公开(公告)号：US20150180023A1

公开(公告)日：2015-06-25

申请号：US14138267

申请日：2013-12-23

Applicant: GM Global Technology Operations LLC

Inventor： Xingcheng XIAO ,  Mark W. VERBRUGGE ,  John S. WANG

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/583 ,  H01M4/48 ,  H01M4/38 ,  H01M4/485

CPC classification number: H01M4/366 ,  H01M4/0402 ,  H01M4/0423 ,  H01M4/0428 ,  H01M4/48 ,  H01M4/485 ,  H01M4/582 ,  H01M4/583 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: An electroactive material for use in an electrochemical cell, like a lithium ion battery, is provided. The electroactive material comprises a multifunctional hybrid protective coating system formed over an electroactive material. The coating system includes a first oxide-based coating disposed on one or more surfaces of the electroactive material, followed by a second coating deposited via a non-aqueous process. The second coating may be a fluoride-based, nitride-based, or carbide-based coating. The first and second coatings may be applied by atomic layer deposition (ALD) to form conformal ultrathin layers over the electroactive materials. Such a multifunctional hybrid protective coating system can suppress formation of gases within the electrochemical cell and also minimize formation of solid electrolyte interface (SEI) layers on the electrode to improve battery performance. Methods for making such materials and using such materials in electrochemical cells are likewise provided.

Abstract translation: 提供了用于电化学电池中的电活性材料，如锂离子电池。 电活性材料包括在电活性材料上形成的多功能混合保护涂层系统。 涂层系统包括设置在电活性材料的一个或多个表面上的第一氧化物基涂层，随后是通过非水性方法沉积的第二涂层。 第二涂层可以是氟化物基，氮化物基或碳化物基涂层。 第一和第二涂层可以通过原子层沉积（ALD）来施加，以在电活性材料上形成保形超薄层。 这种多功能混合保护涂层系统可以抑制电化学电池内的气体的形成，并且还使电极上的固体电解质界面（SEI）层的形成最小化以改善电池性能。 同样提供了制造这种材料并在电化学电池中使用这种材料的方法。