Current Advancements in Energy Storage Materials Research at the CPC Green Energy Research Institute

Jen-Hsien Huang (黃任賢)

Green Technology Research Institute (台灣中油綠能科技研究所)

Abstract:

To enhance fuel quality and mitigate air pollution, CPC Corporation, Taiwan must effectively reduce the sulfur content in petroleum products. To achieve this, catalysts are introduced during the refining process to facilitate hydrodesulfurization reactions. However, prolonged use of these catalysts often leads to a decline in activity due to fouling and poisoning caused by the accumulation of organic compounds and metallic impurities. Once the catalytic activity falls below the required threshold for processing, the spent catalysts must be replaced. These deactivated catalysts are classified as hazardous industrial waste, entailing high disposal costs and posing potential environmental risks. This study aims to recover high-value vanadium metal from spent catalysts and subsequently synthesize vanadium pentoxide (V2O5). The recovered V2O5 is then combined with lithium carbonate (Li2CO3) through a spray granulation method to produce lithium vanadate (Li3VO4, abbreviated as LVO) anode materials, which exhibit fast-charging capability. The synthesized LVO anode demonstrates specific capacities of 349.8 and 228.7 mAh/g at current rates of 0.1C and 10C, respectively, and retains 91.4% of its capacity after 200 charge–discharge cycles, indicating excellent rate performance and cycling stability.