Harry Michael

Position

PhD Researcher

About

Harry’s hard to miss with his beautiful head full of luxurious curls. But on the off-chance, you do miss him, he’s the one with the big smile on his face.

He’s been to India and loved the Golden Triangle but forever immortalised in his heart is the Year 6 trip he took to the Isle of Wight. When he’s not stay-cationing in super exotic places (like Croydon) or eating lots of peas (or a Tesco salad), he’s PhDing. Originally a chemist, he is now allll about that battery degradation life, he can tell you all there is to know about the height of electrodes as they’re being cycled (dilatometry).

Fun fact: He has a secret Greek name he doesn’t like people to know (it’s Chara******!)

Research

Title: 3D and 4D Characterisation of dilated lithium-ion battery electrode microstructure using in-situ dilatometry and X-ray tomography
Harry’s research is focused on the degradation of lithium-ion batteries (LiBs) and is affiliated with the Faraday Institution.  Using in-situ dilatometry to investigate the dilation of elected LiB anode materials such as graphite and silicon during operation (e.g. standard lithiation cycling) and collating the findings with various experimental techniques that can explain the dilation observed. There is quite substantial dilation during the operation of a LiB electrode that can limit the performance and lifetime of the device. A number of factors contribute to the changes in electrode volume such as initial particle size, distribution, operating temperature, active material content, elected binder, load profile and cycling conditions.
Through a variety of electrochemical and imaging techniques, encompassing tomography driven 3D reconstructions of internal morphologies, the aim is to better understand the mechanisms driving the volume expansion of LiB electrodes with a view to inhibiting this degradation pathway and possibility predicting its impact on electrochemical performance loss of LiBs.

Contact: harry.michael.18@ucl.ac.uk