Jahn-Teller distortion(JTD)remains a fundamental bottleneck for transition metal oxides(TMOs)in electrochemical energy storage,where the e_(g)-orbital single-electron occupancy induces irreversible octahedral collapse...Jahn-Teller distortion(JTD)remains a fundamental bottleneck for transition metal oxides(TMOs)in electrochemical energy storage,where the e_(g)-orbital single-electron occupancy induces irreversible octahedral collapse and rapid capacity fading.Here,we pioneer an itinerant-electron-mediated dynamic suppression strategy that fundamentally reshapes the JTD evolution pathway throughπ-d orbital hybridization engineering.By constructing reduced graphene oxide/TMO heterointerfaces(rGO/MO_(x),M=Fe/Ni/Mn),localized 3d electrons are transformed into delocalized itinerant states,which(1)eliminate e_(g)-band degeneracy via orbital repopulation and(2)establish an electron density buffer layer to neutralize lattice strain.This electronic regulation enables ultrafast Na^(+)diffusion kinetics(508.3 F g^(−1)at 1 A g^(−1)→304.6 F g^(−1)at 20 A g^(−1))and near-zero lattice deformation(91.07%capacitance retention after 20,000 cycles).Synchrotron-based X-ray absorption spectroscopy and density functional theory calculations reveal that itinerant electron dynamics actively decouple the Mn^(3+)d^(4)electronic configuration from JTD triggering,leading to a dramatic suppression of octahedral distortion compared to the conventional MnO_(2).The proposed electron delocalization-to-lattice stabilization paradigm opens a universal route to design distortion-resistant electrodes for high-power energy storage systems.展开更多
Water retention techniques have attracted much attention because of its important role in improving the edible quality and increasing the yield of meat products.At present,water retention techniques mainly involve fol...Water retention techniques have attracted much attention because of its important role in improving the edible quality and increasing the yield of meat products.At present,water retention techniques mainly involve following aspects:raw materials and their treatment,such as water retention treatment before pig slaughtering and animal welfare water retention,processing techniques,such as vacuum rolling,pH adjustment,optimization of cooking methods,high pressure and ultrasound,and addition of water retention substances,such as water-retaining agents,natural water-retaining substances,and biological enzymes.In this paper,the research progress on the possible effects of various water retention techniques on the characteristics of meat products was reviewed.展开更多
基金Financial support from the National Natural Science Foundation of China(grant no.U20A20154,22279005,22379006,21575016)the National Program for Support of Top-notch Young Professionals is gratefully acknowledgedtechnical support from the Xi’an Advanced Computing Center
文摘Jahn-Teller distortion(JTD)remains a fundamental bottleneck for transition metal oxides(TMOs)in electrochemical energy storage,where the e_(g)-orbital single-electron occupancy induces irreversible octahedral collapse and rapid capacity fading.Here,we pioneer an itinerant-electron-mediated dynamic suppression strategy that fundamentally reshapes the JTD evolution pathway throughπ-d orbital hybridization engineering.By constructing reduced graphene oxide/TMO heterointerfaces(rGO/MO_(x),M=Fe/Ni/Mn),localized 3d electrons are transformed into delocalized itinerant states,which(1)eliminate e_(g)-band degeneracy via orbital repopulation and(2)establish an electron density buffer layer to neutralize lattice strain.This electronic regulation enables ultrafast Na^(+)diffusion kinetics(508.3 F g^(−1)at 1 A g^(−1)→304.6 F g^(−1)at 20 A g^(−1))and near-zero lattice deformation(91.07%capacitance retention after 20,000 cycles).Synchrotron-based X-ray absorption spectroscopy and density functional theory calculations reveal that itinerant electron dynamics actively decouple the Mn^(3+)d^(4)electronic configuration from JTD triggering,leading to a dramatic suppression of octahedral distortion compared to the conventional MnO_(2).The proposed electron delocalization-to-lattice stabilization paradigm opens a universal route to design distortion-resistant electrodes for high-power energy storage systems.
基金Supported by Earmarked Fund for China Agriculture Research System(CARS-43)Scientific and Technological Achievement Transfer and Transformation Project of Sichuan Province(2023ZHCG0079)Research and Application of Key Techniques for Industrialization of Frozen Prepared Meat Dishes.
文摘Water retention techniques have attracted much attention because of its important role in improving the edible quality and increasing the yield of meat products.At present,water retention techniques mainly involve following aspects:raw materials and their treatment,such as water retention treatment before pig slaughtering and animal welfare water retention,processing techniques,such as vacuum rolling,pH adjustment,optimization of cooking methods,high pressure and ultrasound,and addition of water retention substances,such as water-retaining agents,natural water-retaining substances,and biological enzymes.In this paper,the research progress on the possible effects of various water retention techniques on the characteristics of meat products was reviewed.
