Challenges facing high-voltage/high-capacity cathodes,in addition to the longstanding problems pertinent to lithium(Li)-metal anodes,should be addressed to develop high-energy-density Li-metal batteries.This issue mos...Challenges facing high-voltage/high-capacity cathodes,in addition to the longstanding problems pertinent to lithium(Li)-metal anodes,should be addressed to develop high-energy-density Li-metal batteries.This issue mostly stems from interfacial instability between electrodes and electrolytes.Conventional carbonate-or ether-based liquid electrolytes suffer from not only volatility and flammability but also limited electrochemical stability window.Here,we report a nitrile electrolyte strategy based on concentrated nitrile electrolytes(CNEs)with co-additives.The CNE consists of high-concentration lithium bis(fluorosulfonyl)imide(LiFSI)in a solvent mixture of succinonitrile(SN)/acetonitrile(AN).The SN/AN solvent mixture is designed to ensure high oxidation stability along with thermal stability,which are prerequisites for high-voltage Li-metal cells.The CNE exhibits interfacial stability with Li metals due to the coordinated solvation structure.Lithium nitrate(LiNO_(3))and indium fluoride(InF_(3))are incorporated in the CNE as synergistic co-additives to further stabilize solid-electrolyte interphase(SEI)on Li metals.The resulting electrolyte(CNE+LiNO_(3)/InF_(3))enables stable cycling performance in Li||LiNi_(0.8)Co_(0.1)Mn_(0.1)and 4.9 V-class Li||LiNi_(0.5)Mn_(1.5)O_(4)cells.Notably,the Li||LiNi_(0.5)Mn_(1.5)O_(4)cell maintains its electrochemical activity at high temperature(100℃)and even in flame without fire or explosion.展开更多
Quasi-solid-state electrolytes,which integrate the safety characteristics of inorganic materials,the flexibility of polymers,and the high ionic conductivity of liquid electrolytes,represent a transitional solution for...Quasi-solid-state electrolytes,which integrate the safety characteristics of inorganic materials,the flexibility of polymers,and the high ionic conductivity of liquid electrolytes,represent a transitional solution for high-energy-density lithium batteries.However,the mechanisms by which inorganic fillers enhance multiphase interfacial conduction remain inadequately understood.In this work,we synthesized composite quasi-solid-state electrolytes with high inorganic content to investigate interfacial phenomena and achieve enhanced electrode interface stability.Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)particles,through surface anion anchoring,improve Li^(+)transference numbers and facilitate partial dissociation of solvated Li^(+)structures,resulting in superior ion transport kinetics that achieve an ionic conductivity of 0.51 mS cm^(−1)at room temperature.The high mass fraction of inorganic components additionally promotes the formation of more stable interfacial layers,enabling lithium-symmetric cells to operate without short-circuiting for 6000 h at 0.1 mA cm^(−2).Furthermore,this system demonstrates exceptional stability in 5 V-class lithium metal full cells,maintaining 80.5%capacity retention over 200 cycles at 0.5C.These findings guide the role of inorganic interfaces in composite electrolytes and demonstrate their potential for advancing high-voltage lithium battery technology.展开更多
