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A Co-MOF decorated gel separator with high safety and stable electrochemical performance for lithium-sulfurized poly(acrylonitrile) batteries
Electrochimica Acta ( IF 5.5 ) Pub Date : 2025-01-26 , DOI: 10.1016/j.electacta.2025.145757
Yun Zhang, Runhe He, Hao Liu, Haihui Liu, Xing-xiang Zhang
Electrochimica Acta ( IF 5.5 ) Pub Date : 2025-01-26 , DOI: 10.1016/j.electacta.2025.145757
Yun Zhang, Runhe He, Hao Liu, Haihui Liu, Xing-xiang Zhang
In this work, a high-temperature-tolerant poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)-based gel polymer electrolyte (GPE) separator was fabricated for lithium-sulfurized poly(acrylonitrile) (Li-SPAN) batteries through a one-step electrospinning process. The ZIF-67/PMIA@PVDF-HFP (MOF-PPH) separator, enhanced by the synergistic effects of ZIF-67 and poly(m-phenylene isophthalamide) (PMIA), exhibited remarkable thermal stability, maintaining dimensional integrity at 200°C, robust tensile strength (14.96 MPa), and superior electrolyte absorption (704%). In addition, abundantly dispersed ZIF-67 nanoparticles, characterized by a uniform microporous size and high specific surface area, facilitated the uniform deposition of Li+ and effectively suppressed the disordered growth of lithium dendrites. The Li-SPAN battery equipped with the MOF-PPH separator demonstrated significantly improved cycling stability, with a discharge capacity of 1406.1 mAh g−1 and a capacity retention rate of 95.6% after 200 cycles at 0.2 C. Furthermore, the MOF-PPH separator showed steady cycling behavior, even under high sulfur loading, lean electrolyte, and elevated operating temperature conditions. This result highlights its potential for future energy storage systems that provide high safety and performance.
中文翻译:
一种用于锂硫化聚丙烯腈电池的具有高安全性和稳定电化学性能的 Co-MOF 修饰凝胶隔膜
在本工作中,通过一步静电纺丝工艺为锂硫化聚丙烯腈 (Li-SPAN) 电池制造了一种基于耐高温的聚偏二氟乙烯-六氟丙烯烃 (PVDF-HFP) 凝胶聚合物电解质 (GPE) 隔膜。ZIF-67/PMIA@PVDF-HFP (MOF-PPH) 隔膜在 ZIF-67 和聚(间苯基间苯二甲酰胺)(PMIA) 的协同作用下表现出卓越的热稳定性,在 200°C 下保持尺寸完整性、强大的拉伸强度 (14.96 MPa) 和优异的电解质吸收 (704%)。此外,大量分散的 ZIF-67 纳米颗粒具有均匀的微孔尺寸和高比表面积的特点,促进了 Li + 的均匀沉积,并有效抑制了锂枝晶的无序生长。配备 MOF-PPH 隔膜的 Li-SPAN 电池表现出显着提高的循环稳定性,在 0.2 C 下循环 200 次后,放电容量为 1406.1 mAh g −1 ,容量保持率为 95.6%。此外,MOF-PPH 隔膜表现出稳定的循环行为,即使在高硫负载、稀电解质和高温条件下也是如此。这一结果凸显了其在未来储能系统中提供高安全性和性能的潜力。
更新日期:2025-01-26
中文翻译:
一种用于锂硫化聚丙烯腈电池的具有高安全性和稳定电化学性能的 Co-MOF 修饰凝胶隔膜
在本工作中,通过一步静电纺丝工艺为锂硫化聚丙烯腈 (Li-SPAN) 电池制造了一种基于耐高温的聚偏二氟乙烯-六氟丙烯烃 (PVDF-HFP) 凝胶聚合物电解质 (GPE) 隔膜。ZIF-67/PMIA@PVDF-HFP (MOF-PPH) 隔膜在 ZIF-67 和聚(间苯基间苯二甲酰胺)(PMIA) 的协同作用下表现出卓越的热稳定性,在 200°C 下保持尺寸完整性、强大的拉伸强度 (14.96 MPa) 和优异的电解质吸收 (704%)。此外,大量分散的 ZIF-67 纳米颗粒具有均匀的微孔尺寸和高比表面积的特点,促进了 Li + 的均匀沉积,并有效抑制了锂枝晶的无序生长。配备 MOF-PPH 隔膜的 Li-SPAN 电池表现出显着提高的循环稳定性,在 0.2 C 下循环 200 次后,放电容量为 1406.1 mAh g −1 ,容量保持率为 95.6%。此外,MOF-PPH 隔膜表现出稳定的循环行为,即使在高硫负载、稀电解质和高温条件下也是如此。这一结果凸显了其在未来储能系统中提供高安全性和性能的潜力。