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Supplying active lithium to single-crystal Li(Ni_(0.90)co.(0.05)Mn_(0.05))_(0.98)Ta_(0.02)O_(2) with Li_(2)MnO_(3) co.ting served as cathode for Li-ion batteries

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Particuology 2024年第12期95卷 303-318页

作者： Li Dong Xiaodong Guan Yang Zhou Shibao Tang Feng Chen School of materials science and Engineering Suzhou University of Science and TechnologySuzhou215009China suzhou Huayi New Energy technology co. Ltd.Suzhou215433China Xingna Energy(suzhou)co. Ltd.Suzhou215000China Chenguang High Performance Fluorine Material Innovation Center in Sichuan University of science and Engineering Zigong643000China

Ni-rich layered oxide with Ni molar co.tent larger than 90%was regarded as an extremely promising candidate for cathode material applied in lithium-ion batteries owing to the significant discharging capacity and low ***,rigorous cycling attenuation resulted from the crystal structure co.lapse and unstable particles interface deeply restrained the co.mercial *** the work,LiNi_(0.90)co.(0.05)Mn_(0.05)O_(2) was modified by Ta5+doping and Li_(2)MnO_(3) co.ering,which was aimed to enhance the structure stability,defend the electrolyte attacking and promote Li+migration during *** material characterization demonstrated the cathodes after Ta5+doping delivered the larger cell lattice parameters and higher cation ordering,which was helpful to improve the rate property and discharge capacity at low *** Li_(2)MnO_(3) layer was tightly adhered on the outside of LiNi_(0.90)co.(0.05)Mn_(0.05)O_(2),which co.ld effectively relieve the electrolyte attacking and sustain the particle morphology *** a result,2 wt%Li_(2)MnO_(3) co.ted Li(Ni_(0.90)co.(0.05)Mn_(0.05))_(0.98)Ta_(0.02)O_(2) exhibited the outstanding discharge capacity of 150.2 mAh g^(−1) at 10.0 large current density and 140.6 mAh g^(−1) at−30℃ as well as the remarkable capacity retention of 93.1%after 300 ***,the pouch full batteries obtained by 2 wt%Li_(2)MnO_(3) co.ted Li(Ni_(0.90)co.(0.05)Mn_(0.05))_(0.98)Ta_(0.02)O_(2) also showed the more stable storage capability,cyclic property in co.parison with bare LiNi_(0.90)co.(0.05)Mn_(0.05)O_(2).

关键词： LiNi_(0.90)co.(0.05)Mn_(0.05)O_(2) Li supplement Li_(2)MnO_(3)co.ting High chemical valence state Ta5+doping Enhanced safety and electrochemical property

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A ROS-Sensitive Diselenide-Crosslinked Polymeric Nanogel for NIR co.trolled Release

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Chinese Journal of Polymer science 2023年第3期41卷 386-393,I0007页

作者： Ji-Chao Hu Qi-Hua Zhang Qiu-Qin Mu Yi-Yuan Tang Zhen Wu Guo-Jie Wang School of materials science and Engineering University of Science and Technology BeijingBeijing 100083China Keiraku Display technology co. LTD.Suzhou 215614China

Here we report a novel polymeric nanogel with stable loading cargo and near-infrared(NIR) co.trolled release *** nanogels are crosslinked by quaternization reactions of bioco.patible poly(β-amino esters) and diselenide-bonded crosslinker(DSe DCl) in *** hydrophobic cavities of the nanogels have the property of stably encapsulating the hydrophobic guest molecules,resulted from the crosslinked network *** to the redox responsiveness of the diselenide bonds on the DSe DCl crosslinker,the nanogels can respond to oxidant H_(2)O_(2) causing the disintegration of the crosslinked network structure,thus the encapsulated guest cargo molecules will be *** is noted that,upon loading the photosensitizer IR780,the nanogels can generate reactive oxygen species(ROS) under NIR irradiation to release the *** advantages of encapsulated cargo stability enhanced by chemical cross-linking and remote stimulation response performance via NIR offer great potential of nanogels for applications of cargo co.trolled release.

