Abstract:Adding additives to the electrolyte is an effective and simple method to improve the electrochemical performance of zinc anodes. In this paper, 2-mercaptosuccinic acid (MA) is introduced into the ZnSO4 electrolyte as an additive to improve the zinc anode performance. Electrochemical tests show that the addition of MA additive can reduce the charge transfer resistance of the interface, reduce the occurrence of side reactions such as hydrogen evolution and corrosion, reduce the nucleation overpotential, which is beneficial to the uniform nucleation of zinc, constrain the diffusion of zinc ions and accelerate the migration of zinc ions, which is beneficial to the uniform deposition of zinc and inhibits dendrite growth. Through XRD and SEM characterization, it was found that there was no obvious by-product generation on the surface of the zinc anode, and the zinc foil was protected. The Zn||Zn batteries containing MA additive electrolyte shows excellent long-term cycle performance. It can cycle stably for 1574 h under the conditions of 5 mA/cm2, 1 mAh/cm2, and has a large current density and area of 8 mA/cm2, 5 mAh/cm2. It can cycle stably for 546 hours even if the capacity is high. The polarization voltage during the cycle is low, showing excellent cycle stability. This shows that it is feasible to choose 2-mercaptosuccinic acid (MA) as an electrolyte additive to improve the stability of the zinc anode.

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	1. Study on Optimization of Zinc Anode Performance with 2-mercaptosuccinic Acid Electrolyte Additive
	XU Lili,XING Bin
	Chemical Engineering 08 April 2024
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	Abstract:Adding additives to the electrolyte is an effective and simple method to improve the electrochemical performance of zinc anodes. In this paper, 2-mercaptosuccinic acid (MA) is introduced into the ZnSO4 electrolyte as an additive to improve the zinc anode performance. Electrochemical tests show that the addition of MA additive can reduce the charge transfer resistance of the interface, reduce the occurrence of side reactions such as hydrogen evolution and corrosion, reduce the nucleation overpotential, which is beneficial to the uniform nucleation of zinc, constrain the diffusion of zinc ions and accelerate the migration of zinc ions, which is beneficial to the uniform deposition of zinc and inhibits dendrite growth. Through XRD and SEM characterization, it was found that there was no obvious by-product generation on the surface of the zinc anode, and the zinc foil was protected. The Zn\|\|Zn batteries containing MA additive electrolyte shows excellent long-term cycle performance. It can cycle stably for 1574 h under the conditions of 5 mA/cm2, 1 mAh/cm2, and has a large current density and area of 8 mA/cm2, 5 mAh/cm2. It can cycle stably for 546 hours even if the capacity is high. The polarization voltage during the cycle is low, showing excellent cycle stability. This shows that it is feasible to choose 2-mercaptosuccinic acid (MA) as an electrolyte additive to improve the stability of the zinc anode.
	TO cite this article:XU Lili,XING Bin. Study on Optimization of Zinc Anode Performance with 2-mercaptosuccinic Acid Electrolyte Additive[OL].[ 8 April 2024] http://en.paper.edu.cn/en_releasepaper/content/4763269


	2. Study on Electrochemical Activation and Electrochemical Properties of Manganese Dioxide
	HU Xinju,ZHAO Li,XIANG Bin
	Chemical Engineering 07 April 2023
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	Abstract:Preparation of nanorod structures using a simple hydrothermal method α-MnO2, and then apply a certain negative voltage to 1 M LiOH, 1 M NaOH and 1 M KOH alkaline electrolytes to prepare electrochemically activated α-MnO2。 The results show that under the activation of negative voltage, alkali metal ions in the electrolyte will be embedded α- In the lattice of MnO2, thereby improving the electrical conductivity of the material. In addition, the embedded alkali metal ions can increase α- The lattice spacing of MnO2 is conducive to full contact between the active substance and the electrolyte. In electrochemical testing, the optimal activation voltage for the three electrolyte solutions of 1 M LiOH, 1 M NaOH and 1 M KOH is -1.2 V. At this activation voltage, the specific capacitance after activation in the three solutions was 155.0 F g-1, 148.4 F g-1, and 140.8 F g-1, respectively, which increased by 210%, 197%, and 182% compared to the pure sample, respectively. At the same time, the cycle performance was improved from 74.6% of the pure sample to 96.9%, 89.4%, and 91.9% of the activated sample. After activation, the magnification performance of the sample is also improved compared to the pure sample. This indicates that electrochemical activation is feasible for the modification of manganese dioxide.????
	TO cite this article:HU Xinju,ZHAO Li,XIANG Bin. Study on Electrochemical Activation and Electrochemical Properties of Manganese Dioxide[OL].[ 7 April 2023] http://en.paper.edu.cn/en_releasepaper/content/4760026

