A refined SEI model for lithium-ion batteries
This poster talks about adding a new sub-model, solvent consumption, into the physic-based battery life model with SEI layer growth. Solvent consumption is one important side effect of SEI layer growth, has been almost completely overlooked in models. Without solvent consumption, battery models are unable to capture lots of important phenomena such as electrolyte dry-out […]
Proposed standardisation of life-cycle assessment of stationary energy storage systems
The life-cycle assessment (LCA) of various stationary energy storage systems (SESS) is not yet well studied. There is an overall lack of coherency as different LCA studies show different system scopes, data, model structures and assumptions that are used. This can lead to discrepancies in the interpretation of the results when comparing them, and emphasise […]
Analysis of the heat capacity for large area Lithium-Ion pouch cells
Besides the electrical properties, thermal effects are crucial when modeling a lithium-ion battery. Especially investigation of large-format cells is scarce because of the required systems. This poster compares two approaches to measure the specific heat capacity of 46Ah pouch cells, using only standard laboratory equipment. The first method utilizes an aluminum reference workpiece with known […]
Model analysis of silicon-based electrodes for lithium ion batteries
Silicon is one of the most promising anode materials to be used in the next generation high energy density lithium-ion batteries due to its large storage capacity, abundant material content and environmental benignity. Although theoretical capacity of pure silicon can be over 10 times as high as that of graphite, the highly increased Li storage […]
Optimized calibration of P2D lithium ion battery physical model following sensitivity-based multi-measurement protocol
This poster deals with the activities ongoing at Politecnico di Milano in the framework of the European Project DigiPrime, on lithium-ion batteries diagnostics and estimation of residual capabilities at end-of-life. It presents the development of a fast multi-measurement protocol that can ease the calibration of the pseudo-two-dimensional model (P2D) with a thermal model, to enable […]
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 […]
Investigating changes in kinetics and transport over NCA/Gr-SiOx battery lifetime
There is a great need for non-invasive methods to unravel the underlying causes of battery ageing. From the perspective of electrochemical models, battery ageing affects a number of parameters, but conventional parametrization of electrodes is no longer possible. This is because the re-parametrisation would require the fabrication of an aged half-cell. Although ageing models can […]
Application of in-situ dilatometry to investigate the effect of single-walled carbon nanotubes on the performance of Ni-rich cathodes
Production of high-power lithium-ion batteries (LiBs) is considered to be crucial for world-wide use of electric vehicles. There have been many attempts to increase power density of LiBs by addition of highly conductive materials such as carbon nano tubes (CNTs) to the anode and the cathode. In this research, we investigated the electrochemical performance of […]
A novel approach to state/parameter estimation and optimal fast-charging
This work investigates a novel approach to joint state-parameter estimation and prediction of the optimal fast-charging current. The approach is based on a global optimisation technique, recently developed in the mathematical field of measure-moment theory. This global (rather than discretised) approach to optimisation offers convergence guarantees even when tackling nonlinear problems with non-convex constraints, which […]
A novel approach to state/parameter estimation and optimal fast-charging
This work investigates a novel approach to joint state-parameter estimation and prediction of the optimal fast-charging current. The approach is based on a global optimisation technique, recently developed in the mathematical field of measure-moment theory. This global (rather than discretised) approach to optimisation offers convergence guarantees even when tackling nonlinear problems with non-convex constraints, which […]