目的:比较通用粘接剂Single Bond Universal在不同酸蚀模式下应用于V类洞修复充填体边缘的微渗漏程度。方法:选取60颗离体前磨牙,于釉牙骨质界处预备V类洞缺损,随机分为6组,每组10颗牙,分别采用全酸蚀+通用粘接剂、选择性酸蚀+通用粘接...目的:比较通用粘接剂Single Bond Universal在不同酸蚀模式下应用于V类洞修复充填体边缘的微渗漏程度。方法:选取60颗离体前磨牙,于釉牙骨质界处预备V类洞缺损,随机分为6组,每组10颗牙,分别采用全酸蚀+通用粘接剂、选择性酸蚀+通用粘接剂、无酸蚀+通用粘接剂、全酸蚀+全酸蚀粘接剂(Single Bond2)、选择性酸蚀+自酸蚀粘接剂(Clearfil SE Bond)和无酸蚀+自酸蚀粘接剂处理,均用FilteK Z350XT树脂充填。经冷热循环和亚甲蓝溶液染色后,从颊舌方向平行于牙体长轴正中将充填体纵向剖开,体视显微镜下观察边缘微渗漏程度。结果:所有试件龈壁微渗漏程度均高于牙合壁(P<0.05)。6组龈壁和牙合壁微渗漏程度比较,差异均无统计学意义(P>0.05)。结论:V类洞树脂充填修复时,应用通用粘接剂采用选择性酸蚀模式可获得良好的边缘封闭效果。展开更多
目的研究预酸蚀对不同粘接剂修复Ⅴ类洞微渗漏的影响。方法取因正畸治疗拔除的正常前磨牙40颗,在颊侧釉牙骨质界冠方1mm处制备V类洞,并在釉质边缘制备宽0.5mm的45°短斜面,将样本随机分为4组,A组(磷酸预处理后用通用型粘接剂Single ...目的研究预酸蚀对不同粘接剂修复Ⅴ类洞微渗漏的影响。方法取因正畸治疗拔除的正常前磨牙40颗,在颊侧釉牙骨质界冠方1mm处制备V类洞,并在釉质边缘制备宽0.5mm的45°短斜面,将样本随机分为4组,A组(磷酸预处理后用通用型粘接剂Single Bond Universal)、B组(磷酸预处理后用自酸蚀粘接剂Adper?Easy one)、C组(自酸蚀Single Bond Universal)、D组(自酸蚀Adper?Easy one),使用Filtek Z350树脂充填后进行冷热循环处理,使用2%亚甲蓝溶液染色24小时,体视显微镜下观察充填体边缘的染色情况。结果壁的微渗漏情况方面,A组与C组、B组与D组比较差异具有显著性(P<0.05),A组与B组、C组与D组比较差异无显著性(P>0.05)。四组间龈壁微渗漏值比较差异无显著性(P>0.05)。结论 Single Bond Universal通用型粘接剂和Adper?Easy one自酸蚀粘接剂在树脂充填后均会产生微渗漏,但是经预酸蚀处理后有助于减少充填后的微渗漏值。展开更多
基金supported by the U.S.Army Research Office(ARO)(W911NF-18-1-0016)supported by the Basic Science Research Program(2021R1A2B5B03001615,2021M3H4A1A02099355)through the National Research Foundation of Korea(NRF)funded by the Ministry of Science,ICT and Future Planning,the Technology Innovation Program(20010960,20012216)funded by the Ministry of Trade,Industry&Energy(MOTIE)the R&D program for Forest Science Technology(FTIS 2021354D10-2123-AC03)provided by Korea Forest Service(Korea Forestry Promotion Institute).
文摘Challenges facing high-voltage/high-capacity cathodes,in addition to the longstanding problems pertinent to lithium(Li)-metal anodes,should be addressed to develop high-energy-density Li-metal batteries.This issue mostly stems from interfacial instability between electrodes and electrolytes.Conventional carbonate-or ether-based liquid electrolytes suffer from not only volatility and flammability but also limited electrochemical stability window.Here,we report a nitrile electrolyte strategy based on concentrated nitrile electrolytes(CNEs)with co-additives.The CNE consists of high-concentration lithium bis(fluorosulfonyl)imide(LiFSI)in a solvent mixture of succinonitrile(SN)/acetonitrile(AN).The SN/AN solvent mixture is designed to ensure high oxidation stability along with thermal stability,which are prerequisites for high-voltage Li-metal cells.The CNE exhibits interfacial stability with Li metals due to the coordinated solvation structure.Lithium nitrate(LiNO_(3))and indium fluoride(InF_(3))are incorporated in the CNE as synergistic co-additives to further stabilize solid-electrolyte interphase(SEI)on Li metals.The resulting electrolyte(CNE+LiNO_(3)/InF_(3))enables stable cycling performance in Li||LiNi_(0.8)Co_(0.1)Mn_(0.1)and 4.9 V-class Li||LiNi_(0.5)Mn_(1.5)O_(4)cells.Notably,the Li||LiNi_(0.5)Mn_(1.5)O_(4)cell maintains its electrochemical activity at high temperature(100℃)and even in flame without fire or explosion.
