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| 1 | Rare earth and transitional metal colloidal supercapacitors显示文摘The search of electrode materials with high electrochemical activity is one of key solutions to actualize both high energy density and high power density in a supercapacitor. Recently, we have developed one novel kind of rare earth and transitional metal colloidal supercapacitors, which can deliver higher specific capacitance than electrical double-layer capacitors(EDLC) and traditional pseudocapacitors. The electrode materials in colloidal supercapacitors are in-situ formed electroactive colloids, which were transformed from commercial rare earth and transitional metal salts in alkaline electrolyte by chemical and electrochemical assisted coprecipitation. In these colloidal supercapacitors, multiple-electron Faradaic redox reactions can be utilized, which can deliver ultrahigh specific capacitance often larger than one-electron capacitance. Multiple-valence metal cations used in our designed colloidal supercapacitors mainly include Ce3+, Yb3+, Er3+, Fe3+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Sn2+ and Sn4+. The colloidal supercapacitors can be served as the promising next-generation high performance supercapacitors. | CHEN KunFeng XUE DongFeng | 2015 | Science China(Technological Sciences)2015，58，11： | 12 |
| 2 | Multiple Functional Biomass-Derived Activated Carbon Materials for Aqueous Supercapacitors, Lithium-Ion Capacitors and Lithium-Sulfur Batteries显示文摘 | Kunfeng Chen Dongfeng Xue | 2017 | Chinese Journal of Chemistry2017，35，6： | 4 |
| 3 | Active La-Nb-O compounds for fast lithium-ion energy storage显示文摘Searching for novel complex materials with enhanced lithium-ion battery performances is one of the most challenging efforts.Many kinds of transition metal oxides and polyanionic frameworks were developed with various structures,which can improve the energy density of lithium-ion batteries.In this work,we explored 4d and 4f transition metal La-Nb-O compounds as cathode materials for lithium-ion energy storage.Orthorhombic pyrochlore LaNb_(5)O_(14),orthorhombic perovskite LaNb_(3)O_(9),and monoclinic LaNbO_(4) compounds with different metal cation coordination polyhedra were synthesized using solid-state reaction.The orthorhombic pyrochlore LaNb_(5)O_(14) compound showed the highest capacity among these La-Nb-O compounds owing to its quasi‐2D network for Li‐ion incorporation.According to the electronegativity theory and ionic size,La^(3+)cations can form LaO12 polyhedra and hexahedral LaO_(8) units in different La-Nb-O compounds,which can stabilize octahedral NbO_(6) and/or pentahedral NbO_(7) and their assembled structures,resulting in easy lithium-ion diffusion.This work may provide some structure clues for the design of electrode materials for fast lithium storage. | Kunfeng Chen Shu Yin Dongfeng Xue | 2019 | Tungsten2019，1，4： | 3 |
| 4 | Fast growth of cerium-doped lutetium yttrium orthosilicate single crystals and their scintillation properties显示文摘The growth of high-quality and large-size cerium-doped lutetium yttrium orthosilicate(Ce:(LuY)2 SiO5,Ce:LYSO)crystals with lower cost has great influence on their applications in various physical devices.According to the chemical bonding theory of single crystal growth,the fast thermodynamic growth direction of Ce:LYSO is[010]direction.In this work,the maximum pulling rate of 3.5 mm/h is obtained along[010]direction of Ce:LYSO via the Czochralski(Cz)method.Finally,Ce:LYSO bulk single crystals with diameter of 64 mm and length of 220 mm and mass of 4.2 kg are grown.The luminescence performance of low-doped Ce:LYSO for nuclear irradiation(^(22)Na)detector device was studied.Light yield of26193 ph/MeV and decay time of 38 ns are obtained.The present work provides a promising fast growth approach to achieving large size functional bulk crystal via both thermodynamic and kinetic controls. | Kunfeng Chen Dongfeng Xue | 2021 | Journal of Rare Earths2021，39，12： | 2 |
| 5 | Scan matching us- ing line segment relationships for map-based localization of mobile robot显示文摘 | GE KUNFENG CHEN WEIDONG | 2008 | Journal of Harbin Institute of Technol-ogy: English Edition2008，15，6： | 1 |
| 6 | Analysis of photonic crystal and multi-frequency terahertz micros- trip patch antenna显示文摘 | Lechen Yang Xueshun Shi Kunfeng Chen | 2013 | Physica B2013，431，： | 1 |
| 7 | Mid-infrared optical frequency comb in the 2.7-4.0μm range via difference frequency generation from a compact laser system显示文摘We report on the generation of a mid-infrared(mid-IR)frequency comb with a maximum average output power of250 mW and tunability in the 2.7-4.0μm region.The approach is based on a single-stage difference frequency generation(DFG)starting from a compact Yb-doped fiber laser system.The repetition rate of the near-infrared(NIR)comb is locked at 75 MHz.The phase noise of the repetition rate in the offset-free mid-IR comb system is measured and analyzed.Except for the intrinsic of NIR comb,environmental noise at low frequency and quantum noise at high frequency from the amplifier chain and nonlinear spectral broadening are the main noise sources of broadening the linewidth of comb teeth,which limits the precision of mid-IR dual-comb spectroscopy. | Lian Zhou Yang Liu Gehui Xie Chenglin Gu Zejiang Deng Zhiwei Zhu Cheng Ouyang Zhong Zuo Daping Luo Bin Wu Kunfeng Chen Wenxue Li | 2020 | High Power Laser Science and Engineering2020，8，4： | 1 |
