A facile and general method for the oriented assembly of uniform carbon-confined metal oxide nanodots on graphene was developed via a well-designed process including surfactant-induced assembly, mismatched coordination reaction and subsequent in situ carbonization. On the basis of experimental analyses and density functional theory calculations, the key mismatched coordination reaction mechanism is clearly revealed, resulting in the formation of small amorphous metal–ligand complexes. This versatile oriented assembly strategy is then generally applied to obtain various carbon-confined metal oxide (SnO₂, Cr₂O₃, Fe₃O₄ and Al₂O₃) nanodots on graphene. Notably, the as-prepared C@SnO₂@Gr electrode as an LIB anode material possesses a high reversible discharge capacity of 702 mA h g⁻¹ and an excellent capacity retention of over 100% tested at 2 A g⁻¹ after 1200 cycles.

中文翻译：

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石墨烯上均匀分布的碳约束金属氧化物纳米点的一般定向组装，可实现稳定和超快的锂存储†

通过精心设计的过程，包括表面活性剂诱导的组装，错配的配位反应和随后的原位碳化，开发了一种在石墨烯上均匀组装碳限制的金属氧化物纳米点的定向组装的简便而通用的方法。在实验分析和密度泛函理论计算的基础上，清楚地揭示了关键的不匹配配位反应机理，从而导致了小的非晶态金属-配体络合物的形成。然后，通常将这种通用的定向组装策略应用于获得各种含碳金属氧化物（SnO ₂，Cr ₂ O ₃，Fe ₃ O ₄和Al ₂ O₃）石墨烯上的纳米点。值得注意的是，作为LIB阳极材料制备的C @ SnO ₂ @Gr电极具有1200mA hg ^-1的高可逆放电容量和1200次循环后在2 A g ^-1下测试的优异的容量保持率超过100％。