Polymeric ion traps for suppressing or minimizing transition metal ions and dendrite formation or growth in lithium-ion batteries
申请人:GM Global Technology Operations LLC
公开号:US10581119B2
公开(公告)日:2020-03-03
Electrochemical cells that cycle lithium ions and methods for suppressing or minimizing dendrite formation are provided. The electrochemical cells include a positive electrode, a negative electrode, and a separator disposed therebetween. At least one transition metal ion-trapping moiety, including one or more polymers functionalized with one or more trapping groups, may be included within the electrochemical cell as a coating, pore filler, substitute pendant group, or binder. The one or more trapping groups may be selected from the group consisting of: crown ethers, siderophores, bactins, ortho-phenanthroline, iminodiacetic acid dilithium salt, oxalates malonates, fumarates, succinates, itaconates, phosphonates, and combinations thereof, and may bind to metal ions found within the electrochemical cell to minimize or suppress formation of dendrite protrusions on the negative electrode.
本文提供了可循环锂离子的电化学电池以及抑制或尽量减少枝晶形成的方法。电化学电池包括一个正电极、一个负电极和一个置于其间的隔膜。至少一种过渡金属离子捕获分子,包括一种或多种用一个或多个捕获基团官能化的聚合物,可作为涂层、孔隙填充物、替代悬垂基团或粘合剂包含在电化学电池中。一个或多个捕集基团可选自冠醚、苷元、菌素、原菲罗啉、亚氨基二乙酸二锂盐、草酸盐丙二酸盐、富马酸盐、琥珀酸盐、伊他康酸盐、膦酸盐及其组合,并可与电化学电池中的金属离子结合,以减少或抑制负极上树枝状突起的形成。