Cao Daxian, Sun Xiao, Li Yejing, Anderson Alexander, Lu Wenquan, Zhu Hongli
Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, 02115, USA.
Chemical Science and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA.
Adv Mater. 2022 Jun;34(24):e2200401. doi: 10.1002/adma.202200401. Epub 2022 May 10.
The anode plays a critical role relating to the energy density in all-solid-state lithium batteries (ASLBs). Silicon (Si) and lithium (Li) metal are two of the most attractive anodes because of their ultrahigh theoretical capacities. However, most investigations focus on Li metal, leaving the great potential of Si underrated. This work investigates the stability, processability, and cost of Si anodes in ASLBs and compares them with Li metal. Moreover, single-crystal LiNi Mn Co O is stabilized with lithium silicate (Li SiO ) through a scalable sol-gel method. ASLBs with a cell-level energy density of 285 Wh kg are obtained by sandwiching the Si anode, the thin sulfide solid-state electrolyte membrane, and the interface stabilized LiNi Mn Co O . The full cell delivers a high capacity of 145 mAh g at C/3 and maintains stability for 1000 cycles. This work inspires commercialization of ASLBs on a large scale with exciting manufacturing lines for large-scale, safe, and economical energy storage.
阳极在全固态锂电池（ASLB）的能量密度方面起着关键作用。硅（Si）和锂（Li）金属是两种极具吸引力的阳极，因其具有超高的理论容量。然而，大多数研究都集中在锂金属上，使得硅的巨大潜力被低估。这项工作研究了全固态锂电池中硅阳极的稳定性、可加工性和成本，并将其与锂金属进行了比较。此外，通过可扩展的溶胶 - 凝胶法用硅酸锂（Li₂SiO₃）稳定了单晶LiNiMnCoO₂。通过将硅阳极、薄硫化物固态电解质膜和界面稳定的LiNiMnCoO₂夹在一起，获得了电池级能量密度为285 Wh/kg的全固态锂电池。该全电池在C/3倍率下提供145 mAh/g的高容量，并保持1000次循环的稳定性。这项工作通过令人兴奋的大规模、安全且经济的储能生产线，推动了全固态锂电池的大规模商业化。
