Foldable and free-standing 3D network electrodes based on cellulose nanofibers, carbon nanotubes and elongated TiO2 nanotubes
Foldable and free-standing 3D network electrodes based on cellulose nanofibers, carbon nanotubes and elongated TiO2 nanotubes
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DOI：
10.1016/j.matlet.2015.06.008
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发表时间：
2015-11
影响因子：
3
通讯作者：
Fei Wang;Dagang Li
中科院分区：
文献类型：
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作者：
Fei Wang;Dagang Li
利用大孔纤维素纳米纤维（CNFs）作为支架，制备了可折叠和自支撑电极。多壁碳纳米管（MCNT）包裹在CNF周围作为导电皮肤，而细长的（数十微米）TiO 2纳米管（TNT）则贯穿在MCNT和大孔CNF网络中。电化学分析表明，混合电极在10 mV/s下具有62.5 mF/cm 2的高放电容量，并且具有良好的循环性能，在0.5 mA/cm 2下循环1000次后容量损失5%。该复合电极具有良好的机械性能，可以像纸飞机一样来回折叠而不会发生机械故障。因此，这种低成本、重量轻且可折叠的电极可以很好地应用于可折叠的全固态超级电容器。
Foldable and free-standing electrodes were fabricated using the macroporous cellulose nanofibers (CNFs) as the scaffold. Multi-walled carbon nanotubes (MCNTs) wrapped around the CNFs as the conductive skin, while the elongated (tens of microns) TiO2nanotubes (TNTs) were interpenetrated within the MCNTs and macroporous CNFs network. Electrochemical analysis indicated that the hybrid electrodes displayed a high discharge capacity of 62.5 mF/cm2at 10 mV/s and a good cyclability with a capacity loss 5% after 1000 cycles at 0.5 mA/cm2. The hybrid electrodes possessed highly mechanical property and could be folded back and forth as a paper airplane without mechanical failure. Therefore the low-cost, light-weight and foldable electrodes can be well applied as foldable all-solid-state supercapacitors.