材料科学
复合数
成核
阳极
过电位
阴极
电镀(地质)
化学工程
电解质
储能
功率密度
纳米技术
电化学
复合材料
电极
热力学
物理化学
功率(物理)
物理
工程类
化学
地球物理学
地质学
作者
Sundas Iqbal,Yanwei Ma,Bingqing Wei,M. Yasir Ali,Tingkai Zhao
标识
DOI:10.1021/acsami.2c22068
摘要
The practical applications of metallic anodes are limited due to dendritic growth, propagation in an infinite volume during the plating process, and parasitic interfacial reactions between sodium (Na) and the electrolyte. Herein, we developed Sb2S3 microrods as a template to regulate the nucleation of metallic Na. Additionally, the propagation of the deposited metal could be spatially regulated via a "nanoconfinement effect", that is, within the conformal hard carbon (C) layer of nanothickness. Moreover, we carefully studied the seed effect of the in situ-formed Na-Sb and Na-S alloys within the hard C sheath during the Na plating process. The symmetrical cells of the Sb2S3@C composite anode achieved dendrite-free cycling at 1 mA cm-2 for 1100 h at a high capacity loading of 1 mA h cm-2 and considerably mitigated a nucleation overpotential of 20 mV. Pairing a NaVPO4F (NVPF) cathode (4.6 mg cm-2) with an in situ presodiation Sb2S3@C composite (2*Na excess) prototype delivered a high energy density and a high power density of 173.75 W h kg-1 and 868.57 W kg-1, respectively. Therefore, this study provides tremendous possibilities for employing the proposed hybrid storage mechanism in low-cost and practical applications of high-energy-density Na metal batteries.
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