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Nano Research 2022年第10期15卷 8991-8999页

作者： Zhihu Pan chenghao yang Zhiwu Chen Xiaohong Ji School of Materials Science and Engineering South China University of TechnologyGuangzhou 510641China School of Environment and Energy South China University TechnologyGuangzhou 510006China

The capacitance loss caused by slow electron and ion migration kinetics in thick electrode with high-mass loading has been regarded as a great challenge in the field of electrochemical energy ***,we demonstrate a facile electrochemical deposition method for coating the heterostructured Ti_(3)C_(2)T_(x)/WO_(x) onto flexible carbon cloth( Ti_(3)C_(2)T_(x)/WO_(x)@CC).In the Ti_(3)C_(2)T_(x)/WO_(x) heterojunction,the mixed-valence WOx core provides abundant active sites for H+ions accommodation,while Ti_(3)C_(2)Tx shell can not only prevent peeling off the thick WOx but also act as an interconnected conductive *** Ti_(3)C_(2)T_(x)/WO_(x)@CC flexible electrode with an ultrahigh mass loading of 34.9 mg·cm^(−2) exhibits a high areal capacitance of 5.73 F·cm^(−2) at 5 mA·cm^(−2) and excellent rate ***,the Ti_(3)C_(2)T_(x)/WO_(x)@CC electrode under such a high mass loading still delivers a gravimetric capacitance of 164 F·g^(−1) and areal capacitance of Ti_(3)C_(2)T_(x)/WO_(x)@CC electrode increases linearly with the WOx mass ***,a symmetrical supercapacitor assembled with Ti_(3)C_(2)T_(x)/WO_(x)@CC electrode exhibits a good areal energy density of 96.8μWh·cm^(−2) at a power density of 1.5 mW·cm^(−2).This work verifies high mass loading of active materials per unit electrode area for charge storage of supercapacitors in limited space,indicating the great potential in the development of commercially available thick metal-oxide film supercapacitors.

关键词： high mass loading tungsten oxide heterojunction Ti_(3)C_(2)Tx-MXene flexible symmetric supercapacitor

Design of a Flexible Capture Mechanism Inspired by Sea Anemone for Non-cooperative Targets

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Chinese Journal of Mechanical Engineering 2021年第4期34卷 236-248页

作者： Jiankun yang Chengwei Ren chenghao yang Youyu Wang Shumin Wan Rongjie Kang Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin UniversityTianjin 300350China State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110169China Beijing Institute of Spacecraft System Engineering CAST Beijing 100094China

Robotic grippers have been used in industry as end-effectors but are usually limited to operations in pre-defined ***,few devices can capture irregularly shaped dynamic targets in space,underwater and other unstructured *** this paper,a novel continuum arm group mechanism inspired by the morphology and motions of sea anemones is *** is able to dissipate and absorb the kinetic energy of a fast moving target in omni-direction and utilize multiple arms to wrap and lock the target without accurate positioning ***-driven actuation systems are implemented in the individual continuum arms,achieving both bending motion and stiffness *** finite element method,the influence of different configurations of the continuum arm group on the capture performance is analyzed.A robotic prototype is constructed and tested,showing the presented arm group mechanism has high adaptability to capture targets with different sizes,shapes,and incident angles.

关键词： Non-cooperative targets Continuum arm group Wire-driven mechanism

Regulating solid electrolyte interphase film on fluorinedoped hard carbon anode for sodium-ion battery

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Carbon Energy 2024年第6期6卷 200-215页

作者： Cuiyun yang Wentao Zhong Yuqiao Liu Qiang Deng Qian Cheng Xiaozhao Liu chenghao yang Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhouChina

For the performance optimization strategies of hard carbon,heteroatom doping is an effective way to enhance the intrinsic transfer properties of sodium ions and electrons for accelerating the reaction ***,the previous work focuses mainly on the intrinsic physicochemical property changes of the material,but little attention has been paid to the resulting interfacial regulation of the electrode surface,namely the formation of solid electrolyte interphase(SEI)*** this work,element F,which has the highest electronegativity,was chosen as the doping source to,more effectively,tune the electronic structure of the hard *** effect of F-doping on the physicochemical properties of hard carbon was not only systematically analyzed but also investigated with spectroscopy,optics,and in situ characterization techniques to further verify that appropriate F-doping plays a positive role in constructing a homogenous and inorganic-rich SEI *** experimentally demonstrated link between the electronic structure of the electrode and the SEI film properties can reframe the doping optimization strategy as well as provide a new idea for the design of electrode materials with low reduction kinetics to the *** a result,the optimized sample with the appropriate F-doping content exhibits the best electrochemical performance with high capacity(434.53 mA h g^(-1)at 20mA g^(-1))and excellent rate capability(141 mAh g^(-1)at 400 mA g^(-1)).

