【海洋·學術講座】High-specific energy lithium-ion batteries based on silicon anode/lithium-rich cathode

主講人：林展

主辦單位：海洋科學與技術學院

時間：2025年3月11日：上午10:00

地點：H254

主要內容: 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.

本次報告將重點介紹基于硅基負極/富鋰正極的高比能鋰離子電池在應用基礎研究中的關鍵科學問題與產業化難題。

林展，廣東工業大學輕工化工學院特聘教授，國家海外高層級引進人才，“珠江人才計劃”青年拔尖人才。其主要圍繞能量存儲與轉換領域從事材料制備及應用基礎研究，在新型儲能及催化材料領域取得了系列創新性成果，主持/參與了國家及省部級多個項目，擔任國際SCI學術期刊Scientific Reports編委及Nat. Commun.等多個期刊審稿人。代表性成果主要集中于高能量密度下一代鋰離子電池體系（富鋰正極/硅基負極）應用基礎研究，重點揭示富鋰正極長循環中關鍵科學問題并提出合理解決方案；同時，解析了高載量硅基負極在長循環過程中容量失效機制。迄今為止，共發表SCI學術論文~200篇，其中在影響因子IF>10的領域內頂級期刊上發表了100余篇學術論文，申請中國發明專利20余項（授權12項）并出版兩章節中英文著作，研究成果被世界上30多個國家與地區引用~20,000次，H指數為60。2022-2024年度連續三年入選科睿唯安全球“高被引科學家”名單、美國斯坦福大學發布的全球前2%頂尖科學家榜單。