文献类型：期刊文献

英文题名：Constructing sodiophilic interconnected ion-transport channels towards a stable Na-metal anode

作者：Ding, Yi[1];Guo, Min[1];Zhang, Yawei[1];Lu, Song[1];Ying, Jiadi[1];Wang, Yeqing[1];Liu, Tiancun[1];Yu, Zhixin[1]

机构：[1]Shaoxing Univ, Inst New Energy, Sch Chem & Chem Engn, Shaoxing 312000, Peoples R China

年份：2024

卷号：12

期号：31

起止页码：20137

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：SCI-EXPANDED(收录号：WOS:001270896400001)、、EI(收录号：20242916730786)、Scopus(收录号：2-s2.0-85198998815)、WOS

基金：This work was supported by the Zhejiang Provincial Natural Science Foundation of China (No. LQ23B030005) and National Natural Science Foundation of China (No. 22208220).

语种：英文

外文关键词：Anodes - Deposition - Rolling - Sodium - Sodium compounds - Solid electrolytes

外文摘要：Electrochemical cells utilizing metals (e.g., Li, Na, K) as anodes have sparked significant interest in both academia and industry. However, the rapid growth of sodium dendrites and irregular deformation are limiting the usage of sodium metal anodes. Fast ion transport is crucial for metal deposition and stripping. Herein, we fabricated a hybrid metal anode by physically mixing superionic conductor Na3V2(PO4)3 particles with sodium metal using a facile and scalable rolling and folding method. The superionic conductor particles with high affinity for Na+ are beneficial for charged Na-ion channels formation. These channels serve as reservoirs to continuously release and deliver sodium ions, compensating for the ionic flux of the electrolyte. Moreover, the interconnected Na+-conducting channels also reduce the diffusion barrier and accelerate Na+ migration, thereby homogenizing the local Na-ion flux and steering uniform Na deposition. These characteristics collectively contribute to dendrite-free Na electrodeposition and long cycle life (over 1000 h for 2 mA h cm-2 at 0.5 mA cm-2) in symmetric cells. Remarkably, when paired with Na3V2(PO4)3 cathodes, the full cell achieves high capacity retention (87.8% after 1000 cycles at a current density of 5C) and excellent rate performance (57.3 mA h g-1 at 50C). Tuning the electrochemical behaviors of Na metal anodes via building Na+-conducting channels through a facile rolling and folding method.