关键词： Nanogels NIR responsiveness Diselenide-crosslinked co.trolled release

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Surface-mediated iron on porous co.alt oxide with high energy state for efficient water oxidation electrocatalysis

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Green Energy & Environment 2022年第4期7卷 662-671页

作者： Jingsha Li Tao Hu Changhong Wang Chunxian Guo Institute of materials science and Devices Suzhou University of Science and TechnologySuzhou215011China

Surface engineering of active materials to generate desired energy state is critical to fabricate high-performance heterogeneous ***, its realization in a co.trollable level remains challenging. Using oxygen evolution reaction(OER) as a model reaction, we report a surface-mediated Fe deposition strategy to electronically tailor surface energy states of porous co.(3)O_(4)(Fe-pco.(3)O_(4)) for enhanced activity towards OER. The Fe-pco.(3)O_(4) exhibits a low overpotential of 280 mV to reach an OER current density of 100 mA cm^(-2), and a fast-kinetic behavior with a low Tafel slop of 58.2 mV dec^(-1), outperforming co.(3)O_(4)-based OER catalysts recently reported and also the noble IrO_(2). The engineered material retains 100% of its original activity after operating at an overpotential of 350 m V for 100 h. A co.bination of theoretical calculations and experimental results finds out that the surface doped Fe promotes a high energy state and desired co.rdination environment in the near surface region, which enables optimized OER intermediates binding and favorably changes the rate-determining step.

关键词： Surficial Fe doping co.alt oxides High energy state Water oxidation Oxygen evolution reactions

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Influence of co.e box vents distribution on flow dynamics of co.e shooting process based on experiment and numerical simulation

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China Foundry 2016年第1期13卷 22-29页

作者： Chang-jiang Ni Gao-chun Lu Qing-dong Zhang Tao Jing Jun-jiao Wu Lin-long Yang Qin-fang Wu School of materials science and Engineering Tsinghua University suzhou Mingzhi technology co. Ltd.

co.e shooting process plays a decisive role in the quality of sand co.es, and co.e box vents distribution is one of the most important factor determining the effectiveness of co.e shooting process. In this paper, the influence of co.e box vents distribution on the flow dynamics of co.e shooting process was investigated based on in situ experimental observations with transparent co.e box, high-speed camera and pressure measuring system. Attention was focused on the variation of both the flow behavior of sand and pressure curves due to different vents distribution. Taking both kinetic and frictional stress into acco.nt, a kinetic-frictional co.stitutive model was established to describe the internal momentum transfer in the solid phase. Two-fluid model(TFM) simulation was then performed and good agreement was achieved between the experimental and simulated results on both the flow behavior of sand and the pressure curves. It was found that vents distribution has direct effect on the pressure difference of different locations in the co.e box, which determines the buoyancy force exerting on the sand particles and significantly influences the filling process of co.e sand.

关键词： vents distribution flow dynamics pressure variation co.e shooting process kinetic-frictional model two-fluid model

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Novel 3D porous graphene deco.ated with co.3O_4/CeO_2 for high performance supercapacitor power cell

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Journal of Rare Earths 2017年第10期35卷 995-1001页

作者：曹云岳刘成宝钱君超陈志刚陈丰 Jiangsu Key Laboratory for Environment Functional materials Suzhou University of Science and Technology School of Chemistry Biology and Materials Engineering Suzhou University of Science and technology

Tremendous research efforts have been aimed at ever-increasing worldwide energy demand. For this purpose, the hybrid supercapacitor power cell were prepared co.posing 3D porous graphene deco.ated with co.3O_4-CeO_2 nano-particles herein by using flower stem as biotemplate. The resulting samples were characterized by field emission scanning electron microsco.y（FESEM）, transmission electron microsco.y（TEM）, Raman spectra, X-ray diffraction spectrosco.y（XRD）, nitrogen adsorption and desorption, X-ray photoelectron spectrogram（XPS）, and electrochemical test. The 3D graphene acted as an excellent carrier together with co.3O_4-CeO_2 nano-particles, boosting the specific capacitance of co.posite（221 F/g）, which exceeded the theoretical value limit. This facile biotemplate method of research provided an eco.friendly and cut-price route to obtain high-quality graphene and co.3O_4-CeO_2nano-co.posites owing to the unique porous structure derived from original template（flower stem）. The finding presented a simple strategy for fabrication of novel energy storage devices.

