Highly Concentrated Electrolytes: Cell Optimisation and Fundamentals

Research Project, 2014 – 2018

The ability of fast-charging the battery is a very crucial step towards a wider implementation of hybrid and/or electric vehicles. The limitations at a pack level are based on the electricity and heat distribution, but more fundamental is the ease of intercalation of Li-ions into the electrodes from the electrolytes. During 2013 several groups reported that by use of highly salt concentrated electrolytes in traditional batteries this enabled e.g. fast-charging with much more reasonably maintained capacity. In addition, other solvents than the traditional can be used. However, there is today no proper rationale for these features, apart from that the solid electrolytes interphase (SEI) must change character – as this is what litmits Li-ion transport and availability. The presented project is a joint PhD student project, shared between Uppsala and Chalmers, with focus both on the fundamentals and cell optimization by studies of both the new electrolytes and the SEI's created.

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Related Areas of Advance and Infrastructure

Sustainable development

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Publications

Electrochemical Behaviour of Nb-Doped Anatase TiO2 Microbeads in an Ionic Liquid Electrolyte

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