首页|Synergizing 3D-printed structure and sodiophilic interface enables highly efficient sodium metal anodes

Synergizing 3D-printed structure and sodiophilic interface enables highly efficient sodium metal anodes

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Sodium(Na)metal batteries have gained increasing attention more recently,owing to their high energy densities and cost efficiencies,but are severely handicapped by the unsatisfactory Coulombic efficiency(CE)and cycling stability stemming from dendrite growth on Na anodes.In this study,we developed a strategy of direct ink writing(DIW)3D printing combined with electroless deposition to construct a hi-erarchical Cu grid coated with a dense nanoscale Ag interfacial layer as the host material for Na plating.The sodiophilic Ag interface contributes to a fall in the Na nucleation energy,hence enabling uniform Na deposition on each 3D-printed filament.The constructed 3D-printed structure can effectively mod-erate the electric-field distribution and lower the local current density for relieving Na inhomogeneous growth,as confirmed by finite element simulation and Na plating/stripping morphology evolution results.In particular,the unique 3D structure also promotes the lateral growth of Na,thus the volume change of Na metal was accommodated to stabilize the solid electrolyte interphase(SEI).As a result,the CE of the half-cell can reach 99.9％at the current density of 1 mA/cm2 after 300 cycles and the full-cell exhibits outstanding electrochemical performance(capacity retention of 91.0％after 500 cycles at 2 C).

3D-printed hostSodiophilic interfaceDendrite-freeHigh reversibilitySodium metal batteries

Changyuan Bao、Yunpeng Jiang、Haoyin Zhong、Huaizheng Ren、Junhui Wang、Binbin Liu、Qi Zhao、Fan Jin、Yan Meng Chong、Jianguo Sun、Fei Wang、Bo Wang、Ximeng Liu、Dianlong Wang、John Wang

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School of Chemical and Environmental Engineering,Yancheng Teachers University,Yancheng 224007,China

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,State Key Laboratory of Urban Water Resource and Environment,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China

Department of Materials Science and Engineering,National University of Singapore,Singapore 117575,Singapore

Institute of Materials Research and Engineering,Agency for Science,Technology and Research(ASTAR),Singapore 138634,Singapore

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2024

10.1016/j.cclet.2023.109353

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(11)