Highly Efficient Organosulfur and Lithium‐Metal Hosts Enabled by C@Fe₃N Sponge

Abstract

Lithium-organosulfur (Li-OS) batteries, despite possessing high theoretical specific capacity, encounter a few practical challenges, including unsatisfactory lifespan and low active material utilization under realistic conditions. Here, diisoropyl xanthogen polysulfide (DIXPS) has been selected as a model organosulfur compound to investigate the practical feasibility of Li-OS batteries under realistic conditions. A welldesigned freestanding carbon sponge decorated with Fe 3 N nanoparticles (C@Fe 3 N) is introduced into the Li-OS cells as a scaffold for both Li and DIXPS. The lithiophilic property of the C@Fe 3 N host guides uniform lithium deposition at the anode, and the catalysis of the DIXPS conversion reaction promotes the kinetics at the cathode. Impressively, the synergistic effect of C@Fe 3 N leads to an extremely stable cycling performance over 1 000 cycles in a Li-OS full cell under realistic conditions.

Lithium Tritelluride as an Electrolyte Additive for Stabilizing Lithium Deposition and Enhancing Sulfur Utilization in Anode‐Free Lithium–Sulfur Batteries

“…[6][7][8][9][10][11][12] Li anode engineering and protection strategies, like artificial SEI, have also demonstrated their ability to stabilize Li deposition in Li-S batteries. [13][14][15][16][17][18][19][20] However, these techniques generally require sophisticated synthesis processes. Recently, a new approach was introduced by our group to dramatically improve the cyclability of Li-metal anode by constructing a ternary sulfide-rich SEI layer (Li a X b S c ).…”

Surface-Engineered Cotton Fabric-Derived Functional Carbon Cloth and Its Application in Advanced Lithium–Sulfur Full Cells

“…The performance of the half-cell LSB is significantly enhanced by the uniform nanolayer, however, certain parameters such as sulfur loading, E / S ratio, and the thickness of lithium anode are required to be systematically optimized in order to attain a balance of capacity and energy density from the sulfur-based system. − In a further study, to eliminate the use of a lithium metal anode, lithium metal was electrodeposited onto copper foil galvanostatically at a current density of 1 mA cm –2 . Figure a,b depicts a schematic comparing the typical LSB geometry, which employs an excess of lithium with the lithium electrodeposited copper foil anode.…”

Toward thin and stable anodes for practical lithium metal batteries: A review, strategies, and perspectives

“…Various research teams have addressed this by incorporating lithiophilic materials on the surface of host matrix to facilitate Li plating, enabling stable reduction and adherence of Li to the host. For instance, He et al 50 utilized a freestanding carbon sponge (C@Fe 3 N) with Fe 3 N nanoparticles as the Li host matrix. The surface‐attached nitride nanoparticles provided sites for stable Li attachment and promoted uniform Li plating within the structure.…”