Plasma Enhanced Lithium Coupled with Cobalt Fibers Arrays for Advanced Energy Storage

Abstract

Construction of high efficiency and stableLi metal anodes is extremely vital to the breakthrough of Li metal batteries. In this study, for the first time, groundbreaking in situ plasma interphase engineering is reported to construct high-quality lithium halides-dominated solid electrolyte interphase layer on Li metal to stabilize & protect the anode. Typically, SF 6 plasma-induced sulfured and fluorinated interphase (SFI) is composed of LiF and Li 2 S, interwoven with each other to form a consecutive solid electrolyte interphase. Simultaneously, brand-new vertical Co fibers (diameter: ≈5 µm) scaffold is designed via a facile magnetic-field-assisted hydrothermal method to collaborate with plasma-enhanced Li metal anodes (SFI@Li/Co). The Co fibers scaffold accommodates active Li with mechanical integrity and decreases local current density with good lithiophilicity and low geometric tortuosity, supported by DFT calculations and COMSOL Multiphysics simulation. Consequently, the assembled symmetric cells with SFI@Li/Co anodes exhibit superior stability over 525 h with a small voltage hysteresis (125 mV at 5 mA cm −2 ) and improved Coulombic efficiency (99.7%), much better than the counterparts. Enhanced electrochemical performance is also demonstrated in full cells with commercial cathodes and SFI@Li/Co anode. The research offers a new route to develop advanced alkali metal anodes for energy storage.

Juice Vesicles Bioreactors Technology for Constructing Advanced Carbon‐Based Energy Storage

“…To further confirm the functionality of carbon nanoflakes composed of numerous carbon nanospheres and Ni/NiCo nanoparticles, we conducted COMSOL Multiphysics simulations for simulating secondary current distributions in Figure 2l. [ 40 ] As observed, unlike the uncontrollable current density of smooth carbon nanoflakes, the high current densities of PCC, PCC/Ni, and PCC/NiCo are mainly concentrated on the bottom of the carbon nanoparticles, indicating that solid‐state polysulfides would preferentially deposit and converse on the grooves between the carbon nanoparticles. Moreover, the current density distributions of PCC/Ni and PCC/NiCo are more homogeneous with the in situ implantation of Ni/NiCo nanoparticles and increase of carbon nanoparticles, promoting the consistent deposition of polysulfides and bolstering cycling stability.…”

Plasma Technology for Advanced Electrochemical Energy Storage

“…After ionization, CF 4 formed a large number of highly active F* and C 2 species, which could quickly react with the lithium anode to form a thin & uniform artificial SEI layer composed of LiF and Li 2 C 2 , thus promoting the uniform deposition of Li + . The experimental results and theoretical calculations showed that the LiF with high interfacial energy and mechanical strength coupled with the Li 2 C 2 composite SEI with low Li + diffusion barrier could cooperatively achieve rapid/ stable deposition and stripping of Li + with a cycle life of up to 6500 h. Recently, our research group has proposed a plasma-assisted approach for constructing an artificial solid electrolyte interphase in conjunction with a three-dimensional fluid collector design to synergistically suppress the growth of lithium dendrites.. [64] The production process diagram of Co nanoarray support Li metal anode with LiF and Li 2 S interphase (SFI@Li/Co) is shown in Figure 5g. We used a conductive .…”

Development of plasma technology for the preparation and modification of energy storage materials

“…Zhong Qiu et al 80 employed a synergistic approach of plasma interfacial engineering and 3D vertical co-fiber scaffolds to optimize the lithium metal anode. This strategy involved immersing a 3D co-fiber scaffold into molten lithium, followed by plasma treatment using SF 6 plasma to modify the Li/Co anode, thereby constructing a mutually interlaced SEI layer comprising LiF and Li 2 S on the lithium metal, known as the sulfur fluoride interfacial layer (SFI).…”