|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Synthesis of Porous NiO Nanocrystals with Controllable Surface Area and Their Application as Supercapacitor Electrodes显示文摘We report a facile way to grow various porous NiO nanostructures including nanoslices,nanoplates,and nanocolumns,which show a structure-dependence in their specific charge capacitances.The formation of controllable porosity is due to the dehydration and re-crystallization of β-Ni(OH)_(2) nanoplates synthesized by a hydrothermal process.Thermogravimetric analysis shows that the decomposition temperature of the β-Ni(OH)_(2) nanostructures is related to their morphology.In electrochemical tests,the porous NiO nanostructures show stable cycling performance with retention of specific capacitance over 1000 cycles.Interestingly,the formation of nanocolumns by the stacking of β-Ni(OH)_(2) nanoslices/plates favors the creation of small pores in the NiO nanocrystals obtained after annealing,and the surface area is over five times larger than that of NiO nanoslices and nanoplates.Consequently,the specific capacitance of the porous NiO nanocolumns(390 F/g)is significantly higher than that of the nanoslices(176 F/g)or nanoplates(285 F/g)at a discharge current of 5 A/g.This approach provides a clear illustration of the process-structure-property relationship in nanocrystal synthesis and potentially offers strategies to enhance the performance of supercapacitor electrodes. | Xiaojun Zhang Wenhui Shi Jixin Zhu Weiyun Zhao Jan Ma Subodh Mhaisalkar Tuti Lim Maria Yanhui Yang Hua Zhang Huey Hoon Hng Qingyu Yan | 2010 | Nano Research2010，3，9： | 24 |
| 2 | Combustion characteristic and aging behavior of bimetal thermite powders显示文摘Nanothermites have been employed as fuel additives in energetic formulations due to their higher energy density over CHNO energetics. Nevertheless, sintering and degradation of nanoparticles significantly limit the practical use of nanothermites. In this work, combustion characteristic and aging behavior of aluminum/iron oxide(Al/Fe2O3) nanothermite mixtures were investigated in the presence of micron-scale nickel aimed to produce bimetal thermite powders. The results showed that the alumina content in the combustion residue increased from 88.3% for Al/Fe2O3 nanothermite to 96.5% for the nanothermite mixture containing 20 wt% nickel. Finer particle sizes of combustion residue were obtained for the nanothermite mixtures containing nickel, indicative of the reduced agglomeration. Both results suggested a more complete combustion in the bimetal thermite powders. Aging behavior of the nanothermite mixture was also assessed by measuring the heat of combustion of the mixture before and after aging process. The reduction in heat of combustion of nanothermite mixtures containing nickel was less severe as compared to a significant decrease for the nanothermite mixture without nickel, indicating better aging resistance of the bimetal thermite powders. | Hong-qi Nie Hay Yee Chan Sreekumar Pisharath Huey Hoon Hng | 2021 | Defence Technology(防务技术)2021，17，3： | 5 |
| 3 | Accurate machine learning models based on small dataset of energetic materials through spatial matrix featurization methods显示文摘A large database is desired for machine learning(ML) technology to make accurate predictions of materials physicochemical properties based on their molecular structure.When a large database is not available,the development of proper featurization method based on physicochemical nature of target proprieties can improve the predictive power of ML models with a smaller database.In this work,we show that two new featurization methods,volume occupation spatial matrix and heat contribution spatial matrix,can improve the accuracy in predicting energetic materials' crystal density(ρ_(crystal)) and solid phase enthalpy of formation(H_(f,solid)) using a database containing 451 energetic molecules.Their mean absolute errors are reduced from 0.048 g/cm~3 and 24.67 kcal/mol to 0.035 g/cm~3 and 9.66 kcal/mol,respectively.By leave-one-out-cross-validation,the newly developed ML models can be used to determine the performance of most kinds of energetic materials except cubanes.Our ML models are applied to predict ρ_(crystal) and H_(f,solid) of CHON-based molecules of the 150 million sized PubChem database,and screened out 56 candidates with competitive detonation performance and reasonable chemical structures.With further improvement in future,spatial matrices have the potential of becoming multifunctional ML simulation tools that could provide even better predictions in wider fields of materials science. | Chao Chen Danyang Liu Siyan Deng Lixiang Zhong Serene Hay Yee Chan Shuzhou Li Huey Hoon Hng | 2021 | Journal of Energy Chemistry2021，30，12： | 4 |
