High areal capacity LiNi1/3Co1/3Mn1/3O2 positive composite electrode employing an oxide solid electrolyte for an all-solid-state lithium-ion battery

All-solid-state lithium-ion batteries with inorganic oxide solid electrolytes (SEs) are considered a suitable choice for next-generation batteries because of their superior safety. Using highly deformable oxide glass electrolytes, in particular, the cold press can effectively improve inter-particle contact and improve battery performance. This study focuses on LiNi1/3Co1/3Mn1/3O2(NCM) positive composite electrodes employing a glass electrolyte system with excellent deformable properties composed of 0.45Li2SO4–0.30Li2CO3–0.25LiBr (LSCB). Cyclic voltammetry of LSCB reveals that no significant redox peaks occur until 4.5 V, making it a suitable SE material for NCM positive composite electrodes. At 0.064 mA cm−2 and 25 °C, a NCM positive composite electrode containing 30 wt% of LSCB produced via cold pressing exhibits a relatively high specific capacity of 128 mAh g−1(NCM) and an areal capacity of 2.3 mAh cm−2. Further, this study reports results for a NCM-Si full-battery cell with a relatively high areal capacity of 2.1 mAh cm−2 and a specific energy density of 205 Wh kg−1(positive and negative composite electrodes) at 0.064 mA cm−2 and 25 °C.