Recently, the team of Professor Yu Yan of the University of Science and Technology of China, in cooperation with the German Mape Institute of Solid State, developed a room-temperature redox self-assembly method, successfully synthesized a three-dimensional nanostructure of a mixed-valence vanadium oxide, and applied the material. For high energy density lithium-ion battery cathode materials, it has achieved excellent electrochemical performance. The research results were published in the Nano Express. In recent years, vanadium oxide has been widely studied as a cathode material for lithium ion batteries because of its high specific capacity and abundant resources. Compared to traditional vanadium oxides (V2O5, VO2), vanadium oxide V6O13 with mixed valence states is rarely studied because of its relatively difficult synthesis. The latest research results show that the material V6O13 exhibits a metal characteristic at room temperature, and when it is used as a positive electrode material for a lithium ion battery, it can accept eight lithium ions (units), thereby exhibiting as high as 417 mAhg-1. Theoretical specific capacity and theoretical specific energy of 900 Wh kg-1. However, during the preparation process, due to the characteristics of vanadium having a mixed valence state, the controlled preparation of the material presents great challenges. In response to this problem, the researchers proposed a simple redox self-assembly method based on room temperature solution system, successfully achieved the controllable preparation of V6O13, and can achieve quantitative production. When used as a cathode material for lithium ion batteries, this one-dimensional nano-groove woven three-dimensional multi-level structure, its one-dimensional nano-cell has a high specific surface area, is conducive to the penetration of electrolyte, and can promote rapid lithium ion In addition to electron transport, and more importantly, the network structure of the three-dimensional mutual hinge can effectively suppress the agglomeration and pulverization of its one-dimensional unit, thereby exhibiting a specific energy of up to 780 Wh kg-1. This work shows important guiding significance for the research of oxide systems or other systems in the future, and provides new ideas for the design and preparation of high-performance lithium battery electrode materials. The above research work was supported by the “Years of Thousand Talents Program†of the Central Organization Department, the National Natural Science Foundation of China, the New Century Excellent Talents Program, and China University of Science and Technology. ,
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The installation is as follows.
1. Installation Steps
valve location into consideration;
a) Sensor stays away from mechanical vibration source, for example, pump. Use flexible
pipe to connect meter with pipeline if inevitable. The housing of meter must be standalone,
out of touch with any other device. There must be 3 times the size of sensor between 2
sensors if there are many flow meters on the same pipeline, to avoid resonance.
b) Do not install sensor on pipeline that easily expands with hot and contracts with cold,
especially near expansion joint, which leads to a worse stability.
c) Sensor stays away from industrial electromagnetic field, such as large generator and
transformer, better 5m at least. Such device influences the performance of drive coil and
pickoffs. Make sure magnetic field intensity less than 400A/m.
d) Sensor shall be installed on lower pipeline, to be easily full of fluid.
f) Build a sunshade if the meter is under direct solar radiation.
g) Keep the meter from corrosive liquid.
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a) Choose correct installation site, taking installation area, pipeline, transmitter location &
b) Install the meter according to direction mark on sensor;
c) Install the sensor & transmitter on pipeline;
d) Connect transmitter & sensor with 9-pin cable;
e) Start.
e) Make sure Ex-mark meet application requirements if in hazardous area.