Yaolong Yin

With the rapid development of the world economy and transportation, the demand for cross-sea tunnels to meet human production and movement is becoming more and more urgent, and extra-long undersea tunnels are becoming more common [[1], [2], [3], [4], [5]].

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Construction of high-energy density asymmetric supercapacitors is often hindered by unsatisfactory matching between anode and cathode. Thus, it is crucial to develop composite anodes with high specific capacitance to match that of cathodes.