Stable Lithium Metal Anode Achieved by In Situ Grown CuO Nanowire Arrays on Cu Foam

Abstract

Lithium is deemed as the anticipated anode for the next-generation energy storage system. Nevertheless, its commercial application is greatly hindered by the uneven deposition and volume expansion in the process of lithium plating and stripping. Here, a three-dimensional lithiophilic current collector with in situ grown CuO nanowire arrays on Cu foam has been demonstrated to effectively ameliorate the above problems. Beneficial from the large specific surface area and lithiophilicity properties, CuO nanowire arrays prominently diminish the local current density and nucleation overpotential, resulting in uniform lithium deposition. Moreover, the optimized anode exhibits a prolonged lifespan for more than 280 cycles at 0.5 mA cm–2 and a high coulombic efficiency of 95.5% for over 150 cycles at 3 mA cm–2 in an assembled half cell, which is maintained steadily for 540 h in a symmetric cell with good capacity retention capabilities in a full cell. This facile approach provides a feasible strategy to realize stable lithium deposition and a high-performance lithium metal anode.

Multifunctional roles of carbon‐based hosts for Li‐metal anodes: A review

“…4 To take the above advantages and bypass the corresponding disadvantages, tremendous efforts have been made, mainly focusing on electrolytes (additives, 5,6 superconcentrated electrolytes, 7 solid-state electrolytes, 8 etc. ), interfaces between electrolytes and electrodes (artificial SEI, 9,10 modified separators, 11,12 etc. ), and structured anodes.…”

In Situ Investigation of the Cu/CH3NH3PbI3 Interface in Perovskite Device

“…[ 29 ] After the deposition of 2 nm Cu, two small Cu 2p peaks appear at 932.9 and 952.7 eV (an enlarged figure is shown in Figure S4, Supporting Information), which are assigned to Cu 2p 3/2 and 2p 1/2 , respectively. [ 30 ] This signal gets intensified with the increase of the Cu thicknesses. Since no strong satellite peak between Cu 2p 3/2 and 2p 1/2 peaks is observed after Cu deposition, we can rule out the formation of Cu 2+ .…”

Nano‐Cone Structured Lithiophilic Ni Film on Cu Current Collector Facilitates Li+ Ion Diffusion Toward Uniform Lithium Deposition

“…[10] To address these issues, significant progress has been achieved in liquid electrolyte additives, [11][12][13][14] artificial solid electrolyte interphase (SEI), [15][16][17][18] polymer and solid electrolyte, [19][20][21][22] separator coating, [23][24][25][26] and 3D porous current collectors. [27][28][29][30][31][32][33][34][35][36][37][38][39][40] Among these strategies, the use of 3D porous current collectors is an efficient and convenient method to be capable of suppressing the growth of Li dendrites, because 3D conductive scaffolds with high specific surface area can provide sufficient surface areas and diffusion channels to balance the charge transport and transfer of lithium ions, diminish the local current density and reduce the nucleation overpotential. [41] Due to those advantages, the nanostructures prepared by electroplating are often used in lithium metal anode current collectors.…”

“…For example, Huan Ye et al [27] suppress lithium dendrites through 3D Cu fibers, depositing a nanoscale Al layer on a 3D Cu current collector to direct Li nucleation and suppress the growth of Li dendrites. Similarly, Jiaqi Cao et al [28] construct a 3D lithiophilic current collector with in situ grown CuO nanowire arrays on Cu foam, which provides a lot of lithium deposition sites and the lithophilicity of CuO can guide lithium uniform deposition. However, the microstructure of 3D current collectors are aligned in a vertical direction, [27][28][29][38][39][40][41][42] where the pathway of Li ion migration can be gradually blocked by previously deposited Li on the top of the microstructure.…”