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Research progresses of cathodic hydrogen evolution in advanced lead–acid batteries

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Science Bulletin 2016年第6期61卷 451-458页

作者： Feng Wang Chen Hu Min Zhou Kangli Wang Jiali Lian Jie Yan Shijie Cheng kai jiang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074 China China Electric Power Research Institute Beijing 100192 China

Integrating high content carbon into the negative electrodes of advanced lead–acid batteries effectively eliminates the sulfation and improves the cycle life,but brings the problem of hydrogen evolution,which increases inner pressure and accelerates the water *** this review,the mechanism of hydrogen evolution reaction in advanced lead–acid batteries,including lead–carbon battery and ultrabattery,is briefly *** strategies on suppression hydrogen evolution via structure modifications of carbon materials and adding hydrogen evolution inhibitors are summarized as *** review points out effective ways to inhibit hydrogen evolution and prolong the cycling life of advanced lead–acid battery,especially in high-rate partial-state-of-charge applications.

关键词： Lead–carbon battery Ultrabattery Hydrogen evolution reaction Hydrogen inhibition

Two-dimensional Ni（OH）2 nanoplates for flexible on-chip m icrosu pe rcapac itors

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Nano Research 2015年第11期8卷 3544-3552页

作者： Hao Wu kai jiang Shaosong Gu Hong Yang Zheng Lou Di Chen Guozhen Shen State Key Laboratory for Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China The Key Laboratory of Resource Chemistry of Ministry of Education Shanghai Key Laboratory of Rare Earth Functional Materials and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors Shanghai Normal University Shanghai 200234 China Institute & Hospital of Hepatobiliary Surgery Key Laboratory of Digital Hepatobiliary Surgery of Chinese PLA Chinese PLA Medical School Chinese PLA General Hospital Beijing 100853 China School of Mathematics and Physics University of Science and Technology Beijing Beijing 100083 China China University of Mining & Technology Beijing 100083 China

On-chip microsupercapacitors （MSCs） compatible with on-chip geometries of integrated circuits can be used either as a separate power supply in microelectronic devices or as an energy storage or energy receptor accessory unit. In this work, we report the fabrication of flexible two-dimensional Ni（OH）2 nanoplates-based MSCs, which achieved a specific capacitance of 8.80 F/cm^3 at the scan rates of 100 mV/s, losing only 0.20% of its original value after 10,000 charge/discharge cycles. Besides, the MSCs reached an energy density of 0.59 mWh/cm^3 and a power density up to 1.80 W/cm^3, which is comparable to traditional carbon-based devices. The flexible MSCs exhibited good electrochemical stability when subjected to bending at various conditions, illustrating the promising application as electrodes for wearable energy storage.

关键词： nanoplates Ni(OH)2 microsupercapacitors on-chip flexible all-solid-state

A Highly Sensitive In-Situ Turbidity Sensor With Low Power Consumption

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Photonic Sensors 2014年第1期4卷 77-85页

作者： Yi Hu Lei Sun Shuming Ye Hang Chen kai jiang Jianming Pan College of Biomedical Engineering&Instrumentation Science in Zhejiang University Hangzhou310027China Key lab of Biomedical Engineering of Ministry of Education in Zhejiang University Hangzhou310027China Laboratory of Marine Ecosystem and Biogeochemistry State Oceanic Administration(SOA)Hangzhou310012China

A highly sensitive in-situ turbidity sensor with the low power consumption was proposed and evaluated in this study. To meet the practical requirements of the in-situ detection, we have designed the light scattering path, watertight mechanical structure, and ultra-weak scattering light detecting method. Experiments showed that the sensor had a sensitivity of 0.0076 FTU with the concentration range of 0 - 25 FTU and the R-square of 0.9999. The sensor could withstand the water pressure in depth of 1000m and had the low power consumption in the active mode 10.4mA, sleep mode 65 pA with a supply voltage of 8.4V. Southern China Sea buoy experiments indicated that the sensor could work well in the actual in-situ environment. In comparison with sensors of other companies, our sensor had relatively more comprehensive performance.

