PDF(Pubmed)
Abstract：
Intrinsic impediments, namely weak mechanical strength, low ionic conductivity, low electrochemical performance, and stability have largely inhibited beyond practical applications of hydrogels in electronic devices and remains as a significant challenge in the scientific world. Here, we report a biospecies-derived genomic DNA hybrid gel electrolyte with many synergistic effects, including robust mechanical properties (mechanical strength and elongation of 6.98 MPa and 997.42%, respectively) and ion migration channels, which consequently demonstrated high ionic conductivity (73.27 mS/cm) and superior electrochemical stability (1.64 V). Notably, when applied to a supercapacitor the hybrid gel-based devices exhibit a specific capacitance of 425 F/g. Furthermore, it maintained rapid charging/discharging with a capacitance retention rate of 93.8% after ∼200,000 cycles while exhibiting a maximum energy density of 35.07 Wh/kg and a maximum power density of 193.9 kW/kg. This represents the best value among the current supercapacitors and can be immediately applied to minicars, solar cells, and LED lightning. The widespread use of DNA gel electrolytes will revolutionize human efforts to industrialize high-performance green energy.
摘要：
内在障碍，即机械强度弱，低离子电导率，低电化学性能，和稳定性在很大程度上抑制了水凝胶在电子设备中的实际应用，并且仍然是科学界的重大挑战。这里,我们报道了一种生物物种来源的基因组DNA混合凝胶电解质，具有许多协同作用，包括坚固的机械性能（机械强度和伸长率为6.98MPa和997.42%，分别)和离子迁移通道，其因此表现出高离子电导率(73.27mS/cm)和优异的电化学稳定性(1.64V)。值得注意的是,当应用于超级电容器时,基于混合凝胶的装置表现出425F/g的比电容。此外，在~200,000次循环后，它保持快速充电/放电，电容保持率为93.8%，同时表现出35.07Wh/kg的最大能量密度和193.9kW/kg的最大功率密度。这代表了当前超级电容器中的最佳值，可以立即应用于微型车，太阳能电池,LED闪电DNA凝胶电解质的广泛使用将彻底改变人类将高性能绿色能源产业化的努力。
