CNTs have the intrinsic characteristics desired in material used as electrodes in batteries and capacitors, two technologies of rapidly increasing importance. CNTs have a tremendously high surface area (~1000 m2/g!!), good electrical conductivity, and very importantly, their linear geometry makes their surface highly accessible to the electrolyte. Research has shown that CNTs have the highest reversible capacity of any carbon material for use in lithium-ion batteries. In addition, CNTs are outstanding materials for supercapacitor electrodes and are now being marketed for this application.CNTs also have applications in a variety of fuel cell components. They have a number of properties, including high surface area and thermal conductivity, which make them useful as electrode catalyst supports in PEM fuel cells. They may also be used in gas diffusion layers, as well as current collectors, because of their high electrical conductivity. CNTs' high strength and toughness-to-weight characteristics may also prove valuable as part of composite components in fuel cells that are deployed in transport applications, where durability is extremely important.
CNTsにも、いろいろな燃料電池構成要素でアプリケーションがあります。彼らには高い表面積と熱伝導率を含むいくつかの特性があります。そして、それは彼らをPEM燃料電池の電極促進剤支持物として有効にします。彼らの高い電気伝導度のため、彼らがガス拡散浸透層（集電装置と同様に）でも使われるかもしれません。CNTsの高い強さと重さへの強さ特徴は輸送アプリケーションで配備される燃料電池で複合部品の一部として貴重であるとわかりもするかもしれません、そこで、耐久性はとても重要です。
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