School of Advanced Materials, Peking University, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
Chem Commun (Camb). 2018 Sep 20;54(76):10714-10717. doi: 10.1039/c8cc04205e.
A single-source precursor NaCo(acac)3 (acac = acetylacetone) for layered oxide cathodes of sodium-ion batteries (SIBs) is reported here. It features a 1D chain structure, and is prepared in nearly quantitative yield employing commercially available reagents. The complex is stable in open air and tends to dissolve in various strongly polar solvents, including H2O and methanol. The phase-pure layered oxide cathode material P2-NaxCoO2 for SIBs is obtained through calcining the complex, and exhibits an excellent rate capability, even superior to the recently reported P2-NaxCoO2 microspheres. More analogue complexes could be obtained through cationic replacement for the synthesis of other high-performance layered metal oxides for SIBs.
本文报道了一种用于钠离子电池（SIBs）层状氧化物正极的单源前驱体 NaCo(acac)3（acac = 乙酰丙酮）。它具有一维链状结构，采用市售试剂几乎定量产率制备。该配合物在开放空气中稳定，倾向于溶解在各种强极性溶剂中，包括 H2O 和甲醇。通过煅烧该配合物得到了具有优异倍率性能的单相层状氧化物正极材料 P2-NaxCoO2，甚至优于最近报道的 P2-NaxCoO2 微球。通过阳离子取代可以得到更多类似的配合物，用于合成其他高性能的 SIBs 层状金属氧化物。
