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| 1 | Microstructure and composition engineering Yb single-filled CoSb_(3) for high thermoelectric and mechanical performances显示文摘A broad tunability of the thermoelectric and mechanical properties of CoSb_(3) has been demonstrated by adjusting the composition with the addition of an increasing number of elements.However,such a strategy may negatively impact processing repeatability and composition control.In this work,singleelement-filled skutterudite is engineered to have high thermoelectric and mechanical performances.Increased Yb filling fraction is found to increase phonon scattering,whereas cryogenic grinding contributes additional microstructural scattering.A peak zT of 1.55 and an average zT of about 1.09,which is comparable to the reported results of multiple-filled SKDs,are realized by the combination of simple composition and microstructure engineering.Furthermore,the mechanical properties of Yb single-filled CoSb_(3) skutterudite are improved by manipulation of the microstructure through cryogenic grinding.These findings highlight the realistic prospect of producing high-performance thermoelectric materials with reduced compositional complexity. | Zhenxing Zhou Matthias T.Agne Qihao Zhang Shun Wan Qingfeng Song Qing Xu Xiaofang Lu Shijia Gu Yuchi Fan Wan Jiang Gerald Jeffrey Snyder Lianjun Wang | 2019 | Journal of Materiomics2019，5，4： | 4 |
| 2 | Enhanced thermoelectric properties of hydrothermally synthesized n-type Se&Lu-codoped Bi2Te3显示文摘N-type Se&Lu-codoped Bi2Te3 nanopowders were prepared by hydrothermal method and sintered by spark plasma sintering technology to form dense samples.By further doping Se element into Lu-doped Bi2Te3 samples,the thickness of the nanosheets has the tendency to become thinner.The electrical conductivity of Lu0.1Bi1.9Te3−xSex material is reduced with the increasing Se content due to the reduced carrier concentration,while the Seeback coefficient values are enhanced.The lattice thermal conductivity of the Lu0.1Bi1.9Te3−xSex is greatly reduced due to the introduced point defects and atomic mass fluctuation.Finally,the Lu0.1Bi1.9Te2.7Se0.3 sample obtained a maximum ZT value of 0.85 at 420 K.This study provides a low-cost and simple low-temperature method to mass production of Se&Lu-codoped Bi2Te3 with high thermoelectric performance for practical applications. | Xiaolei Shi Xin Ai Qihao Zhang Xiaofang Lu Shijia Gu Li Su Lianjun Wang Wan Jiang | 2020 | Journal of Advanced Ceramics2020，9，4： | 2 |
| 3 | Enhanced TE properties of Cu@Ag/Bi2Te3 nanocomposites by decoupling electrical and thermal properties显示文摘Cu@Ag/Bi2Te3 nanocomposites were prepared for the first time by ultrasonic dispersion-rapid freezedrying method combined with spark plasma sintering(SPS).By changing the content of Cu@Ag nanoparticle,we could modulate the temperature dependent thermoelectric properties.The highest ZT value can be obtained at 450 K for 1 vol%Cu@Ag/Bi2Te3,which is benefited from the decoupling of electrical and thermal properties.With the increase of electrical conductivity,the absolute value of Seebeck coefficient lifts while the thermal conductivity declines.Meanwhile,the average ZT value between 300 K and 475 K was 0.61 for 1 vol%Cu@Ag/Bi2Te3,which is much higher than that of pristine Bi2 Te3.Therefore,the decoupling effect of Cu@Ag nanoparticles incorporation could be a promising method to broaden the application of Bi2Te3 based thermoelectric materials. | Xiaofang Lu Qi Zheng Shijia Gu Rui Guo Li Su Jiancheng Wang Zhenxing Zhou Yuchi Fan Wan Jiang Lianjun Wang | 2020 | Chinese Chemical Letters2020，31，3： | 1 |
| 4 | Extracellular magnetic labeling of biomimetic hydrogel-induced human mesenchymal stem cell spheroids with ferumoxytol for MRI tracking显示文摘Labeling of mesenchymal stem cells(MSCs)with superparamagnetic iron oxide nanoparticles(SPIONs)has emerged as a potential method for magnetic resonance imaging(MRI)tracking of transplanted cells in tissue repair studies and clinical trials.Labeling of MSCs using clinically approved SPIONs(ferumoxytol)requires the use of transfection reagents or magnetic field,which largely limits their clinical application.To overcome this obstacle,we established a novel and highly effective method for magnetic labeling of MSC spheroids using ferumoxytol.Unlike conventional methods,ferumoxytol labeling was done in the formation of a mechanically tunable biomimetic hydrogel-induced MSC spheroids.Moreover,the labeled MSC spheroids exhibited strong MRI T2 signals and good biosafety.Strikingly,the encapsulated ferumoxytol was localized in the extracellular matrix(ECM)of the spheroids instead of the cytoplasm,minimizing the cytotoxicity of ferumoxytol and maintaining the viability and stemness properties of biomimetic hydrogel-induced MSC spheroids.This demonstrates the potential of this method for post-transplantation MRI tracking in the clinic. | Sen Yan Ke Hu Miao Zhang Jingyi Sheng Xueqin Xu Shijia Tang Yan Li Sheng Yang Guangxiang Si Yu Mao Yi Zhang Feimin Zhang Ning Gu | 2023 | Bioactive Materials2023，，1： | 0 |
