Batteries & Supercaps最新文献

Process parameters, often overlooked in lab-scale studies, play a crucial role in shaping manufacturing–performance correlations when scaling up battery cell components. The Research Article by I. Hasa and co-workers (DOI: 10.1002/batt.202400645) examines the influence of conductive additives and electrode manufacturing parameters, bridging the gap between academic research and industrial applications for a more accurate assessment of electrode performance under realistic conditions.

The Front Cover illustrates the impact of polyethylene separator porosity on the electrochemical performance of lithium-ion batteries. The findings demonstrate that intrinsic separator properties, such as resistance and porosity, play a critical role in determining power performance, particularly in cells with thick electrodes. This study highlights the necessity of optimizing separator characteristics to align with specific electrode designs. More information can be found in the Research Article by H. Lee, Y. M. Lee and co-workers (DOI: 10.1002/batt.202400638).

The Cover Feature shows how recessed microelectrodes were employed as a versatile binder-free platform to investigate the electrochemical performance of Prussian Blue analogues (PBA), a class of promising battery materials, concerning capacity in varying aqueous electrolytes. To corroborate the micro-electrochemical findings, both ex-situ and operando chemical characterizations were conducted, offering complementary insights into the structural and chemical evolution of the PBA material during electrochemical cycling. More information can be found in the Research Article by W. Schuhmann and co-workers (DOI: 10.1002/batt.202400743).

The Front Cover highlights a study that explored how carbon electrode modifications and bismuth deposition affect performance in KCrPDTA/K₄Fe(CN)₆ flow batteries. Larger bismuth deposits that form on thermally activated electrodes reduce the Coulombic efficiency due to enhanced hydrogen evolution, whereas smaller deposits improve the overall efficiency. These findings highlight the importance of controlling catalyst morphology to balance power output and cell longevity. More information can be found in the Research Article by D. Reber and co-workers (DOI: 10.1002/batt.202400696).

The Front Cover illustrates the five key electrolytes discussed in this Review of green aqueous ion batteries by Y.-E. Sung, S.-H. Yu and co-workers (DOI: 10.1002/batt.202400579). At the center of the illustration is a cylindrical aqueous battery, symbolizing the paper's two major themes: high-energy and low-temperature operation. It is placed in the middle of a green forest, surrounded by hydrogel, eutectic, additive/cosolvent, water-in-salt, and molecular crowding electrolytes.

The Cover Feature showcases the manufacturing journey of solid-state battery composite electrodes, capturing the transition of the microstructure across key stages: slurry, drying, and calendering. It features a modeling workflow for battery cathodes composed of LiNi_0.8Mn_0.1Co_0.1O₂ and Li₆PS₅Cl, unveiling the impact of processing on microstructural evolution, with results validated against experimental data. More information can be found in the Research Article by A. A. Franco and co-workers (DOI: 10.1002/batt.202400709).

The Cover Feature represents the whole ARTISTIC project workflow to optimize battery manufacturing process parameters. Synthetic data (produced by the physics-based manufacturing modeling chain) and experimental data are used to train surrogate models by using different machine learning techniques at the different manufacturing stages: mixing & slurry, coating & drying, calendering, electrolyte filling and performance. Then, optimizers, such as Bayesian, are used to determine the best input parameters to optimize output battery properties. More information can be found in the Concept by A. A. Franco and co-workers (DOI: 10.1002/batt.202400385).

The Cover Feature represents the application of MXene-based ternary hybrids to supercapacitors due to their better physicochemical properties, including high conductivity, expansive surface area, and abundant redox-active sites. The 3D ternary hybrid structure was engineered by combining metallic VSe₂, Ti₃C₂Tx MXene, and carbon nanotubes to overcome the limitations typically encountered with 2D-material-based electrodes in supercapacitor applications. More information can be found in the Research Article by S. M. Jeong, C. S. Rout and co-workers (DOI: 10.1002/batt.202400466).

The Front Cover illustrates the impact of chloride ions on magnesium deposition/dissolution on copper electrodes by using a semi-solid electrolyte based on a metal–organic framework. Chloride ions enhance magnesium dissolution, dissolving the copper surface and forming active sites for magnesium deposition. Galvanostatic cycling induces pitting corrosion and nanoparticle formation. More information can be found in the Research Article by H. K. Hassan, T. Jacob and co-workers (DOI: 10.1002/batt.202400420).

Sodium-ion batteries offer a promising alternative to lithium-ion batteries by addressing ecological and economic challenges. However, to assess the applicability of these cells for different sectors, understanding aging behavior, including degradation modes, is crucial. This work presents a comprehensive aging analysis of 67 commercial sodium-ion batteries under various temperatures, C-rates, and depths of discharge. We analyzed the initial cell-to-cell variance and the aging trajectories regarding capacity fade and resistance increase. We demonstrated that the cycling rate does not significantly influence the aging trajectories, whereas smaller depths of discharge significantly reduce degradation. The degradation gradients for 25 °C and 40 °C were similar; for −10 °C, we observed rapid capacity fading that can be attributed to irreversible sodium plating. Furthermore, we identified the degradation modes for four different aging categories. Since some aging tests stopped due to gas-induced current interrupt device triggering at low current rates and states of charge, we proposed two hypotheses for the gassing under specific conditions, suggesting inadequate gas consumption in cathode-electrolyte side reactions or solid electrolyte interphase instability as potential causes. Overall, this work provides a valuable in-depth analysis of the aging behavior of a commercial sodium-ion battery as a function of temperature, C-rate, and depth of discharge, with data made available for further research.