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| 1 | Highly aligned lithiophilic electrospun nanofiber membrane for the multiscale suppression of Li dendrite growth显示文摘Using inorganic fibrous membranes as protective layers has yielded success in suppressing dendrite growth.However,conventional fibrous membranes usually have large voids and low affinity for Li,promoting inhomogeneous charge distribution and allowing some dendrites to grow.Herein,we introduce a highly aligned TiO_(2)/SiO_(2)(A-TS)electrospun nanofiber membrane as a protective layer for the Li metal anode.The A-TS membrane is fabricated by a custom-made electrospinning system with an automatic fiber alignment collector that allows control of the fibers’orientation.At the scale of the individual fibers,their high binding energies with Li can attract more“dead”Li by reacting with the SiO_(2) component of the composite,avoiding uncontrollable deposition on the metal anode.At the membrane scale,these highly ordered structures achieve homogeneous contact and charge distribution on the Li metal surface,leaving no vulnerable areas to nucleate dendrite formation.Additionally,the excellent mechanical and thermal stability properties of the A-TS membrane prevent any potential puncturing by dendrites or thermal runaway in a battery.Hence,an A-TS@Li anode exhibits stable cycling performance when used in both Li-S and Li-NCM811 batteries,highlighting significant reference values for the future design and development of high-energy-density metal-based battery systems. | Jianan Wang Qianyue Ma Shiyi Sun Kai Yang Qiong Cai Emilia Olsson Xin Chen Ze Wang Amr MAbdelkader Yinshi Li Wei Yan Shujiang Ding Kai Xi | 2022 | eScience2022，2，6： | 2 |
| 2 | Large capacitance and fast polarization response of thin electrolyte dielectrics by spin coating for two- dimensional MoS2 devices显示文摘 | Wu Zan Qiaochu Zhang Hu Xu Fuyou Liao Zhongxun Guo Jianan Deng Jing Wan Hao Zhu Lin Chen Qingqing Sun Shijin Ding Peng Zhou Wenzhong Bao David Wei Zhang | 2018 | Nano Research2018，11，7： | 1 |
| 3 | Pressure-induced ferroelectric and anti-ferroelectric phase transitions in LaN显示文摘In this work,we focus on the structural and electronic properties of lanthanum mono-nitride s under high pressure.Based on firstprinciples calculations and crystal structure predictions,we identified an anti-ferroelectric orthogonal phase with space group Pbcm.It is predicted to be thermodynamically stable from 20 to 60 GPa,above which the tetragonal phase without the antiferroelectric distortion will substitute it.However,the anti-ferroelectric distortion can be enhancedby reducing the pressure,and a phase transition to a NiAs-type(B8,P63/mmc) structure occurs at about 20 GPa.The calculated double-well potential for La atoms along the c direction in the B8 phase reveals that it should exhibit ferroelectric properties at low temperatures.Enthalpy calculations well confirm their phase transition sequences under high pressure.Electtonic properties calculations suggest that all the newly identified phases are semiconductors and the corresponding structural distortions can increase their bandgaps.When increasing the pressure to 50 GPa,the tetragonal phase undergoes a semiconductor-to-semimetal transition.Taking the spin-orbit coupling into account,the semimetal phase becomes a topological insulator with a small bandgap.Finally,given the similarities between the ionic compounds LaN and BaO,we predict that the most stable phase for BaO at about 25 GPa should also be the anti-ferroelectric orthogonal phase instead of the tetragonal phase. | Chi Ding Jianan Yuan Beatriz H.Cogollo-Olivo Yunlong Wang Xiaomeng Wang Jian Sun | 2023 | Science China(Physics,Mechanics & Astronomy)2023，66，2： | 0 |
| 4 | Earth Summit Mission 2022:Scientific Expedition and Research on Mt.Qomolangma Helps Reveal the Synergy between Westerly Winds and Monsoon and the Resulting Climatic and Environmental Effects显示文摘“Earth summit mission 2022”is one of the landmark scientific research activities of the Second Tibetan Plateau Scientific Expedition and Research(STEP).This scientific expedition firstly used advanced technology and methods to detect vertical meteorological elements and produce forecasts for mountain climbing.The“Earth summit mission 2022”Qomolangma scientific expedition exceeded an altitude of over 8000 meters for the first time and carried out a comprehensive