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	3. Sulfur doped cobalt hydroxide electrode for high-performance supercapacitors
	ZHAO Li,HU Xinju,XIANG Bin
	Chemical Engineering 02 April 2023
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	Abstract:Sulfur-doped Co(OH)2 layered nano-sheet electrode materials were prepared by a simple one-step electrodeposition method using three substances, namely thiourea (TU), thioacetamide (TAA), and N-methylthiourea (N-MTU), as sulfur sources. The morphology, crystallinity, and electronic structure of Co(OH)2 materials changed with different sulfur source doping. Three-electrode electrochemical testing in 2 M KOH showed that the electrochemical performance of the materials improved significantly after being doped with the three kinds of sulfur sources. Among them, the material doped with TU as the sulfur source exhibited the highest specific capacitance (1687.27 F g-1 at 1 A g-1), while the materials doped with TAA and N-MTU as the sulfur sources had specific capacitances of 1478.18 F g-1 and 1007.27 F g-1, respectively. Compared with pure Co(OH)2 (678.18 F g-1 at 1 A g-1), the specific capacitance was significantly improved. The S-Co(OH)2 sample doped with TU was used as the positive electrode and FeOOH@rGO was used as the negative electrode to form an STU-Co(OH)2//FeOOH@rGO ASC, which achieved a high energy density of 61.1 Wh kg-1 at a power density of 800 W kg-1 and still maintained an 83% capacity retention rate after 5000 cycles, demonstrating good practical application ability.
	TO cite this article:ZHAO Li,HU Xinju,XIANG Bin. Sulfur doped cobalt hydroxide electrode for high-performance supercapacitors[OL].[ 2 April 2023] http://en.paper.edu.cn/en_releasepaper/content/4760160


	4. Doping-driven electronic structure and conductivity modification of nickel sulfide
	XIAO Zhenyun,ZOU Xuefeng,XIANG bin
	Chemical Engineering 11 April 2021
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	Abstract:The lack of electrical conductivity limits the electrochemical kinetic rate of the electrode material, resulting in the inability to reach its theoretical capacity. A facile method was adopted to improve intrinsic conductivity of hybrid nickel sulfide, with the usage of doping of transitional metal atoms Co, Mn and Ag. Through the introduction of heteroatoms, the electronic structure of the electrode material is modified and the electrical conductivity is significantly improved, thus enhancing its electrochemical performance. The improvement of conductivity are attributed to the forming of intermediate bands of transition metal and redistribution of electrons, and the result was demonstrated by experimental and density functional theory (DFT) calculations. As a result, the Co doped nickel sulfide with a 0.5% doping amount reach the highest specific capacitance of 2874 F/g at 1 A/g, increasing specific capacitance of 653 F/g as 29.4% of the specific capacity of non-doped nickel sulfide. The Co doped nickel sulfide also exhibits remarkable cycling stability compared with non-doped nickel sulfide. The assembled 2% Co-doped nickel sulfide//rGO, 0.5% Mn-doped nickel sulfide//rGO and 0.5% Ag-doped nickel sulfide//rGO asymmetric supercapacitors show a specific energy density of 36.6, 36.1 and 36.0 Wh/Kg at a power density of 800 Wh/Kg. This study will be a useful insight for fabrication of high performance pseudocapacitive materials.
	TO cite this article:XIAO Zhenyun,ZOU Xuefeng,XIANG bin. Doping-driven electronic structure and conductivity modification of nickel sulfide[OL].[11 April 2021] http://en.paper.edu.cn/en_releasepaper/content/4754605


