Qingdao Energy Institute made a series of research progress on biomass energy materials

Biomass materials have the advantages of abundant sources, renewable resources, and have important application prospects in the field of sustainable energy material development. Based on abundant seaweed polysaccharides, chitin and other biomass materials, research and development of high-performance energy materials have important ecological, economic and social benefits.

Recently, Cui Guanglei, head of the Bionic Energy and Energy Storage System Team of the Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, has made a series of new developments in the field of marine biomass energy materials research. The relevant results were published in the ACS Appl Mater Interfaces, J. Electrochem. Soc. ., Electrochim Acta, J Mater Chem and other magazines, and has a number of invention patents authorized.

Fabrication of composite power battery separators using low-cost non-woven processing technology using biomass cellulosic materials and temperature-resistant polymer materials (ACS Appl Mater Interfaces 2013, 5, 128-134.), compared to conventional polyolefin separators Material cellulose as raw material, low cost, green environmental protection. At the same time, due to its unique polarity and chemical and physical structure, the separator has good electrolyte wettability, high porosity and ionic conductivity, and has suitable mechanical strength and excellent high temperature resistance. The team integrated innovation through diaphragm material design and molding process, solved the key technical problems of power battery diaphragms, built a low-cost, high-performance power battery diaphragm industrialization technology system, and granted 3 invention patents in the field of material preparation and core equipment. (ZL201110147715.6, ZL201110147725.X, ZL201220602823.8).

The development of low-cost intrinsically flame-retardant composite diaphragm systems is of great significance for improving the safety performance of power batteries. The polysulfone amide/sodium alginate/silica composite separator developed by the team has high porosity and electrolyte absorption rate, excellent flame retardancy and high temperature resistance (J. Electrochem. Soc., 2013, 160 (6 ), A769-A774). The lithium-ion battery assembled with the polyarylsulfoneamide-based composite separator can be rapidly charged and discharged even when used at a temperature of 120 degrees Celsius. The polyarylsulfoneamide-based composite separator is particularly suitable for high-safety power lithium-ion batteries. This proprietary membrane technology will promote the development of China's high-end battery separator industry.

Oil-based binders (for example, polyvinylidene fluoride) are widely used in the production of lithium-ion battery pole pieces, but a large amount of dimethylpyrrolidone is used as a solvent in the slurry preparation process, which has a high production cost and also pollutes the environment. In addition, Young's modulus is low, brittleness is large, flexibility is not good, tensile strength is low, and the electrode sheet prepared by using the binder is prone to “flooding” phenomenon, and the electrode sheet is also prone to appear in the pole piece during charging and discharging. Sections and cracks caused by stress. The marine biomass materials such as seaweed polysaccharides and chitin have excellent adhesion properties, but their film forming properties are not good. The team developed a new type of high-performance marine biomass binder based on functional modification of marine biomass materials to improve film formation and electrochemical stability. The binder has a high elastic modulus, is economical and environment-friendly, and can withstand the expansion and contraction of the active material particles during electrode cycling to a certain extent, and is particularly suitable for silicon-based high energy density electrode materials and high-potential cathode materials. The development of highly stable water-based adhesive materials provides important raw materials and technical support for the green production process of lithium-powered batteries and plays an important supporting role in advancing the development of blue industrial clusters. At present, this research has applied for 4 invention patents.

Lithium hexafluorophosphate salt in traditional electrolytes has harsh preparation conditions, high cost, poor thermal stability, and extreme sensitivity to water. The team used biomass materials to design and synthesize new bio-based polymeric lithium borate salts (Electrochim Acta 2013, 92, 132-138.) with excellent heat resistance, high lithium ion transport number, and ionic conductivity. The development of a power battery provides a high-temperature, safe electrolyte system that greatly enhances the safety performance of the battery. The study has applied for 2 invention patents.

The team is based on the development of high-performance separators, adhesives, and electrolyte salts. It uses high-capacity metal nitride composites with good lithium intercalation properties as electrode materials, and uses advanced pre-intercalation lithium technology to optimize trace amounts in electrolytes. The composition of additives, supplemented by self-developed separators, reduces the internal resistance of the capacitors, improves the electrolyte/diaphragm interface stability, improves the cycling performance of supercapacitors, and builds supercapacitors with high energy density, and develops energy density comparable to that of lead-acid batteries. Environmentally-friendly energy storage batteries with excellent cost performance (J Mater Chem, 2012, 22, 24918; J. Mater Chem A, 2013, 1, 5949; ACS Nano, 2013, DOI: 10.1021/nn401402a). At present, the team is optimizing the structure of the capacitor device and hopes to develop a lithium ion capacitor energy storage device with superior performance. Research in this area has been awarded 4 patents for inventions (ZL200910226430.4, ZL201010104001.2, ZL201010104003.1, ZL201010108048.6).

The above research has obtained the Nano-pilot project of the Chinese Academy of Sciences, the “973” and “863” scientific and technological special projects of the Ministry of Science and Technology, the National Natural Science Foundation, and the support of companies for research on marine biomass energy materials.

Mass Flow Meter Batch Controller

Zhejaing Sealand Technology Co., Ltd. is a trustworthy manufacturer of Mass Flow Meter Batch Controller, Batch Controller, Controller, Register & Counter.

Mass Flow Meter Batch Controller, Batch Controller, Controller, Register, Counter

Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeters.com