Xu Hanping, Lei Zijie, Xu Mincai, Zhu Jingqiao, Song Xianliang, Jin Xiaojuan
Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, 35 Qinghua East Road, Haidian, Beijing 100083, China.
Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, 35 Qinghua East Road, Haidian, Beijing 100083, China.
Int J Biol Macromol. 2023 May 1;236:123934. doi: 10.1016/j.ijbiomac.2023.123934. Epub 2023 Mar 8.
This work demonstrates a facile and effective strategy for the preparation of a reduced graphene oxide/carboxymethylcellulose-polyaniline (RGO/CMC-PANI) hybrid film electrode. Specifically, through the hydrogen bonding interaction between -OH of CMC molecules and -NH of aniline monomer, PANI grows in an ordered manner on the surface of CMC, which effectively alleviates the structural collapse of PANI during the continuous charge/discharge process. After compounding with RGO, CMC-PANI bridges adjacent RGO sheets to form a complete conductive path, and opens the gap between RGO sheet layers to obtain fast ion channels. As a result, the RGO/CMC-PANI electrode exhibits excellent electrochemical performance. Moreover, an asymmetric supercapacitor was fabricated using RGO/CMC-PANI as the anode and TiCT as the cathode. The results show that the device has a large specific capacitance of 450 mF cm (81.8 F g) at 1 mA cm and a high energy density of 140.6 μWh cm at a power density of 749.9 μW cm. Besides, 87.3 % initial capacitance and 100 % good coulombic efficiency can be maintained even after 20,000 GCD cycles. Therefore, the device has a broad application prospect in the field of new-generation microelectronic energy storage.
这项工作展示了一种简便有效的策略来制备还原氧化石墨烯/羧甲基纤维素-聚苯胺（RGO/CMC-PANI）复合薄膜电极。具体而言，通过CMC分子的-OH与苯胺单体的-NH之间的氢键相互作用，聚苯胺在CMC表面有序生长，这有效地缓解了聚苯胺在连续充放电过程中的结构坍塌。与RGO复合后，CMC-PANI连接相邻的RGO片层形成完整的导电路径，并打开RGO片层间的间隙以获得快速离子通道。结果，RGO/CMC-PANI电极表现出优异的电化学性能。此外，使用RGO/CMC-PANI作为阳极和TiCT作为阴极制备了不对称超级电容器。结果表明，该器件在1 mA cm时具有450 mF cm（81.8 F g）的大比电容，在功率密度为749.9 μW cm时具有140.6 μWh cm的高能量密度。此外，即使经过20,000次恒流充放电循环，仍可保持87.3%的初始电容和100%良好的库仑效率。因此，该器件在新一代微电子储能领域具有广阔的应用前景。
