文献类型：期刊文献

英文题名：Regulating the Uniform Na Deposition Behavior Using Atomically Dispersed Fe-Doped Mesoporous Carbon Nanospheres for High-Performance Sodium Metal Batteries

作者：Wei, Chi[2];Huang, Gaoxu[2];Mao, Jiayi[2];Cai, Jia[2];Jin, Xiaopan[2];Guan, Mengjia[2];Yu, Feng[1];Dai, Bin[1];Li, Yongsheng[2]

机构：[1]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;[2]East China Univ Sci & Technol, Frontier Sci Ctr Mat Biol & Dynam Chem, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Lab Low Dimens Mat Chem,Key Lab, Shanghai 200237, Peoples R China

年份：2022

卷号：5

期号：9

起止页码：10446

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;EI(收录号：20223512659196);WOS:【SCI-EXPANDED(收录号:WOS:000862498900001)】；

基金：National Natural Science Foundation of China (nos. 51621002, 51972112, and 22005096) the Leading Talents in Shanghai in 2018 and the 111 project (B14018).

语种：英文

外文关键词：mesoporous carbon nanospheres; atomically dispersed Fe; sodium metal anode; uniform deposition; sodiophilic host

摘要：Sodium metal batteries (SMBs) are attracting intensive attention as an appealing candidate for high-energy-density batteries, owing to the high specific capacity, rich abundance, and low cost of metallic sodium (Na). However, the practical application of SMBs has been greatly hindered by the uncontrollable dendrite growth and unstable solid electrolyte interfaces, which are responsible for the poor Na stripping/plating reversibility and short lifespan. Herein, we report an atomically dispersed Fe-doped mesoporous carbon nanosphere (Fe-MCN) as a sodiophilic host for facilitating homogeneous Na nucleation and deposition behaviors. Benefitting from the advantages of uniform mesoporous structures with large surface areas and atomically dispersed Fe doped in the carbon nanospheres, low nucleation barriers and subsequent homogeneous deposition behavior of Na metal are achieved, which give rise to highly reversible stripping/plating performance and outstanding cycling stability. As a result, the Na||Cu cell based on Fe-MCN-modified Cu substrates exhibits outstanding electrochemical performance with a high Coulombic efficiency of 99.97% over 850 cycles, and an ultralong cycling lifespan of 2600 h at 1 mA cm-2 and 1 mA h cm-2 is demonstrated by the symmetric cell with Na@Fe-MCN@Cu anodes. Moreover, the Na3V2(PO4)3 full cell based on the Na@Fe-MCN@Cu anode guarantees outstanding cycling stability for 2000 cycles with a capacity retention as high as 84%, showing high potential in the practical application of SMBs.