scientific investigation mission on the summit of Mt.Qomolangma.Among the participants,the westerly–monsoon synergy and influence team stationed in the Mt.Qomolangma region had two tasks:1)detecting the vertical structure of the atmosphere for parameters such as wind,temperature,humidity,and pressure with advanced instruments for high-altitude detection at the Mt.Qomolangma base camp;and 2)observing extreme weather processes to ensure that members of the mountaineering team could successfully reach the top.Through this scientific expedition,a better understanding of the vertical structure and weather characteristics of the complex area of Mt.Qomolangma is gained. | Yaoming MA Weiqiang MA Huaguang DAI Lei ZHANG Fanglin SUN Jinqiang ZHANG Nan YAO Jianan HE Zhixuan BAI Yuejian XUAN Yunshuai ZHANG Yuan YUAN Chenyi YANG Weijun SUN Ping ZHAO Minghu DING Kongju ZHU Jie HU Bian Bazhuga Bai Juepingcuo Zhuo Ma Ren Qingnima Suo Langwangdui Yang Zong Haikun WEN | 2023 | Advances in Atmospheric Sciences2023，40，2： | 0 |
| 5 | Efficient and Generic Preparation of Diverse Polyelectrolyte Nanogels by Electrostatic Assembly Directed Polymerization显示文摘Nanogels hold promise as soft and functional carriers and nanoreactors,but whether they will ever reach the stage of large-scale application depends crucially on efficient production methods,and on what interesting properties and functionalities they can have.In particular,nanogels consisting of highly charged polyelectrolyte have not yet been very much explored.Here,the authors present a novel and generic strategy for controlled and efficient synthesis of a large diversity of polyelectrolyte nanogels.The method is based on polymerizing an ionic monomer in the presence of an oppositely charged polyion-neutral diblock copolymer as template,while adding a cross-linker.The growing polymer chains assemble with the template,forming polyion complex micelles,which dissociate upon increasing salt concentration.Subsequent separation yields nanogels with well-controlled size and properties,and free template polymers that can be used again.Our design can be applied generally to a wide range of both cationic and anionic monomers,as well as various cross-linkers.Scaled-up production presents no problems as increasing monomer concentration(hundreds of mM)and reaction volume(up to 1 L)hardly compromise product quality.Moreover,the obtained nanogels with their well-controlled size,morphology,chemistry,and cross-linking degree perform well as soft nanocarriers and catalytic nanoreactors. | Peng Ding Jianan Huang Cheng Wei Wei Liu Wenjuan Zhou Jiahua Wang Mingwei Wang Xuhong Guo Martien A.Cohen Stuart Junyou Wang | 2020 | CCS Chemistry2020，2，6： | 0 |
| 6 | Solvent Thermal Method to control Lead Sulfi de Nano/Micron Crystal and Its Ni/PbS Composites显示文摘Lead sulfide (PbS) is an important IV-VI semiconductor material with narrow bandwidth and wide wave width, which attracts people's attention. Nano-level PbS has many novel optoelectronic properties and has a wide range of applications in the fi eld of optoelectronics, such as infrared optoelectronic devices, photovoltaic devices, light-emitting devices and display devices. In this paper, Pbs is produced by solvent thermal method by using lead acetate as lead source, sulfur power as sulfur source, ethylene glycol as solvent, and acetic acid to provide acidic environment. The reaction acidity, type of lead source, amount of sulfur source and other aspects will be explored. The products obtained under diff erent conditions were characterized by X-ray diff raction (XRD), optical microscopy and scanning electron microscopy (SEM). The results showed that PbS produced at 140°C for 24 hours, using 14mL ethylene glycol and 1.2mL acetic acid has the best morphology. It has a non-planar six-arm symmetrical structure. Finally, we prepare the lead sulfi de composite Ni/PbS, and characterized it. | Yajia Ding Bing Bai Jianan Peng | 2018 | Characterization and Application of Nanomaterials2018，1，1： | 0 |
