阳极
硅
材料科学
锂(药物)
兴奋剂
氧化镍
镍
离子
氧化物
化学工程
无机化学
光电子学
化学
冶金
电极
有机化学
内科学
物理化学
工程类
医学
作者
Dongxu Ouyang,Kuo Wang,Tianfeng Gao,Zhirong Wang
标识
DOI:10.1016/j.jlp.2022.104924
摘要
Considering the prospect of lithium-ion cells with graphite + SiO x anode and the fact that there is rare literature concerning the safety features of graphite + SiO x based cells, this work performed an experimental investigation on the safety characteristics of Li(Ni 0.8 Mn 0.1 Co 0.1 )O 2 /(graphite+10%SiO x ) cells with different states of charge (50% SOC, 75% SOC and 100% SOC). Besides that, the impact of two well-known electrolyte additive components, i.e. 2% vinylene carbonate+1% ethylene sulfate (2VC1DTD) and 2% fluoroethylene carbonate+1% lithium difluorophosphate (2FEC1LFO) on the safety characteristics of cells was also revealed. The safety characteristics of Li(Ni 0.8 Mn 0.1 Co 0.1 )O 2 /(graphite+10%SiO x ) cells seem to be worse than Li(Ni 0.8 Mn 0.1 Co 0.1 )O 2 /graphite cells with the same capacity, the former illustrates larger the maximum temperature rise rate in accelerating rate calorimetry (ARC) tests (16,651 vs. ∼6000 °C/min). Similar to the other types of lithium-ion cells, the safety features of the cells with graphite + SiO x anode enhance with the decrease of cell SOC in typical safety tests. 2VC1DTD and 2FEC1LFO are unable to effectively improve the safety performance of cells under abusive conditions, which might result from the fact that the electrolytes addicted with 2VC1DTD and 2FEC1LFO are flammable as well, and 2VC1DTD and 2FEC1LFO cannot restrain the reactivity between anode materials and electrolytes. • The safety features of graphite+10%SiO x cells are poorer than graphite cells. • The safety features of graphite+10%SiO x cells enhance with the decrease of cell SOC. • 2VC1DTD and 2FEC1LFO cannot significantly improve the safety performance of cells.
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