Jin Dalai, Zhou Jiamin, Yang Tianpeng, Li Saisai, Wang Lina, Cai Yurong, Wang Longcheng
Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Xiasha Town, Hangzhou 310018, China.
School of Materials Science and Engineering, Zhejiang Sci-Tech University, Xiasha Town, Hangzhou 310018, China.
Nanomaterials (Basel). 2021 Jun 23;11(7):1649. doi: 10.3390/nano11071649.
The advantage of low resistivity and inactive binders makes binder-free electrode an excellent candidate for high-performance energy devices. A simple hydrothermal method was used to fabricate M(HPO)(OH) (M: Ni and Co) (MHP) arrays combined with activated carbon fabric (ACF) without binder. The structures of MHP can be easily tuned from bouquets to nano-sheets by the concentration of NaHPO. The MHP/ACF composite materials with different structures showed the typical battery-type characteristic of anodic electrodes. In a three-electrode cell configuration, the MHP nano-sheet arrays/ACF composite has a higher capacity, of 1254 F/g, at a scan rate of 10 mA/cm and shows better cycling stability: 84.3% remaining specific capacity after 1000 cycles of charge-discharge measurement. The composite is highly flexible, with almost the same electrochemical performance under stretching mode. The MHP/ACF composite@ACF hybrid supercapacitor can deliver the highest energy density, of 34.1 Wh·kg, and a power density of 722 W·kg at 1 A·g. As indicated by the results, MHP/ACF composite materials are excellent binder-free electrodes, candidates for flexible high-performance hybrid super-capacitor devices.
低电阻率和惰性粘合剂的优势使无粘合剂电极成为高性能能量装置的理想选择。采用简单的水热法制备了与活性炭织物（ACF）结合的无粘合剂的M(HPO)(OH)（M：Ni和Co）（MHP）阵列。通过改变NaHPO的浓度，MHP的结构可以很容易地从束状调整为纳米片。不同结构的MHP/ACF复合材料表现出典型的阳极电池型特性。在三电极电池配置中，MHP纳米片阵列/ACF复合材料在扫描速率为10 mA/cm²时具有更高的容量，为1254 F/g，并且显示出更好的循环稳定性：在1000次充放电测量后，剩余比容量为84.3%。该复合材料具有高度的柔韧性，在拉伸模式下具有几乎相同的电化学性能。MHP/ACF复合@ACF混合超级电容器在1 A·g时可提供最高能量密度34.1 Wh·kg⁻¹和功率密度722 W·kg⁻¹。结果表明，MHP/ACF复合材料是优异的无粘合剂电极，是柔性高性能混合超级电容器装置的候选材料。
