Anode

An anode is an electrode through which (positive) electric current flows into a polarized electrical device. Mnemonic: ACE (Anode Current Enters).To dispel a common misconception, often incorrectly inferred from the correct fact that in all electrochemical devices negatively charged anions move towards the anode and/or positively charged cations move away from it, anode polarity is not always positive but depends on the device type, and sometimes even in which mode it operates, as determined by the above current direction-based universal definition. Examples:In a discharging battery or galvanic cell (drawing) the anode is the negative terminal, where conventional current flows in. This inwards current is carried externally by electrons moving outwards, negative charge moving one way amounting to positive current flowing the other way. It is continued internally by positive ions moving into the electrolyte, i.e. surprisingly away from the more negative electrode and towards the more positive one (chemical energy is responsible for this "uphill" motion).In a recharging battery, or an electrolytic cell, the anode is the positive terminal, which receives current from an external generator.In a diode, it is the positive terminal at the tail of the arrow symbol, where current flows into the device. Note electrode naming for diodes is always based on the direction of the forward current (that of the arrow, in which the current flows "most easily"), even for types such as zener diodes or solar cells where the current of interest is the reverse current.In a cathode ray tube, it is the positive terminal where electrons flow out, i.e. where current flows in.
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En général, l'anode d'un élément passif inséré dans un circuit en courant continu est l'électrode où entre le courant électrique. Pour une résistance, c'est donc l'électrode reliée au pôle positif du générateur.
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Eine Anode (von gr. ἄνοδος, anodos, "Weg nach oben") ist eine Elektrode, die – beispielsweise aus einem Vakuum oder Elektrolyt – Elektronen aufnimmt, an der also eine Oxidationsreaktion stattfindet. Sie ist die Gegenelektrode zur Kathode, welche Elektronen abgibt. In früheren Jahren wurde die Anode(+) einer Röntgenröhre auch als Antikathode bezeichnet. Anionen(-) wandern zur Anode(+) und Kationen(+) zur Kathode(-).
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Anoda - rodzaj elektrody. Słowo anoda pochodzi z greki ανα (wychodzić) i 'οδος (droga, ścieżka) i oznacza dosłownie element, przez który ładunek ujemny opuszcza dany układ elektryczny lub do układu jest dostarczany ładunek dodatni. W zależności od charakteru układu (kierunku przepływającego przez nie  prądu elektrycznego), anoda może być elektrodą dodatnią lub ujemną i występuje zawsze w parze z elektrodą jej przeciwną pod względem znaku, czyli katodą.
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Nei sistemi elettrochimici, l'anodo è l'elettrodo sul quale avviene una reazione di ossidazione.Nel caso di una pila, l'ossidazione avviene spontaneamente e produce elettroni, quindi l'anodo è il polo negativo.Nel caso di una cella elettrolitica, l'ossidazione viene forzata sottraendo elettroni, quindi l'anodo è il polo positivo.
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