【海洋·學(xué)術(shù)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(xué)與技術(shù)學(xué)院

時(shí)間：2025年3月11日：上午10:00

地點(diǎn)：H254

主要內(nèi)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(bào)告將重點(diǎn)介紹基于硅基負(fù)極/富鋰正極的高比能鋰離子電池在應(yīng)用基礎(chǔ)研究中的關(guān)鍵科學(xué)問題與產(chǎn)業(yè)化難題。

林展，廣東工業(yè)大學(xué)輕工化工學(xué)院特聘教授，國(guó)家海外高層級(jí)引進(jìn)人才，“珠江人才計(jì)劃”青年拔尖人才。其主要圍繞能量存儲(chǔ)與轉(zhuǎn)換領(lǐng)域從事材料制備及應(yīng)用基礎(chǔ)研究，在新型儲(chǔ)能及催化材料領(lǐng)域取得了系列創(chuàng)新性成果，主持/參與了國(guó)家及省部級(jí)多個(gè)項(xiàng)目，擔(dān)任國(guó)際SCI學(xué)術(shù)期刊Scientific Reports編委及Nat. Commun.等多個(gè)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(fù)極）應(yīng)用基礎(chǔ)研究，重點(diǎn)揭示富鋰正極長(zhǎng)循環(huán)中關(guān)鍵科學(xué)問題并提出合理解決方案；同時(shí)，解析了高載量硅基負(fù)極在長(zhǎng)循環(huán)過程中容量失效機(jī)制。迄今為止，共發(fā)表SCI學(xué)術(shù)論文~200篇，其中在影響因子IF>10的領(lǐng)域內(nèi)頂級(jí)期刊上發(fā)表了100余篇學(xué)術(shù)論文，申請(qǐng)中國(guó)發(fā)明專利20余項(xiàng)（授權(quán)12項(xiàng)）并出版兩章節(jié)中英文著作，研究成果被世界上30多個(gè)國(guó)家與地區(qū)引用~20,000次，H指數(shù)為60。2022-2024年度連續(xù)三年入選科睿唯安全球“高被引科學(xué)家”名單、美國(guó)斯坦福大學(xué)發(fā)布的全球前2%頂尖科學(xué)家榜單。