The use of electrolyte additives is one the most effective and economical ways to improve battery performance by stabilizing electrode/electrolyte interface. In this work, we identified that fluoroethylene carbonate (FEC), which important additives, had different impacts on anode cathode, investigating a graphite LiMn2O4 cathode through electrochemical analyses at room elevated temperatures. side, solid interphase (SEI) layer derived from FEC exhibited lower interfacial resistance excellent...

With the rapid growth of volume spent Li-ion batteries (LIBs), recycling LIBs has attracted significant attention in recent years for future sustainability. In particular, there remains a great need development scalable and environment-friendly separation process to recycle valuable cathode active materials from electrode scraps. this work, froth flotation technique was adopted separate mixture anode materials. To evaluate whether recovered maintain their functional integrity after developed...

Pulsed laser exfoliation was successfully applied to fabricate few-layer phosphorene from high energy mechanical milling (HEMM) synthesized black phosphorus (BP) powders and crystals. The results show that the polycrystalline laser-exfoliated HEMM-synthesized BP is highly stable in ambient environments, providing proof-of-concept for low-cost fabrication of large-scale applications.

Retrieving cathode active materials from Li-ion battery electrode scraps is a crucial step in direct recycling; however, it presents challenges due to the strong bonds between material, carbon black, and binder. In this work, we propose use of propylene carbonate (PC) as green solvent for solvent-based liberation/separation process. Compared other solvents, PC offers advantage efficiently liberating at relatively low temperature within short time. The reclaimed obtained through PC-based...

We show a top-down synthesis approach to mass-produce phosphorene–graphene nanosheet composites with superior cycle stability and rate capability. Currently, using exfoliation achieve two-dimensional (2D) materials is primarily limited pure crystals. discover that high-quality nanoscale 2D composite sheets can be directly exfoliated from extremely low-cost bulk three-dimensional (3D) black phosphorus–graphite synthesized by mechanical milling while maintaining the chemical bonding intimate...

Reusing valuable cathode materials from end-of-life (EOL) Li-ion batteries can help decrease dependence on mining of raw for producing cathodes, while preventing commodity prices rising. This study employed chemically delithiated cathodes that are analogous to spent but free impurities fundamentally elucidate the effectiveness regeneration. Two lithium cobalt oxides (LCOs) at different degrees delithiation were synthesized via chemical delithiation. Their material and electrochemical...

To investigate the lithium transport mechanism in micrometer-sized germanium (Ge) particles, situ focused ion beam-scanning electron microscopy was used to monitor structural evolution of individual Ge particles during lithiation. Our results show that there are two types reaction fronts lithiation, representing differences reactions on surface and bulk. The cross-sectional SEM images transmission characterizations interface between amorphous LixGe has a wedge shape because higher Li rate...

Black phosphorus (BP) is a high capacity anode material and has been synthesized with different carbon materials to mitigate volume changes during lithiation/delithiation. There large discrepancy in cycle stability of phosphorus-carbon the literature, factors affecting performance are not well elucidated. In this study, electrochemical black phosphorus-graphite (BP-G) composite regards (1) composition, (2) electrolyte additive, (3) ballmilling synthesis conditions, (4) electrode loading...

The widespread adoption of lithium-ion batteries (LIBs) in various applications has led to an increasing demand for efficient and environmentally sustainable recycling processes. This necessity stems from the broader goal establishing a circular economy LIBs while simultaneously addressing challenges within supply chain. One primary LIB lies retrieval valuable materials end-of-life or electrode scraps benign manner. In particular, reclaiming high purity cathode active is critical step...

The increasing demand for Li-ion batteries (LIBs) in hybrid and electric vehicles had led to a significant increase the volume of new end-of-life LIBs. For this reason, recycling spent LIBs has attracted attention recent years future sustainability. Different from existing methods such as pyrometallurgical hydrometallurgical methods, direct method recovers cathode anode active materials directly reusable forms at low cost. This process consists two steps: 1) liberation separation, 2)...

Fluoroethylene carbonate (FEC) has been commonly used as an electrolyte additive to improve the stability of solid interphase (SEI) at silicon and graphite-based anodes. Although impact FEC is well known, there still lack understanding how influence on interfacial chemistry mechanics anode/electrolyte interface. In addition, relatively little attention paid effects cathode side. this work, we symmetrically investigated graphite/electrolyte LiMn 2 O 4 /electrolyte interfaces room elevated...

The mechanical instability of the Solid Electrolyte Interphase (SEI) layer in lithium ion (Li-ion) batteries causes significant side reactions resulting Li-ion consumption and cell impedance rise by forming further SEI layers, which eventually leads to battery capacity fade power fade. In this work, elasticity was studied both experimentally computationally. To characterize elasticity, formed on a HOPG electrode LiPF 6 / EC+DMC electrolyte has been investigated using PF-QNM atomistic...

Understanding the degradation mechanisms of a Li-ion battery is considerable importance for achieving longer lifetime. In battery, process involves several physical, mechanical, and chemical processes that are interdependent. The complexity these makes it difficult to improve performance over time, especially at elevated temperatures. Among various other reasons, dissolution active materials cathode resultant presence transition metal ions in vicinity anode/SEI two key phenomena responsible...

The electrochemical and stress responses of lithium-ion batteries (LIBs) are highly dependent on the three-dimensional (3D) microstructure electrodes, substantial fundamental research is required to optimize electrode design for high-energy, high-power LIBs with fast charging capabilities. Herein, we report a multi-scale LIB model that enables examination full-cell battery performance while investigating detailed cathode using variational enrichment method. With high computational efficiency...

The volume of end-of-life lithium-ion batteries (LIBs) is expected to increase rapidly over the coming decade. Consequently, it great interest recycle and reuse cathode materials due their high value in LIBs. Direct recycling, which aims regenerate without destroying original functional structures, could potentially maximize return from LIBs compared pyrometallurgical- hydrometallurgical-based recycling processes. Here, we fundamentally investigate effectiveness regeneration by regenerating...