A hybrid polymer protective layer with uniform Li<sup>+</sup> flux and self-adaption enabling dendrite-free Li metal anodes

Wei, Chaohui; Deng, Jin Xiang; Xing, Jianxiong; Wang, Zihao; Song, Zhicui; Wang, D.; Jiang, Jian; Wang, Xin; Zhou, Aijun; Zou, W.; Li, Jingze

doi:10.1039/d3na00248a

Nanoscale Adv.

2023

DOI: 10.1039/d3na00248a

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A hybrid polymer protective layer with uniform Li⁺ flux and self-adaption enabling dendrite-free Li metal anodes

Chaohui Wei¹,

Jin Xiang Deng²,

Jianxiong Xing³

et al.

Abstract: Lithium (Li) metal is considered as an ideal negative electrode material for next-generation secondary batteries; however, the hideous dendrite growth and parasitic reactions hinder the practical applications of Li metal...

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2024

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Cited by 4 publications

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Dynamic Interfacial Protection via Molecularly Tailored Copolymer for Durable Artificial Solid Electrolyte Interphase in Lithium Metal Batteries

Luo,

Huang,

Shi

et al. 2024

Adv Funct Materials

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The serious dendrite formation and safety hazards associated with side reactions hinder the practical application of lithium metal batteries. A molecular customization strategy based on both physical and chemical properties is reported. A copolymer of acrylamide and hexafluorobutyl acrylate molecules is used as an artificial solid electrolyte interface(ASEI) for lithium metal to achieve dynamic interface protection during cycling. The amide group serves as the rigid unit, while the hexafluorobutyl group serves as the flexible unit, and imparts excellent mechanical properties to the copolymer. Synergistically abundant C─F bonds exhibit excellent water and oxygen resistance and have good electrolyte affinity. The ester and amide groups serve as amphiphilic sites for Li+ and PF6−, regulating the ion flux at the interface and achieving dendrite‐free lithium deposition. During cycling, the organic–inorganic composite SEI dynamically evolves to safeguard the lithium metal, preventing undue electrolyte consumption. The copolymer achieves stable cycling for 1500 and 950 h at 1 and 2 mA cm−2, respectively. It demonstrates excellent performance with LiNi0.8Co0.1Mn0.1O2 and LiFePO4 cathodes. This study introduces a new approach to designing polymers at the molecular level to optimize the physical properties/chemical activity of lithium metal interfaces.

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Dynamic Interfacial Protection via Molecularly Tailored Copolymer for Durable Artificial Solid Electrolyte Interphase in Lithium Metal Batteries

Luo,

Huang,

Shi

et al. 2024

Adv Funct Materials

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Development and Optimization of Thin‐Lithium‐Metal Anodes with a Lithium Lanthanum Titanate Stabilization Coating for Enhancement of Lithium–Sulfur Battery Performance

Wang,

Chung

2024

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Lithium‐ion batteries are dominating high‐energy‐density energy storage for 30 years. However, their development approaches theoretical limits, spurring the development of lithium–sulfur cells that achieve high energy densities through reversible electrochemical conversion reactions. Nevertheless, the commercialization of lithium–sulfur cells is hindered by practical challenges associated primarily with the use of thick‐lithium anodes, low‐loading sulfur cathodes, and high electrolyte‐to‐sulfur ratios, which prevent realization of the cells’ full potential in terms of electrochemical and material performance. To solve these extrinsic and intrinsic problems, the effect of lithium‐metal thickness on the electrochemical behavior of lithium–sulfur cells with high‐loading sulfur cathodes in lean‐electrolyte configurations is investigated. Specifically, lithium lanthanum titanate (LLTO), a solid electrolyte, is utilized to form an ionically/electronically conductive coating to stabilize lithium‐metal anodes, thereby enhancing their lithium‐ion pathways and interfacial charge transfer. Electrochemical analyses reveal that an LLTO coating significantly reduces excessive reactions between lithium metal and an electrolyte, thereby minimizing lithium consumption and electrolyte depletion. Further, LLTO‐stabilized lithium anodes improve lithium–sulfur cell performance, and most importantly, allow the fabrication of thin‐lithium, high‐loading‐sulfur cells that open a pathway toward high‐energy‐density batteries.

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Li-Zn alloy patch for defect-free polymer interface film enables excellent protection effect towards stable Li metal anode

Wang,

Xue,

Song

et al. 2024

Chinese Chemical Letters

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A hybrid polymer protective layer with uniform Li⁺ flux and self-adaption enabling dendrite-free Li metal anodes

Abstract: Lithium (Li) metal is considered as an ideal negative electrode material for next-generation secondary batteries; however, the hideous dendrite growth and parasitic reactions hinder the practical applications of Li metal...

Cited by 4 publications

References 47 publications

Dynamic Interfacial Protection via Molecularly Tailored Copolymer for Durable Artificial Solid Electrolyte Interphase in Lithium Metal Batteries

Dynamic Interfacial Protection via Molecularly Tailored Copolymer for Durable Artificial Solid Electrolyte Interphase in Lithium Metal Batteries

Development and Optimization of Thin‐Lithium‐Metal Anodes with a Lithium Lanthanum Titanate Stabilization Coating for Enhancement of Lithium–Sulfur Battery Performance

Li-Zn alloy patch for defect-free polymer interface film enables excellent protection effect towards stable Li metal anode

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A hybrid polymer protective layer with uniform Li+ flux and self-adaption enabling dendrite-free Li metal anodes

Abstract: Lithium (Li) metal is considered as an ideal negative electrode material for next-generation secondary batteries; however, the hideous dendrite growth and parasitic reactions hinder the practical applications of Li metal...

Cited by 4 publications

References 47 publications

Dynamic Interfacial Protection via Molecularly Tailored Copolymer for Durable Artificial Solid Electrolyte Interphase in Lithium Metal Batteries

Dynamic Interfacial Protection via Molecularly Tailored Copolymer for Durable Artificial Solid Electrolyte Interphase in Lithium Metal Batteries

Development and Optimization of Thin‐Lithium‐Metal Anodes with a Lithium Lanthanum Titanate Stabilization Coating for Enhancement of Lithium–Sulfur Battery Performance

Li-Zn alloy patch for defect-free polymer interface film enables excellent protection effect towards stable Li metal anode

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A hybrid polymer protective layer with uniform Li⁺ flux and self-adaption enabling dendrite-free Li metal anodes