| Abstract Scope |
The ability to recharge in 10 minutes is a great challenge of Li-ion battery, but critical to the wide adoption of electric vehicles. The fundamental limitation is a side reaction, known as Li plating, that happens at the anode when charging the battery at high rate or under low temperature, because this reaction not only causes battery degradation but also increases the risk of internal shorts and safety hazards. Therefore, it is important to understand the mechanism of lithium plating, and what governs this phenomena. The graphite and silicon are the current and next-generation anode materials for Li-ion batteries. In this talk, we will share our findings on revealing the interplay of Li insertion and plating on these two materials, and discuss potential strategies to improve these materials by defect engineering to achieve fast charging. |