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Full-Text Articles in Physical Sciences and Mathematics
Characterization Of The Separator With Thermal-Shutdown Layer For Use In Lithium Batteries, Li Bai, Yong-Jian Huai, Xin-Ping Ai, Hai Jia
Characterization Of The Separator With Thermal-Shutdown Layer For Use In Lithium Batteries, Li Bai, Yong-Jian Huai, Xin-Ping Ai, Hai Jia
Journal of Electrochemistry
In this paper, the lithium ion battery coated with the thermal-shutdown functional layer has been introduced. The shutdown temperature of the separator could be decreased by using the melting point of thermal-shutdown functional layer. When the internal battery environment reached a critical temperature, the functional layer melted and coated the anode/separator with a non-conductive barrier, halting Li-ion transport and shutting down the cell permanently. The results showed that the functional layer did not affect the resistance, rate performance and cycle life. It was found the functional layer can significantly improve the safety of the battery when misused.
Electrochemical Performance And Reaction Mechanism Of Li3Fe2(Po4)3/C Cathode Material, Yong Xie, Gui-Ming Zhong, Zheng-Liang Gong, Yong Yang
Electrochemical Performance And Reaction Mechanism Of Li3Fe2(Po4)3/C Cathode Material, Yong Xie, Gui-Ming Zhong, Zheng-Liang Gong, Yong Yang
Journal of Electrochemistry
The cathode material of carbon coated Li3Fe2(PO4)3 (Li3Fe2(PO4)3/C) is successfully prepared by sol-gel method and ball-milling carbon coating technique. The cathode material is characterized by XRD, SEM, TEM, and in-situ XAFS techniques. XRD results indicate that the as prepared Li3Fe2(PO4)3 is of high purity and single phase, and has monoclinic structure with space group of P21/n. Electrochemical measurements show that the carbon-coated material is able to deliver a high initial discharge specific capacity of 128.6 mAh·g-1 in …