关键词： bio-template co.O4-CeO2 3D graphene supercapacitors rare earths

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Study on the oxidation mechanism of Al-SiC co.posite at elevated temperature

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International Journal of Minerals,Metallurgy and materials 2024年第9期31卷 2077-2087页

作者： Jishuo Han Yong Li Chenhong Ma Qingyao Zheng Xiuhua Zhang Xiaofang Wu School of materials science and Engineering University of Science and Technology BeijingBeijing 100083China Vesuvius Advanced Ceramics(China)co. LtdSuzhou 215000China

Resin-bonded Al-SiC co.posite was sintered at 1100,1300,and 1500℃ in the air,the oxidation mechanism was *** reaction models were also *** oxidation resistance of the Al-SiC co.posite was significantly enhanced with temperature *** in the exterior of the co.posite was partially oxidized slightly,while the transformation of metastable Al_(4)C_(3) to stable Al_(4)SiC_(4) existed in the *** 1100℃,Al in the interior reacted with residual C to form Al_(4)C_(3).With increasing to 1300℃,high temperature and low oxygen partial pressure lead to active oxidation of SiC,and internal gas co.position transforms to Al_(2)O(g)+co.g)+SiO(g)as the reaction *** Al_(4)C_(3) is formed,co.g)and SiO(g)are co.tinuously deposited on its surface,transforming to Al_(4)SiC_(4).At 1500℃,a dense layer co.sisting of SiC and Al_(4)SiC_(4) whiskers is formed which cuts off the diffusion channel of *** active oxidation of SiC is accelerated,enabling more gas to participate in the synthesis of Al_(4)SiC_(4),eventually forming hexagonal lamellar Al_(4)SiC_(4) with mutual accumulation between SiC *** Al enhances the oxidation resistance of *** addition,the in situ generated non-oxide is uniformly dispersed on a micro-scale and bonds SiC stably.

关键词： Al-SiC co.posite kiln furniture Al_(4)SiC_(4) Al_(4)C_(3) oxidation mechanism

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Influence of co.e sand properties on flow dynamics of co.e shooting process based on experiment and multiphase simulation

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China Foundry 2017年第2期14卷 121-127页

作者： Chang-jiang Ni Gao-chun Lu Tao Jing Jun-jiao Wu School of materials science and Engineering Tsinghua University Belting 100084 China suzhou Mingzhi technology co. Ltd. Suzhou 215217 China

The influence of co.e sand properties on flow dynamics was investigated synchronously with various co.e sands, transparent co.e-box and high-speed camera. To co.firm whether the co.e shooting process has significant turbulence, the flow pattern of sand particles in the shooting head and co.e box was reproduced with co.ored co.e sands. By inco.porating the kinetic theory of granular flow(KTGF), kinetic-frictional co.stitutive co.relation and turbulence model, a two-fluid model(TFM) was established to study the flow dynamics of the co.e shooting process. Two-fluid model(TFM) simulations were then performed and a areasonable agreement was achieved between the simulation and experimental results. Based on the experimental and simulation results, the effects of turbulence, sand density, sand diameter and binder ratio were analyzed in terms of filling process, sand volume fraction(αs) and sand velocity(Vs).

关键词： co.e shooting process sand property binder ratio two-fluid model flow dynamic turbulence

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GPU based numerical simulation of co.e shooting process

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China Foundry 2017年第5期14卷 392-397页

作者： Yi-zhong Zhang Gao-chun Lu Chang-jiang Ni Tao Jing Lin-long Yang Qin-fang Wu School of materials science and Engineering Tsinghua University Beijing 100084 China suzhou Mingzhi technology co. Ltd.Suzhou 215217China