| 5 | A topological polymer network with Cu(Ⅱ)-coordinated reversible imidazole-urea locked unit constructs an ultra-strong self-healing elastomer显示文摘It is exceedingly desired, but difficult to construct self-healing materials with both excellent mechanical properties and healing efficiency, which are usually realized by using mutually exclusive methods. Here, we reconcile this contradiction by utilizing copper-bis-(imidazole-2-yl)-methane-urea(Cu-BIMU) locked units based on novel designed dynamic imidazole-urea bonds with coupled multiple noncovalent bonds(coordination bonds, π-π stacking bonds, and hydrogen bonds). The coordination of Cu(II) greatly reduces the electron-cloud density of imidazole, which lowers the free energy barrier of imidazole-urea bonds and promotes their reversible dissociation, as demonstrated by the density functional theory and small-molecule model reaction. The topological design of Cu-BIMU polyurethane(Cu-BIMU-PU), which concentrates multiple crosslinking-in-one locked unit to avoid the formation of excessive crosslinking sites to ensure high chain mobility, facilitates self-healing. Accumulative extensive intermolecular interactions endowed excellent mechanical properties to the resulting Cu-BIMU-PU elastomer with a tensile strength of 65.3 MPa, among the highest ever-reported value. This work provides a novel molecular design principle for fabricating high-performance dynamic polymers. | Lei Yang Zenghe Liu Rasoul Esmaeely Neisiany Jiaming Lou Yifan Guo Luzhi Zhang Huijie Liu Shuo Chen Shijia Gu Zhengwei You | 2023 | Science China Chemistry2023，66，3： | 0 |
| 6 | Preparation of a Bulk Glass by Spark Plasma Sintering Using Microporous Material显示文摘ZSM-5 molecular sieve is a kind of high silicon microporous crystalline material that possesses three-dimensional frameworks.It has two kinds of ten member ring channels including a set of straight channels and a set of sine channels.These two sets of channels are perpendicular and the orifices are oval.Silica glasses are widely used in optical instru- | Shijia Gu Lianjun Wang Wan Jiang Wei Luo | 2016 | 功能材料信息2016，13，1： | 0 |
| 7 | Enhanced thermoelectric performance of hydrothermally synthesized polycrystalline Te-doped SnSe显示文摘In this study,large-scale Te-doped polycrystalline SnSe nanopowders were synthesized by a facile hydrothermal approach and the effect of Te doping on the thermoelectric properties of SnSe was fully investigated.It is found that the carrier concentration increases due to the reduction of band gap by alloying with Te,which contributes to significant enhancement of electrical conductivity especially at room temperature.Combined with the moderated Seebeck coefficient,a high power factor of 4.59μW cm 1 K 2 is obtained at 773 K.Furthermore,the lattice the rmal conductivity is greatly reduced upon Te substitution owing to the atomic point defect scattering.Benefiting from the synergistically optimized both electrical-and thermal-transport properties by Te-doping,thermoelectric performance of polycrystalline SnSe is enhanced in the whole temperature range with a maximum ZT of-0.79 at a relatively low temperature(773 K) for SnSe0.85Te0.15.This study provides a low-cost and simple lowtemperature method to mass production of SnSe with high thermoelectric performance for practical applications. | Pei Li Xin Ai Qihao Zhang Shijia Gu Lianjun Wang Wan Jiang | 2021 | Chinese Chemical Letters2021，32，2： | 0 |
