-
公开(公告)号：US20240313263A1
公开(公告)日：2024-09-19
申请号：US18259300
申请日：2021-12-16
发明人： Shiguang Hu , Yunxian Qian , Chaowei Cao , Pengkai Guo , Xiaoxia Xiang , Chi Wang , Shuhuai Xiang , Qun Chen , Yonghong Deng
IPC分类号： H01M10/0567 , C07D411/14 , H01M4/02 , H01M4/131 , H01M4/525 , H01M10/0525
CPC分类号： H01M10/0567 , C07D411/14 , H01M4/131 , H01M4/525 , H01M10/0525 , H01M2004/028 , H01M2300/0025
摘要： A lithium-ion battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode material layer, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material includes LiNixCoyMnzL(1-x-y-2)O2, where L is Al, Sr, Mg. Ti, Ca, Zr, Zn, Si, Cu, V or Fe, 0.5≤x≤1, 0≤y≤0.5, 0≤z≤0.5, 0≤x+y+z≤1, and an upper limit voltage of the lithium-ion battery is ≥4.2 V. The non-aqueous electrolyte includes a solvent, an electrolyte salt and a compound represented by formula 1: A-D-B-E-C, Formula 1. Based on a total mass of the non-aqueous electrolyte as 100%, the compound represented by the formula 1 is added in an amount of 0.01 to 5.0%.
-
公开(公告)号：US20190103633A1
公开(公告)日：2019-04-04
申请号：US16205258
申请日：2018-11-30
发明人： Qiao Shi , Shiguang Hu , Qun Chen , Li Wang , Zhou He , Jiaojiao Yun
IPC分类号： H01M10/0567 , H01M10/0525 , H01M10/0569 , H01M4/505 , H01M4/525
摘要： A lithium-ion battery non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte comprises at least one selected from the compounds represented by structural formula I and II; in formula I, R1 and R2 are independently selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms; in formula II, R3 is selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms. The compound represented by formula I or II is added in the electrolyte; the compound contains unsaturated bond(s) and hexafluorisopropyl; the unsaturated bond(s) form passivation film on cathode and anode surfaces to inhibit decomposition of the electrolyte on the cathode&anode surface and damage of the cathode material structure; moreover, the polymerization degree of unsaturated bond(s) can be inhibited to some extent due to steric hindrance relationship of fluoroisopropyl functional groups, so as to improve high-temperature performance of the lithium-ion battery while guaranteeing low-temperature performance.
-
公开(公告)号：US20230411689A1
公开(公告)日：2023-12-21
申请号：US18034377
申请日：2021-10-28
发明人： Chaowei Cao , Chi Wang , Qun Chen , Shiguang Hu
IPC分类号： H01M10/0567 , H01M10/0525
CPC分类号： H01M10/0567 , H01M10/0525 , H01M2300/0025
摘要： The present application belongs to the technical field of new energy, in particular to a non-aqueous electrolyte for a lithium ion battery and a lithium ion battery. The non-aqueous electrolyte for a lithium ion battery comprises a non-aqueous organic solvent, a lithium salt, and a spiro compound represented by Structural Formula 1. The compound represented by Structural Formula 1 has the characteristic of sulfonate additives to improve high-temperature storage performance of battery, and also has the characteristic of sulfate additives to improve high-temperature cycle performance of battery. A passivation film is deposited on the surface of positive electrode, and functional group X is further crosslinked to make the coated passivation film more compact and stable, which can effectively improve the electrochemical performance of the electrode, the storage performance and self-discharge performance of the battery.
-
公开(公告)号：US11362369B2
公开(公告)日：2022-06-14
申请号：US16205258
申请日：2018-11-30
发明人： Qiao Shi , Shiguang Hu , Qun Chen , Li Wang , Zhou He , Jiaojiao Yun
IPC分类号： H01M10/0567 , H01M10/0525 , H01M10/0569 , H01M4/505 , H01M4/02 , H01M4/525
摘要： A lithium-ion battery non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte comprises at least one selected from the compounds represented by structural formula I and II; in formula I, R1 and R2 are independently selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms; in formula II, R3 is selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms. The compound represented by formula I or II is added in the electrolyte; the compound contains unsaturated bond(s) and hexafluorisopropyl; the unsaturated bond(s) form passivation film on cathode and anode surfaces to inhibit decomposition of the electrolyte on the cathode & anode surface and damage of the cathode material structure; moreover, the polymerization degree of unsaturated bond(s) can be inhibited to some extent due to steric hindrance relationship of fluoroisopropyl functional groups, so as to improve high-temperature performance of the lithium-ion battery while guaranteeing low-temperature performance.
-
公开(公告)号：US10530016B2
公开(公告)日：2020-01-07
申请号：US15557788
申请日：2015-12-24
发明人： Qiao Shi , Qun Chen , Shiguang Hu , Qi Huang , Xue Zhou
IPC分类号： H01M10/42 , H01M10/0525 , H01M10/0567 , H01M10/0568 , H01M4/525 , H01M10/0569
摘要： An electrolyte for a lithium-ion battery and a lithium-ion battery. The electrolyte for a lithium-ion battery comprises a non-aqueous organic solvent, a lithium salt, and an electrolyte additive. The additive is selected from compounds of formula 1, wherein R1 is selected from unsaturated alkyls having three to six carbon atoms, and R2 is selected from alkylenes having two to five carbon atoms. Because the molecular structure of the additive comprises both unsaturated carbon-carbon bonds and cyanos, polymerization can occur on an electrode surface to form a compound containing multiple cyanos. The compound can be complexed with metal ions on a surface of a cathode material, thereby inhibiting electrolyte decomposition on an electrode surface to improve high-temperature storage and cyclability of a battery.
-
-
-
-
搜索结果
5 条记录 (耗时 0.014 秒)
