シリコン系負極活物質とは？

There is a growing focus on research into silicon-based anode materials within the industry. Silicon is a material that can absorb up to 10 times more lithium ions during the charge/discharge process compared to a conventional anode, such as graphite. As a result, it is expected that silicon will be a commercialized material for many years to come.

Among the silicon-based anode materials, the silicon-carbon composite (Si/C) anode is one of the most promising approaches. It is anticipated that Si/C anodes will outperform other silicon-based materials, such as SiO, in terms of both capacity enhancement and capacity retention. This is driving research and development efforts.

However, because silicon undergoes considerable volume changes during charge and discharge cycles, the Si/C anode material tends to deteriorate over repeated cycles—a challenge that has long persisted.