Self‐Regulation Seaweed‐Like Lithium Metal Anode Enables Stable Cycle Life of Lithium Battery

Abstract

Lithium (Li) metal anodes exhibit intriguing advantages for application in high‐energy‐density batteries. However, the short cycle life and security issues of these anodes induced by the dendrite growth and huge volumetric change of Li severely limit their practical application. Herein, a heuristic method to fabricate a self–supported seaweed‐like Li metal anode directly to improve the cycle life of Li metal batteries, is reported. The unique seaweed‐like morphology of the Li anode facilitates the dispersion of the local current density, impeding the uneven growth of Li dendrites, and remits the volume expansion of the anode, leading to excellent cycle performance. The as‐prepared Li metal anode exhibits excellent plating–stripping stability over 600 cycles at high current density of 2 mA cm−2 and delivers excellent stability even with the Li4Ti5O12 cathode in the full cell. This study provides a facile strategy to prepare stable and dendrite‐free Li anodes by controlling the morphology of Li metal. Thus, this study can further inspire new research ideas for preparing stable Li metal anodes.

Confronting the Challenges in Lithium Anodes for Lithium Metal Batteries

“…Considering that introducing inactive host material reduces the energy density of the battery, direct synthesis of lithium metal with 3D morphology is effective to avoid this disadvantage. Wang et al [143] prepared thiophdiyne (TD) membranes on copper foil, in which the thiophene groups were lithiophilic. By adjusting the distribution of Li + during the battery's operation, seaweed-like lithium was eventually formed on the lithiophilic copper foil decorated by TD (TD-SW-Li).…”

“…Wang et al. [ 143 ] prepared thiophdiyne (TD) membranes on copper foil, in which the thiophene groups were lithiophilic. By adjusting the distribution of Li + during the battery's operation, seaweed‐like lithium was eventually formed on the lithiophilic copper foil decorated by TD (TD‐SW‐Li).…”

Constructing Biomass‐Based Ultrahigh‐Rate Performance SnOy@C/SiOx Anode for LIBs via Disproportionation Effect

“…[2,3] However, owing to their huge volume change, large voltage delay, lower initial Coulombic efficiency, and poor electronic conductivity, there are still bottlenecks for industrialization. [4][5][6][7] Numerous studies devoted to tackling these issues, such as designing nano-Si or nano-SnO 2 materials, [8,9] enclosing nano-Si or nano-SnO 2 into a MOF skeleton or graphite-like C matrix, [10][11][12] and doping heteroatom into the composite of C/SiO x or C/SnO x . [13,14] It is worth noting that these reported strategies mainly used chemical methods to prepare Si or SnO 2 /C composites, and perhaps making full use of material's intrinsic properties are more conducive to its advantages.…”

“…[ 2,3 ] However, owing to their huge volume change, large voltage delay, lower initial Coulombic efficiency, and poor electronic conductivity, there are still bottlenecks for industrialization. [ 4–7 ]…”

From 0D to 3D: Dimensional Control of Bismuth for Potassium Storage with Superb Kinetics and Cycling Stability

“…In the last three decades, lithium-ion batteries (LIBs) have achieved tremendous development and even changed people's lifestyles. [1][2][3][4][5][6] However, the limited lithium resources and uneven global distribution hinder its application in large-scale short ion diffusion length along the radial direction and fast electron transport along the 1D direction. Jiao et al prepared 1D Bi within a N, S co-doped carbon matrix as conductive framework and buffer layer, showing high rate capability (289 mA h g −1 at 6 A g −1 ).…”