LiCoO₂ Ultrathin Layer for Uniform Lithium Deposition toward a Highly Stable Lithium Metal Anode

Abstract

Electricity produced from renewable energy sources should be stored in energy storage devices efficiently due to large fluctuations in generation. The lithium metal battery is one of the most promising energy storage devices due to its high energy densities. However, continuous dendrite growth and huge volumetric changes of the lithium metal anode have hindered practical applications. Herein, we demonstrate a strategy to fabricate a dendrite-free Li metal anode by an ultrathin LiCoO 2 layered modified conductive carbon cloth (CC) substrate (CC/ LCO-UTF), where LiCoO 2 , serving as a stable lithiophilic interface, enables a uniform nucleation and dendrite-free growth of the metal Li. As a result, a stable cycling performance over 1960 h with a lower overpotential of ∼20 mV is achieved at a current density of 2 mA cm −2 , which is superior to the most recent reports. Moreover, the assembled Li||LFP and Li||S full cells with the CC/LCO-UTF@Li anode deliver a superior electrochemical performance. These findings are expected to provide a new strategy to design an advanced dendrite-free Li metal anode toward future high-performance Li metal batteries.

Sulfonate Functionalized Turbostratic Carbon Derived from Borassus flabellifer Flower: A Ultrathin Protective Layer to Mitigate the Dendrite Formation on the Metallic Lithium Anode

“…This results in the dendrites penetrating the separator causing a short circuit of the LMBs hindering its practical application in LMBs. Moreover, through Li stripping-plating activities the Li-metal anode suffers an infinite volume change particularly during the plating phase, which leads to severe internal stress and strain fluctuation. , To overcome these challenges, several strategies, such as mechanically increasing the Li surface area, nanocoating of stabilized Li-powder, Li-alloy, and Li-metal hybrid anodes, using solid electrolytes with a high Young’s modulus and introducing additives, such as SO 2 , CO2, alkali-metal ions, vinylene carbonate (VC), and fluoroethylene carbonate (FEC), into the electrolytes has been demonstrated. − Among them, the SO 2 and CO 2 additives are effective at modifying the nature of the solid electrolyte interface (SEI) film that reacts primarily with the Li-metal, thereby enabling the formation of an SEI that prevents further electrolyte degradation on the Li surface. − …”

Silver Copper Oxide Nanowires by Electrodeposition for Stable Lithium Metal Anode in Carbonate-Based Electrolytes

“…The capacity of LIBs is limited by the amount of Li ions (Li + ) that can be removed from the cathode, which greatly restricts its energy density. Li metal has an ultrahigh theoretical specific capacity (3860 mAh g –1 ) and the lowest electrochemical potential (−3.040 V compared with a standard hydrogen electrode). , Furthermore, Li metal anodes could match some high capacity lithium-free cathodes such as sulfur and oxygen to have a chance to develop much higher energy density batteries systems . As a result, Li metal batteries (LMBs) using Li metal anodes have increasingly been extensively studied by researchers. , …”