Lithiophilic Sb surface modified Cu nanowires grown on Cu foam: a synergistic 1D@3D hierarchical structure for stable lithium metal anodes. Issue 44 (2nd November 2021)

• Record Type: Journal Article
• Authors: Fu, Xuelian; Shang, Chaoqun; Zhou, Guofu; Wang, Xin
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 44(2021)
• Page Start: 24963
• Page End: 24970
• Publication Date: 2021-11-02
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1ta08004k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A hierarchical structured 1D@3D-Cu/Sb Li host with a large specific surface area and good lithiophilicity was fabricated to achieve dendrite-free Li deposition and improve the long-term cycling stability of a Li metal anode. Abstract : The uncontrollable lithium (Li) dendrite growth during repeated cycles is a safety risk and is an undesirable electrochemical property of Li metal batteries (LMBs) that hinders the commercialization of LMBs. To realize a dendrite-free Li anode, a hierarchical lithiophilic current collector was fabricated with Sb modified Cu nanowires on Cu foam (1D@3D-Cu/Sb). The 3D porous Cu foam scaffolds have ample space which can buffer the volume changes and provide a reduced local current density. Moreover, the Sb modified 1D Cu nanowires with a secondary structure of an homogenized Li + flux provide numerous lithiophilic sites for uniform Li + deposition, further suppressing the Li dendrite formation. Consequently, the 1D@3D-Cu/Sb as a Li host operates for over 900 h with a low overpotential (∼11 mV) without intense voltage fluctuation for symmetrical cells. Furthermore, the full cells pairing Li-deposited 1D@3D-Cu/Sb with a LiFePO4 (LFP) cathode achieves promising cycling stability for 200 cycles at 0.5C.