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Na_(3)P interphase reduces Na nucleation energy enabling stable anode-less sodium metal batteries

Journal of Energy Chemistry 2024年第9期96卷 448-455页

作者： Haizhao Yang Haifeng Lv En Zhou Xiaohao Ji Chunnian Chen Haolei Yu Zhaowei Sun Dawei Zhang Hongchang Jin Xianghua Kong Hengxing Ji Department of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009AnhuiChina Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

Sodium metal batteries(SMBs)are rising as viable alternatives to lithium-ion systems due to their superior energy density and sodium's relative ***,SMBs face significant impediments,particularly the exceedingly high negative-to-positive capacity ratios(N/P ratios)which severely encumber energy density and hinder their practical ***,a novel nucleophilic Na_(3)P interphase on aluminum foil has been designed to significantly lower the nucleation energy barrier for sodium atom deposition,resulting in a remarkable reduction of nucleation overpotential and efficient mitigation of dendritic growth at high sodium deposition of 5 mA h cm^(−2).The interphase promotes stable cycling in anode-less SMB configurations with a low N/P ratio of 1.4 and high cathode mass loading of 11.5 mg cm^(−2),and demonstrates a substantial increase in high capacity retention of 92.4%after 500 cycles even under 1 C rate *** innovation signifies a promising leap forward in the development of high-energy-density,anode-less SMBs,offering a potential solution to the longstanding issues of cycle stability and energy efficiency.

关键词： Anode-less Phosphorus anode nucleation buffer layer Sodium metal Dendrite-free

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Double interface regulation: Toward highly stable lithium metal anode with high utilization

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InfoMat 2022年第7期4卷 147-159页

作者： Guanyao Wang Ming Zhu Ying Zhang Chan Song Xiaolong Zhu Zhongyi Huang Yuanjun Zhang Fangfang Yu Gang Xu Minghong Wu Hua-Kun Liu Shi-Xue Dou Chao Wu School of Environmental and Chemical Engineering Shanghai UniversityShanghaiChina Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongWollongongNew South WalesAustralia School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjingJiangsuChina Key Laboratory of Organic Compound Pollution Control Engineering(MOE) Shanghai UniversityShanghaiChina

The undesirable Li dendrite growth and other knock-on issues have signifi-cantly plagued the application of Li metal anodes(LMAs).Herein,we report that the synergistic regulation of double interfaces adjacent to the metallic Li anode can effectively prevent the dendritic Li growth,significantly improving the cycling performance of LMAs under harsh conditions including high cur-rent density and high depth of *** comparison of electrolytes demonstrated that 1 M lithium bis(fluorosulfonyl)imide(LiFSI)in 1,2-dimethoxyethane(DME)can yield a robust and lithiophobic LiF-rich upper interface(solid electrolyte interphase).Besides,the Sb-based buffer layer forms a lithiophilic lower interface on current *** synergy of the upper and lower interfacial engineering plays an important role for outstanding cyclability of ***,the plating/stripping of Li can be stably repeated for 835 and 329 cycles with an average Coulombic efficiency(CE)above 99%at 1 and 3 mA h cm?2,***,the Li||Li symmetric cell can even withstand the baptism of current density up to 20 mA cm?*** excellent performance validates that the facile synergistic regulating of interfaces adjacent to the metallic Li anode provides an effective pathway to stabilize LMAs.

关键词： dendrite suppression electrolytes lithium metal anodes nucleation buffer layer solid electrolyte interphase

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