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A pseudocapacitive molecule-induced strategy to construct flexible high-performance asymmetric supercapacitors

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1208-1220 doi: 10.1007/s11705-023-2304-1

Abstract: The combination of high-voltage windows and bending stability remains a challenge for supercapacitors. Here, we present an “advantage-complementary strategy” using sodium lignosulfonate as a pseudocapacitive molecule to regulate the spatial stacking pattern of graphene oxide and the interfacial architectures of graphene oxide and polyaniline. Flexible and sustainable sodium lignosulfonate-based electrodes are successfully developed, showing perfect bending stability and high electronic conductivity and specific capacitance (521 F·g−1 at 0.5 A·g–1). Due to the resulting rational interfacial structure and stable ion-electron transport, the asymmetric supercapacitors provide a wide voltage window reaching 1.7 V, outstanding bending stability and high energy-power density of 83.87 Wh·kg–1 at 3.4 kW·kg–1. These properties are superior to other reported cases of asymmetric energy enrichment. The synergistic strategy of sodium lignosulfonate on graphene oxide and polyaniline is undoubtedly beneficial to advance the process for the construction of green flexible supercapacitors with remarkably wide voltage windows and excellent bending stability.

Keywords： molecular synergy     pseudocapacitive lignosulfonate     flexible electronic devices     asymmetric supercapacitor     wide voltage windows    

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Cystine-assisted accumulation of gold nanoparticles on ZnO to construct a sensitive surface-enhanced

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 15-23 doi: 10.1007/s11705-022-2177-8

Abstract: Recently, various semiconductor/metal composites have been developed to fabricate surface-enhanced Raman spectroscopy substrates. However, low metal loading on semiconductors is still a challenge. In this study, cystine was introduced to increase the accumulation of gold nanoparticles on zinc oxide, owing to the biomineralization property of cystine. Morphological analysis revealed that the obtained ZnO/Au/cystine composite not only had a higher metal loading but also formed a porous structure, which is beneficial for Raman performance. Compared with ZnO/Au, the ZnO/Au/cystine substrate displayed a 40-fold enhancement in the Raman signal and a lower limit of detection (10–11 mol·L−1) in the detection of rhodamine 6G. Moreover, the substrate has favorable homogeneity and stability. Finally, ZnO/Au/cystine displayed excellent performance toward crystal violet and methylene blue in a test based on river water samples. This study provided a promising method to fabricate sensitive semiconductor/noble metal-based surface-enhanced Raman spectroscopy substrates for Raman detection.

Keywords： biomineralization     cystine     semiconductor/metal composite     SERS detection     Raman detection    

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Understand and construct Beidou

Xu Qifeng

Strategic Study of CAE 2014, Volume 16, Issue 8,   Pages 26-32

Abstract:

This paper indicates that the development of satellite navigation system should correspond to defense strategy and equipment capacity, and a regional navigation system covering neighboring countries and the western Pacific is able to meet the recent military and civilian demands. The adverse conditions of constructing satellite navigation system in our country are analyzed and satellite constellation of avoiding adverse conditions is designed.

Keywords： system     regional augmentationsatellite navigation system     satellite constellation design     regional navigation    

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Construct Agro-ecological Project, Control and Prevent Surface Source Pollution of Lakes

Bian Yousheng

Strategic Study of CAE 2001, Volume 3, Issue 5,   Pages 17-21

Abstract:

This paper, from the view point of ecology, thoroughly analyses the surface source pollution of lakes, points out the crux of lake surface source pollution is the issue of resource utilization. So that the author suggests that in lake areas and lake water resource regions the construction of agricultural ecological projects should be carried out so as to reduce resource consumption and minimize pollutant discharge thus attain the goal of lake surface source pollution control and prevention. This paper also introduces the general procedures and major construction research contents of the agro-ecological project in Liuminying Village, Beijing and the large-scale eco-farming construction in Shengli Oil Field, and particularly introduces the significant role of agro-ecolog-ical construction project in economic development, environmental improvement, reducing of fertilizer and pesticide consumption, soil pollution elimination, control and prevention of surface source pollution.