关键词： F-doping hard carbon reduction kinetics sodium-ion batteries solid electrolyte interphase film

Three-dimensional circulation in northern South China Sea during early summer of 2015

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Acta Oceanologica Sinica 2021年第7期40卷 1-14页

作者： Huiqun Wang Yaochu Yuan Weibing Guan chenghao yang Dongfeng Xu State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China Ocean College Zhejiang UniversityZhoushan 316021China

Using the hydrographic data obtained during two nearly simultaneous surveys in June 2015,we carried out semi-diagnostic calculations with the help of a finite element model and a modified inverse method,to study the circulation in the northern South China Sea(NSCS)during the early summer of 2015.A number of new circulation features were found.(1)In most of the observation region,a large,basin-scale anticyclonic gyre appeared south of the 50-m isobath,which contained anticyclonic *** anticyclonic eddy existed from the sea surface to 50-m depth,whose center showed no tilt,while the center of another eddy tilted eastward from the sea surface to 500-m *** the eastern part of the observation region,which is west of the Dongsha Islands,there was a sub-basin-scale cyclonic gyre containing a cyclonic eddy whose center tilted southward from the sea surface to 200-m depth.(2)There was a cross-continental slope current(CCSC)in the area southwest of the Dongsha *** volume transport was about 2.0×10^(6) m^(3)/s.(3)From the estimated order of magnitude of the stream function equation,the joint effect term of the baroclinity and relief(JEBAR)andβ-effect term are two important dynamic mechanisms affecting the variation of the circulation in the NSCS.(4)The JEBAR,as a transport-generating term,resulted in the dynamic mechanism determining the pattern of the depth-averaged flow across the contours of potential vorticity fH–***,we show that the negative values of the JEBAR were the most dominant dynamic mechanism,causing the CCSC southwest of the Dongsha Islands to deflect from the isobaths and veer toward the deep *** CCSC around the Dongsha Islands was located further southwest during the early summer of 2015 than during the fall of 2005(revealed by a published study),which suggests that the location of the CCSC around the Dongsha Islands may vary with season.

关键词： South China Sea circulation numerical model cross-continental slope current seasonality of cross-continental slope current

Recent progress in synthesis and surface modification of nickel-rich layered oxide cathode materials for lithium-ion batteries

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International Journal of Extreme Manufacturing 2022年第4期4卷 102-146页

作者： Jing Li Wentao Zhong Qiang Deng Qimeng Zhang chenghao yang Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006People’s Republic of China

Nickel-rich layered oxides have been identified as the most promising commercial cathode materials for lithium-ion batteries(LIBs)for their high theoretical specific ***,the poor cycling stability of nickel-rich cathode materials is one of the major barriers for the large-scale usage of *** existing obstructions that suppress the capacity degradation of nickel-rich cathode materials are as a result of phase transition,mechanical instability,intergranular cracks,side reaction,oxygen loss,and thermal instability during ***–shell structures,oxidating precursors,electrolyte additives,doping/coating and synthesizing single crystals have been identified as effective methods to improve cycling stability of nickel-rich cathode ***,recent progress of surface modification,*** and doping,in nickel-rich cathode materials are summarized based on Periodic table to provide a clear *** performances and mechanisms of modified structure are discussed in *** is hoped that an overview of synthesis and surface modification can be presented and a perspective of nickel-rich materials in LIBs can be given.

