A dual-network structured poly (m-phenylene isophthalamide) nanofiber separator with Li6.4La3Zr1.4Ta0.6O12 for dendrite-free and high-safety lithium-metal batteries

Zhao, Huijuan; Zhao, Guodong; Liu, Fengquan; Lan, Feifei; Zhou, Jianjun; Li, Lin

doi:10.1016/j.cej.2024.151559

Cited by 7 publications

(1 citation statement)

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“…Several strategies have been adopted to improve the thermal stability and safety of separators, − including utilizing intrinsic thermal-safety materials to prepare separators (e.g., Al 2 O 3 /polyvinylidene fluoride separators and nanoporous polyimide membranes), ,− preparing nonflammable gel/solid electrolytes, , and surface modification by adding thermal-resistance inorganic ceramic coating on commercial separators (e.g., SiO 2 and halloysite). ,, Among them, ceramic nanofiber separators are one of the effective and workable ways to improve the safety and satisfactory electrochemical performances of LIBs. Compared to traditional nanoparticles or nanorods of inorganic materials that often have no satisfactory film-forming ability and can only be used as fillers, inorganic ceramic fibers have extremely high thermal stability, flexibility, and processability. ,− For instance, Jing et al prepared pure ZrO 2 nanowire separators through sol-assisted electrospinning.…”

Section: Introductionmentioning

confidence: 99%

Mechanically Robust and Safe Separators Based on Inorganic Nanofibers for Lithium-Ion Batteries

Sun,

Liu,

Sang

et al. 2024

ACS Appl. Energy Mater.

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Commercial polyolefin separators suffer from inferior electrolyte affinity, low thermal stability, and other serious safety concerns. Ceramic separators are promising alternatives to alleviate these issues, but the fragile structure restricts practical applications. A mechanically robust, high-safety, and flame-retardant composite separator (BHLP) of a hierarchical cross-linked architecture is constructed based on a multibond reinforcement mechanism. The inorganic and organic components of the separator are tightly integrated through electrostatic forces, hydrogen bonds, and chemical bonds. The as-prepared separator exhibits high tensile strength (16.28 MPa), which is approximately 1.7 times that of the PP separator in the transverse direction. Benefiting from the excellent thermal stability and high aspect ratio of hydroxyapatite nanowires, the thermal shrinkage of the BHLP separator is negligible after heating at 200 °C for 1 h and it features with has a highly porous nanostructure, good electrolyte affinity, and high ionic conductivity (0.87 mS cm −1 ). The LiNi 0.8 Co 0.1 Mn 0.1 O 2 ||graphite full cell with the BHLP separator performs a high specific discharge capacity (184.7 mA h g −1 ) at 0.1C and outstanding cycling stability with the capacity retention of 93.9% over 100 cycles at room temperature.

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