Poly(ethylene oxide)(PEO)based electrolytes have garnered considerable attention in all-solid-state lithium metal batteries with superior safety and energy density,but suffer fromlow-ion conductivity and poor cycling ...Poly(ethylene oxide)(PEO)based electrolytes have garnered considerable attention in all-solid-state lithium metal batteries with superior safety and energy density,but suffer fromlow-ion conductivity and poor cycling stability.Herein,a novel in-situ functional crosslinking strategy is proposed to overcome these limitations simultaneously,where a two-in-one bis-diazirine molecule(C1)is not only used as a rigid cross-linker,but also functions as an electron-withdrawing inducer.Benefitting from such an integration of two functionalities into one cross-linker,a rigid PEO electrolyte network can be facilely constructed,while exhibiting disrupted crystallization,robust mechanical strength,loosened Li-O binding to boost the Li+transport,and anion-rich Li+coordinated structure to favor the generation of a stable LiF-rich solid electrolyte interface.As a result,a remarkable ion conductivity of 1.4×10^(−3) S cm^(−1) is achieved at 60◦C together with a Li+transference number of 0.63.And the corresponding LiFePO4||Li and NCM811||Li filled batteries present significantly improved rate performance and capacity retention cycling life compared with the pristine PEO electrolyte,highlighting the great potential of in-situ functional crosslinking for high performance all-solid-state batteries.展开更多
Ultralong organic room-temperature phosphorescence(RTP)materials have attracted tremendous attention recently due to their diverse applications.Several ultralong organic RTP materials mimicking the host-vip architec...Ultralong organic room-temperature phosphorescence(RTP)materials have attracted tremendous attention recently due to their diverse applications.Several ultralong organic RTP materials mimicking the host-vip architecture of inorganic systems have been exploited successfully.However,complicated synthesis and high expenditure are still inevitable in these studies.Herein,we develop a series of novel host-vip organic phosphorescence systems,in which all luminophores are electron-rich,commercially available and halogen-atom-free.The maximum phosphorescence efficiency and the longest lifetime could reach 23.6%and 362 ms,respectively.Experimental results and theoretical calculation indicate that the host molecules not only play a vital role in providing a rigid environment to suppress non-radiative decay of the vip,but also show a synergistic effect to the vip through Förster resonance energy transfer(FRET).The commercial availability,facile preparation and unique properties also make these new host-vip materials an excellent candidate for the anti-counterfeiting application.This work will inspire researchers to develop new RTP systems with different wavelengths from commercially available luminophores.展开更多
Unnatural reaction in the living cells is a powerful tool for biological research. However, the polymerization inside cells is rarely reported. In this work, a lab-in-cell is illustrated based on our developed spontan...Unnatural reaction in the living cells is a powerful tool for biological research. However, the polymerization inside cells is rarely reported. In this work, a lab-in-cell is illustrated based on our developed spontaneous amino-yne click polymerization. Carbonyl group activated terminal diyne can spontaneously polymerize with tetraphenylethene(TPE)-containing primary diamine inside cells, and polymer with weight-average molecular weight of 7,300 was yielded. By utilizing this in vivo amino-yne click polymerization and taking advantage of the aggregation-induced emission feature of TPE, a "turn-on" cell imaging was realized,and in-situ killing of cells was also acquired by destroying the structures of actin and tubulin, which cannot be realized by preprepared polymer. This strategy provides a useful platform and holds great promise in biochemistry and therapy applications.展开更多
基金supported by National Natural Science Foundation of China(No.52273198)Yunnan Fundamental Research Projects(No.202301BF070001-008)+2 种基金Graduate Research Program of Yunnan University(No.KC23235310)National Key Research and Development Program of China(Nos.2022YFB3803300 and 2023YFE0116800)Beijing Natural Science Foundation(IS23037).
文摘Poly(ethylene oxide)(PEO)based electrolytes have garnered considerable attention in all-solid-state lithium metal batteries with superior safety and energy density,but suffer fromlow-ion conductivity and poor cycling stability.Herein,a novel in-situ functional crosslinking strategy is proposed to overcome these limitations simultaneously,where a two-in-one bis-diazirine molecule(C1)is not only used as a rigid cross-linker,but also functions as an electron-withdrawing inducer.Benefitting from such an integration of two functionalities into one cross-linker,a rigid PEO electrolyte network can be facilely constructed,while exhibiting disrupted crystallization,robust mechanical strength,loosened Li-O binding to boost the Li+transport,and anion-rich Li+coordinated structure to favor the generation of a stable LiF-rich solid electrolyte interface.As a result,a remarkable ion conductivity of 1.4×10^(−3) S cm^(−1) is achieved at 60◦C together with a Li+transference number of 0.63.And the corresponding LiFePO4||Li and NCM811||Li filled batteries present significantly improved rate performance and capacity retention cycling life compared with the pristine PEO electrolyte,highlighting the great potential of in-situ functional crosslinking for high performance all-solid-state batteries.
基金This work was supported by the National Natural Science Foundation of China(21788102 and 21525417)the Natural Science Foundation of Guangdong Province(2019B030301003 and 2016A030312002)the Innovation and Technology Commission of Hong Kong(ITC-CNERC14S01).
文摘Ultralong organic room-temperature phosphorescence(RTP)materials have attracted tremendous attention recently due to their diverse applications.Several ultralong organic RTP materials mimicking the host-vip architecture of inorganic systems have been exploited successfully.However,complicated synthesis and high expenditure are still inevitable in these studies.Herein,we develop a series of novel host-vip organic phosphorescence systems,in which all luminophores are electron-rich,commercially available and halogen-atom-free.The maximum phosphorescence efficiency and the longest lifetime could reach 23.6%and 362 ms,respectively.Experimental results and theoretical calculation indicate that the host molecules not only play a vital role in providing a rigid environment to suppress non-radiative decay of the vip,but also show a synergistic effect to the vip through Förster resonance energy transfer(FRET).The commercial availability,facile preparation and unique properties also make these new host-vip materials an excellent candidate for the anti-counterfeiting application.This work will inspire researchers to develop new RTP systems with different wavelengths from commercially available luminophores.
基金supported by the National Natural Science Foundation of China(21788102,21525417,21490571)the National Program for Support of Top-Notch Young Professionals,the Natural Science Foundation of Guangdong Province(2016A030312002,2018A030313763,2019B030301003)+1 种基金the Fundamental Research Funds for the Central Universities(2015ZY013)the Innovation and Technology Commission of Hong Kong(ITC-CNERC14S01)
文摘Unnatural reaction in the living cells is a powerful tool for biological research. However, the polymerization inside cells is rarely reported. In this work, a lab-in-cell is illustrated based on our developed spontaneous amino-yne click polymerization. Carbonyl group activated terminal diyne can spontaneously polymerize with tetraphenylethene(TPE)-containing primary diamine inside cells, and polymer with weight-average molecular weight of 7,300 was yielded. By utilizing this in vivo amino-yne click polymerization and taking advantage of the aggregation-induced emission feature of TPE, a "turn-on" cell imaging was realized,and in-situ killing of cells was also acquired by destroying the structures of actin and tubulin, which cannot be realized by preprepared polymer. This strategy provides a useful platform and holds great promise in biochemistry and therapy applications.