co.e shooting process is the most widely used technique to make sand co.es and it plays an important role in the quality of sand co.es. Although numerical simulation can hopefully optimize the co.e shooting process, research on numerical simulation of the co.e shooting process is very limited. Based on a two-fluid model(TFM) and a kinetic-friction co.stitutive co.relation, a program for 3D numerical simulation of the co.e shooting process has been developed and achieved good agreements with in-situ experiments. To match the needs of engineering applications, a graphics processing unit(GPU) has also been used to improve the calculation efficiency. The parallel algorithm based on the co.pute Unified Device Architecture(CUDA) platform can significantly decrease co.puting time by multi-threaded GPU. In this work, the program accelerated by CUDA parallelization method was developed and the accuracy of the calculations was ensured by co.paring with in-situ experimental results photographed by a high-speed camera. The design and optimization of the parallel algorithm were discussed. The simulation result of a sand co.e test-piece indicated the improvement of the calculation efficiency by GPU. The developed program has also been validated by in-situ experiments with a transparent co.e-box, a high-speed camera, and a pressure measuring system. The co.puting time of the parallel program was reduced by nearly 95% while the simulation result was still quite co.sistent with experimental data. The GPU parallelization method can successfully solve the problem of low co.putational efficiency of the 3D sand shooting simulation program, and thus the developed GPU program is appropriate for engineering applications.

关键词： graphics processing unit (GPU) co.pute Unified Device Architecture (CUDA) parallelization co.e shooting process

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Carbon deposition in porous nickel/yttria-stabilized zirco.ia anode under methane atmosphere

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International Journal of Minerals,Metallurgy and materials 2019年第3期26卷 350-359页

作者： Zhi-yuan Chen Li-jun Wang Xiao-jia Du Zai-hong Sun Fu-shen Li Kuo-Chih Chou State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Department of materials science and Engineering Delft University of Technology co.laborative Innovation Center of Steel technology University of Science and Technology Beijing suzhou Huatsing Jingkun New Energy technology co. Ltd. School of materials science and Engineering University of Science and Technology Beijing

A co.mercial solid oxide fuel cell with a Ni/YSZ anode was characterized under a pure methane atmosphere. The amount of deposited carbon increased with an increase in temperature but decreased when the temperature exceeded 700°C. The reactivity of carbon decreased with increasing deposition temperature. Filamentous carbon was deposited from 400 to 600°C, whereas flake carbon was deposited at 700 and 800°C. With increasing temperature, the intensity ratio of the D band over the sum of the G and D bands was co.stant at the beginning and then decreased with the transformation of the carbon morphology. The crystallite size increased from 2.9 to 13 nm with increasing temperature. The results also indicated that the structure of the deposited carbon was better ordered with increasing deposition temperature. In co.parison with pure Ni powders, the interaction between the YSZ substrate and Ni particles co.ld not only modify the carbon deposition kinetics but also reduce the temperature effect on the structure and reactivity variation of carbon.

关键词： solid oxide fuel cell co.ing Raman spectrum hydrocarbon fuel anode

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Review on Metallization Approaches for High-Efficiency Silico. Heterojunction Solar Cells

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Transactions of Tianjin University 2022年第5期28卷 358-373页

作者： Yulian Zeng Chen-Wei Peng Wei Hong Shan Wang Cao Yu Shuai Zou Xiaodong Su School of Physical science and technology Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China suzhou Maxwell Technologies co. Ltd.Suzhou 215200China suzhou Isilver materials co. Ltd.Suzhou 215129China

Crystalline silico.(c-Si)heterojunction(HJT)solar cells are one of the promising technologies for next-generation industrial high-efficiency silico. solar cells,and many efforts in transferring this technology to high-volume manufacturing in the photovoltaic(PV)industry are currently *** is of vital importance to the PV performance and long-term reliability of HJT solar *** this review,we summarize the development status of metallization approaches for highefficiency HJT solar *** co.ventional screen printing technology,to avoid the degradation of the passivation properties of the amorphous silico. layer,a low-temperature-cured(co.tact resistances and high paste *** improve the co.ductivity of electrodes and reduce the metallization co.t,multi-busbar,fine-line printing,and low-temperature-cured silver-co.ted co.per pastes have been *** addition,several potential metallization technologies for HJT solar cells,such as the Smart Wire co.tacting technology,pattern transfer printing,inkjet/FlexTrailprinting,and co.per electroplating,are discussed in detail.B ased on the summary,the potential and challenges of these metallization technologies for HJT solar cells are analyzed.

关键词： Silico. solar cells Passivating-co.tact Heterojunction Metallization Electrode

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