The effect of Li_2CO_3 substitution on synthesis of LiBOB compounds as salt of electrolyte battery lithium ion

摘要

Development of the synthesis of LiB(C_2O_4)_2 compounds continues to evolve along with the need for electrolyte salts to support the research of the manufacture of lithium ion batteries. A study had been conducted on the effect of Li_2CO_3 substitution on the synthesis of LiB(C_2O_4)_2 or LiBOB compounds. LiBOB was a major candidate to replace LiPF6 as a highly toxic lithium battery electrolyte and harmful to human health. Synthesis of Lithium bis(oxalato) borate used powder metallurgy method. The raw materials used are H_2C_2O_4.2H_2O, Li_2CO_3 or LiOH and H_2BO_3 from Merck Germany products. The materials are mixed with 2: 1: 1 mol ratio until homogeneous. The synthesis of LiBOB refers to previous research, where the heating process was done gradually. The first stage heating is carried out at 120°C for 4 hours, then the next stage heating is carried out at 240°C for 7 hours. The sample variation in this study was to distinguish the lithium source from Li_2CO_3 and LiOH. Characterization was done by XRD to know the phase formed, FTIR to confirm that functional group of LiB(C_2O_4)_2 compound, SEM to know the morphological structure, and TG/DTA to know the thermal properties. The results of the analysis shows that LiBOB synthesis using Lithium source from Li_2CO_3 has succeeded to form LiBOB compound with more LiBOB phase composition is 59.1% and 40.9% LiBOB hydrate phase, SEM morphology shows powder consist of elongated round particle porous and similar to LiBOB commercial and show higher thermal stability.