evaluation
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Run into the paper statistics, helpless. On Qimo, I saw that Dr.Tong company provided the assistance of thesis statistics, and with the guidance and assistance of the doctor's teacher, I ran smoothly to get the results. Thank Dr.Tong for his high-level service.
Mr. Lin
from: tainan
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Dr. Li
from: taoyuan
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Dr. Li
from: Kaohsiung
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Previously, a local statistics company in Hong Kong was entrusted, but it failed to do a good job in medical statistics. In my anxiety, I saw the doctor teacher of Dr.Tong statistics company provide statistical running and guidance, and sent the data and requirements to the doctor teacher. With the efforts of the doctor teacher, the analysis results were successfully made. I feel that Taiwan's statistics companies are more professional and the fees are reasonable.
Dr. Li
from: hongkong
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Mr. Lin
from: yunlin
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When I met the difficulties in the statistical analysis of the pre-test and post-test of the thesis questionnaire, I couldn't solve them all the time. On Qimo, I saw that the doctoral teacher of Dr.Tong statistics company provided the tutoring service of thesis statistics, and sent the information and requirements to the doctoral teacher. With the help and guidance of the teacher, I got the results. Thank you very much for the tutoring service of the doctoral teacher of Dr.Tong statistics company There are two difficulties.
Miss Liu
from: Kaohsiung
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Miss Zeng
from: london
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Mr. Zhang
from: taizhong
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Dr. Song
from: Kaohsiung
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| 2021-03-24 18:46:11 | onclick： | Great progress has been made in the industrial technology of high performance carbon |
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On March 24, the reporter learned from Qingdao Institute of bioenergy and process, Chinese Academy of Sciences that China's high-performance carbon based lithium-ion capacitor industrialization technology has made an important breakthrough.
Lithium ion capacitor is a new type of energy storage device between super capacitor and lithium-ion battery. It has the advantages of high energy density, high power density, fast charging and discharging, long cycle life and high safety performance. It has a wide application prospect in the fields of rail transit, energy recovery and accelerating start of electric vehicles, new energy power generation, aerospace, national defense and military .
Due to the complex technology and high cost of lithium-ion capacitor, up to now, the key industrial technology and high-performance raw material technology are basically in the hands of foreign enterprises, such as Maxwell (which has been acquired by Tesla), act, JM energy, etc. Wu Jianfei, a researcher at the Institute, said that if science and technology want to develop and the country wants to be rich and strong, it is necessary to strive to achieve independent and controllable key core technologies.
The reporter learned from the interview that at present, relying on Qingdao Institute of energy, Chinese Academy of Sciences and with the joint efforts of Wu Jianfei, sun Xiaolin and other senior engineers of the Institute, the advanced energy storage materials and technology research group of the Institute has developed high-capacity and high rate positive and negative core materials, key technology of negative controllable industrial lithium pre embedding, and construction of SEI film that can repair the surface of high stability negative electrode, Advanced high-efficiency charge transfer technology of positive and negative electrodes and controllable perforated collector design technology have successfully developed carbon based lithium-ion capacitor monomer with long cycle life. The actual capacity of the monomer is 780f, and the capacity of high rate (100C) cycle is still above 95.7% (patent cn202011465356.4; cn202011465546.6).
The advanced energy storage materials and technology research group of the Institute has achieved breakthrough results in the field of lithium-ion capacitors through step-by-step practice, which has attracted the attention of domestic well-known enterprises. Wu Jianfei said that since 2020, the research group has jointly applied for key technology research projects in Shandong Province with CRRC Sifang Vehicle Research Institute, and signed a strategic cooperation agreement with Shandong Shuifa group, striving to apply lithium-ion capacitor monomer with independent intellectual property rights in rail transit, energy recovery and wind solar energy storage of household vehicles, and achieve localization of key technologies.
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