Present and future of functionalized Cu current collectors for stabilizing lithium metal anodes

Abstract

Li metal has been recognized as the most promising anode materials for next-generation high-energy-density batteries, however, the inherent issues of dendrite growth and huge volume fluctuations upon Li plating/stripping normally result in fast capacity fading and safety concerns. Functionalized Cu current collectors have so far exhibited significant regulatory effects on stabilizing Li metal anodes (LMAs), and hold a great practical potential owing to their easy fabrication, low-cost and good compatibility with the existing battery technology. In this review, a comprehensive overview of Cu-based current collectors, including planar modified Cu foil, 3D architectured Cu foil and nanostructured 3D Cu substrates, for Li metal batteries is provided. Particularly, the design principles and strategies of functionalized Cu current collectors associated with their functionalities in optimizing Li plating/stripping behaviors are discussed. Finally, the critical issues where there is incomplete understanding and the future research directions of Cu current collectors in practical LMAs are also prospected. This review may shed light on the critical understanding of current collector engineering for high-energy-density Li metal batteries.

Facile and Scalable Synthesis of Self-Supported Zn-Doped CuO Nanosheet Arrays for Efficient Nitrate Reduction to Ammonium

“…However, too fast etching rate in turn brings excess Cu 2 O unit, which tends to grow into large-sized crystals before further oxidation, such as the case of 1.0 M NaOH. , Accordingly, the morphology and crystal structure of the final products could be controlled by tuning the concentration of NaOH solution. Note that, different from the reported techniques that require tedious procedures for preparing heteroatom-doped CuO, ,,,, our approach is particularly valuable for scalable synthesis because of its low cost and simplicity.…”

Covalent triazine frameworks for advanced energy storage: challenges and new opportunities

“…Li metal has been recognised as a highly promising anode material for next-generation batteries, owing to its exceptional energy density (e.g., 350 W h kg À1 in Li-LiNi 0.8 Co 0.1 Mn 0.1 O 2 batteries). 117 However, the inherent issues of dendrite growth and volume expansion during Li plating/stripping often lead to capacity decay and safety hazards. Significant progress has been made in materials science and engineering to tackle dendrite growth, while novel electrolytes and additives are being developed to enhance battery stability and cycling performance.…”

Recent developments in current collectors for lithium metal anodes

“…9,10 CCs are used to support the active materials, collect the electrons involved in the electrochemical reaction, deliver the electrons between the electrode materials and the external circuit, and release the thermal heat generated during the electrochemical process. [11][12][13][14] A typical CC should be electronically conductive, ionically insulated, electrochemically inactive, mechanically robust, and cost-effective. As the potential at the Li anode side is approximately 0 V, the CC at the Li metal side should not react with lithium or the electrolyte in such a reduction environment.…”