Nanocrystalline coating electrodes, also named thin-film electrodes, have received more and more research interest in electrical energy storage devices because the thin-film electrode enhanced its conductivity leading to facilitate electron transfer, and avoid the use of polymer binders and conductive agent. Here, we review the progress and challenge of synthesizing thin-film electrodes as well as their specific electroactivities for Li-ion batteries and supercapacitors. Nanostructured metal oxide thin film with targeted physical properties directly grown on a metal substrate is also summarized. To fully exploit thin-film electrodes, the optimization of crystallization processes and electrochemical properties of coating or film are important for the development of highly active thin-film energy storage devices.

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纳米晶涂层及其电化学储能应用

纳米晶涂层电极，也称为薄膜电极，由于薄膜电极增强了其导电性，从而促进了电子转移，并且避免了使用聚合物粘合剂和导电剂，因此在电能存储装置中受到越来越多的研究兴趣。在这里，我们回顾了合成薄膜电极的进展和挑战，以及它们对锂离子电池和超级电容器的特定电活性。还总结了直接在金属基板上生长的具有目标物理特性的纳米结构金属氧化物薄膜。为了充分利用薄膜电极，优化结晶过程和涂层或薄膜的电化学性能对于开发高活性薄膜储能器件具有重要意义。