at the cathode/separator interface.…”

Section: Interface Between Cathodes and Solid Electrolyte Separatorsmentioning

confidence: 99%

Role of Interfaces in Solid‐State Batteries

Miao

Guan

et al. 2023

Advanced Materials

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Solid‐state batteries (SSBs) are considered as one of the most promising candidates for the next‐generation energy‐storage technology, because they simultaneously exhibit high safety, high energy density, and wide operating temperature range. The replacement of liquid electrolytes with solid electrolytes produces numerous solid–solid interfaces within the SSBs. A thorough understanding on the roles of these interfaces is indispensable for the rational performance optimization. In this review, the interface issues in the SSBs, including internal buried interfaces within solid electrolytes and composite electrodes, and planar interfaces between electrodes and solid electrolyte separators or current collectors are discussed. The challenges and future directions on the investigation and optimization of these solid–solid interfaces for the production of the SSBs are also assessed.

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Section: Interface Between Cathodes and Solid Electrolyte Separatorsmentioning

confidence: 99%

Role of Interfaces in Solid‐State Batteries

Miao

Guan

et al. 2023

Advanced Materials

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“…However, PEO is susceptible to decomposition at high voltages and high temperatures. Polymer matrix consisting of poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) [ 20 ] and PEO blends have been tried as catholyte interlayer with favorable cycling stability. The combination of PVDF-HFP and PEO can offer enhanced anti-oxidation capability with a wider electrochemical stability window, consequently boosting the specific capacity of battery [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced High-Temperature Cycling Stability of Garnet-Based All Solid-State Lithium Battery Using a Multi-Functional Catholyte Buffer Layer

Zhao,

Zhong,

Cao

et al. 2024

Nano-Micro Lett.

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The pursuit of safer and high-performance lithium-ion batteries (LIBs) has triggered extensive research activities on solid-state batteries, while challenges related to the unstable electrode–electrolyte interface hinder their practical implementation. Polymer has been used extensively to improve the cathode-electrolyte interface in garnet-based all-solid-state LIBs (ASSLBs), while it introduces new concerns about thermal stability. In this study, we propose the incorporation of a multi-functional flame-retardant triphenyl phosphate additive into poly(ethylene oxide), acting as a thin buffer layer between LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode and garnet electrolyte. Through electrochemical stability tests, cycling performance evaluations, interfacial thermal stability analysis and flammability tests, improved thermal stability (capacity retention of 98.5% after 100 cycles at 60 °C, and 89.6% after 50 cycles at 80 °C) and safety characteristics (safe and stable cycling up to 100 °C) are demonstrated. Based on various materials characterizations, the mechanism for the improved thermal stability of the interface is proposed. The results highlight the potential of multi-functional flame-retardant additives to address the challenges associated with the electrode–electrolyte interface in ASSLBs at high temperature. Efficient thermal modification in ASSLBs operating at elevated temperatures is also essential for enabling large-scale energy storage with safety being the primary concern.

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“…A space charge layer (SLC) is formed at the interface by the redistribution of mobile carriers upon contact of two phases with different chemical potentials. 4,5 There are arguments put forward about the interfacial resistance and space charge effect on Li + transport but there is no clear experimental evidence yet, demonstrating the consequences of SCL in reducing interfacial resistance. [6][7][8] Usually, SCL is formed at the interface of an electrolyte and cathode, leading to the formation of lithium enriched state at the cathode side and lithium depleted state at the electrolyte side.…”

Section: Introductionmentioning

confidence: 99%

Dilithium phthalocyanine - A Single Ion Transport Interfacial layer for Solid-State Lithium Batteries

Chesta,

Kalleshappa,

Srinivasan

2024

Preprint

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All-solid-state batteries possess several advantages including high safety, flexibility to use high-capacity metal anodes and are projected to be the next generation energy storage devices. Garnet-type cubic Li7La3Zr2O12 (LLZO) solid electrolyte is of particular interest due to its high ionic conductivity under ambient conditions and compatibility with Li metal. However, large electrode/electrolyte interfacial resistance constraints their development. Herein, the use of a highly lithium ion conducting dilithium phthalocyanine (Li2Pc) as an interlayer is proposed to effectively suppress the high impedance at the interface thus improving the electrode-electrolyte contact. Fast Li+ mobility and high dielectric constant of dilithium phthalocyanine enhance the kinetics of Li+ transport across the interface. A significant reduction in overpotential and very stable stripping/plating cycling are observed in lithium symmetric cells upon introducing Li2Pc interlayer as compared to the use of bare tantalum doped lithium lanthanum zirconium oxide (LLZTO) electrolyte. Cells comprising interlayer-modified Li|LLZTO|LiFePO4 show high capacity with excellent cycling and rate capability. The performance of full cells using lithiated graphite and lithium titanate anodes has also been evaluated. This study presents a promising application of garnet electrolytes towards the advancement of solid-state lithium batteries.

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Improving cathode/Li6.4La3Zr1.4Ta0.6O12 electrolyte interface with a hybrid PVDF-HFP-based buffer layer for solid lithium battery

Cited by 11 publications

References 48 publications

Role of Interfaces in Solid‐State Batteries

Role of Interfaces in Solid‐State Batteries

Enhanced High-Temperature Cycling Stability of Garnet-Based All Solid-State Lithium Battery Using a Multi-Functional Catholyte Buffer Layer

Dilithium phthalocyanine - A Single Ion Transport Interfacial layer for Solid-State Lithium Batteries

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