Layered-rocksalt intergrown cathode for high-capacity zero-strain battery operation

Ning Li, Meiling Sun, Wang Hay Kan, Zengqing Zhuo, Sooyeon Hwang, Sara E. Renfrew, Maxim Avdeev, Ashfia Huq, Bryan D. McCloskey, Dong Su, Wanli Yang () and Wei Tong ()
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Ning Li: Lawrence Berkeley National Laboratory
Meiling Sun: Lawrence Berkeley National Laboratory
Wang Hay Kan: Dongguan Neutron Science Center
Zengqing Zhuo: Advanced Light Source, Lawrence Berkeley National Laboratory
Sooyeon Hwang: Center for Functional Nanomaterials, Brookhaven National Laboratory
Sara E. Renfrew: University of California
Maxim Avdeev: Australian Nuclear Science and Technology Organisation (ANSTO)
Ashfia Huq: Neutron Scattering Science Directorate, Oak Ridge National Laboratory
Bryan D. McCloskey: Lawrence Berkeley National Laboratory
Dong Su: Center for Functional Nanomaterials, Brookhaven National Laboratory
Wanli Yang: Advanced Light Source, Lawrence Berkeley National Laboratory
Wei Tong: Lawrence Berkeley National Laboratory

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract 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 $$\bar{3}$$ 3 ¯ m) with intergrown rocksalt (Fm $$\bar{3}$$ 3 ¯ 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.

Date: 2021
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DOI: 10.1038/s41467-021-22527-z

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