Structural characterisation of Silicon anode swelling during Lithium ion battery cycling

锂离子电池循环过程中硅阳极膨胀的结构表征

• 批准号: 10039776
• 金额: $ 0.96万
• 依托单位: TALGA ANODE UK LIMITED
• 依托单位国家: 英国
• 项目类别: Collaborative R&D
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=10039776
• 关键词: Structural; characterisation; Silicon; anode; swelling

The range of an electric vehicle is ultimately determined by the energy density of the battery. From the perspective of anode material development, energy density is a function of the ability to store lithium. Silicon has a much larger capacity (3600 mAh/g) compared to conventional graphite (360 mAh g),however, Si-based anodes currently fall short in industrial acceptance due to severe volume expansion (as high as 300%) during Li-ion insertion and extraction causing sudden capacity drop.Changes in the structural state of Silicon anodes such as changes in silicon size are important in understanding the long-term effects of these advanced anode materials on battery cell performance. Therefore, Talga aims to use the A4I program to work with National Physical Laboratory (NPL) scientists and their state-of-the-art facilities to gain a deeper understanding of the structural changes that occur in silicon anode-based batteries and use the information in gaining wider acceptance and commercialisation of it's product.

电动汽车的续航里程最终取决于电池的能量密度。从负极材料发展的角度来看，能量密度是储存锂的能力的函数。硅的容量要大得多（3600 mAh/g）与传统石墨相比（360 mAh g），然而，由于体积急剧膨胀，硅基阳极目前未达到工业接受程度硅阳极结构状态的变化，如硅尺寸的变化，对于理解长寿命硅阳极的结构和性能具有重要意义。这些先进的阳极材料对电池性能的长期影响。因此，Talga的目标是利用A4 I计划与国家物理实验室（NPL）的科学家及其最先进的设施合作，以更深入地了解硅阳极电池中发生的结构变化，并利用这些信息获得更广泛的接受和产品的商业化。