Keywords： agro-ecological project     surface source pollution     fertilizer     pesticide    

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Key tunneling technology and configuring big machines in Qingdao Jiaozhouwan subsea tunnel

Ma Dong,Tan Zhongsheng

Strategic Study of CAE 2009, Volume 11, Issue 7,   Pages 45-52

Abstract:

Qingdao Jiaozhouwan tunnel is 7 800 m, and subsea tunnel is 3 950 m. There are 2 main traffic tunnels and 1 serving tunnel. Accessorial tunnel passing in or out the main traffic tunnel is founded at 2 000 m part from gate in Qingdao. Space between the center lines of the 2 main traffic subsea tunnesl is 55 m. The section is oblong, width is 16 m, and height is 12 m. The tunnel is through slightly weathering granite, dolerite and andesite. Its vertical section is "V"  slope. The maximum seawater depth is 42 m and the minimal rock cover depth is 30 m.The key tunneling technology and configuring big machines of drilling and blast for constructing Qingdao Jiaozhouwan subsea tunnel were discussed in this thesis.

Keywords： Jiaozhouwan subsea tunnel     drilling & blast     construct     configuring big machines    

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The construct technology of tunnel and underground engineering in China

Wang Mengshu,Tan Zhongsheng

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 4-10

Abstract:

This paper mainly introduced the design theory and method of Chinese tunnel and underground engineering, construction technique of drill blast method, the shield tunnel construction technique and TBM(tunnel boring machine) construction technique and so on,and pointed out the research direction of Chinese tunnel and underground engineering from now on, including: the long tunnel's construction technology of great burying depth, the urban underground space plan, dynamic design of the tunnel and underground engineering as well as methods to reduce the building cost of projects and so on.

Keywords： tunnel     underground engineering     design theory     drill-blast technique     shield tunnelling and TBM    

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Enhace Independent Innovation Ablity of Paper Industry,Construct Innovation System of Paper Technology

Zhang Dengchun,Weng Peifen

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 80-86

Abstract:

Based on steady state incompressible Reynolds-averaged Navier-Stokes equation,  turbulence model,  the three-dimension airflow and concentration fields in passenger car are calculated numerically.  Regarding passengers as cubes and the exhalant CO2 as representative contaminant respectively,  the airflow and concentration distributions are investigated in non-empty state.  The results show that existing sew supply modes make the airflow distribution homogeneous except for the ends.  Body heat and solar radiation have much influence on airflow and temperature fields.  The air distribution in occupied passenger car differs from that in empty one.  The heat flux from body heat and solar radiation produces a much big temperature gradient in occupied passenger car.  The concentration is low in gangway zone while high in seat zone with crowded passengers.  The concentration in middle section is higher than that in end section and contaminant gathers in respiratory region,  and the polluted air can´t be exchanged effectively in seat zone,  which is disadvantageous to air quality in passenger car.

Keywords： passenger car     turbulence model     airflow field     concentration field     computational fluid dynamics    

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Application of Spartina alterniflora on Blow-fill-construct Sea Wall Engineering

Cao Dazheng,Wang Yinsheng,Zhang Dongran,Gu Lijun,Tang Tinggui

Strategic Study of CAE 2005, Volume 7, Issue 7,   Pages 14-23

Abstract: As an important component of blow - fill-construct sea wall engineering, erosion of tide and stormy waves

Keywords： Spartina alterniflora Loisel     sea wall     protecting slopes by plants     slowing the current and eliminating the wave     immobilizing the soil    

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Title Author Date Type Operation

A pseudocapacitive molecule-induced strategy to construct flexible high-performance asymmetric supercapacitors

Journal Article

Cystine-assisted accumulation of gold nanoparticles on ZnO to construct a sensitive surface-enhanced

Journal Article

Understand and construct Beidou

Xu Qifeng

Journal Article

Construct Agro-ecological Project, Control and Prevent Surface Source Pollution of Lakes

Bian Yousheng

Journal Article

Key tunneling technology and configuring big machines in Qingdao Jiaozhouwan subsea tunnel

Ma Dong,Tan Zhongsheng

Journal Article

The construct technology of tunnel and underground engineering in China

Wang Mengshu,Tan Zhongsheng

Journal Article

Enhace Independent Innovation Ablity of Paper Industry,Construct Innovation System of Paper Technology

Zhang Dengchun,Weng Peifen

Journal Article

Application of Spartina alterniflora on Blow-fill-construct Sea Wall Engineering

Cao Dazheng,Wang Yinsheng,Zhang Dongran,Gu Lijun,Tang Tinggui

Journal Article