Scientists from the Materials Research Center of the Institute of Modern Physics (IMP) at the Chinese Academy of Sciences (CAS) and Beihang University have put forth a novel 3D host configuration for lithium anodes utilizing the nuclear track method. Their findings were published in Advanced Energy Materials.
Finding optimal host configurations for high-performance battery anode materials is a crucial scientific pursuit. Lithium metal anodes have emerged as the most promising contender for next-generation energy storage batteries. However, challenges like dendrite growth during cycling have impeded their commercial application. Hence, the development of lithium anode host configurations that combine high energy density, high power density, and high cycling stability holds immense significance for the advancement of high-performance lithium-ion batteries.
Leveraging the Heavy Ion Research Facility in Lanzhou (HIRFL), the researchers have devised a new 3D porous composite host structure employing nuclear track technology. This composite host structure comprises a 3D copper framework embedded with evenly distributed lithiophilic sites.
The composite 3D host-lithium anode demonstrates an exceptional cycle life exceeding 2000 hours and exhibits high-rate capabilities. Even when subjected to a high area capacity and high current density, it maintains stable cycling performance after 600 hours.
In comparison to other hosts constructed using identical materials, the electrochemical performance of the porous composite host structure in this study exhibits significant enhancement. The researchers identified the high mechanical strength, high porosity, and low tortuosity of this structure as the primary factors contributing to the improved battery performance.
This study holds great significance for the exploration of high-performance anode materials and offers a potential solution to the key challenges associated with lithium metal anodes.
Source: Chinese Academy of Sciences