关键词： nickel-rich layered oxides capacity degradation surface modification single-crystal cathode

The diel vertical migration of sound scatterers observed by an acoustic Doppler current profiler in the Luzon Strait from July 2009 to April 2011

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Acta Oceanologica Sinica 2013年第11期32卷 1-9页

作者： yang chenghao LIAO Guanghong YUAN Yaochu CHEN Hong ZHU Xiaohua State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic Administration

Acoustic Doppler current profiler （ADCP） receives echoes from sound scatterers, then their speed is calcu- lated by the Doppler effect. In the open ocean, most of these backscatterers are from the plankton. The sound scatterers descend down to depth at around dawn, their mean speed is 2.9 cm/s, then they ascend up to the surface layer at around dusk with a mean speed of 2.1 cm/s, in the Luzon Strait. The descending speed is faster, which suggests that this zooplankton population may accelerate its downward migration under the action of the gravity. The vertical distribution of a mean volume backscattering strength （MVB- S） in the nighttime has two peaks, which locate near the upper and lower boundary layers of halocline, respectively. However, the backscatterers only aggregate near the surface layer in the daytime. The diel ver- tical migration （DVM） of sound scatterers has several characteristic patterns, it is stronger in summer, but weaker in winter, and the maximum peak occurs in September. The DVM occurrence is synchronous with the seawater temperature increasing at around dawn and dusk, it may affect the ocean mixing and water stratification,

关键词： diel vertical migration acoustic Doppler current profiler mean volume backscattering strength,Luzon Strait water stratification

Cobalt-Free BaFe_(0.6)Zr_(0.1)Y_(0.3)O_(3−δ)Oxygen Electrode for Reversible Protonic Ceramic Electrochemical Cells

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Transactions of Tianjin University 2023年第6期29卷 444-452页

作者： chenghao yang Jin Li Ao Hu Jian Pu Bo Chi State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials MOE Key Laboratory for the Green Preparation and Application of Functional MaterialsFaculty of Materials Science and EngineeringHubei UniversityWuhan 430062China MOE Key Laboratory of Material Chemistry for Energy Conversion and Storage Huazhong University of Science and TechnologyWuhan 430074China

Reversible protonic ceramic electrochemical cells(R-PCECs)are ideal,high-effi ciency devices that are environmentally friendly and have a modular *** paper studies BaFe_(0.6)Zr_(0.1)Y_(0.3)O_(3−δ)(BFZY3)as a cobalt-free perovskite oxygen electrode for high-performance R-PCECs where Y ions doping can increase the concentration of oxygen vacancies with a remarkable increase in catalytic *** cell with confi guration of Ni-BZCYYb/BZCYYb/BFZY3 demonstrated promising performance in dual modes of fuel cells(FCs)and electrolysis cells(ECs)at 650℃with low polarization resistance of 0.13Ωcm^(2),peak power density of 546.59 mW/cm^(2)in FC mode,and current density of−1.03 A/cm^(2)at 1.3 V in EC *** alternative operation between FC and EC modes for up to eight cycles with a total of 80 h suggests that the cell with BFZY3 is exceptionally stable and reversible over the long *** results indicated that BFZY3 has considerable potential as an air electrode material for R-PCECs,permitting effi cient oxygen reduction and water splitting.

关键词： Protonic ceramic cells Oxygen electrode Perovskite oxides Cobalt-free Oxygen vacancies

Effects of mesoscale eddies on the internal solitary wave propagation

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Acta Oceanologica Sinica 2012年第5期31卷 26-40页

作者： LIAO Guanghong yang chenghao XU Xiaohua SHI Xingang YUAN Yaochu HUANG Weigen State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic AdministrationHangzhou 310012China College of Information Science and Technology Ocean University of ChinaQingdao 266100China Beijing Branch of China National Offshore Oil Corporation Energy Technology and Services Limited Beijing 100027China

The mesoscale eddy and internal wave both are phenomena commonly observed in oceans. It is aimed to investigate how the presence of a mesoscale eddy in the ocean affects wave form deformation of the internal solitary wave propagation. An ocean eddy is produced by a quasi-geostrophic model in f-plane, and the one-dimensional nonlinear variable-coefficient extended Korteweg-de Vries （eKdV） equation is used to simulate an internal solitary wave passing through the mesoscale eddy field. The results suggest that the mode structures of the linear internal wave are modified due to the presence of the mesoscale eddy field. A cyclonic eddy and an anticyclonic eddy have different influences on the background environment of the internal solitary wave propagation. The existence of a mesoscale eddy field has almost no prominent impact on the propagation of a smallamplitude internal solitary wave only based on the first mode vertical structure, but the mesoscale eddy background field exerts a considerable influence on the solitary wave propagation if considering high-mode vertical structures. Furthermore, whether an internal solitary wave first passes through anticyclonic eddy or cyclonic eddy, the deformation of wave profiles is different. Many observations of solitary internal waves in the real oceans suggest the formation of the waves. Apart from topography effect, it is shown that the mesoscale eddy background field is also a considerable factor which influences the internal solitary wave propagation and deformation.