关键词： In-situ turbidity sensor high sensitivity low power consumption water tight mechanical structure

Revolutionizing wearable technology:advanced fabrication techniques for bodyconformable electronics

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npj Flexible Electronics 2024年第1期8卷 23-42页

作者： Ruilai Wei Haotian Li Zhongming Chen Qilin Hua Guozhen Shen kai jiang School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijingChina Institute of Flexible Electronics Beijing Institute of TechnologyBeijingChina Faculty of Hepato-Pancreato-Biliary Surgery Chinese PLA General HospitalInstitute of Hepatobiliary Surgery of Chinese PLA&Key Laboratory of Digital Hepatobiliary SurgeryBeijingPR China

With the increasing demand for wearable electronic products,there is a pressing need to develop electronic devices that seamlessly conform to the contours of the human body while delivering excellent performance and *** rigid electronic fabrication technologies fall short of meeting these requirements,necessitating the exploration of advanced flexible fabrication technologies that offer new possibilities for designing and fabricating flexible and stretchable electronic products,particularly in wearable *** time,the continuous development of innovative fabrication techniques has ushered in significant improvements in the design freedom,lightweight,seamless integration,and multifunctionality of wearable ***,we provide a comprehensive overview of the advancements facilitated by advanced fabrication technology in wearable *** specifically focuses on key fabrication methods,including printed electronics fabrication,soft transfer,3D structure fabrication,and deformation *** highlighting these advancements,it sheds light on the challenges and prospects for further development in wearable electronics fabrication *** introduction of advanced fabrication technologies has revolutionized the landscape of wearable/conformable electronics,expanding their application domains,streamlining system complexity associated with customization,manufacturing,and production,and opening up new avenues for innovation and development of body-conformable electronics.

关键词： wear electronics body

High genetic diversity and strong differentiation in dramatically fluctuating populations of Zostera japonica(Zosteraceae):implication for conservation

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Journal of Plant Ecology 2018年第5期11卷 789-797页

作者： kai jiang Po-Keung Eric Tsang Na-Na Xu Xiao-Yong Chen School of Ecological and Environmental Sciences Shanghai Key Lab of Urban Ecological Processes and Eco-RestorationEast China Normal UniversityShanghai 200241China Shanghai Chenshan Plant Science Research Center Chinese Academy of SciencesChenshan Botanical GardenShanghai 201602China Department of Science and Environmental Studies The Education University of Hong KongHong KongChina School of Fishery Zhejiang Ocean UniversityZhoushan 326022China

Aims Seagrasses provide a variety of ecosystem goods and services,but they are subjected to frequently anthropogenic *** this study,we genotyped samples collected from Zostera japonica mead-ows with dramatic fluctuations in the area in order to understand the distribution of genetic variation within and among *** We collected samples from eight extant populations along coastal areas of southern *** polymorphic microsatellites were adopted to genotype the *** of genetic diversity and differentiation were calculated with general *** Findings High levels of genetic diversity were found in the studied populations,suggesting that the effective population size has not decreased signifi-cantly,which was supported by no signs of recent *** genetic diversity reflects an important role of sexual seedling recruit-ment in *** *** found a significant relationship between genetic differentiation and the shortest sea surface distance of populations,suggesting that ocean currents play a critical role in shap-ing the genetic structure of *** *** soft-ware analysis clustered the eight populations into two groups:western and eastern populations separated by the Qiongzhou Strait/Leizhou Peninsula,hinting that there was very limited gene flow through the narrow strait in this marine *** populations had high contribu-tion diversity and,thus,high priority for in situ conservation.

关键词： Seagrass Zostera japonica Genetic diversity Genetic differentiation Microsatellites

Conductive Framework-Stabilized Zn-Metal Anodes for High-Performance Zn-Ion Batteries and Capacitors

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Energy Material Advances 2023年第1期4卷 272-280页

作者： Zhe Gong Zhuo Li Pengfei Wang kai jiang Zhaowen Bai kai Zhu Jun Yan Ke Ye Guiling Wang Dianxue Cao Guohua Chen Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001P.R.China Key Laboratory of Polymer and Catalyst Synthesis Technology of Liaoning Province School of Environmental and Chemical EngineeringShenyang University of TechnologyShenyang 110870P.R.China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARP.R.China School of Energy and Environment City University of Hong KongHong Kong 999077P.R.China

Aqueous zinc(Zn)-based energy storage devices possess promising applications for large-scale energy storage systems due to the advantage of high safety,low price,and ***,their development is restricted by dendrite growth and hydrogen evolution issues from the Zn-metal ***,a facile stress-pressing method is reported for constructing a grid zinc anode(GZn)with a conductive *** highly conductive copper(Cu)-mesh framework reduces electrode hydrogen evolution and increases electrode ***,the in situ-formed Cu-Zn nano-alloy stabilizes the Zn deposition *** a result,the GZn symmetrical cell presents a low overpotential of 49 mV after cycling for 1,200 h(0.2 mA∙cm^(-2)).In addition,GZn displays its potential application as a universal anode for Zn-ion capacitors and *** activated carbon||GZn Zn-ion capacitor delivers a stable cycling performance after 10,000 cycles at 5 A∙g^(−1) and MnO2||GZn Zn-ion batteries exhibit satisfactory cycle stability and excellent rate *** demonstrates that GZn appears to be a promising universal anode for Zn-ion capacitors and batteries.