| 7 | Grap hical Minimax Game and Off-Policy Reinforcement Learning for Heterogeneous MASs with Spanning Tree Condition显示文摘In this paper,the optimal consensus control problem is investigated for heterogeneous linear multi-agent systems(MASs)with spanning tree condition based on game theory and rein-forcement learning.First,the graphical minimax game algebraic Riccati equation(ARE)is derived by converting the consensus problem into a zero-sum game problem between each agent and its neighbors.The asymptotic stability and minimax validation of the closed-loop systems are proved theoretically.Then,a data-driven off-policy reinforcement learning algorithm is proposed to online learn the optimal control policy without the information of the system dynamics.A certain rank condition is established to guarantee the convergence of the proposed algorithm to the unique solution of the ARE.Finally,the e®ectiveness of the proposed method is demonstrated through a numerical simulation. | Wei Dong Jianan Wang Chunyan Wang Zhenqiang Qi Zhengtao Ding | 2021 | Guidance, Navigation and Control2021，1，3： | 0 |
| 8 | Adaptive temporal patterns of echolocation and flight behaviors used to fly through varied-sized windows by 2 species of high duty cycle bats显示文摘As actively sensing animals guided by acoustic information, echolocating bats must adapt their vocal–motor behavior to various environmentsand behavioral tasks. Here, we investigated how the temporal patterns of echolocation and flight behavior were adjusted in 2 species of batswith a high duty cycle (HDC) call structure, Rhinolophus ferrumequinum and Hipposideros armiger, when they flew along a straight corridorand then passed through windows of 3 different sizes. We also tested whether divergence existed in the adaptations of the 2 species. Both H.armiger and R. ferrumequinum increased their call rates by shortening the pulse duration and inter-pulse interval for more rapid spatial samplingof the environment when flying through smaller windows. Bats produced more sonar sound groups (SSGs) while maintaining a stable proportion of calls that made up SSGs during approaches to smaller windows. The 2 species showed divergent adjustment in flight behavior across3 different window sizes. Hipposideros armiger reduced its flight speed to pass through smaller windows while R. ferrumequinum increasedits flight speed. Our results suggest that these 2 species of HDC bats adopt similar acoustic timing patterns for different tasks although theyperformed different flight behaviors. | Jianan Ding Yu Zhang Fujie Han Tingting Jiang Jiang Feng Aiqing Lin Ying Liu | 2023 | Current Zoology2023，69，1： | 0 |
| 9 | Designing interstitial boron-doped tunnel-type vanadium dioxide cathode for enhancing zinc ion storage capability显示文摘Chemical doping is a powerful method to intrinsically tailor the electrochemical properties of electrode materials.Here,an interstitial boron-doped tunnel-type VO_(2)(B)is constructed via a facile hydrothermal method.Various analysis techniques demonstrate that boron resides in the interstitial site of VO_(2)(B)and such interstitial doping can boost the zinc storage kinetics and structural stability of VO_(2)(B)cathode during cycling.Interestingly,we found that the boron doping level has a saturation limit peculiarity as proved by the quantitative analysis.Notably,the 2 at.%boron-doped VO_(2)(B)shows enhanced zinc ion storage performance with a high storage capacity of 281.7 mAh g^(-1) at 0.1 A g^(-1),excellent rate performance of 142.2 mAh g^(-1) at 20 A g^(-1),and long cycle stability up to 1000 cycles with the capacity retention of 133.3 mAh g^(-1) at 5 A g^(-1).Additionally,the successful preparation of the boron-doped tunneltype α-MnO_(2) further indicates that the interstitial boron doping approach is a general strategy,which supplies a new chance to design other types of functional electrode materials for multivalence batteries. | Shiwen Wang Hang Zhang Kang Zhao Wenqing Liu Nairui Luo Jianan Zhao Shide Wu Junwei Ding Shaoming Fang Fangyi Cheng | 2023 | Carbon Energy2023，5，8： | 0 |
| 10 | Investigation on Thermal Insulation and Mechanical Strength of Lightweight Aggregate Concrete and Porous Mortar in Cold Regions显示文摘Thermal insulation is an important indicator to evaluate the construction material in cold region engineering.As we know,adding the industrial waste as lightweight aggregate or creating the pore inside the cement-based composite could make the texture loose,and the thermal insulating capacity of the material would be improved with this texture.Using these methods,the industrial by-product and engineering waste could be cycled in an efficient way.Moreover,after service the fragmented cement composites paste could be used as aggregate in the thermal insulating concrete again.While