Optimization of Silicon-Graphite Anode and Chitosan Binder Material for Lithium-ion Batteries
One of the promising approaches towards designing high energy density lithium-ion batteries (LIBs) involves the use of high-capacity anode materials. A blend of silicon (Si), with a high lithiation capacity of 3590 mAh/g (Li3.75Si) at room temperature , and graphite (Gr), endowed with limited volume change during the charge/discharge process and superior electric conductivity, presents […]
Electrochemically Controlled Pre-lithiation of Si-containing Anodes for Enhancing the Cycling Performance
In order to meet the increased demands for energy storage that has a higher capacity and energy density, silicon has been proved as one of the most promising candidates to replace current graphite as an active material of the anode. Despite its higher theoretical capacity and abundant deposits, it has not been widely used for […]
Dual anion mediated lithium interface and ion conducting pathway for solvent-free cross-linked polymer electrolytes
Due to increase in demand for the batteries with high energy density and flexibility, replacement of conventional carbonate-based liquid electrolytes to solvent-free solid polymer electrolytes (SPEs) is an effective strategy towards safe lithium metal batteries1. Developments in the field of SPEs were mainly focused on improving the intrinsic low ionic conductivity, narrow electrochemical stability window […]
Impact of Li-Ion slurry formulation on cathode defects caused by calendering process
In the current work, the influence of the cathode formulation on the physical and mechanical properties after calendering and slitting was studied. A mixture design method was exploited to evaluate the impact of different components in the final electrode. Mixture design is a statistical analysis based method, which allow one to gain quite extensive information […]
Silicon nanoparticles with a graphene shell as anodes for Lithium Ion Batteries: study of the role of graphene to silicon ratio
Silicon is a promising material in lithium-ion battery technology. As a negative electrode, it exhibits more than 3800 mAh/g of theoretical specific capacity which is way higher compared to the 370 mAh/g of graphite’s theoretical specific capacity. Furthermore, silicon is the second richest material in the earth’s crust, it is non-toxic and environmentally friendly. However, […]
Electrical contacting of current collector foils for lithium-ion batteries using conductive adhesives
The production of lithium-ion batteries requires several different joining techniques to contact the individual cells. In addition to mechanical strength, low contact resistance between the contact points, durability and safety are crucial. Focusing the mostly used pouch cells, at cell level individual foils need to be conductively joined. Resistance spot, ultrasonic or laser beam welding […]
Influence of Binders on the Structure and Performance of Anodes in Lithium-Ion Batteries
Binders and their behaviour as inactive components in anode suspensions, electrodes and their electrochemical performance are still unpredictable, requiring detailed characterization along the process chain (from material to cell performance). In this study two different thickening binders were used: Carboxymethylcellulose (CMC) and Alginate (ALG). While CMC varies in molar mass, ALG varies in M/G ratio […]
Development of a scalable synthesis route of sulfide solid electrolytes
All-solid-state batteries (ASSB) are recently considered as further development of conventional lithium-ion batteries due to their potentially superior properties [1,2]. In order to produce cells with competitive characteristics, such as high energy density as well as high thermal and mechanical stability, the choice of materials at the beginning of the value-added chain is a main […]
Conductive and inductive drying processes for Li-ion electrode production towards higher throughput
Aiming an efficient lithium-ion battery production all process steps have to be enhanced in terms of quality and performance. In this regard, the drying process of electrodes holds great potential for improvement. The main challenge of state-of-the-art convective drying methods is the negative impact of high drying rates on electrode properties for example, a destruction […]
FEM based modelling of lamellar LiFePO4 electrodes
Porous electrodes in lithium-ion batteries increase the active area and thus can be used to achieve higher power densities and more uniform current distributions. The freeze-casting (ice- templating) method enables the fabrication of high porous lamellar structured lithium-iron(III)- phosphate cathodes. The variation of temperature and supersaturation leads to different morphologies in pore shapes by ice-templating […]