Many studies have been reported for not only efficient production of hydrogen via SOECs but also high performed SOFCs, and La1-xSrxGa1-yMgyO3-δ (LSGM), a substitute for yttria-stabilized zirconia (YSZ) has emerged as a rising candidate for the electrolyte due to its superior ionic conductivity even in intermediate temperature (≤1073K). Since solid oxide electrochemical devices with LSGM can work in intermediate temperatures, it can have better durability and efficiency at lower temperature operating conditions. However, a few essential requirements must still be addresses for the widespread use of commercial LSGM based electrochemical device; their lower mechanical strengths and higher reactivity with electrode compared to the YSZ based electrolyte makes it difficult to find a cost-effective manufacturing process and compatible materials. In this regard, several strategies for advanced manufacturing have been carried for competitive commercialization of LSGM based SOCs at KICET: (a) lowering temperature processing, (b) ultra-thinner self-standing electrolyte, (c) non-touchable electrode coating processing, and (d) optimal buffer layer. Our innovative activity on the recent LSGM based SOCs will be discussed in detail.Consequently, the fabricated cell exhibits outstanding maximum power density of 1.40 W cm-2 with the ohmic resistance of 0.131 Ω cm2 at 1073K through the effects of the thinner buffer layer and modified electrode surface via the simple-step sonic spraying technique. When the higher electrolysis performance was, subsequently, achieved on reverse SOC operation mode; a high current density of 1.01 A cm-2 at 1073 K, when applied 1.3 V. Fig. (a) The cell performance using nano CMF decorated LSCM cathode on (a) fuel cell (H2 fuel) Figure 1