首页|Constructing Lithium-Free Anode/Separator Interface via 3D Carbon Fabric Scaffold for Ultrasafe Lithium Metal Batteries

Constructing Lithium-Free Anode/Separator Interface via 3D Carbon Fabric Scaffold for Ultrasafe Lithium Metal Batteries

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Metallic lithium represents a promising anode candidate to be utilized in future high-energy lithium batteries.However,the undesirable dendrite growth and fragile solid-electrolyte interphase(SEI)pose critical challenge for pursuing further practical application.In contrast to traditional approaches of using inert/lithiophilicity coating,here,we demonstrate a reverse strategy of introducing a highly conductive and lithophobic carbon fabric(CF)scaffold on lithium foil to guide a favorable nucleation site of lithium far away from the anode/separator interface.The CF scaffold with high conductivity can couple with inner electric field for achieving a uniform distribution of the lithium-ion flux,while the lithophobic feature offers the condition to guide the preferred deposition of lithium onto the underlying lithium foil,which greatly reduces the risk of dendrite-induced short circuits.Moreover,the SEI immersed in the CF scaffold is well supported by CF fibers and therefore exhibits extremely high stability during charge-discharge cycles.As a result,the lithium/CF anodes show＞2,000-h stable cycling at 0.5 mA cm-2.Lithium metal batteries equipped with our lithium/CF anode deliver a high capacity retention of～99.99％per cycle,i.e.,retain～97.3％capacity after 200 cycles.The unique interface-regulation strategy is versatile for various conductive scaffolds(e.g.,ultrathin and ultralight conductive fabrics),exhibiting high superiority for highly safe lithium metal batteries.

Dongdong Li、Shengchen Yang、Zijian Zheng、Wen-Yong Lai

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State Key Laboratory of Organic Electronics and Information Displays(SKLOEID),Institute of Advanced Materials(IAM),School of Chemistry and Life Sciences,Nanjing University of Posts and Telecommunications,9 Wenyuan Road,Nanjing 210023,China

Department of Materials Chemistry,Huzhou University,1 Xueshi Road,Huzhou 313000,China

Laboratory for Advanced Interfacial Materials and Devices,School of Fashion and Textiles,Department of Applied Biology and Chemical Technology,Research Institute for Intelligent Wearable Systems(RI-IWEAR),Research Institute for Smart Energy(RISE),The Hong Kong Polytechnic University,Hong Kong SAR 999077,China

2024

10.34133/research.0267

研究(英文)

研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.2024(3)