| 8 | Solvent-Free Synthesis of Self-Healable and Recyclable Crosslinked Polyurethane Based on Dynamic Oxime-Urethane Bonds显示文摘Polyurethane is widely used for its versatility in design and range of performance.Self-healing and recyclable dynamic polyurethane networks have attracted extensive attention due to their potential to extend service life and ensure safety in use,as well as to promote sustainable use of resources.Developing green and environment-friendly methods to obtain this material is an interesting and challenging task,as the majority of current dynamic polyurethane networks utilize the solution polymerization method.The use of solvents makes the processes complicated,harmful to environment,and increase the cost.Poly(oxime-urethanes)(POUs)are emerging dynamic polyurethanes and show great potential in diverse fields,such as biomaterials,hot melt adhesives,and flexible electronics.In this study,we utilized the solubility properties of dimethylglyoxime in raw material poly(ethylene glycol)to prepare POUs through bulk polymerization for the first time.This method is simple,convenient and cost-efficient.Simultaneously,copper ion coordination improves POUs strength and dynamic properties,with mechanical strength up from 0.54 MPa to 1.03 MPa and self-healing recovery rate up from 85.5%to 91.8%,and activation energy down from 119.6 k J/mol to 95.4 k J/mol.To demonstrate the application of this technology,self-healing and stretchable circuits are constructed from this dynamic polyurethane network. | Yuepeng Wang Lei Yang Luzhi Zhang Hongfei Huang Bo Qian Shijia Gu Zhengwei You | 2023 | Chinese Journal of Polymer Science2023，41，11： | 0 |
| 9 | Sintering and mechanical properties of carbon bulks from ordered mesoporous carbon and nano diamond显示文摘Powder metallurgy is important in material preparation.Due to the inertness of carbon materials,however,sintering powdered carbon into physically coherent bulks has been a great challenge even at a high temperature(2000).Improving the sintering activity of carbon powders is℃the key to the success of the consolidation of the carbon powders.Here ordered mesoporous carbon(OMC)is used as the starting material to produce highly homogeneous novel carbon bulks.During sintering at 1800,the huge specific surface area of the OMC greatly promotes the migration of℃carbon atoms and thus the sintering of the OMC by surface diffusion mechanism.When nanodiamond(ND)is added,the volume expansion associated with the phase transformation of diamond to graphite facilitates the densification of the powder compacts.The strong connection between the OMC and the graphite onions derived from the ND bestows the as-prepared carbon bulks with excellent mechanical properties.The current research pioneers a novel way to prepare high-strength carbon materials at relatively low temperatures. | Bowen MIAO Junzhuo WANG Jianlin LI Shijia GU Lianjun WANG Wan JIANG | 2022 | Journal of Advanced Ceramics2022，11，11： | 0 |
| 10 | In-situ growth of carbon nanotubes on ZnO to enhance thermoelectric and mechanical properties显示文摘As a high-temperature thermoelectric(TE)material,ZnO offers advantages of non-toxicity,chemical stability,and oxidation resistance,and shows considerable promise as a true ready-to-use module under air conditions.However,poor electrical conductivity and high thermal conductivity severely hinder its application.Carbon nanotubes(CNTs)are often used as a reinforcing phase in composites,but it is difficult to achieve uniform dispersion of CNTs due to van der Waals forces.Herein,we developed an effective in-situ growth strategy of homogeneous CNTs on ZnO nanoparticles by exploiting the chemical vapor deposition(CVD)technology,in order to improve their electrical conductivity and mechanical properties,as well as reducing the thermal conductivity.Meanwhile,magnetic nickel(Ni)nanoparticles are introduced as catalysts for promoting the formation of CNTs,which can also enhance the electrical and thermal transportation of ZnO matrices.Notably,the electrical conductivity of ZnO is significantly boosted from 26 to 79 S·cm^(−1) due to the formation of dense and uniform conductive CNT networks.The lattice thermal conductivity(κ_(L))is obviously declined by the intensification of phonon scattering,resulting from the abundant grain boundaries and interfaces in ZnO-CNT composites.Importantly,the maximum dimensionless figure of merit(zT)of 0.04 at 800 K is obtained in 2.0%Ni-CNTs/ZnO,which is three times larger than that of CNTs/ZnO prepared by traditional ultrasonic method.In addition,the mechanical properties of composites including Vickers hardness(HV)and fracture toughness(K_(IC))are also reinforced.This work provides a valuable reference for dispersing nano-phases in TE materials to enhance both TE and mechanical properties. | Shengjie FAN Tingting SUN Meng JIANG Shijia GU Lianjun WANG Haixue YAN Wan JIANG | 2022 | Journal of Advanced Ceramics2022，11，12： | 0 |
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