Incorporating Ionic Paths into 3D Conducting Scaffolds for High Volumetric and Areal Capacity, High Rate Lithium‐Metal Anodes

• DOI: 10.1002/adma.201801328
• Publication Date: 2018-07-02T05:37:30Z
• Authors: Chanyuan Zhang; Shan Liu; Guojie Li; Cuijuan Zhang; Xingjiang Liu; Jiayan Luo
• Keywords: Lithium metal

Abstract Lithium‐metal batteries can fulfill the ever‐growing demand of high‐energy‐density requirement electronics and electric vehicles. However, lithium‐metal anodes have many challenges, especially their inhomogeneous dendritic formation infinite dimensional change during cycling. 3D scaffold design mitigate electrode thickness fluctuation regulate deposition morphology. in an insulating or ion‐conducting matrix, Li as exclusive electron conductor become disconnected, whereas electron‐conducting rate performance is restrained by sluggish + diffusion. Herein, advantages both ion‐ paths are integrated into a mixed scaffold. In network, charge diffusion distribution facilitated leading to significantly improved electrochemical performance. By incorporating 6.4 La 3 Zr 2 Al 0.2 O 12 nanoparticles carbon nanofibers scaffold, metal deliver areal capacity 16 mAh cm −2 , volumetric 1600 −3 remain stable over 1000 h under current density 5 mA . The capacities well capability among highest values reported. It anticipated that could be combined with further electrolytes cathodes develop high‐performance energy systems.