阳极
电解质
材料科学
聚丙烯腈
阴极
静电纺丝
锂(药物)
化学工程
纳米纤维
电池(电)
电极
纳米技术
复合材料
聚合物
电气工程
化学
医学
功率(物理)
物理
物理化学
量子力学
内分泌学
工程类
作者
Yuhang Liu,Wanqing Guan,Siyu Li,Jingxuan Bi,Xiaoqi Hu,Zhuzhu Du,Hongfang Du,Wei Ai,Wei Huang
标识
DOI:10.1002/aenm.202302695
摘要
Abstract Lithium metal anodes (LMAs) offer substantial promise for high‐energy‐density rechargeable batteries, but managing the complex electrolyte–anode interface is a challenge. Herein, a sustainable dual‐layered interface (SDI) protected Li anode is developed using a joint electrospinning‐rolling technique. In this SDI, polyacrylonitrile (PAN) nanofibers normalize Li‐ion flux across the bulk electrolyte and mitigate electrode volume expansion. More significantly, the continuous release of lithiophilic metal ions aids in constructing alloy interphase in situ, which facilitates Li‐ion transport and uniform lithium deposition. With the dynamic protection of SDI films, cracks in the alloy layer can be promptly repaired during cycling, ensuring efficient control of the electrolyte–anode interface and prolonged stabilization of LMAs. As validation, using a PAN/SnCl 2 film as an SDI prototype, the symmetric cells achieve ultra‐long cycling of 5200 h (≈7 months) at 5 mA cm −2 and 5 mAh cm −2 . When paired with a sulfur cathode (in ether electrolyte) or a LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode (in ester electrolyte), the full cells exhibit exceptional stability and rate performance. This sustainable protection strategy for LMAs opens a path to suppress dendrite growth, creating new opportunities for advanced lithium metal batteries.
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