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Welcome to the Electrochemistry Laboratory (LEC)

The Electrochemistry Laboratory (LEC), established 1988, is part of the General Energy Research Department (ENE) at the Paul Scherrer Institute. The laboratory comprises two sections and 5 interacting groups that deal with almost all aspects of electrochemical energy storage and conversion.
PSI’s Electrochemistry Laboratory is Switzerland’s largest Center for Electrochemical Research.


Aus Einstein vom 21.11.2013, 21:07 Uhr
Mobilität ohne Treibhausgase
Wasserstofftankstellen für die Schweiz?

PSI Electrochemistry Symposium

32nd PSI Electrochemistry Symposium
Topic: Electrolytes
April 27, 2016
Paul Scherrer Institut, Villigen PSI
Further details will be announced in December 2015

See more about our past Symposium:
31st PSI Electrochemistry Symposium
Topic: Electrochemical Energy Storage: A Key for Future Energy Systems
May 06, 2015
Paul Scherrer Institut, Villigen PSI
more informations ..., Program, etc.


Das Kompetenzzentrum Speicherung zieht nach einem Jahr Bilanz

Media Release November 14, 2014

Ice in fuel cells imaged directly for the first time

Media Release June 16, 2014

Fuel cell know-how from the Paul Scherrer Institute at the core of the SBB minibar

Media Release April 4, 2014

The Paul Scherrer Institute runs two of the energy competence centres (SCCERs) of the Swiss government

Media Release December 12, 2013

Fuel cell membrane from the Paul Scherrer Institute better than its commercial counterparts

Media Release November 28, 2013

Zukünftige Computerchips mit "elektronischem Blutkreislauf"

Media Release November 14, 2013

Five times less platinum: fuel cells could become economically more attractive thanks to novel aerogel catalyst.

Media Release August 08, 2013

An ultrathin energy storage device made of carbon

Media Release April 26, 2013

Memory effect now also found in lithium-ion batteries

Media Release April 14, 2013

Annual Report

Annual Report 2014

View in

Scientific Highlight

June, 2013

Dosing Differential Electrochemical Mass Spectrometry (D-DEMS) for Li-O2 Batteries

The high-energy rechargeable Li-O2 battery has been subject to intensive research worldwide during the past years. The Li-O2 cell mainly comprises a negative (e.g. Li metal) and positive (e.g. porous carbon) electrode separated by an electronically insulating, but Li+ conducting electrolyte layer. In order to study the cell chemistry, a differential electrochemical mass spectrometry setup based on a set of valves, a pressure sensor and a quadrupole mass spectrometer has been developed. On galvanostatic discharge, oxygen dissolves in the non-aqueous electrolyte, reduces at the porous carbon surface to form mainly Li2O2, as determined from the linear decrease in the oxygen pressure corresponding to a ratio of 2e- per O2 consumed. On charge, the discharge product is oxidized, the lithium ions return to the negative electrode and oxygen gas evolves. Although the oxygen evolution rate initially reaches 2e-/O2, it rapidly drops as the cell over-potential increases. In addition, the evolution of CO2 at 4.3 V vs Li+/Li clearly demonstrates the existence of parasitic side reactions. The D-DEMS, as successfully developed at PSI, is a key tool for analyzing the O2 gas usage, without which conclusions on the cell rechargeability can hardly be drawn.

Presentation slides
Publication: ECL Annual Report 2012

Further publications: Lithium batteries - Phase Boundaries

Header Picture:

Flower-like electrolyte decomposition products on the surface of polypropylene Li-S battery separator.


Electrochemistry Laboratory
Paul Scherrer Institut
5232 Villigen-PSI

Prof. Dr. Th. J. Schmidt
Telephone: +41 56 310 57 65

Cordelia Gloor
Telephone: +41 56 310 29 19

LEC Events

The Electrochemistry Laboratory holds a seminar typically once a week during the semester on Wednesdays at 4.00pm in ODRA/111
Internal Seminar
Speaker: one speaker
Moderator: P. Novák/E.J. Berg
Wednesday 2 September 2015 11-12:30h
Industrialization of PEM fuel cells – challenges and barriers
Speaker: Dr. Mathias Reum, visitor, Senior Manager Research & Development, Proton Motor Fuel Cell GmbH, Puchheim, Germany
Moderator: F. Büchi
Wednesday 2 September 2015

CO2-reduction to valuable products: a differential electrochemical mass spectrometry (DEMS) study
Speaker: Yohan Paratcha
Moderator: J. Herranz
Wednesday 9 September 2015

Homepage ENE

General Energy Research Department at PSI

PSI Scientific Reports

Archive 2006-2012. The Scientific Reports – containing accounts of research topics from all the different areas – provide an impression of the variety of subjects researched at PSI.

ENE Open positions

current opening at General Energy Research Dept.