H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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H01M4/02
Electrodes composed of, or comprising, active material
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H01M4/36
Selection of substances as active materials, active masses, active liquids
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H01M4/381
Alkaline or alkaline earth metals elements
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