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electrode : ウィキペディア英語版
electrode

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air). The word was coined by William Whewell at the request of the scientist Michael Faraday from the Greek words ''elektron'', meaning amber (from which the word electricity is derived), and ''hodos'', a way.〔 ( (in which Faraday coins the words ''electrode'', ''anode'', ''cathode'', ''anion'', ''cation'', ''electrolyte'', ''electrolyze'')〕
== Anode and cathode in electrochemical cells ==

An electrode in an electrochemical cell is referred to as either an ''anode'' or a ''cathode'' (words that were coined by William Whewell at Faraday's request).〔 The anode is now defined as the electrode at which electrons leave the cell and oxidation occurs, and the cathode as the electrode at which electrons enter the cell and reduction occurs. Each electrode may become either the anode or the cathode depending on the direction of current through the cell. A bipolar electrode is an electrode that functions as the anode of one cell and the cathode of another cell.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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