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	1. 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


	2. 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


	3. 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


	4. 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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