the porous texture is not favorable for the mechanical strength and long-term durability in a cold environment.To balance the above three requirements from two opposite directions,different processing methods were applied to create the thermal insulation concrete/mortar.Firstly,the organic/inorganic lightweight aggregate,including the Expanded Polystyrene(EPS),Expanded Perlite(EP),and Ceramsite(CRMST)particles,were applied to create the Lightweight Aggregate Concrete(LWAC).As the comparative tests,the expanded Superabsorbent Polymer(SAP)hydrogel and Air-Entraining Agent(AEA)were also introduced to create the porous mortar.The above concrete/mortar was tested in the normal state and under the Freeze-Thaw cycle to explore the engineering performance in cold regions.During the experimenting process,the thermal insulation,mechanical strength,and frost resistance of these cement-based composites were investigated,and an optimal thermal insulation concrete/mortar was determined. | Jianan Wu Ke Xue Zhaowei Ding Lei Lang Kang Gu Xiaolin Li Mingli Zhang Desheng Li | 2022 | Journal of Renewable Materials2022，10，12： | 0 |
| 11 | Reflection sensitivity of dual-state quantum dot lasers显示文摘This work experimentally and theoretically demonstrates the effect of excited state lasing on the reflection sensitivity of dual-state quantum dot lasers,showing that the laser exhibits higher sensitivity to external optical feedback when reaching the excited state lasing threshold.This sensitivity can be degraded by increasing the excited-to-ground-state energy separation,which results in a high excited-to-ground-state threshold ratio.In addition,the occurrence of excited state lasing decreases the damping factor and increases the linewidth enhancement factor,which leads to a low critical feedback level.These findings illuminate a path to fabricate reflectioninsensitive quantum dot lasers for isolator-free photonic integrated circuits. | ZHIYONG JIN HEMING HUANG YUEGUANG ZHOU SHIYUAN ZHAO SHIHAO DING CHENG WANG YONG YAO XIAOCHUAN XU FRÉDÉRIC GRILLOT JIANAN DUAN | 2023 | Photonics Research2023，11，10： | 0 |
| 12 | High-energy-density metal nitrides with armchair chains显示文摘Polymeric nitrogen has attracted much attention owing to its possible application as an environmentally safe high-energy-density material.Based on a crystal structure search method accelerated by the use of machine learning and graph theory and on first-principles calculations,we predict a series of metal nitrides with chain-like polynitrogen(P_(21)-AlN_(6),P2_(1)-GaN_(6),P-1-YN_(6),and P_(4)/mnc-TiN_(8)),all of which are estimated to be energetically stable below 40.8 GPa.Phonon calculations and ab initio molecular dynamics simulations at finite temperature suggest that these nitrides are dynamically stable.We find that the nitrogen in these metal nitrides can polymerize into two types of poly-N^(2-)_(4)chains,in which theπelectrons are either extended or localized.Owing to the presence of the polymerized N4 chains,these metal nitrides can store a large amount of chemical energy,which is estimated to range from 4.50 to 2.71 kJ/g.Moreover,these compounds have high detonation pressures and detonation velocities,exceeding those of conventional explosives such as TNT and HMX. | Jianan Yuan Kang Xia Chi Ding Xiaomeng Wang Qing Lu Jian Sun | 2022 | Matter and Radiation at Extremes2022，7，3： | 0 |
| 13 | Four-wave mixing in 1.3 μm epitaxial quantum dot lasers directly grown on silicon显示文摘This work compares the four-wave mixing(FWM)effect in epitaxial quantum dot(QD)lasers grown on silicon with quantum well(QW)lasers.A comparison of theory and experiment results shows that the measured FWM coefficient is in good agreement with theoretical predictions.The gain in signal power is higher for p-doped QD lasers than for undoped lasers,despite the same FWM coefficient.Owing to the near-zero linewidth enhancement factor,QD lasers exhibit FWM coefficients and conversion efficiency that are more than one order of magnitude higher than those of QW lasers.Thus,this leads to self-mode locking in QD lasers.These findings are useful for developing on-chip sources for photonic integrated circuits on silicon. | JIANAN DUAN BOZHANG DONG WENG W.CHOW HEMING HUANG SHIHAO DING SONGTAO LIU JUSTIN C.NORMAN JOHN E.BOWERS FREDEIC GRILLOT | 2022 | Photonics Research2022，10，5： | 0 |
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