Battery frames; battery holders; battery housing covers; separation systems and elements being parts of electrochemical cells, including redox flow batteries and electrolyzers, for separating chemical energy carriers; battery cell frames; battery cells; battery separators; membranes for ion exchange in redox flow batteries; * semi-permeable * electrolysis membranes * for scientific or laboratory use * being parts of electrochemical cells, including redox flow batteries and electrolyzers; * semi-permeable * electrolysis membranes being part of ion exchange devices for scientific or laboratory use; * semi-permeable * hydrogen electrolysis membranes being part of electrochemical cells, including redox flow batteries and electrolyzers * for scientific or laboratory use; semi-permeable * hydrogen electrolysis membranes being part of ion exchange devices for scientific or laboratory use; * semi-permeable * membranes being part of electrochemical cells, including redox flow batteries and electrolyzers; ion exchange devices for scientific or laboratory use; * semi-permeable * membranes being parts of ion exchange devices for scientific or laboratory use; * semi-permeable * polymer membranes being parts of electrochemical cells, including redox flow batteries and electrolyzers * for scientific or laboratory use *; * semi-permeable * polymer membranes being art of ion exchange devices for scientific or laboratory use; * semi-permeable * flat membranes being part of electrochemical cells, including redox flow batteries and electrolyzers * for scientific or laboratory use *; *semi-permeable * flat membranes being part of ion exchange devices for scientific or laboratory use; * semi-permeable * membrane modules being part of electrochemical cells, including redox flow batteries and electrolyzers * for scientific or laboratory use; semi-permeable * membrane modules being part of ion exchange devices for scientific or laboratory use; membranes, polymer membranes, flat membranes, membrane modules, ion exchange membranes, electrolysis membranes, hydrogen electrolysis membranes * , all semi-permeable * being parts of electrochemical cells and redox flow batteries for the separation of electrolytes and organic electrolytes * for scientific or laboratory use *; Ionization apparatus for the treatment of water or air, namely, ion exchange devices; Ionization apparatus for the treatment of water or air, namely ion exchange installations; Membranes for water or air filtering apparatus, namely, membranes, polymer membranes, flat membranes, membrane modules, ion exchange membranes, electrolysis membranes; Membranes for reverse osmosis units, namely, hydrogen electrolysis membranes being parts of apparatus for reverse osmosis; Membranes for the treatment of water or air, namely, membranes, polymer membranes, flat membranes, * filtration units * [ membrane modules ] , ion exchange membranes, hydrogen electrolysis membranes being parts of water and air treatment equipment; Scientific research and development; electrochemical research services; research and development of new products; research and development in the field of chemistry, filtration and water treatment; industrial process development.