	5. Research on Large Energy Integration and Heat Exchange Network Design Optimization of Oxidative Dehydrogenation Synthesis of Isoamylene
	Cheng Chen,Shi jianjun,Zuo Hui,Cao Xue,li Chaoxu,He Mingjie
	Chemical Engineering 27 September 2020
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	Abstract:The project adopts oxidative dehydrogenation method to synthesize isoamylene, and uses rectification tower and multi-stage separator to separate and purify finally to obtain chemical purity isoamylene main product and cyclopentane by-product, with an output of 198,000 tons/year. In this paper, we use Aspen Energy Analyzer V11.0 software to design and optimize the energy integration and heat exchange network of the overall process, looking for the most energy-saving measures to minimize energy consumption. By adopting two-stage organic Rankine recycling technology and heat pump technology. Among them, the two-stage organic Rankine cycle technology uses the hydrogen cold source containing high-quality cold energy separated by the hydrogen separation tower, and saves the amount of public works through heat exchange between the cold source and the river water in the river near the site. So as to achieve the purpose of energy saving. The heat pump technology makes full use of the rectification tower with a small difference between the top and the bottom of the tower. By changing the temperature of the steam, it is possible to exchange heat for streams that could not exchange heat, thereby increasing the ratio of recoverable energy and achieving a greater degree Energy saving. Through this optimization measure, the converted energy saving is 99.74MW, which requires 64.48MW of cold utilities and 35.26MW of heat utilities, which achieves a greater degree of energy recovery.
	TO cite this article:Cheng Chen,Shi jianjun,Zuo Hui, et al. Research on Large Energy Integration and Heat Exchange Network Design Optimization of Oxidative Dehydrogenation Synthesis of Isoamylene[OL].[27 September 2020] http://en.paper.edu.cn/en_releasepaper/content/4752876


	6. Recovery of excess cold energy from low-temperature hydrogen based on ASPEN PLUS two-stage Organic Rankine Cycling technology
	Cheng Chen,Shi Jianjun,Zu Runyin,Meng Wangbin,Ji Ke
	Chemical Engineering 07 September 2020
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	Abstract:Energy has always been an eternal topic of human development. Hydrogen energy has unparalleled advantages such as large reserves, high heating value, and zero pollution. It can well solve the urgent problems of human society\'s energy shortage and environmental pollution. The propylene separated from carbon pentanes in the chemical plant of this project is selected as the working fluid of the organic Rankine cycle, and the process model established by ASPE PLUS software simulates and optimizes the problem of low-temperature hydrogen recovery in the chemical plant. In this project, 4 heat exchangers, 2 pumps, and 2 steam turbines are used to exchange cold and heat energy with the river near the plant to recover the cold energy of hydrogen, and generate 14.48kW of electricity to drive the generator to rotate. It has guiding significance for the recovery of low temperature cold source and process optimization in chemical plants.
	TO cite this article:Cheng Chen,Shi Jianjun,Zu Runyin, et al. Recovery of excess cold energy from low-temperature hydrogen based on ASPEN PLUS two-stage Organic Rankine Cycling technology[OL].[ 7 September 2020] http://en.paper.edu.cn/en_releasepaper/content/4752771


	7. Self-assembled graphene films with various thicknesses as supercapacitor electrodes
	ZHU Jianbo,CHEN Wenjing,GUAN Sinan,ZHAO Xiayi,CHEN Xueye,ZU Jiasheng
	Chemical Engineering 03 June 2020
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	Abstract:In this paper,Graphene have attracted considerable attention as the supercapacitor material due to its high electronic conductivity and large ion-accessible surface area. Herein, self-assembled reduced grapheneoxide (rGO) films with various controllable thicknesses and mass loadings are facilely prepared via a scalable vacuum filtration method. The rGO film electrodes with considerable mass loading of 6.7 mg cm-2 exhibit high specific capacitance of 173.4 F g-1 (1.16 F cm-2) at 1 A g-1 in 6 M KOH aqueous electrolyte, indicating the high utilization of the rGO active material. Moreover, quasi-solid supercapacitors fabricated with the rGO film electrode and PVA/KOH gel electrolyte shows a high capacitance of 1.03 F cm-2 and a large energy density of 0.073 mWh cm-2 at the power density of 3.3 mW cm-2, as well as excellent cycling stability of 85.6% retention after 10000 cycles. Such remarkable performance suggests that the rGO films are promising electrode materials for supercapacitor application.
	TO cite this article:ZHU Jianbo,CHEN Wenjing,GUAN Sinan, et al. Self-assembled graphene films with various thicknesses as supercapacitor electrodes[OL].[ 3 June 2020] http://en.paper.edu.cn/en_releasepaper/content/4752297


