Hussain Shahzad, Amade Roger, Jover Eric, Bertran Enric
FEMAN Group, IN2UB, Department de Física Aplicada i Òptica, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Catalonia, Spain.
ScientificWorldJournal. 2013 Nov 19;2013:832581. doi: 10.1155/2013/832581. eCollection 2013.
A water plasma treatment applied to vertically-aligned multiwall carbon nanotubes (CNTs) synthesized by plasma enhanced chemical vapour deposition gives rise to surface functionalization and purification of the CNTs, along with an improvement of their electrochemical properties. Additional increase of their charge storage capability is achieved by anodic deposition of manganese dioxide lining the surface of plasma-treated nanotubes. The morphology (nanoflower, layer, or needle-like structure) and oxidation state of manganese oxide depend on the voltage window applied during charge-discharge measurements and are found to be key points for improved efficiency of capacitor devices. MnO2/CNTs nanocomposites exhibit an increase in their specific capacitance from 678 Fg(-1), for untreated CNTs, up to 750 Fg(-1), for water plasma-treated CNTs.
将水等离子体处理应用于通过等离子体增强化学气相沉积法合成的垂直排列多壁碳纳米管（CNT），可实现CNT的表面功能化和纯化，同时改善其电化学性能。通过在经等离子体处理的纳米管表面阳极沉积二氧化锰，可进一步提高其电荷存储能力。氧化锰的形态（纳米花、层状或针状结构）和氧化态取决于充放电测量过程中施加的电压窗口，并且被发现是提高电容器器件效率的关键点。MnO₂/CNT纳米复合材料的比电容从未处理CNT的678 Fg⁻¹增加到水等离子体处理CNT的750 Fg⁻¹。
