阳极
法拉第效率
材料科学
静电纺丝
金属
纳米技术
枝晶(数学)
化学工程
电流密度
储能
碳纤维
电极
电解质
复合材料
冶金
化学
聚合物
功率(物理)
几何学
物理化学
数学
工程类
物理
复合数
量子力学
作者
Byung Gon Kim,Dong Woo Kang,Gumjae Park,Sung Hyeon Park,Sang‐Min Lee,Jang Wook Choi
标识
DOI:10.1016/j.cej.2021.130017
摘要
Li-metal has steadily gained attention as one of the promising next-generation anode materials because of its exceptional specific capacity and low operating potential that can significantly increase the energy density of batteries beyond those of the state-of-the-art Li-ion batteries. Nevertheless, the use of Li-metal is still faced with the challenge of uncontrollable dendrite growth that ceaselessly causes parasitic reactions, further impeding the practical use of Li-metal batteries. To circumvent this limitation by using a structural approach, herein, we report a 1D hollow carbon fiber incorporating lithiophilic Au nanoparticles ([email protected]) as a promising Li host that is fabricated by scalable dual-nozzle electrospinning. Due to its well-defined 1D electronic conducting pathways for reducing the effective current density as well as the hollow core for confining Li-metal, [email protected] can mitigate Li dendrite growth on the top surface and stabilize the solid-electrolyte interphase layer, thereby achieving a high Coulombic efficiency of 99–99.9% under 1 mA cm−2 and 2 mAh cm−2. Moreover, the LiFePO4 full cell combined with the [email protected] anode containing predeposited 2 mAh cm−2 Li showed considerably improved cycle life of over 380 cycles, indicating that the design concept for the Li-confinable structure can be an excellent option for realizing emerging Li-metal batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI