Localized high concentration polymer electrolyte enabling room temperature solid-state lithium metal batteries with stable LiF-rich interphases

Lu, Junjie; Sheng, Bifu; Chen, Minfeng; Xu, Min; Zhang, Yiyi; Zhao, Sheng; Zhou, Qingqing; Li, Chuyang; Wang, Bin; Liu, Jingjing; Chen, Jizhang; Lou, Zhichao; Han, Xiang

doi:10.1016/j.ensm.2024.103570

Energy Storage Materials

2024

DOI: 10.1016/j.ensm.2024.103570

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Localized high concentration polymer electrolyte enabling room temperature solid-state lithium metal batteries with stable LiF-rich interphases

Junjie Lu,

Bifu Sheng,

Minfeng Chen

et al.

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2024

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Cited by 3 publications

References 48 publications

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High‐Voltage All‐Solid‐State Lithium Metal Batteries Enabled by Localized High‐Salt‐Concentration In‐Chain Clustering Copolymer Electrolytes

You,

Lai,

Wei

et al. 2024

Adv Funct Materials

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All‐solid‐state polymer electrolyte‐based rechargeable batteries paired with high‐voltage cathodes and lithium anodes hold promising prospects to increase the energy density and the safety of lithium metal batteries (LMBs). To improve the stability of the polymer electrolytes at both the positive and negative electrodes, fluorinated polymer electrolytes have been designed and synthesized by copolymerization of epoxide monomers containing cyclic carbonates and fluorinated moieties. The cyclic carbonates possessing a large dielectric constant endow the polymer electrolytes with a high salt solubility. While, the introduction of the fluorinated moieties gives rise to an enhanced oxidation resistance of the electrolytes particularly in the cathode on one hand; on the other hand, it results in in‐chain micelle‐like clusters on the scale of a few nanometers due to the superior hydrophobicity, hence promoting the formation of localized high‐concentration polymer‐in‐salt electrolytes (PISEs) with a high lithium‐ion conductivity and transference number. This synergistic strategy enables a large lithium‐ion transference number of ∼0.72, a wide electrochemical stability window up to 5.2 V, and stable electrode/electrolyte interfaces. The Li/PISE/Li cells demonstrate stable cycling over 1500 h, and the all‐solid‐state NCM811/PISE/Li batteries exhibit a superior discharge capacity and prolonged cycling stability (∼98% capacity retention at 500 cycles) at 30 °C.

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High‐Voltage All‐Solid‐State Lithium Metal Batteries Enabled by Localized High‐Salt‐Concentration In‐Chain Clustering Copolymer Electrolytes

You,

Lai,

Wei

et al. 2024

Adv Funct Materials

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Tailoring Li⁺ Local Coordination Environment of Solid Polymer Electrolytes to Boom Ionic Conductivity

Zhao,

Zhang,

Zhao

et al. 2024

Small

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The low ionic conductivity is the key issue of solid polymer electrolytes (SPEs), hampering their practical application. Great efforts have been devoted to reducing their crystallinity to increase ionic conductivity but ignored their Li+ local coordination environment influence. Here, Li+ local coordination environment tunable poly(vinylidene fluoride‐co‐hexafluoropropylene)‐based solid‐state electrolytes are experimentally realized via d‐cellobiose octaacetate. d‐cellobiose octaacetate competes with anions and polymer chains for coordination of Li+ thorough C═O groups to weaken their coordination of Li+, increase the number of carriers, and strengthen the transport kinetics of Li+, booming the ionic conductivity of SPEs at room temperature. When used in lithium metal symmetric batteries and full batteries, SPEs greatly improve their electrochemical performance at 25 °C. This work clarifies the important influence of Li+ local coordination environment on Li+ transport and provides a promising strategy to improve the ionic conductivity of SPEs.

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Gel electrolyte modification enables planar Li deposition and fast kinetics toward high energy Li metal batteries

Zhang,

Zhao,

et al. 2024

New J. Chem.

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Localized high concentration polymer electrolyte enabling room temperature solid-state lithium metal batteries with stable LiF-rich interphases

Cited by 3 publications

References 48 publications

High‐Voltage All‐Solid‐State Lithium Metal Batteries Enabled by Localized High‐Salt‐Concentration In‐Chain Clustering Copolymer Electrolytes

High‐Voltage All‐Solid‐State Lithium Metal Batteries Enabled by Localized High‐Salt‐Concentration In‐Chain Clustering Copolymer Electrolytes

Tailoring Li⁺ Local Coordination Environment of Solid Polymer Electrolytes to Boom Ionic Conductivity

Gel electrolyte modification enables planar Li deposition and fast kinetics toward high energy Li metal batteries

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Localized high concentration polymer electrolyte enabling room temperature solid-state lithium metal batteries with stable LiF-rich interphases

Cited by 3 publications

References 48 publications

High‐Voltage All‐Solid‐State Lithium Metal Batteries Enabled by Localized High‐Salt‐Concentration In‐Chain Clustering Copolymer Electrolytes

High‐Voltage All‐Solid‐State Lithium Metal Batteries Enabled by Localized High‐Salt‐Concentration In‐Chain Clustering Copolymer Electrolytes

Tailoring Li+ Local Coordination Environment of Solid Polymer Electrolytes to Boom Ionic Conductivity

Gel electrolyte modification enables planar Li deposition and fast kinetics toward high energy Li metal batteries

Contact Info

Product

Resources

About

Tailoring Li⁺ Local Coordination Environment of Solid Polymer Electrolytes to Boom Ionic Conductivity