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| 1 | Effect of Sc and Zr additions on microstructures and corrosion behavior of Al-Cu-Mg-Sc-Zr alloys显示文摘The effects of adding the alloy element Sc to Al alloys on strengthening, recrystallization and modification of the grain microstructure have been investigated. The combination of Sc and Zr alloying not only produces a remarkable synergistic effect of inhibition of recrystallization and refinement of grain size but also substantially reduce the amount of high-cost additional Sc. In this work, the microstructures and corrosion behavior of a new type of Al-Cu-Mg-Sc-Zr alloy with Sc/Zr ratio of 1/2 were investigated.The experimental results showed that the Sc and Zr additions to Al-Cu-Mg alloy could strongly inhibit recrystallization, refine grain size, impede the segregation of Cu element along the grain boundary and increase the spacing of grain boundary precipitates. In addition, adding Sc and Zr to Al-Cu-Mg alloy effectively restricts the corrosion mechanism conversion associated with Al2 Cu Mg particles, which resulted in the change of the cross-section morphology of inter-granular corrosion from an undercutting to an elliptical shape. The susceptibility to inter-granular corrosion was significantly decreased with increasing Sc and Zr additions to the Al-Cu-Mg alloy. The relationships between microstructures evolution and inter-granular corrosion mechanism of Al-Cu-Mg-Sc-Zr alloys were also discussed. | Fangfang Sun Guiru Liu Nash Qunying Li Enzuo Liu Chunnain He Chunsheng Shi Naiqin Zhao | 2017 | Journal of Materials Science & Technology2017，33，9： | 10 |
| 2 | A bottom-up strategy toward metal nano-particles modified graphene nanoplates for fabricating aluminum matrix composites and interface study显示文摘To synthesize graphene economically and efficiently,as well as to improve the interface bonding between graphene and metal and to recede the aggregation issue of graphene,in this work,an easy and scalable bottom-up strategy for the mass production of metal nanoparticles modified graphene nanoplates(GNPs)was proposed.Cu nanoparticles modified GNPs(Cu-GNPs)and Ni nanoparticles modified GNPs(Ni-GNPs)were fabricated through this method,and then compounded with Al via ball milling technique.The asobtained Ni-GNPs/Al composite showed simultaneously improved strength and toughness compared with unreinforced Al,while the Cu-GNPs/Al composite presented a greater strengthening effect.The microstructure and interface of the two composites were carefully characterized and investigated to reveal the difference.First principle study was also adopted to explore the binding energy of different interface structures.This study could provide new insights into the fabrication of GNPs and the control of interface in GNPs/Al composites. | Tielong Han Enzuo Liu Jiajun Li Naiqin Zhao Chunnian He | 2020 | Journal of Materials Science & Technology2020，42，11： | 8 |
| 3 | Azobenzene/graphene hybrid for high-density solar thermal storage by optimizing molecular structure显示文摘A large capacity storing solar energy as latent heat in a close-cycle is essentially important for solar thermal fuels. This paper presents a solar thermal molecule model of a photo-isomerizable azobenzene(Azo) molecule covalently bound to graphene. The storage capacity of the Azo depending on isomerization enthalpy(ΔH) is calculated based on density functional theory. The result indicates that the ΔH of Azo molecules on the graphene can be tuned by electronic interaction, steric hindrance and molecular hydrogen bonds(H-bonds). Azo with the withdrawing group on the ortho-position of the free benzene shows a relatively high ΔH due to resonance effect. Moreover, the H-bonds on the trans-isomer largely increase ΔH because they stabilize the trans-isomer at a low energy. 2-hydroxy-4-carboxyl-2′,6′,-dimethylamino-Azo/graphene shows the maximum ΔH up to 1.871 e V(107.14 Wh kg^(-1)), which is 125.4% higher than Azo without functional groups. The Azo/graphene model can be used for developing high-density solar thermal storage materials by controlling molecular interaction. | LI Man FENG YiYu LIU EnZuo QIN ChengQun FENG Wei | 2016 | Science China(Technological Sciences)2016，59，9： | 6 |
