journal article·2025-02

The sp Hybridization of Tin Single Atoms for Dendrite‐Free Sodium Metal Batteries

Yaguang Li, Yuejiao Li, Jianmin Lu, Pengchao Wen, Liqiang Zhang, Qike Jiang, Haodong Shi, Caixia Meng, Junwei Sun, Yunna Guo, Yi Wang, Yu Yao, Shangshu Qian, Yan Yu, Jun Lu, Xinhe Bao, Zhong‐Shuai Wu

Advanced Materials· Volume 37· Issue 8
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Abstract

Abstract Restricting the growth of sodium (Na) dendrites at the atomic level is the premise to enable both the stability and safety of sodium metal batteries (SMBs). Here, the universal synthesis of the fourth main group element (Sn, Ge, Pb) as single metal atoms anchored on graphene (Sn, Ge, Pb SAs/G) with sp hybridization for dendrite‐free sodium metal anode is reported. The in situ real‐time observation of Na growth on Sn SAs/G uncoils a kinetically uniform planar deposition at the atomic level for substantially suppressing the dendrite growth. The symmetrical Sn SAs/G‐Na battery exhibits high Coulombic efficiency of 99.8% for 200 cycles, long‐term cyclability with 600 h at 4 mA cm−2, and ultralow overpotential of 40 mV at 8 mA cm−2. Further, the full batteries Na3V2(PO4)3||Sn SAs/G‐Na show unprecedented rate capability of 67 mAh g−1 at 20 C and a capacity retention as high as 91% after 500 cycles. The theoretical calculations of Na deposition on different M SAs/G (M═Sn, Ni, Zn, Fe, Co) reveal that the 5s 25p 2 electron configuration of Sn SAs/G realizes the planar deposition mechanism of Na clusters along the graphene plane. Therefore, this work provides an atom‐level accurate miniaturization strategy for constructing dendrite‐free SMBs.
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Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Zeolite Catalysis and Synthesis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China

Research Center for Solar Driven Carbon Neutrality Engineering Research Center of Zero‐carbon Energy Buildings and Measurement Techniques Ministry of Education The College of Physics Science and Technology Institute of Life Science and Green Development Hebei University Baoding 071002 China

Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China

Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China

Hefei National Research Center for Physical Sciences at the Microscale Department of Materials Science and Engineering CAS Key Laboratory of Materials for Energy Conversion University of Science and Technology of China Hefei Anhui 230026 China

College of Chemical and Biological Engineering Zhejiang University Hangzhou Zhejiang 310058 China

Funding

National Natural Science Foundation of China · State Key Laboratory of Catalysis · Natural Science Foundation of Hebei Province

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