关键词： cycling electrode conductive

Thermodynamic analysis of improvement of converter gas by injecting pulverized coal into vaporization cooling flue

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Journal of Iron and Steel Research International 2018年第1期25卷 65-71页

作者： Jian-an Zhou Xue-kai jiang Jian-bo Xie Hua Zhang Lei Li Bao Wang Hong-wei Ni State Key Laboratory of Refractories and Metallurgy WuhanUniversity of Science and Technology Wuhan 430081Hubei China Key Laboratory of Ferrous Metallurgy and ResourcesUtilization Ministry of Education Wuhan Universityof Science and Technology Wuhan 430081 Hubei China Guangxi Liuzhou Iron and Steel Group Co. Ltd.Liuzhou 545002 Guangxi China

In order to improve the calorific value and the recovery yield of converter gas during the steelmaking process, a novel and thermodynamically admissible process was proposed. This method involved injecting pulverized coal into the vaporization cooling flue of a converter, and the approach was developed based on an industrial 30 t converter. The effects of temperature, O2 content, and the volumetric ratio of CO to CO2 on the conversion of the mixed components of gas were analyzed using thermodynamic calculations. Furthermore, the effect of the injection rate on the quality and quantity of gas was investigated. The results show that the O2 and CO2 components of flue gas decrease as the injection rate increases, whereas the CO and H2 components synchronously increase. With the injection rate of 30 kg min-1, the 02 and CO2 components of the gas decreased by 64.12 and 41.19%, respectively, while the CO and H2 increased by 20.09 and 236.84%, respectively, and the recovery time of gas increased by 11.61%, compared to non-injection.

关键词： Converter Gas recovery Vaporization cooling flue CO2 Pulverized coal

Dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

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Journal of Advanced Ceramics 2022年第2期11卷 365-377页

作者： Lingwei YANG Xueren XIAO Liping LIU Jie LUO kai jiang Xinxing HAN Changhao ZHAO Jun ZHANG Guolin WANG Hypervelocity Aerodynamics Institute China Aerodynamics Research and Development CenterMianyang 621000China Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical UniversityXi’an 710072China Shandong Research and Design Institute of Industrial Ceramics Co.Ltd.Zibo 255000China

This work employed an inductively coupled plasma wind tunnel to study the dynamic oxidation mechanisms of carbon fiber reinforced SiC matrix composite(C_(f)/SiC)in high-enthalpy and high-speed *** results highlighted a transition of passive/active oxidations of SiC at 800–1600℃and 1–5 ***,the active oxidation led to the corrosion of the SiC coating and interruption of the SiO_(2) *** transition borders of active/passive oxidations were thus defined with respect to oxidation temperature and partial pressure of atomic O in the high-enthalpy and high-speed *** the transition and passive domains,the SiC dissipation was *** multiple dynamic oxidations of C_(f)/SiC in the domains,the SiO_(2) thickness was not monotonously increased due to the competing mechanisms of passive oxidation of SiC and dissipation of SiO_(2).In addition,the mechanical properties of the SiC coating/matrix and the C_(f)/SiC were maintained after long-term dynamic oxidations,which suggested an excellent thermal stability of C_(f)/SiC serving in thermal protection systems(TPSs)of reusable hypersonic vehicles.

关键词： thermal protection system(TPS) ceramic matrix composite oxidation mechanism plasma wind tunnel mechanical property

Synthesis of monodisperse crosslinked polystyrene microspheres

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Petroleum Science 2008年第4期5卷 375-378页

作者： jiang kai Chen Sheng-Li Dong Peng Liu Renxiao State Key Laboratory of Heavy Oil Processing School of Chemical Science ＆ Engineering China University of Petroleum Beijing 102249 China

Monodisperse crosslinked polystyrene （CPS） particles were prepared through the normal emulsion polymerization method by adding crosslinker--divinylbenzene （DVB） into the reaction system after polystyrene （PS） particles grew to -80% of the final size. When the amount of crosslinker DVB added was less than 6.17 wt% based on styrene, the prepared CPS particles were spherical and uniform and the size of the CPS particles could be predicted through the normal emulsion method. The glass transition temperature （Tg） of the prepared CPS particles was higher than that of un-crosslinked PS particles and, the more crosslinker that was added, the higher the Tg of CPS Particles. The prepared CPS particles had strong resistance to organic solvents.

关键词： Emulsion polymerization crosslinked polystyrene particle monodisperse particles