| 8 | Enhanced photocatalytic ammonia oxidation activity and nitrogen selectivity over Ag/AgCl/N-TiO_(2) photocatalyst显示文摘The removal of ammonia(NH_(3))emitted from agricultural and industrial activities is of great significance to protect human health and ecological environment.Photocatalytic NH_(3)oxidation to N2under mild conditions is a promising strategy.However,developing visible light photocatalysts for NH_(3)oxidation is still in its infancy.Here,we fabricate N-TiO_(2)and Ag/AgCl/N-TiO_(2)photocatalysts by sol-gel and photodeposition methods,respectively.The introduction of N not only endows TiO_(2)with visible light response(absorption edge at460 nm)but also results in the formation of heterophase junction(anatase and rutile).Thus,N-TiO_(2)shows 2.0 and 1.8 times higher than those over anatase TiO_(2)and commercial TiO_(2)for NH_(3)oxidation under full spectrum irradiation.Meanwhile,surface modification of Ag can simultaneously enhance visible light absorption(generating localized surface plasmon resonance effect)and charge separation efficiency.Therefore,the photocatalytic activity of Ag/AgCl/N-TiO_(2)is further improved.Furthermore,the presence of N and Ag also enhances the selectivity of N2product owing to the change of reaction pathway.This work simultaneously regulates photocatalytic conversion efficiency and product selectivity,providing some guidance for developing highly efficient photocatalysts for NH_(3)elimination. | Jiaojiao Guan Daorong Li Jiahui Feng Peng Xu Zhaonian Li Siqi Ge Hongxia Chen Kunfeng Zhang | 2024 | Journal of Environmental Sciences2024，，4： | 0 |
| 9 | How to fast grow large-size crystals?显示文摘ORIGIN AND COMPLEXITY Large-size crystals are irreplaceable in such fields as semiconductors,communication,the military,and radiation detection.However,it is still very difficult to prepare large-size,high-quality single crystals with a fast-growing rate and low cost.“Howtomake breakthrough in the preparation theory and technology of large-size crystals”is one of the top ten challenges for science and technology released by the China Association for Science and Technology in 2021. | Feng Liu Kunfeng Chen Dongfeng Xue | 2023 | The Innovation2023，4，4： | 0 |
| 10 | Microstructural characterization of cobalt treated by laser surface melting under different powers显示文摘The effect of laser power outputs on microstructural evolution of cobalt(Co) treated by laser surface melting(LSM) are systematically characterized by electron channeling contrast and electron backscatter diffraction techniques equipped in scanning electron microscope. Results shows three distinctly different microstructural characteristics from surface to substrate in Co samples treated by LSM: solidification substructure(cell and cellular-dendritic) and phase transformation structure(ε martensitic plates) in the elongated columnar grains for melting zone(MZ), ε martensitic plates in insufficient recrystallization grains for heat affected zone(HAZ),and fully recrystallization microstructure for base metal(BM). Although the similarity of general evolution profiles for LSM treatment on Co under different laser power outputs, the trend of the penetration and width depth for MZ is obviously increased with increase of laser power outputs, and cellular substructure is more pronounced in the specimens treated by the higher power. The metallurgical mechanisms for LSM treatment of Co, which are closely related to the interaction between heat sources and metal, are systematically discussed in this paper. | Jian Tu Kunfeng Zhou Zhiming Zhou Can Huang Zhigang Chen | 2019 | Progress in Natural Science:Materials International2019，29，1： | 0 |
| 11 | Enhanced photocatalytic performance of Bi_(4)O_(5)Br_(2)with threedimensionally ordered macroporous structure for phenol removal显示文摘Herein,a series of three-dimensionally ordered macroporous(3DOM)Bi_(4)O_(5)Br_(2)photocatalysts with different macropore sizes were successfully fabricated via a polymethyl methacrylate(PMMA)template method.The photocatalytic activity for phenol degradation over 3DOM Bi_(4)O_(5)Br_(2)first increased and then decreased with the rise in macropore size.Specifically,3DOM Bi_(4)O_(5)Br_(2)-255(macropore diameter ca.170 nm)exhibits the best photocatalytic activity in the static system,which is about 4.5,7.3,and 11.9 times higher than those of bulk Bi_(4)O_(5)Br_(2),Bi_(2)WO_(6),and g-C_(3)N_(4),respectively.Meanwhile,high phenol conversion(75%)is also obtained over 3DOM Bi_(4)O_(5)Br_(2)-255 in the flow system under full spectrum irradiation.Furthermore,3DOM Bi_(4)O_(5)Br_(2)-255 also shows strong mineralization capacity owing to the downward shift of valance band position(0.15 V)as compared with Bi_(4)O_(5)Br_(2).Total organic carbon(TOC)removal rate over 3DOM Bi_(4)O_(5)Br_(2)-255(62%)is much higher than that of Bi_(4)O_(5)Br_(2)(17%).The enhancement in photocatalytic performance of 3DOM Bi_(4)O_(5)Br_(2)-255 is attributable to its better phenol adsorption,O_(2)activation,and charge separation and transfer abilities.This work combines the advantages of 3D structure and surface dangling bonds,providing new possibilities for designing highly efficient photocatalysts for pollutants removal. | Kunfeng Zhang Hongxia Chen Wenbo Pei Hongxing Dai Junshan Li Yongfa Zhu | 2023 | Nano Research2023，16，7： | 0 |
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