Aqueous suspensions of multi-wall carbon nanotubes (MWNTs) in dilute H2SO4 were sprayed onto both sides of a Nafion membrane and dried to fabricate flexible solid-state supercapacitors. A single cell with MWNT-only electrodes had a capacitance of 57 F g−1 per electrode at 2 mV s−1 and 44 F g−1 at 150 mV s−1 but with low H+ mobility. Cells with MWNT + ionomer hybrid electrodes showed higher H+ mobility, and the electric double layer (EDL) capacitance increased to 145 F g−1 at 2 mV s−1 and 91 F g−1 at 150 mV s−1. The energy and power densities of one electrode charged to 1 V at 1 A g−1 were 12.9 Wh kg−1 and 3.3 kW kg−1 respectively. Three solid-state supercapacitor cells connected in series charged to 3 V at 1 and 2 A g−1 provided a device power density of 8.9 kW kg−1 at 1 A g−1 and 9.4 kW kg−1 at 2 A g−1, the highest for all-solid-state EDL supercapacitors.
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机译：将多壁碳纳米管（MWNT）在稀H2SO4中的水悬浮液喷雾到Nafion膜的两面上，并干燥以制造柔性固态超级电容器。仅具有MWNT电极的单电池在2μmVs -1 和44μFg -1 下每个电极的电容为57 F g -1 sup>在150 mV s -1 ，但具有低H + 迁移率。带有MWNT +离聚物混合电极的电池表现出更高的H + 迁移率，并且在2 mV s 下双电层（EDL）电容增加至145 F g -1 -1 和91 F g -1 在150 mV s -1 。在1 A g -1 下充电至1 V的一个电极的能量和功率密度为12.9 Wh kg -1 和3.3 kW kg -1 分别。三个串联的固态超级电容器单元在1和2 A g -1 下充电至3 V，在1 A g下提供了8.9 kW kg -1 的器件功率密度 -1 和9.4 kW kg -1 在2 atA g -1 时，对于全固态EDL超级电容器而言最高。
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