Ageing and post-mortem analyses of lithium-ion cells

Online Seminar
VA23-00673
Participation fee: 595 €

In the first part, general aspects of battery ageing are discussed, followed by the methodology of post-mortem analyses based on current literature as well as examples from everyday laboratory work. Special attention is paid to which ageing mechanism can be detected with which method. In the second part, known ageing mechanisms are discussed. Finally, possibilities are shown how the service life of lithium-ion cells can be specifically extended. The seminar contents shown are based on the speaker’s own experience as well as on current literature.

Speakers

Dr. rer. nat. Thomas Waldmann
Team leader post-mortem analyses and ageing mechanisms, Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW), Ulm

On the topic

Expensive batteries in vehicles and also in stationary applications should function as long as possible, i.e. lose as little capacity as possible. The service life of lithium-ion cells is limited by ageing mechanisms at the material level. These can be elucidated by cell openings and subsequent material characterisation (so-called post-mortem analyses).

Agenda

Online seminar, 10:00 a.m. to 6:00 p.m.

  • Definition of general terms
  • Ageing effects at cell level
  • Typical cell designs (cylindrical, pouch, prismatic)
  • Post-mortem methodology (environmental conditions, loading condition/safety, cell opening, sample handling)
  • Methods of analysis (including SEM, EDX, ICP, XRD, GD-OES, CT, …)
  • Examples of cell openings
  • Ageing mechanisms on material and electrode level (SEI growth, Li plating, local Li deposition, gas evolution, particle fractures, material dissolution, …)
  • inhomogeneous ageing effects, heating behaviour of cells
  • Characterisation of the fast charging capability
  • Relationship between safety and ageing (dendrite formation, exothermic reactions, chemical intercalation of Li in graphite)
  • Overcharging and deep discharging
  • Electrical parameters influencing ageing
  • Influence of fast charging on ageing
  • Ways to improve battery life

Objective

The seminar provides an overview of the state of the art in the ageing of lithium-ion cells. Ways to improve battery life based on operating windows are explained, insights into post-mortem analyses are given.

Circle of participants

  • Interested parties, experts and managers from industry (R&D, quality assurance) as well as
  • Scientists and young academics (doctoral candidates, post-docs, students)