公开(公告)号：US20200020980A1

公开(公告)日：2020-01-16

申请号：US15572599

申请日：2017-08-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaojie TIAN ,  Changlong HAN ,  Feng JU ,  Cui ZHANG

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M4/58 ,  H01M10/0525

Abstract: The present application provides a lithium iron phosphate battery. The lithium iron phosphate battery comprises: positive electrode plate comprising a positive current collector and a positive electrode film provided on the surface of the positive current collector; a negative electrode plate comprising a negative current collector and a negative electrode film provided on the surface of the negative current collector; a separator provided between the positive electrode plate and the negative electrode plate; and an electrolyte comprising an organic solvent, a lithium salt and an electrolyte additive. The electrolyte additive comprises a cyclic carbonate containing a double bond and a cyclic disulfonate represented by formula I. In formula I, A and B are each independently selected from an alkylene group having 1 to 3 carbon atoms.

公开(公告)号：US20190267671A1

公开(公告)日：2019-08-29

申请号：US16410938

申请日：2019-05-13

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Ming ZHANG ,  Changlong HAN ,  Cui ZHANG ,  Xiaochong ZHOU ,  Feng JU

IPC: H01M10/0567 ,  H01M10/0525

Abstract: The present disclosure provides an electrolyte and a secondary lithium battery. The electrolyte comprises a lithium salt, an organic solvent and an additive. The additive comprises fluoroborate and lithium difluorophosphate. When the electrolyte of the present disclosure is applied to the secondary lithium battery, the secondary lithium battery can have excellent high temperature cycle performance, high temperature storage performance, low temperature discharge performance and large rate charging performance at the same time, and low temperature lithium precipitation of the secondary lithium battery can be significantly inhibited.