Bulk-type all-solid-state lithium batteries (ASSLBs) are being considered as a promising technology to improve the safety and energy density of today's batteries. However, current bulk-type ASSLBs suffer from low cell-level energy density due to the challenges in reducing the electrolyte thickness. In this work, we report cathode-supported ASSLBs with a thin solid electrolyte layer. Starting from a stainless steel mesh-supported Li 2 S cathode, we are able to build an ASSLB with a ∼100 μm thick Li 3 PS 4 electrolyte reinforced by a Kevlar nonwoven scaffold and with Li metal as the anode. The ASSLB delivers a high capacity with high rate and cycling performances at room temperature. Moreover, the unique cell design also enabled utilization of a thick cathode with a Li 2 S loading of 7.64 mg cm −2 , providing a high cell-level energy density (excluding the current collectors) of 370.6 Wh kg −1 for the first cycle.
A novel high-quality MoS2-doped Li2S–P2S5glass-ceramic electrolyte (Li7P2.9S10.85Mo0.01) is successfully prepared by a facile combined method of high-energy ball milling plus annealing. The Li7P2.9S10.85Mo0.01electrolyte shows a high ionic conductivity and excellent electrochemical stability.
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