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"As long as the cost of a coy, we can handle the problem of the mobile phone explosion. "Southwestern Petroleum University 2013 Materials Engineering and Sciences New Energy Materials and Device Professional Students Zhong Xuepeng is full of confidence, because he led the" Natural Tricolor Cellulose Lithium Ion Battery Sea "project team has mastered to solve the current lithium ion Core technology of battery explosion. With this technology, the team also successfully promoted the second year of my country's "Internet +" College Students Innovation and Entrepreneurship Competition, and won the Silver Award.
The story is from 2015. At that time, the students of the School of Materials Engineering and Sciences were officially formally formally formally formally formally formal, and the project teams related to the School of Electromechanical Engineering and the School of Economics, began to prepare for my country's "Internet +" College Students Innovation and Entrepreneurship Competition. National Finals.
But with the arrival of the graduation, some members have gradually leaving the school, so that the team instantly lost the direction. "At this time, the team's backbone Chen Zemin came forward. In order to prepare the material of the training camp, he is three days and three nights living in the laboratory, which also infects other small partners, and the heart is agglomerated together.
"Team member Song Alican recalls. "To ensure the safety of lithium-ion batteries, the use of key material separators in the battery is to close. According to media reports, we decompose mobile phone explosion should be due to thinning membranes.
Zhong Xuepeng said. In order to supply more energy in smaller volume, the manufacturer always wants to extrud the space occupied by the auxiliary material, give the battery "slimming", which buried hidden dangers for the safety of lithium-ion batteries. Therefore, let the lithium ion battery are "slim" and "safe", the diaphragm technology is the key.
What kind of material chooses to do diaphragm to become a team's top handling problem. "The process of this search seems to look for tungsten silk when Edison invented the lamp, and it is suffering from suffering. Zhong Xuepeng said.
The team has found dozens of materials, studied for half a year, repeated comparison, screening, fusion, and test results are not ideal. Just when the test is stagnant, one day, Chen Zemin wrote a summary report accidentally knocked over the ink bottle, and the ink instantly soaked the entire report. He suddenly realized that the reason why the lithium-ion battery exploded is because the diaphragm cannot effectively absorb electrolyte.
"Since the paper absorbs water, can we use the raw material of the paper to do the diaphragm?" Chen Zemin, this whimsy "save" the whole team. After receiving a large amount of information, the team found that there is no reference to the literature, and the command teacher who is far from the United States to visit scholars. Huang Yun for help.
Huang Yun encourages everyone to say: "Since no one studies, it explains its research value. "After getting the support of the teacher, the team is reorganized, and then start again. "Blocking the road" can be placed in front of the team, so how do you want to dissolve the lignocellulose in the water? How to make a film, how to improve performance, etc.
"Optical temperature detection, we have made no tens of thousands of trials, staying up late into home, in order to grasp the progress, even live in the laboratory, spend 6 months, we master the optimal temperature of the film. Chen Zemin said. In the end, after more than two years of development, the world's first lithium-ion battery diaphragm made from natural lignocellulose finally was born.
"After performance detection, compared with the products made by the most advanced three diaphragm companies in the world, the natural wood cellulose lithium-ion battery diaphragm has the advantages of green environmental protection, efficient and safe process, low cost, lithium Ion battery diaphragm processing cost as long as one coy. Chen Zemin said. "Currently, we use the school's technology park platform, which is more in-depth development of the diaphragm.
Chen Zemin said, by adding some auxiliary products to better play the use inside the battery, and add its mechanical function, improve the comprehensive performance, extend the service life without affecting the function. "How can this excellent diaphragm, how can you contribute to the world?" This is the first "Internet +" College Student Innovation and Entrepreneurship Competition, National College Innovation and Entrepreneurship Investment Service Alliance Wang Wei's affirmation of the project technology. Technology has competitiveness, in the future, and is also optimistic by the industry, then, how should this technology go out of the laboratory? Chen Zemin told reporters that attracting the attention of wind secretors and battery processors, and then through technology transfer or technology, letting the technology ultimately achieve scientific and technological achievements, and should be a feasible road.
"Currently, we have contacted some manufacturers and prepare for investment. "Chen Zemin said, some excited. .
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