| http://www.w3.org/ns/prov#value | - The positive electrode has a three-layer structure constituted by a first positive electrode layer which is made of at least one of rhodium (Rh), ruthenium (Ru), and an alloy including at least one of these metals, a second positive electrode layer which is made of titanium (Ti), chromium (Cr), and an alloy including at least one of these metals, and formed directly on the first positive electrode
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