Synergizing Conformal Lithiophilic Granule and Dealloyed Porous Skeleton toward Pragmatic Li Metal Anodes

Abstract

Li metal is regarded as one of the most promising anodes for next‐generation rechargeable batteries. Nonetheless, infinite volume change and severe dendrite growth impede its practicability. To date, unremitting efforts have been devoted to stabilizing Li metal anode via the rational design of 3D current collectors. In this sense, optimizing Li nucleation behavior plays a pivotal role in alleviating the dendrite formation. Herein, a practically viable route is devised by in situ crafting lithiophilic CuSe granules on the dealloyed Cu skeleton (D‐Cu@CuSe). Persuasive electrochemical analysis and systematic theoretical calculation disclose the underlying Li nucleation mechanism on the CuSe overlayer. Impressively, the D‐Cu@CuSe‐Li symmetric cell can sustain a stable plating/stripping operation over 1000 h at a high depth of discharge at 62.5%. More crucially, when paired with high‐loading sulfur cathodes, D‐Cu@CuSe‐Li||S batteries harvest advanced areal capacity and stable cycling performance even under stringent working conditions of low negative‐to‐positive (N/P) (≈2) and electrolyte‐to‐sulfur (8 μL mgs−1) ratios. Overall, a fresh perspective into rationalizing current collector design is afforded, which extends Li utilization and cycling durability in the pursuit of pragmatic Li metal anodes.

Efficient Charge Transfers in Highly Conductive Copper Selenide Quantum Dot-Confined Catalysts for Robust Oxygen Evolution Reaction

“…The high-resolution TEM (HRTEM) image (Figure c) of a representative single-QD demonstrated the high crystallinity of CuSe QDs. The interplanar spacing extracted from Figure c is 0.32 nm, which perfectly matches the crystallographic (102) plane of CuSe . By matching the simulated diffraction pattern produced by JEMS software with the selected area electron diffraction (SAED) pattern (Figure d) of CuSe QD-confined catalysts, it can be deduced that the crystal structure of the CuSe QDs is a hexagonal structure with a space group of P 63/ mmc .…”

Direct-Chemical Vapor Deposition-Enabled Graphene for Emerging Energy Storage: Versatility, Essentiality, and Possibility

“…As for the prevailing metal anodes, pristine current collectors (e.g., Cu, Ni, Al) are prone to exhibit weak interaction with deposited metal. − Even worse, they can barely afford sufficient nucleation sites and homogenize electric field distributions, thereby inducing random metal deposition and severe dendritic growth. In this sense, the surface modification of current collectors is recognized as a promising way to ameliorate the electrochemical behavior of metal nucleation .…”

Recent advances of non-lithium metal anode materials for solid-state lithium-ion batteries

“…As new alloy anode materials for high energy density lithium-ion batteries, Bi and Sb can generate Li 3 Bi and Li 3 Sb in the electrode reaction process, which provides volume capacities of 3800 mA h cm À3 and 4420 mA h cm À3 , respectively, showing the same performance that is expected in solid-state lithium-ion batteries. 33 Many articles focus on the problems of lithium metal as an anode material in solid-state batteries, [34][35][36][37] and few articles systematically comment on the application of non-lithium metal anode materials in solid-state lithium-ion batteries. Here, we focus on reviewing the research progress of lithium-free anode materials in solid-state batteries.…”

“…Many articles focus on the problems of lithium metal as an anode material in solid-state batteries, 34–37 and few articles systematically comment on the application of non-lithium metal anode materials in solid-state lithium-ion batteries. Here, we focus on reviewing the research progress of lithium-free anode materials in solid-state batteries.…”