introduction

At present, lithium-ion batteries are widely used in various portable electronic devices and electric vehicles. However, with the continuous development of these devices, lithium-ion batteries are gradually unable to meet the development needs of the society. In order to further expand the application prospects of lithium-ion batteries, various systems of batteries have attracted the attention of researchers. Among them, lithium-sulfur batteries are receiving increasing attention. A lithium-sulfur battery is a lithium battery in which sulfur element is used as a positive electrode material and metal lithium is used as a negative electrode material. Elemental sulfur is abundant in the earth, with low price and environmental friendliness. Lithium-sulfur batteries using sulfur as a positive electrode material have higher theoretical specific capacities and theoretical specific energy of batteries, reaching 1675m Ah/g and 2600Wh/kg, respectively, which is almost the theoretical ratio of conventional positive electrode materials such as transition metal oxides and phosphate materials. 10 times the capacity; In addition, sulfur also has the advantages of low price, environmental friendliness, etc. It is a very promising lithium battery.

Achievements

Recently, Prof. Dong Quanfeng from School of Chemistry and Chemical Engineering of Xiamen University and Professor Leroy Cronin from the University of Glasgow in the United Kingdom have made new progress in the research of lithium-sulfur batteries. Related results include "Strategies to Explore and Develop Reversible Redox Reactions of Li-S in Electrode Architectures using "Silver-Polyoxometalate Clusters" was published on JACS (DOI: 10.1021/jacs.8b0041). Prior to this, Prof. Dong Quanfeng's research group conducted a systematic study of lithium-sulfur battery sulfur composite cathode materials. The reaction mechanism of lithium-sulfur batteries was explored through in-situ Raman technology combined with theoretical calculations, confirming that the nitrogen-doped modification of the sulfur-bearing base material can achieve a complete charge-discharge cycle of elemental sulfur as the positive electrode active material (Chem. Mater., 2015, 27, 2048?2055); Afterwards, the Co-catalytic effect of Co-N was successfully applied to the redox process of S for the first time, and the concept of “multifunctional, dual catalytic” was proposed (EES, 2016, 9, 1998-2004); Based on the improvement of the sulfur content of the composite positive electrode material, the research team for the first time prepared non-carbon mesoporous Co4N microspheres and achieved a sulfur loading of up to 95% (ACS Nano, 2017, 11, 6031-6039).

Transition metal polyacid oxides (POMs) are a type of nanocluster material with a reversible multi-electron reaction characteristic, which is visually called an “electronic sponge” because it can reversibly store ions and electrons. The feasibility of having a higher specific energy storage material. In this study, for the first time, polyoxometalate molecular clusters were used as positive electrode materials for lithium-sulfur batteries. This material (K3[H3AgIPW11O39]) has both Lewis acid and Lewis base sites, and thus has the function of double-site adsorption of polysulfides. The efficient control of the sulfur electrochemical reaction process can be achieved. The experimental results and DFT theoretical calculations show that the Ag(I) heterometal ions in the framework structure of polyanion can regulate the adsorption of polysulfide in the whole system and the adsorption of lithium ions at the terminal oxygen atom. The lithium-sulfur battery prepared with it as a skeleton material exhibits excellent electrochemical performance.

Graphic guide

figure 1. POMs absorb Li2S produced by lithium-sulfur battery system

figure 2. Calculated Adsorption Gibbs Free Energy Difference (ΔGads) and Li2Sn (n=8,6,4) with PW12O40 and K3[H3AgIPW11O39] Clusters

Overflow Ball Mill

Technical parameters:

MQY32X90 3200 9000 64. 2 18. 3 106. 6 1250 150 18. 5X7. 3X6 173
MQY34X45 3400 4500 37 18. 4 74. 6 800 167 11. 5X7X6. 1 129. 8
MQY34X56 3400 5600 45. 8 17. 9 84. 3 1120 985 16. 7X7. 6X6. 3
MQY36X45 3600 4500 41.4 17. 25 76 1000 167 13X7. 3X6. 3 144. 1
MQY36X50 3600 5000 46. 7 17. 5 85. 96 1250 167 15X7. 6X6. 2 150
MQY36X50 3600 5000 46. 7 17. 3 85. 86 center 1250 429 23X1. 6X6. 3 176
MQY36X56 3600 5600 55. 4 17. 76 106. 3 edge 1250 750 14. 4X8X6. 3 159. 7
MQY36X60 3600 6000 55. 7 17. 3 102. 5 center 1250 429 21X4. 6X6. 3 138.73
MQY36X60 3600 6000 54 17. 3 102 edge 1250 167 15. 6X8. 3X6.3 162. 7
MQY36X6I 3600 6100 55. 36 17. 76 106. 3 1200 980 15. 8X8. 5X6. 2 164. 1  
MQY36X85 3600 8500 79 17. 4 131 1800 743 20X8. 2X7. 1 251.89
MQY36X90 3600 9000 83. 5 17. 4 138 center 1800 743 28X4. 6X5. 6 286
MQY38X67 3800 6700 70 16. 5 130 edge 1400 743 19X8. 2X7. 1 185. 2
MQY40X60 4000 6000 69. 8 16 126 1500 200 17. 4X9. 5X7. 6  203. 5
MQYI0X67 4000 6700 78 16 136. 3 1600 200 15. 6X9. 6X7. 3 206. 2
MQY40X135 4000 13500 155 16 233 3300 200 23X10X4. 9 343 coal water slurry with
MQY13X61 4270 6100 80 15.67 144 1750 200 14X10X7. 7 215.3
MQY50X64 5030 6408 120 14. .1 251 2600 200 14. 6X11X9. 1 318. 5
MQY50X83 5030 8300 152. 3 14. 4 266 3300 200 22X10. 5X9 402. 6
MQY55X65 5500 6500 143. 3 13. 8 264 3400 200 18. 5X9. 8X8. 9 451. 5
MQY55X85 5500 8500 187. 4 13. 8 335 4500 200 20. 5X12X9. 8



 Overflow Ball Mill

Product introduction:

Specifications from D Φ 1.5x3.0 ~ phi 5.5x8.5m, the effective volume for a variety of specifications of various configurations of 5.7-194.3

Scope of application:

Widely used in ferrous and non-ferrous metal mining, non-metallic mines, building materials, water conservancy projects and other industries, the grinding of various rocks and minerals.

Overflow type ball mill grinding for two stage grinding second stage grinding and intermediate products; lattice type ball mill used in the first stage grinding;
Rod mill has selective grinding effects, commonly used in the product size uniformity, particle crushing places less, such as coal water slurry system in water conservancy engineering of artificial sand making and chemical industry production.

Company profile:

QM

workshop show
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Factory Equipments

34565


Luoyang Hong Xin Heavy Co., LTD. is located in Luoyang Xin'an Industrial Park, Luoyang Hongxin Heavy Machinery Co., Ltd is an enterprise featured with industrial designing, processing and manufacturing, which is qualified for import-export trade. Covering an area of 15,000 square meters and holding an annual production value of 80 million RMB, the company of 20 million RMB registered capital has total 100 staff members, among which there are 20 engineering technicians owning senior and medium professional titles and 40 intermediate and senior technicians capable of product designing and developing.

Hongxin is dedicated to produce reducers, hoists, crushers, Ball Grinding Mills and the equipments of screening, coal washing, metallurgy and cement, and replacement parts. Meanwhile, we provide the perform maintenance service for various series of equipments. There are 52 large-scale equipments applied into the manufacturing process, such as T200 CNC floor boring and milling machine, YK 73125 CNC molding gear grinding machine, YK322B CNC molding gear grinding machine, Y3200 gear hobbing machine, Y1600 CNC gear sharper, 4m vertical lathe, 6.3m CNC vertical lathe, T110 CNC boring machine, and 52 middle-sized productive and assistive equipments, which integrate strong manufacturing and processing capability with complete managing system of production and technology, quality management system and comprehensive testing measures.

Certificate:

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Contacts:

106718374499343243154011831859587562872046421076663174600115365437611262346850895214058650



Overflow Ball Mill

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Luoyang Hongxin Heavy Machinery CO., TLD. , https://www.hxreducer.com