An all-solid-state Li battery (ASSLB) is believed to be one of the most promising candidates to achieve high energy density of 500 Wh kg–1.After extensive exploration, several sulfide solid electrolytes have been synthesized with ionic conductivities in the order of 10–3 S cm–1 or even higher[1, 2]. With the successful development of various SSE materials, the major obstacle remaining is to demonstrate high energy density at a cell or battery level. Pelleting, dry processing, slurry coating, extrusion, and embedding into template have been explored for the manufacture of an SSE[3]. Despite the high energy density at the material-level and the electrode-level, the cell-level energy density of pellet format was still rather unsatisfactory (<50 Wh kg-1), which was mainly due to the thick SSE pellet (0.5–1 mm). Besides, the pelletizing process itself can only be limited to lab-scale research due to its high cost and poor practicability.To boost cell-level energy density and render the mass production feasible, sheet-type cells with a thin SSE and a thick cathode have been recognized as a “must-develop” technology within the battery community. Dry processing of SSE and electrode was developed using sulfur carbon as the cathode and sulfide Li6PS5Cl as the electrolyte. A small amount of PTFE (0.75% in SSE and 1% in cathode) was applied as the binder. After grinding and rolling at 80 oC, the sheet-type cathode (2*3.5 cm2) and SSE (2.4*3.9 cm2) with respective thickness of 90 and 200 um were obtained. With LiIn alloy as the anode, the pouch cell delivered a discharge capacity of 1200 mAh g–1 at 0.05C after the first cycle activation at 60 oC. The results indicated the feasibility of dry processing technology to fabricate sheet-type SSE and electrode.Figure 1. Voltage curves of the pouch cell during the first three cycles tested at 0.05C at 60 oC.(1) Kato, Y.; Hori, S.; Saito, T.; Suzuki, K.; Hirayama, M.; Mitsui, A.; Yonemura, M.; Iba, H.; Kanno, R. High-Power All-Solid-State Batteries Using Sulfide Superionic Conductors. Nat. Energy 2016, 1, 1–7.(2) Kamaya, N.; Homma, K.; Yamakawa, Y.; Hirayama, M.; Kanno, R.; Yonemura, M.; Kamiyama, T.; Kato, Y.; Hama, S.; Kawamoto, K.; Mitsui, A. A Lithium Superionic Conductor. Nat. Mater. 2011, 10, 682–686.(3) Emley, B.; Liang, Y.; Chen, R.; Wu, C.; Pan, M.; Fan, Z.; Yao, Y. On the Quality of Tape-Cast Thin Films of Sulfide Electrolytes for Solid-State Batteries. Mater. Today Phys. 2021, 18. 100397. Figure 1