The lithium(Li)metal anode is widely regarded as an ideal anode material for high-energy-density batteries.However,uncontrolled Li dendrite growth often leads to unfavorable interfaces and low Coulombic efficiency(CE)...The lithium(Li)metal anode is widely regarded as an ideal anode material for high-energy-density batteries.However,uncontrolled Li dendrite growth often leads to unfavorable interfaces and low Coulombic efficiency(CE),limiting its broader application.Herein,an ether-based electrolyte(termed FGN-182)is formulated,exhibiting ultra-stable Li metal anodes through the incorporation of LiFSI and LiNO3 as dual salts.The synergistic effect of the dual salts facilitates the formation of a highly robust SEI film with fast Li+transport kinetics.Notably,Li||Cu half cells exhibit an average CE reaching up to 99.56%.In particular,pouch cells equipped with high-loading lithium cobalt oxide(LCO,3 mAh cm^(-2))cathodes,ultrathin Li chips(25μm),and lean electrolytes(5 g Ah-1)demonstrate outstanding cycling performance,retaining 80%capacity after 125 cycles.To address the gas issue in the cathode under high voltage,cathode additives 1,3,6-tricyanohexane is incorporated with FGN-182;the resulting high-voltage LCO||Li(4.4 V)pouch cells can cycle steadily over 93 cycles.This study demonstrates that,even with the use of ether-based electrolytes,it is possible to simultaneously achieve significant improvements in both high Li utilization and electrolyte tolerance to high voltage by exploring appropriate functional additives for both the cathode and anode.展开更多
目的研究茜草科植物红芽大戟Knoxia valerianoidesThorel et P itard的化学成分。方法采用各种色谱技术进行分离纯化,经光谱数据分析鉴定其结构。结果分离得到3个蒽醌类化合物:1,3,5三-羟基-2甲-基-6-甲氧基蒽醌(红大戟素,I),1,3,6三-羟...目的研究茜草科植物红芽大戟Knoxia valerianoidesThorel et P itard的化学成分。方法采用各种色谱技术进行分离纯化,经光谱数据分析鉴定其结构。结果分离得到3个蒽醌类化合物:1,3,5三-羟基-2甲-基-6-甲氧基蒽醌(红大戟素,I),1,3,6三-羟基-5-乙氧甲基蒽醌(II)及1,3二-羟基-2甲-基蒽醌(甲基异茜草素,III)。结论II为新化合物。展开更多
基金supported by the National Key Research and Development Program of China(2022YFB2502103)the Xiamen Science and Technology Project(3502Z20231057)+1 种基金the National Natural Science Foundation of China(Nos.22279107 and 22288102)J.You,R.Wei,and L.Niu acknowledge the China Scholarship Council(CSC)for a doctoral scholarship(Grant Nos.202006310030,202108530138,and 202108530139).
文摘The lithium(Li)metal anode is widely regarded as an ideal anode material for high-energy-density batteries.However,uncontrolled Li dendrite growth often leads to unfavorable interfaces and low Coulombic efficiency(CE),limiting its broader application.Herein,an ether-based electrolyte(termed FGN-182)is formulated,exhibiting ultra-stable Li metal anodes through the incorporation of LiFSI and LiNO3 as dual salts.The synergistic effect of the dual salts facilitates the formation of a highly robust SEI film with fast Li+transport kinetics.Notably,Li||Cu half cells exhibit an average CE reaching up to 99.56%.In particular,pouch cells equipped with high-loading lithium cobalt oxide(LCO,3 mAh cm^(-2))cathodes,ultrathin Li chips(25μm),and lean electrolytes(5 g Ah-1)demonstrate outstanding cycling performance,retaining 80%capacity after 125 cycles.To address the gas issue in the cathode under high voltage,cathode additives 1,3,6-tricyanohexane is incorporated with FGN-182;the resulting high-voltage LCO||Li(4.4 V)pouch cells can cycle steadily over 93 cycles.This study demonstrates that,even with the use of ether-based electrolytes,it is possible to simultaneously achieve significant improvements in both high Li utilization and electrolyte tolerance to high voltage by exploring appropriate functional additives for both the cathode and anode.
文摘目的研究茜草科植物红芽大戟Knoxia valerianoidesThorel et P itard的化学成分。方法采用各种色谱技术进行分离纯化,经光谱数据分析鉴定其结构。结果分离得到3个蒽醌类化合物:1,3,5三-羟基-2甲-基-6-甲氧基蒽醌(红大戟素,I),1,3,6三-羟基-5-乙氧甲基蒽醌(II)及1,3二-羟基-2甲-基蒽醌(甲基异茜草素,III)。结论II为新化合物。
