【海洋·学术讲座】High-specific energy lithium-ion batteries based on silicon anode/lithium-rich cathode

主讲人：林展

主办单位：海洋科学与技术学院

时间：2025年3月11日：上午10:00

地点：H254

主要内容: High specific energy density (~350 Wh/kg) and good safety have always been the goals pursued by the lithium-ion battery community, which is also the key to the further popularization of electric vehicles. In the anode system, silicon, as an ideal anode material for lithium-ion batteries, has a theoretical capacity of 10 times than that of graphite (4200 vs. 372 mAh/g), which can effectively meet the high specific energy density of power batteries. However, due to the volume change of up to 300% during cycling, the electrode structure is severely damaged, resulting in a decrease in battery stability. In the cathode system, the high specific energy layered lithium-rich manganese-based cathode material has a very high theoretical specific capacity (>250 mAh/g), which can also effectively meet the demand for high specific energy density of power batteries. However, voltage decay and capacity attenuation have been the biggest challenges for their commercialization. Current research suggests that the attenuations are caused by the release of oxygen at high voltages and the corrosion of electrolytes. This report will focus on the improvement of the cycling performance of silicon-based anode by high-performance binders and the important role of the double modification strategy for the performance of lithium-rich manganese-based cathode, which will lead to possible commercilization of lithium-ion batteries with high specific energy density in the near future.

本次报告将重点介绍基于硅基负极/富锂正极的高比能锂离子电池在应用基础研究中的关键科学问题与产业化难题。

林展，广东工业大学轻工化工学院特聘教授，国家海外高层级引进人才，“珠江人才计划”青年拔尖人才。其主要围绕能量存储与转换领域从事材料制备及应用基础研究，在新型储能及催化材料领域取得了系列创新性成果，主持/参与了国家及省部级多个项目，担任国际SCI学术期刊Scientific Reports编委及Nat. Commun.等多个期刊审稿人。代表性成果主要集中于高能量密度下一代锂离子电池体系（富锂正极/硅基负极）应用基础研究，重点揭示富锂正极长循环中关键科学问题并提出合理解决方案；同时，解析了高载量硅基负极在长循环过程中容量失效机制。迄今为止，共发表SCI学术论文~200篇，其中在影响因子IF>10的领域内顶级期刊上发表了100余篇学术论文，申请中国发明专利20余项（授权12项）并出版两章节中英文著作，研究成果被世界上30多个国家与地区引用~20,000次，H指数为60。2022-2024年度连续三年入选科睿唯安全球“高被引科学家”名单、美国斯坦福大学发布的全球前2%顶尖科学家榜单。