Li Ning, Sun Meiling, Kan Wang Hay, Zhuo Zengqing, Hwang Sooyeon, Renfrew Sara E, Avdeev Maxim, Huq Ashfia, McCloskey Bryan D, Su Dong, Yang Wanli, Tong Wei
Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
Dongguan Neutron Science Center, Dongguan, Guangdong, 523803, China.
Nat Commun. 2021 Apr 20;12(1):2348. doi: 10.1038/s41467-021-22527-z.
The dependence on lithium-ion batteries leads to a pressing demand for advanced cathode materials. We demonstrate a new concept of layered-rocksalt intergrown structure that harnesses the combined figures of merit from each phase, including high capacity of layered and rocksalt phases, good kinetics of layered oxide and structural advantage of rocksalt. Based on this concept, lithium nickel ruthenium oxide of a main layered structure (R[Formula: see text]m) with intergrown rocksalt (Fm[Formula: see text]m) is developed, which delivers a high capacity with good rate performance. The interwoven rocksalt structure successfully prevents the anisotropic structural change that is typical for layered oxide, enabling a nearly zero-strain operation upon high-capacity cycling. Furthermore, a design principle is successfully extrapolated and experimentally verified in a series of compositions. Here, we show the success of such layered-rocksalt intergrown structure exemplifies a new battery electrode design concept and opens up a vast space of compositions to develop high-performance intergrown cathode materials.
对锂离子电池的依赖导致了对先进阴极材料的迫切需求。我们展示了一种层状岩盐共生结构的新概念，该结构利用了各相的综合品质因数，包括层状相和岩盐相的高容量、层状氧化物的良好动力学以及岩盐的结构优势。基于这一概念，开发了一种具有岩盐（Fm[公式：见正文]m）共生的主要层状结构（R[公式：见正文]m）的锂镍钌氧化物，其具有高容量和良好的倍率性能。交织的岩盐结构成功地防止了层状氧化物典型的各向异性结构变化，使得在高容量循环时能够实现近乎零应变操作。此外，在一系列成分中成功地推断并通过实验验证了一种设计原则。在此，我们表明这种层状岩盐共生结构的成功例证了一种新的电池电极设计概念，并为开发高性能共生阴极材料开辟了广阔的成分空间。