	8. Research on Reactor Design in Propane Dehydrogenation Process
	TANG Rongqing,YANG Manxia,YANG Lina,LIANG Tingting,JIN Mingxin
	Chemical Engineering 05 March 2020
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	Abstract:The success of chemical technology process development depends to a large extent on the control level and control ability of the temperature, concentration, residence time and temperature distribution of the fluid in the reactor, and the distribution of residence time. The research project of the propane dehydrogenation process is mainly based on the Catofin process, and the Catofin process is improved by combining the catalyst and operating conditions of the Oleflex process. The main reactors involved in this process are propane dehydrogenation reactors. This paper uses Aspen Plus, Comsol, SW6 and other computer software to select the structure of its core equipment, and details the manufacturing process of the reactor to determine the reaction The volume and approximate structure of the reactor achieve the control requirements of chemical process parameters such as temperature distribution, concentration distribution, and reaction time, so that product quality and performance can be guaranteed. Finally, the reactor design specification is listed in a table.
	TO cite this article:TANG Rongqing,YANG Manxia,YANG Lina, et al. Research on Reactor Design in Propane Dehydrogenation Process[OL].[ 5 March 2020] http://en.paper.edu.cn/en_releasepaper/content/4751033


	9. Study on Energy Integration and Heat Exchange Network Design Optimization of Vinyl Acetate Synthesis from Natural Gas Acetylene Process
	TANG Rongqing,ZENG Weizhao,YANG Manxia,YANG Lina,GAO Jianmin
	Chemical Engineering 29 February 2020
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	Abstract:This research project uses acetylene and acetic acid as raw materials, zinc acetate-activated carbon as catalyst, and uses natural gas acetylene process to produce 330,000 tons every year of vinyl acetate products. In this paper, double-effect rectification technology and heat pump technology are used to design and optimize the system's energy integration and heat exchange network. Through the analysis of Aspen Energy Analyzer V10.0 software results, it is possible to find possible energy-saving measures to minimize industrial production costs. Double-effect distillation technology is used on the vinyl acetate distillation column, and the high-grade heat source at the top of the high-pressure distillation column is used to exchange heat with the re-boiling stream at the bottom of the atmospheric distillation column to save the amount of public works At the same time, the number of heat exchangers is reduced, thereby achieving the purpose of energy saving. The use of heat pump technology in the acetic acid distillation column to achieve the purpose of making full use of the energy at the top of the column, by changing the temperature of the steam to increase the possibility of heat exchange in the stream that could not be exchanged, thereby increasing the ratio of recoverable energy To achieve greater energy savings.
	TO cite this article:TANG Rongqing,ZENG Weizhao,YANG Manxia, et al. Study on Energy Integration and Heat Exchange Network Design Optimization of Vinyl Acetate Synthesis from Natural Gas Acetylene Process[OL].[29 February 2020] http://en.paper.edu.cn/en_releasepaper/content/4750979


	10. Synthesis of unsaturated cycloexanone formaldehyde resins and their UV-curing behavior with thiols
	Xu Peng,Li Chaofeng,Chang Xinwei,Zhang Yanwu
	Chemical Engineering 27 March 2019
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	Abstract:The water-soluble cyclohexanone formaldehyde resins (CFR) are synthesized using the rehydrated magnesium-aluminum hydrotalcite as the catalyst and double bonds are introduced by capping the chain ends with 5-norbornene-2,3-dicarboxylic anhydride. Through monitoring the conversion of double bonds with FT-IR, the UV-curing behavior of unsaturated CFR in the presence of pentaerythritol tetra (3-mercaptopropionate) is studied. The results show that the conversion of double bonds can reach to 64.1% at 0.66 mW/cm2 of UV light intensity when the molar ratio of double bonds to sulfhydryl groups is 1:1 in the presence of benzoin dimethyl ether (1% of molar amount of double bonds). The UV-curing kinetics conforms to the diffusion control model similar to the thermo-curing model of amine-epoxy.
	TO cite this article:Xu Peng,Li Chaofeng,Chang Xinwei, et al. Synthesis of unsaturated cycloexanone formaldehyde resins and their UV-curing behavior with thiols[OL].[27 March 2019] http://en.paper.edu.cn/en_releasepaper/content/4748131

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