首页|A layered multifunctional framework based on polyacrylonitrile and MOF derivatives for stable lithium metal anode

A layered multifunctional framework based on polyacrylonitrile and MOF derivatives for stable lithium metal anode

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Composite Li metal anodes based on three-dimensional(3D)porous frameworks have been considered as an effective material for achieving stable Li metal batteries with high energy density.However,uneven Li deposition behavior still occurs at the top of 3D frameworks owing to the local accumulation of Li ions.To promote uniform Li deposition without top dendrite growth,herein,a layered multifunctional framework based on oxidation-treated polyacrylonitrile(OPAN)and metal-organic framework(MOF)derivatives was proposed for rationally regulating the distribution of Li ions flux,nucleation sites,and electrical con-ductivity.Profiting from these merits,the OPAN/carbon nano fiber-MOF(CMOF)composite framework demonstrated a reversible Li plating/stripping behavior for 500 cycles with a stable Coulombic efficiency of around 99.0％at the current density of 2 mA/cm2.Besides,such a Li composite anode exhibited a supe-rior cycle lifespan of over 1300 h under a low polarized voltage of 18 mV in symmetrical cells.When the Li composite anode was paired with LiFePO4(LFP)cathode,the obtained full cell exhibited a stable cycling over 500 cycles.Moreover,the COMSOL Multiphysics simulation was conducted to reveal the effects on homogeneous Li ions distribution derived from the above-mentioned OPAN/CMOF framework and elec-trical insulation/conduction design.These electrochemical and simulated results shed light on the diffi-culties of designing stable and safe Li metal anode via optimizing the 3D frameworks.

Lithium metal anodeLayered multifunctional frameworkIons flux redistributionElectrical insulation/conduction structureUniform Li deposition

Fanfan Liu、Peng Zuo、Jing Li、Pengcheng Shi、Yu Shao、Linwei Chen、Yihong Tan、Tao Ma

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Engineering Research Center of High-frequency Soft Magnetic Materials and Ceramic Powder Materials of Anhui Province,School of Chemistry and Material Engineering,Chaohu University,Hefei 238024,Anhui,China

School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,Guangdong,China

Jiujiang DeFu Technology Co.,Ltd.,Jiujiang 332000,Jiangxi,China

School of Pharmacy,Anhui University of Chinese Medicine,Hefei 230012,Anhui,China

Frontiers Science Center for Transformative Molecules,School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationAnhui Province University Natural Science Research ProjectAnhui Province University Natural Science Research ProjectStartup Research Fund of Chaohu UniversityStartup Research Fund of Chaohu University

5230229252302058523020852021M7022252023AH0300932023AH040301KYQD-2023005KYQD-2023051

2024

10.1016/j.jechem.2024.02.014

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)：2024.93(6)
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