| 4 | Effects of nano-sized aluminum on detonation characteristics and metal acceleration for RDX-based aluminized explosive显示文摘Nano-sized aluminum(Nano-Al)powders hold promise in enhancing the total energy of explosives and the metal acceleration ability at the same time.However,the near-detonation zone effects of reaction between Nano-Al with detonation products remain unclear.In this study,the overall reaction process of 170 nm Al with RDX explosive and its effect on detonation characteristics,detonation reaction zone,and the metal acceleration ability were comprehensively investigated through a variety of experiments such as the detonation velocity test,detonation pressure test,explosive/window interface velocity test and confined plate push test using high-resolution laser interferometry.Lithium fluoride(LiF),which has an inert behavior during the explosion,was used as a control to compare the contribution of the reaction of aluminum.A thermochemical approach that took into account the reactivity of aluminum and ensuing detonation products was adopted to calculate the additional energy release by afterburn.Combining the numerical simulations based on the calculated afterburn energy and experimental results,the parameters in the detonation equation of state describing the Nano-Al reaction characteristics were calibrated.This study found that when the 170 nm Al content is from 0%to 15%,every 5%increase of aluminum resulted in about a 1.3%decrease in detonation velocity.Manganin pressure gauge measurement showed no significant enhancement in detonation pressure.The detonation reaction time and reaction zone length of RDX/Al/wax/80/15/5 explosive is 64 ns and 0.47 mm,which is respectively 14%and 8%higher than that of RDX/wax/95/5 explosive(57 ns and 0.39 mm).Explosive/window interface velocity curves show that 170 nm Al mainly reacted with the RDX detonation products after the detonation front.For the recording time of about 10 ms throughout the plate push test duration,the maximum plate velocity and plate acceleration time accelerated by RDX/Al/wax/80/15/5 explosive is 12%and 2.9 ms higher than that of RDX/LiF/wax/80/15/5,respectively,indicating that the aluminum reaction energy significantly increased the metal acceleration time and ability of the explosive.Numerical simulations with JWLM explosive equation of state show that when the detonation products expanded to 2 times the initial volume,over 80%of the aluminum had reacted,implying very high reactivity.These results are significant in attaining a clear understanding of the reaction mechanism of Nano-Al in the development of aluminized explosives. | Dan-yang Liu Pin Zhao Serene Hay-Yee Chan Huey Hoon Hng Lang Chen | 2021 | Defence Technology(防务技术)2021，17，2： | 2 |
| 5 | Effects of dopants on the microstructure and properties of PZT ceramics 显示文摘 | WEI Qiu HNG Huey-Hoon | 2002 | Mater Chem Phys2002，75，： | 2 |
| 6 | Critical cooling rates for glass formation in Zr-Al-Cu-Ni alloys 显示文摘 | HNG H H LI Y NG S C ONG C K | 1996 | J Non-Cryst Solids1996，208，12： | 1 |
| 7 | Bulk Nanosa'uctured Pro cessing of Aluminum Alloy 显示文摘 | Tham Y W Fu M W Hng H H | 2007 | Journal of Materials Processing Technology2007，，： | 1 |
| 8 | Microstructure and current-voltage characteristics of ZnO-V2O5-MnO2 varistor system显示文摘 | Hng H H Chan P L | 2003 | Ceramic international2003，，12： | 1 |
| 9 | A leavening strategy to prepare reduced graphene oxide foams 显示文摘 | Niu Z Chen J Hng H H | 2012 | Advanced Mate- rials2012，24，30： | 1 |
| 10 | Relation of cholangiocarcinomas to clonorchiasis and bile duct stones显示文摘 | Choi D Lim JH Hng ST | 2004 | Abdom Imaging2004，29，5： | 1 |
| 11 | Grain growth in sintered ZnO-1 mol2 V2 O5 ceramics显示文摘 | Hng H H Halim L | 2003 | Mater Lett2003，57，8： | 1 |
| 12 | Microstructure and Current-voltage Characteristics of ZnO-V2O5-MnO2 Varistor System显示文摘 | Hng H H Chan P L | 2004 | Ceramics International2004，30，7： | 1 |
| 13 | Characterisation of Zna (VO4) 2 pha ses in V2(/5-doped ZnO varistors显示文摘 | Hng H H Knowles K M | 1999 | Journal of the European Ceramic Society1999，19，67： | 1 |
| 14 | Effects of Catalpa ovata stem bark on atopic dermatitis -like skin lesions in NC/ Nga mice显示文摘 | Y hNG GABSIK CHI31 CI-IEOL- HAN LEE KYUNG]IN e al | 2013 | Journal of Ethnopharmacology2013，145，2： | 1 |
| 15 | The effect of slip regime on fretting wear-induced stress evolution 显示文摘 | HNG J LEEN S B MCCOLL I R | 2004 | International Journal of Fatigue2004，26，12： | 1 |
| 16 | Nanostructured metal oxide-based materials as advanced anodes for lithium-ion batteries 显示文摘 | WU H B CHEN J S HNG H H | 2012 | Nanoscale2012，4，8： | 1 |
| 17 | Characterisation of Zn3 (VO4)2 phases in V2Os-doped ZnO varistors 显示文摘 | Hng H H Knowles K M | 1999 | Journal of the European Ceramic Society1999，19，： | 1 |
| 18 | A study on the electrodeposi- tion behavior of cobalt antimonides in citric based solu- tions显示文摘 | Cheng H Hng H H Ma J | 2008 | Solid State Phenomena2008，136，： | 1 |
| 19 | Titania nanosheets hierarchically as sembled on carbon nanotubes as high-rate anodes for lithium-ion bat- teries显示文摘 | Wu B W Lou X W Hng H H | 2012 | Chemistry--A European J2012，18，11： | 1 |
| 20 | Microstructure and Current-Volt- age Characteristics of Muhicomponent Vanadium-Doped Zinc Oxide Varistors显示文摘 | Hng H Knowles K M | 2000 | Journal Of The American Ce- ramic Society2000，83，10： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员