Homogeneous Metallic Deposition Regulated by Porous Framework and Selenization Interphase Toward Stable Sodium/Potassium Anodes

Fanfan Liu; Lifeng Wang; Fangxin LingXuefeng ZhouYu JiangYu YaoHai YangYu ShaoXiaojun WuXianhong RuiChuanxin HeYan Yu

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Homogeneous Metallic Deposition Regulated by Porous Framework and Selenization Interphase Toward Stable Sodium/Potassium Anodes

机译：Homogeneous Metallic Deposition Regulated by Porous Framework and Selenization Interphase Toward Stable Sodium/Potassium Anodes

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Sodium (Na) metal has been considered as the most promising anode forachieving next-generation battery system with high energy density and lowcost. Nevertheless, the uncontrolled dendrites growth, infinite volume expansionand unstable solid/electrolyte interphase severely hinder the practicalapplication of Na metal anode. Herein, a functional composite Na anode(Na_2Se/Cu@Na) is achieved via infusing molten Na into the porous copperframework modified by cuprous selenide nanosheets. Combining experimentalstudies and theoretical calculations, the 3D framework and derivatives ofNa_2Se/Cu can synergistically buffer the volume expansion, redistribute Na+flux, promote ions migration, and induce uniform Na~+ deposition. Benefitingfrom these merits, the symmetrical cell of Na_2Se/Cu@Na demonstrates astable cycle lifespan over 500 h at 1 mA cm~(?2) in carbonate electrolyte. Andthe full battery paired with Na_3V_2(PO_4)_3 cathode delivers a stable capacity of97 mAh g~(?1) after 800 cycles at 10 C. Furthermore, this structured framework canalso be employed to construct composite potassium (K) anode and an outstandingcycle performance is achieved in the symmetrical cell (operating for1000 h at 0.5 mA cm~(?2)). This study paves a significant way of designing structuredNa (K) metal anodes for synergistically improving the electrode stability.

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《Advanced functional materials》 |2022年第49期|2210166.1-2210166.11|共11页
作者
Fanfan Liu; Lifeng Wang; Fangxin LingXuefeng ZhouYu JiangYu YaoHai YangYu ShaoXiaojun WuXianhong RuiChuanxin HeYan Yu;
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作者单位

College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060, China College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060, China Hefei National Research Center for Physical Sciences at the Microscale,D;

Hefei National Research Center for Physical Sciences at the Microscale,Department of Materials Science and Engineering, CAS Key Laboratoryof Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026, China;

Jiujiang DeFu Technology Co., Ltd.Jiujiang, Jiangxi 332000, ChinaSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou, Guangdong 510006, ChinaCollege of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060, ChinaHefei National Research Center for Physical Sciences at the Microscale,Department of Materials Science and Engineering, CAS Key Laboratoryof Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei 230026, China National Synchrotr;

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Na (K) metal anodes; Na (K) metal batteries; porous frameworks; selenization interphases; structured composite anodes;

Homogeneous Metallic Deposition Regulated by Porous Framework and Selenization Interphase Toward Stable Sodium/Potassium Anodes

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