基金supported by the Science and Technology Commission of Shanghai Municipality(No.2024ZDSYS2),China.
文摘Quasi-solid-state electrolytes,which integrate the safety characteristics of inorganic materials,the flexibility of polymers,and the high ionic conductivity of liquid electrolytes,represent a transitional solution for high-energy-density lithium batteries.However,the mechanisms by which inorganic fillers enhance multiphase interfacial conduction remain inadequately understood.In this work,we synthesized composite quasi-solid-state electrolytes with high inorganic content to investigate interfacial phenomena and achieve enhanced electrode interface stability.Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)particles,through surface anion anchoring,improve Li^(+)transference numbers and facilitate partial dissociation of solvated Li^(+)structures,resulting in superior ion transport kinetics that achieve an ionic conductivity of 0.51 mS cm^(−1)at room temperature.The high mass fraction of inorganic components additionally promotes the formation of more stable interfacial layers,enabling lithium-symmetric cells to operate without short-circuiting for 6000 h at 0.1 mA cm^(−2).Furthermore,this system demonstrates exceptional stability in 5 V-class lithium metal full cells,maintaining 80.5%capacity retention over 200 cycles at 0.5C.These findings guide the role of inorganic interfaces in composite electrolytes and demonstrate their potential for advancing high-voltage lithium battery technology.
文摘目的:比较通用粘接剂Single Bond Universal在不同酸蚀模式下应用于V类洞修复充填体边缘的微渗漏程度。方法:选取60颗离体前磨牙,于釉牙骨质界处预备V类洞缺损,随机分为6组,每组10颗牙,分别采用全酸蚀+通用粘接剂、选择性酸蚀+通用粘接剂、无酸蚀+通用粘接剂、全酸蚀+全酸蚀粘接剂(Single Bond2)、选择性酸蚀+自酸蚀粘接剂(Clearfil SE Bond)和无酸蚀+自酸蚀粘接剂处理,均用FilteK Z350XT树脂充填。经冷热循环和亚甲蓝溶液染色后,从颊舌方向平行于牙体长轴正中将充填体纵向剖开,体视显微镜下观察边缘微渗漏程度。结果:所有试件龈壁微渗漏程度均高于牙合壁(P<0.05)。6组龈壁和牙合壁微渗漏程度比较,差异均无统计学意义(P>0.05)。结论:V类洞树脂充填修复时,应用通用粘接剂采用选择性酸蚀模式可获得良好的边缘封闭效果。
文摘目的研究预酸蚀对不同粘接剂修复Ⅴ类洞微渗漏的影响。方法取因正畸治疗拔除的正常前磨牙40颗,在颊侧釉牙骨质界冠方1mm处制备V类洞,并在釉质边缘制备宽0.5mm的45°短斜面,将样本随机分为4组,A组(磷酸预处理后用通用型粘接剂Single Bond Universal)、B组(磷酸预处理后用自酸蚀粘接剂Adper?Easy one)、C组(自酸蚀Single Bond Universal)、D组(自酸蚀Adper?Easy one),使用Filtek Z350树脂充填后进行冷热循环处理,使用2%亚甲蓝溶液染色24小时,体视显微镜下观察充填体边缘的染色情况。结果壁的微渗漏情况方面,A组与C组、B组与D组比较差异具有显著性(P<0.05),A组与B组、C组与D组比较差异无显著性(P>0.05)。四组间龈壁微渗漏值比较差异无显著性(P>0.05)。结论 Single Bond Universal通用型粘接剂和Adper?Easy one自酸蚀粘接剂在树脂充填后均会产生微渗漏,但是经预酸蚀处理后有助于减少充填后的微渗漏值。
