{"id":25850,"date":"2022-10-03T10:50:38","date_gmt":"2022-10-03T09:50:38","guid":{"rendered":"https:\/\/www.innovationnewsnetwork.com\/?p=25850"},"modified":"2022-10-03T10:50:38","modified_gmt":"2022-10-03T09:50:38","slug":"improving-safety-performance-lithium-ion-battery","status":"publish","type":"post","link":"https:\/\/www.innovationnewsnetwork.com\/improving-safety-performance-lithium-ion-battery\/25850\/","title":{"rendered":"Improving safety and performance of a lithium-ion battery"},"content":{"rendered":"
As the global effort toward carbon neutrality accelerates, automakers around the world are exploring ways to convert internal combustion engine vehicles into electric vehicles (EVs). There is a further effort to improve the performance of an EV\u2019s central battery technology, the lithium-ion battery. Lithium-ion batteries have held a dominant market share in most market segments since their commercialisation in 1991, thanks to the continuous improvement in energy density and efficiency.\u00a0<\/span>\u00a0<\/span><\/p>\n However, certain occurrences within this battery technology are not well understood, such as the expansion and deterioration of the anode material. To improve this knowledge, a research team from the <\/span>Korea Institute of Science and Technology<\/span><\/a>\u202f(KIST), led by Dr Jae-Pyoung Ahn (Research Resources Division) and Dr Hong-Kyu Kim (Advanced Analysis and Data Center), have succeeded in analysing the expansion and deterioration of the anode material within batteries, focusing on the movement of lithium ions.<\/span>\u00a0<\/span><\/p>\n Changes that occur in the internal electrode materials during the charging and discharging processes of a lithium-ion battery affect its performance and lifespan. Such changes are difficult to monitor during operation, however, because battery materials, such as electrodes and electrolytes, are instantly contaminated when exposed to the air. Because of this, the most important factor when improving performance and safety is the accurate observation and analysis of structural changes in the electrode material during lithium ion migration.\u00a0<\/span>\u00a0<\/span><\/p>\n During charging and discharging, the lithium ions move to the anode in a lithium-ion battery.\u00a0<\/span>\u00a0<\/span><\/p>\n The KIST research team succeeded in real-time observation of a silicon\u2013graphite composite anode, being studied for its commercial use as a high-capacity battery. <\/span>Silicon<\/span><\/a> has a charging capacity that is ten times higher than that of graphite, a material that is typically used in the anode of a battery. The volume of silicon nanopowders quadruples during the charging process, however, meaning that it is hard to guarantee performance and safety.<\/span>\u00a0<\/span><\/p>\nAccurate observation is vital to improving battery safety<\/h3>\n
Observing a silicon-graphite composite anode<\/h3>\n