| 4 | Effect of Ni,Fe and Fe-Ni alloy catalysts on the synthesis of metal contained carbon nano-onions and studies of their electrochemical hydrogen storage properties显示文摘Three types of carbon nano-onions(CNOs) including Ni@CNOs.Fe_3C@CNOs and Fe_(0.64)Ni_(0.36)@CNOs nanoparticles have been synthesized by catalytic decomposition of methane at 850 ℃ using nickel,iron and iron-nickel alloy catalysts.Comparative and systematic studies have been carried out on the morphology,structural characteristics and graphitic crystallinity of these CNOs products.Furthermore,the electrochemical hydrogen storage properties of three types of CNOs have been investigated.Measurements show that the Ni@CNOs have the highest discharge capacity of 387.2 mAh/g,coiTesponding to a hydrogen storage of 1.42%.This comparison study shows the advantages of each catalyst in the growth of CNOs.enabling the controllable synthesis and tuning the properties of CNOs by mediating different metals and their alloy for using in the fuel cell system. | Chenguang Zhang Jiajun Li Chunsheng Shi Chunnian He Enzuo Liu Naiqin Zhao | 2014 | Journal of Energy Chemistry2014，23，3： | 5 |
| 5 | In situ synthesis ofultrathin 2-D TiO2 with high energy facets on graphene oxide for enhancing photocatalytic activity显示文摘 | Sha Junwei Zhao Naiqin Liu Enzuo | 2014 | Carbon2014，68，： | 1 |
| 6 | Self-anchored catalysts for substrate-free synthesis of metal-encapsulated carbon nano-onions and study of their magnetic properties显示文摘我们表明包含阶段分离为碳 nanostructures 的没有底层的合成产生的 Fe-Ni 合金 nanosheet 的新奇自我抛锚的催化剂结构的合成。快 Fourier 变换分析被执行以便在减小和化学蒸汽免职(CVD ) 期间调查阶段和合金 nanosheet 的结构的进化生长。-Fe-Ni (Fe 0.64 Ni 0.36) 和 -Fe-Ni (铁镍合金) 分阶段执行在 NiFe 2 O 4 nanosheet 催化剂先锋在 H 2 减小期间,在一个 -Fe-Ni 矩阵上形成 selfanchored 单音分散 -Fe-Ni nanocrystals。Fe-Ni 合金 nanosheet 为种包含金属的碳 nano 洋葱(CNO ) 催化剂用作,并且作为对抛锚的支持这些 preformed nanoparticles,没有为 CVD 生长的另外的底层的要求的让步的单音分散催化剂 nanoparticles。这合成能够减轻结合并且 Ostwald 没有另外的底层的帮助,成熟。这结构允许尽管有聚集的制服大小的 CNO 的生长,弄碎,并且合金表叠。这研究在大规模向碳 nanostructures 的没有底层的合成由阶段分离为新奇催化剂结构提供一个有希望的图案。最后,铁磁性的 Fe 0.64 Ni 0.36@CNOs 粒子在磁性的存储和水纯化演示他们的应用程序,,无毒的水处理材料。 | Chenguang Zhang Jiajun Li Chunsheng Shi Chunnian He Enzuo Liu Naiqin Zhao | 2016 | Nano Research2016，9，4： | 1 |
| 7 | Synthesis of hollow carbon nano-onions and their use for electrochemical hydrogen storage显示文摘 | Chenguang Zhang Jiajun Li Enzuo Liu Chunnian He Chunsheng Shi Xiwen Du Robert H. Hauge Naiqin Zhao | 2012 | Carbon2012，，10： | 1 |
| 8 | Effect of amorphous FePOcoating on structure and electrochemical performance显示文摘 | Wang Zhiyuan Liu Enzuo He Chunnian | 2013 | Journal of Power Sources2013，236，： | 1 |
| 9 | Effect of amorphous FePO4coating on structure and electrochemical per- formanee 显示文摘 | Zhiyuan Wang Enzuo Liu Chunnian He | 2013 | Journal of Power Sources2013，236，： | 1 |
| 10 | Preparation of reduced graphene oxide/Fe 3 O 4 nanocomposite and its microwave electromagnetic properties显示文摘 | Erlong Ma Jiajun Li Naiqin Zhao Enzuo Liu Chunnian He Chunsheng Shi | 2013 | Materials Letters2013，，： | 1 |
| 11 | Enhanced eletro- chemical hydrogen storage capacity of multi-walled carbon nanotubes by TiO2 decoration显示文摘 | Liu Enzuo Wang Jian Li Jiajun | 2011 | Int J Hydrogen Energy2011，36，： | 1 |
| 12 | Exfoliated multi-layered graphene anode with the broadened delithiation voltage plateau below 0.5 V显示文摘The commercial graphite(CG)is the conventional anode material for lithium ion batteries(LIBs)due to its low delithiation voltage plateau(below 0.5 V)and extraordinary durability.Nevertheless,the further promotion of energy density of LIBs is restricted by the limited capacity below 0.5 V of CG.Here,based on the supercritical CO2 exfoliation technique,the production of multi-layered graphene(MLG)is achieved from the pilot scale production line.The great merit of the exfoliated MLG anode is that the voltage plateau below 0.5 V is broadened obviously as compared to those of natural graphite and CG.Additionally,no obvious lithium dendrites are observed for MLG during the lithiation process.The large delithiation capacity under the low voltage plateau of MLG is mainly benefited from the combination of Li intercalation and boundary storage mechanism,which is further confirmed by the density functional theory calculations.The LiFePO4/MLG full cell can afford the satisfactory electrochemical property with respect to the capacity,energy density and ultralong cycling stability(90%capacity retention after 500 cycles at 2 C),significantly better than that of LiFePO4/CG.Besides,this developed technique not only dedicates to producing the high-performance anode for LIBs but also opens a door for the mass production of MLG in the industrial scale. | Xinlong Ma Xinyu Song Yushu Tang Enzuo Liu Chenggen Xu Chuanlei Qi Yun Li Jinsen Gao Yongfeng Li | 2020 | Journal of Energy Chemistry2020，29，10： | 0 |
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