Titration methods for the determination of hydroxides and carbonates in lithium metal oxide cathode materials
With lithium-ion batteries (LIBs) being one of the most important energy storage technologies today, there is also an increasing need for LIB production to become more sustainable.1 For the anode, aqueous processing has already been realised, eliminating the use of harmful N-methyl-2-pyrrolidone (NMP) during electrode fabrication.2 Unfortunately, the main obstacle to the implementation of aqueous […]
Multi-Chemistry Parameter Sensitivity Analysis of Electrochemical Battery Models
Lithium-ion batteries have become a key element for the decarbonization of the energy and transportation sectors due to their continuously increasing energy and power density as well as decreasing manufacturing and operating costs. Battery models that precisely represent the cell internal states provide the foundation for intelligent control algorithms that accelerate the charging process and, […]
Aging assessment at cell level of battery packs with forced air cooling and immersed cooling system
In the related work (P3-008) by Marongiu et al, two identical battery packs were cycled until End-of-Life condition using different thermal management strategies, namely air cooling and immersed cooling. While the mentioned work examines the degradation on pack level, this work focuses on analyzing single cell degradation state after packs’ disassembly. The goal is to […]
Uncontaminated Preformed SEI on Lithium Metal Electrodes: Impact of Functional Additives
Even though lithium metal has long been regarded as a promising active material for future lithium metal batteries (LMB), the native passivation layers covering pristine lithium metal (pLi) and its possible influence on the evaluation of the solid electrolyte interphase (SEI) has largely been disregarded by the battery research community. The systematic study presented here […]
Silicon@Graphite/Carbon composite anodes: Influence of various pitch derived carbon coatings, Si sizes and concentrations on performance
In the present study the influence of various compositional parameters for a core-shell structured nano-silicon graphite composite (Si@Gr/C) was studied. At first, the stability of the composite particles was evaluated at different silicon contents. It could be observed that an increase in a higher amount of silicon led to reduced composite stability and a detachment […]
Establishment of an extrusion process for the scalable production of sulfide-based SSBs
The focus of this work lies on the establishment of scalable solvent-based processing routes to produce sulfide solid-state cathodes and separators. Sulfide-based solid-state batteries are predicted to have several advantages compared to conventional lithium ion batteries, e.g. in the aspects of energy density, electrochemical stability and safety. These are faced with challenges regarding the formation […]
Decomposition Behavior of LLZTO/NCM Composite Cathodes in Air vs. Argon Atmosphere During Sintering
LLZTO (Li6.6La3Zr1.6Ta0.4O12) is a promising oxide solid electrolyte for solid state batteries, exhibiting a high chemical stability against Li metal. At the same time, it offers a wide electrochemical window and high ionic conductivity reaching close to 10-3 S cm-1 at room temperature. As a cathode active material-, NCM (e.g. Li1Ni0.33Co0.33Mn0.33O2) is widely used and […]
Comparison of active and passive fillers for the enhancement of the ionic conductivity of polymer-based electrolytes for solid-state batteries
All-solid-state batteries (ASSBs) based on solid polymer electrolytes are among the most promising candidates for next-generation batteries because of their improved safety and energy storage performance. However, the low ionic conductivity of polymer electrolytes at ambient temperature is their main limitation. Hybrid solid electrolytes (HSE) constituted of an organic polymer matrix and an inorganic filler […]
Challenges of Synthesizing Ni-rich ‘Single Crystal’ Layered Oxide Cathodes for Lithium Ion Batteries
Secondary particle cracking has been identified as a major failure mechanism in Ni rich NCMs (Li[NixCoyMnz]O2 with x ≥ 0.8; x+y+z=1) layered oxides as it allows surface-related degradation phenomena such as ongoing electrolyte decomposition on newly formed, highly reactive surface cycle after cycle. As opposed to their polycrystalline (PC) counterparts, ‘Single-crystal’ (SC) NCMs are comprised […]
Challenges of Synthesizing Ni-rich ‘Single Crystal’ Layered Oxide Cathodes for Lithium Ion Batteries
Secondary particle cracking has been identified as a major failure mechanism in Ni rich NCMs (Li[NixCoyMnz]O2 with x ≥ 0.8; x+y+z=1) layered oxides as it allows surface-related degradation phenomena such as ongoing electrolyte decomposition on newly formed, highly reactive surface cycle after cycle. As opposed to their polycrystalline (PC) counterparts, ‘Single-crystal’ (SC) NCMs are comprised […]