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| 1 | Design and simulation of an innovative cylinder fabricated by selective laser melting显示文摘Additive Manufacturing(AM) processing has attracted wide attention due to its advantages, e.g., rapid prototyping and free design. In aeronautic and astronautic engineering, it is especially attractive to apply AM processing, especially Selective Laser Melting(SLM), into primary structures that always occupy most of the whole mass of aircraft or spacecraft. In this paper, an innovative lattice sandwich structure that is suitable to be manufactured with SLM is adopted to design the typical cylinder under axial compression. Firstly, the mechanical properties of pyramidal lattice are investigated, and the bearing capacity of the lattice sandwich cylinder is given analytically for each failure mode. Secondly, a composite cylinder is re-designed in the form of lattice sandwich structure, which sizes are ultimately obtained through optimization. Finally, finite element model of the innovative cylinder is established and several kinds of imperfection are introduced to simulate the defects caused by SLM. Numerical result shows that the lattice sandwich design can obviously enhance the bearing capacity of cylindrical shell even though the original one is designed with composite material. In other words, SLM has great potential in improving the primary structure of spacecraft in the future. | Guang MENG Bin JI Han HAN Chengzhang GU Renbang LIN Fujun PENG | 2019 | Chinese Journal of Aeronautics2019，32，1： | 7 |
| 2 | Recent Progress and Perspectives of Sodium Metal Anodes for Rechargeable Batteries显示文摘Sodium metal anodes have attracted significant attention due to their high specific capacity,low redox potential and abundant resources.However,the dendrites and unstable solid electrolyte interphase(SEI)of sodium anodes restrict the development of sodium metal batteries.This review includes the recent progress on the Na anode protection in sodium metal batteries.The strategies are summarized as modified three-dimensional current collectors,artificial solid electrolyte interphases,and electrolyte modifications.Conclusions and perspectives are envisaged for the further understanding and development of Na metal anodes. | FANG Hengyi GAO Suning ZHU Zhuo REN Meng WU Quan LI Haixia LI Fujun | 2021 | Chemical Research in Chinese Universities2021，37，2： | 3 |
| 3 | Trace determination of nine haloacetic acids in drinking water by liquid chromatography–electrospray tandem mass spectrometry显示文摘 | Liping Meng Shimin Wu Fujun Ma Ai Jia Jianying Hu | 2010 | Journal of Chromatography A2010，，29： | 1 |
| 4 | Trace determination of nine haloacetic acids in drinking water by liquid chromatography–electrospray tandem mass spectrometry显示文摘 | Liping Meng Shimin Wu Fujun Ma Ai Jia Jianying Hu | 2010 | Journal of Chromatography A2010，，29： | 1 |
| 5 | Optimization of Waste Gate Drive Circuit of Two-Stage Turbocharging System显示文摘A two stage turbocharging control system was proposed,in which the pressure regulator valve with a close-loop pressure adjusting function instead of a high speed on-off solenoid valve,is used as a driving mechanism of waste gate.A digital-analog(DA)conversion circuit based on pulse width modulation(PWM)generates one analog voltage signal required by the pressure regulating valve control.The principle of the DA conversion circuit was analyzed,meanwhile,the performance of the conversion circuit was improved by adopting a speed-up capacitor,which helps to increase the stability and responsiveness of the control voltage generated by the conversion circuit;the structure parameters of the circuit was optimized by simulation.After the optimization,the ripple wave of circuit output voltage was kept within16mV under the 12bit conversion accuracy,the conversion time of the circuit could be reduced to 4ms.The engine bench test show that the turbocharging boost pressure control system which adopted the circuit had a rather good stable control accuracy(the steady state within 0.8%)and dynamic response(the regulation time is less than 4s). | Fujun Zhang Jiahang Chang Tao Cui Meng Xia | 2017 | Journal of Beijing Institute of Technology2017，26，3： | 0 |
| 6 | Metallogenic Prediction of the Peripheral Areas of the Xiyi Concealed Lead-Zinc Deposit in Baoshan City, Yunnan Province显示文摘The newly-discovered Xiyi lead-zinc deposit is a large deposit located in the north central Baoshan block of the southern Sanjiang metallogenic belt section,Southwest China.The surface of the deposit is mainly covered | WU Wenxian DING Jun WANG Yonghua MENG Fujun ASKAR DENG Ke | 2015 | Acta Geologica Sinica(English Edition)2015，89，5： | 0 |
| 7 | Interfacial Chemistry Enables Highly Reversible Na Extraction/Intercalation in Layered-Oxide Cathode Materials显示文摘Comprehensive Summary Layered transition-metal oxides are promising cathode candidates for sodium-ion batteries.However,the inferior interphase formation and particulate fracture during sodiation/desodiation result in structure degradation and poor stability.Herein,the interface chemistry of P2-Na_(0.640)Ni_(0.343)Mn_(0.657)O_(2)in an electrolyte of 1.0 mol/L NaPF6 in diglyme is unveiled to enable highly reversible Na extraction and intercalation.The uniform and robust cathode-electrolyte interphase layer is in situ formed with decomposition of diglyme molecules and anions in initial cycles.The NaF-and CO-rich CEI film exhibits high mechanical strength and ionic conductivity,which suppresses the reconstruction of its electrode interphase from P2 phase to spinel-like structure and reinforces its structure integrity without cracks.This favours facile Na+transport and stable bulk redox reactions.It is demonstrated to show long cycling stability with capacity retention of 94.4%for 180 cycles and superior rate capability.This investigation highlights the cathode interphase chemistry in sodium-ion batteries. | Chenchen Wang Kuan Wang Meng Ren Yaohui Huang Kai Zhang Changzhong Liao Kaimin Shih Pengfei Yan Fujun Li | 2023 | Chinese Journal of Chemistry2023，41，15： | 0 |
| 8 | Ultralow-strain Ti substituted Mn-vacancy layered oxides with enhanced stability for sodium-ion batteries显示文摘Anionic redox reaction(ARR) in layered manganese-based oxide cathodes has been considered as an effective strategy to improve the energy density of sodium-ion batteries.Mn-vacancy layered oxides deliver a high ARR-related capacity with small voltage hysteresis,however,they are limited by rapid capacity degradation and poor rate capability,which arise from inferior structure changes due to repeated redox of lattice oxygen.Herein,redox-inactive Ti^(4+)is introduced to substitute partial Mn^(4+)to form Na_(2) Ti_(0.5)Mn_(2.5)O_7(Na_(4/7)[□_(1/7)Ti_(1/7)Mn_(5/7)]O_(2),□ for Mn vacancies),which can effectively restrain unfavorable interlayer gliding of Na2 Mn307 at high charge voltages,as reflected by an ultralow-strain volume variation of 0.11%.There is no irreversible O_(2) evolution observed in Na_(2) Ti_(0.5)Mn_(2.5)O_7 upon charging,which stabilizes the lattice oxygen and ensures the overall structural stability.It exhibits increased capacity retention of 79.1% after 60 cycles in Na_(2) Ti_(0.5)Mn_(2.5)O_7(17.1% in Na_(2) Mn_(3) O_7) and good rate capability(92.1 mAh g^(-1) at 0.5 A g^(-1)).This investigation provides new insights into designing high-performance cathode materials with reversible ARR and structural stability for SIBs. | Yanchen Liu Chenchen Wang Meng Ren Hengyi Fang Zhuoliang Jiang Fujun Li | 2021 | Journal of Energy Chemistry2021，30，12： | 0 |
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