Lithium–carbon dioxide (Li–CO2) battery represents a high‐energy density energy storage with excellent real‐time CO2 enrichment and conversion, but its practical utilization is hampered by the development of an excellent catalytic cathode. Here, the synergistic catalytic strategy of designing CoRu bimetallic active sites achieves the electrocatalytic conversion of CO2 and the efficient decomposition of the discharge products, which in turn realizes the smooth operation of the Li–CO2 battery. Moreover, obtained support based on metal–organic frameworks precursors facilitates the convenient diffusion and adsorption of CO2, resulting in higher reaction concentration and lower mass transfer resistance. Meanwhile, the optimization of the interfacial electronic structure and the effective transfer of electrons are achieved by virtue of the strong interaction of CoRu at the support interface. As a result, the Li–CO2 cell assembled based on bimetallic CoRu active sites achieved a discharge capacity of 19,111 mA h g−1 and a steady‐state discharge voltage of 2.58 V as well as a cycle life of >175 cycles at a rate of 100 mA g−1. Further experiments combined with density‐functional theory calculations achieve a deeply view of the connection between cathode and electrochemical performance and pave a way for the subsequent development of advanced Li–CO2 catalytic cathodes.

中文翻译：

---

为增强型锂二氧化碳电池阴极创建 CoRu 双活性位点编码稳定多孔二氧化铈支撑


锂二氧化碳（Li-CO2）电池代表了一种高能量密度的能量存储，具有出色的实时CO2富集和转化能力，但其实际应用受到优异催化阴极开发的阻碍。这里，设计CoRu双金属活性位点的协同催化策略实现了CO2的电催化转化和放电产物的高效分解，从而实现了Li-CO2电池的平稳运行。此外，基于金属有机骨架前驱体获得的载体有利于CO2的方便扩散和吸附，从而导致更高的反应浓度和更低的传质阻力。同时，借助CoRu在支撑界面的强相互作用，实现了界面电子结构的优化和电子的有效转移。结果，基于双金属CoRu活性位点组装的Li-CO2电池实现了19,111 mA h g−1的放电容量和2.58 V的稳态放电电压以及> 175次循环的循环寿命。 100 mA g−1。进一步的实验与密度泛函理论计算相结合，深入了解了正极与电化学性能之间的联系，为后续开发先进的Li-CO2催化正极铺平了道路。