电解质
分离器(采油)
材料科学
离子电导率
化学工程
电池(电)
纳米纤维
电导率
聚合物
膜
纳米技术
电极
复合材料
化学
物理化学
物理
工程类
热力学
功率(物理)
量子力学
生物化学
作者
Dongli Chen,Ming Zhu,Peibin Kang,Tao Zhu,Haocheng Yuan,Jinle Lan,Xiaoping Yang,Gang Sui
标识
DOI:10.1002/advs.202103663
摘要
Abstract Lithium metal battery (LMB) possessing a high theoretical capacity is a promising candidate of advanced energy storage devices. However, its safety and stability are challenged by lithium dendrites and the leakage of liquid electrolyte. Here, a self‐enhancing gel polymer electrolyte (GPE) is created by in situ polymerizing 1,3‐dioxolane (DOL) in the nanofibrous skeleton for enabling safe LMB. The nanofiber membrane possesses a better affinity with poly‐DOL (PDOL) than commercial separator for constructing homogeneous GPE with enhanced ion conductivity. Furthermore, polydopamine is introduced on nanofiber membrane to form hydrogen bonding with PDOL and bis((trifluoromethyl)sulfonyl)imide anion, dramatically improving the mechanical strength, ionic conductivity, and transference number of GPE. Besides, molecular dynamic simulation is used to reveal the intrinsic factors of high ionic conductivity and reinforcing effect in the meantime. Consequently, the LiFePO 4 //Li batteries using self‐enhancing GPE show extraordinary cyclic stability over 800 cycles under high current density of 2 C, with a capacity decay of 0.021% per cycle, effectively suppressing the growth of lithium dendrites. This ingenious strategy is expected to manufacture advanced performance and high safety LMBs and compatible with the current battery production.
科研通智能强力驱动
Strongly Powered by AbleSci AI