法拉第效率
阳极
成核
材料科学
阴极
电化学
电极
碳纳米纤维
枝晶(数学)
化学工程
复合数
纳米颗粒
纳米纤维
纳米技术
电流密度
复合材料
碳纳米管
化学
有机化学
工程类
几何学
数学
物理
物理化学
量子力学
作者
Xuan Lu,Ruochen Chen,Shenyu Shen,Yuyang Li,Hongyang Zhao,Hongkang Wang,Tiantian Wu,Yaqiong Su,Jianmin Luo,Xiaofei Hu,Shujiang Ding,Weiyang Li
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-04-24
标识
DOI:10.1021/acs.nanolett.4c00562
摘要
The sodium (Na) metal anode encounters issues such as volume expansion and dendrite growth during cycling. Herein, a novel three-dimensional flexible composite Na metal anode was constructed through the conversion-alloying reaction between Na and ultrafine Sb2S3 nanoparticles encapsulated within the electrospun carbon nanofibers (Sb2S3@CNFs). The formed sodiophilic Na3Sb sites and the high Na+-conducting Na2S matrix, coupled with CNFs, establish a spatially confined "sodiophilic-conductive" network, which effectively reduces the Na nucleation barrier, improves the Na+ diffusion kinetics, and suppresses the volume expansion, thereby inhibiting the Na dendrite growth. Consequently, the Na/Sb2S3@CNFs electrode exhibits a high Coulombic efficiency (99.94%), exceptional lifespan (up to 2800 h) at high current densities (up to 5 mA cm–2), and high areal capacities (up to 5 mAh cm–2) in symmetric cells. The coin-type full cells assembled with a Na3V2(PO4)3/C cathode demonstrate significant enhancement in electrochemical performance. The flexible pouch cell achieves an excellent energy density of 301 Wh kg–1.
科研通智能强力驱动
Strongly Powered by AbleSci AI