Using the concept of bionics and circular economy to develop low-cost and high -performance flexible electrodes and ionic liquid polyelectrolytes for all solid-state flexible supercapacitors. This type of flexible electrode has excellent dimensional stability and electrochemical characteristics. The gel-state polyelectrolytes can be used with metal oxide electrodes to provide high scalability, low cost, and high efficiency at high temperatures.
We used in-situ X-ray absorption near-edge spectroscopy to understand energy storage mechanism of the flexible all-solid-state supercapactors. Experimental results from synchrotron based X-ray techniques showed that the electrode’s structure features a 3D ant-nest-like framework composed of 2D nacre-like clay nanosheets, i.e. hierarchical layers-within-networks structure. We have also discovery a series of ionic liquid polyelectrolytes, which have good stability and energy storage performance in high-temperature tests and rapid charge-discharge tests.
We propose an environmentally friendly, low-cost, and scalable method for manufacturing structural electrodes and a low-cost ionic liquid polyelectrolyte. Flexible all-solid-state supercapacitors combined with this series of polyelectrolytes have excellent performance under high temperature operation, which can solve the high temperature generated from excessive electronic devices. Our polyelectrolytes also solve safety concerns, because it is a gel state polyelectrolyte can improve electrolyte leakage and other problems.

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