首页|Na3P interphase reduces Na nucleation energy enabling stable anode-less sodium metal batteries

Na3P interphase reduces Na nucleation energy enabling stable anode-less sodium metal batteries

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Sodium metal batteries(SMBs)are rising as viable alternatives to lithium-ion systems due to their supe-rior energy density and sodium's relative abundance.However,SMBs face significant impediments,par-ticularly the exceedingly high negative-to-positive capacity ratios(N/P ratios)which severely encumber energy density and hinder their practical application.Herein,a novel nucleophilic Na3P 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 condition.This 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.

Anode-lessPhosphorus anodeNucleation buffer layerSodium metalDendrite-free

Haizhao Yang、Haifeng Lv、En Zhou、Xiaohao Ji、Chunnian Chen、Haolei Yu、Zhaowei Sun、Dawei Zhang、Hongchang Jin、Xianghua Kong、Hengxing Ji

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Department of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,Anhui,China

Hefei National Research Center for Physical Sciences at the Microscale,School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,Anhui,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaDNL cooperation Fund,CASNational Key R&D Program of ChinaAnhui Provincial Natural Science Foundation

221259022210915022279126U203220221975243DNL2020202022YFA15041012108085QB65

2024

10.1016/j.jechem.2024.05.004

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.96(9)