关键词： mesoscale eddy internal solitary wave variable-coefficient extended Korteweg-de Vries equation wave deformation

In sight of K-deficient layered K_(x)MnO_(2) cathode for potassium-ions batteries

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Journal of Energy Chemistry 2022年第1期31卷 335-343,I0009页

作者： Tiezhong Liu Shuang Hou Youpeng Li Shoufeng Xue Junhua Hu Haikuo Fu chenghao yang Lingzhi Zhao Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials Institute of Semiconductor Science and TechnologySouth China Normal UniversityGuangzhou 510631GuangdongChina Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of Technology Guangzhou 510631GuangdongChina Institute of Science and Technology Innovation South China Normal UniversityQingyuan 511517GuangdongChina SCNU Qingyuan Institute of Science and Technology In novation Co. Ltd.Qingyuan 511517GuangdongChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina(Qingyuan Jiazhi New Materials Research Institute Co.Ltd.Qingyuan 511517GuangdongChina

Potassium-ions batteries(PIBs)are attracting increasing attention as up-and-coming youngster in largescale grid-level energy storage benefiting from its low-cost and high energy ***,enough researches regarding indispensable cathode materials for PIBs are badly ***,we synthesize K-deficient layered manganese-based oxides(P2-K_(0.21)MnO_(2) and P3-K_(0.23)MnO_(2))and investigate them as cathode of PIBs for the first *** the newcomer of potassium-containing layered manganese-based oxides(K_(x)MnO_(2))group,P2-K_(0.21)MnO_(2) delivers high discharge capacity of 99.3 mAh g^(-1) and P3-K_(0.23)MnO_(2) exhibits remarkable capacity retention rate of 75.5%.Besides,in-situ XRD and ex-situ XRD measurements reveal the reversible phase transition of P2-K_(0.21)MnO_(2) and P3-K_(0.23)MnO_(2) with the potassium-ions extraction and reinsertion,*** work contributes to a better understanding for the potassium storage in K-deficient layered K_(x)MnO_(2)(x≤0.23),possessing an important basic scientific significance for the exploitation and application of layered K_(x)MnO_(2) in PIBs.

关键词： Potassium-ions battery Cathode Layered K_(x)MnO_(2) P2/P3-type structure Low potassium content

Analysis of internal tidal characteristics in the layer above 450 m from acoustic Doppler current profiler observations in the Luzon Strait

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Science China Earth Sciences 2011年第7期54卷 1078-1094页

作者： LIAO GuangHong YUAN YaoChu Kaneko ARATA yang chenghao CHEN Hong Taniguchi NAOKAZU Gohda NORIAKI College of Information Science and Technology Ocean University of China Qingdao 266100 China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China Graduate School of Engineering Hiroshima University Higashi-Hiroshima 739-8527 Japan

The characteristics of internal tides in the upper layer of the Luzon Strait are investigated on the basis of direct-observation current data recorded on April 25 and September 26, 2008 by an acoustic Doppler current profiler. Spectral analysis and energy estimation show that the diurnals and semidiurnals carry most of the energy of internal tides. Values of the depth-integrated total energy E for the three frequency bands of diurnal, semidiurnal, and high frequencies are 31, 6.9, and 3.4 kJ. m, respectively. Near-inertial peaks are only present in the baroclinic component. The behavior of typical tidal frequencies （i.e., O1, K1, M2, MK3, and M4） and the near-inertial frequency is basically consistent with linear internal wave theory, which predicts E＋（ω）/E_（ω）=（ω-f）2/（ω＋f）2 at depths above 66 m, while not all prominent tidal components coincide well with the relation of the linear internal wave field at other depths. Examinations of depth structures of the baroclinic tides and temporal variations show that the surface tides and internal tides are both of mixed type, having diurnal inequality and spring-neap fortnight periods. The K1 and O1 tides have comparable cross- and along-shelf components, while the M2 and S2 tides propagate toward the shelf in the northern South China Sea as wave beams. The amplitude and phase of internal tides vary with time, but M2 and S2 tides appear to have structures dominated by the first mode, while the K1 and O1 tides resemble second-mode structures. The minor to major axis ratios are close to expected values of flω in the thermocline.

关键词： current observation acoustic Doppler current prof'fler internal tides internal waves Luzon Strait