公开(公告)号：US09331331B1

公开(公告)日：2016-05-03

申请号：US13766558

申请日：2013-02-13

Applicant: Applied Materials, Inc.

Inventor： Fei Wang ,  Subramanya P. Herle ,  Joseph G. Gordon ,  GirishKumar Gopalakrishnan Nair

IPC: B05D5/12 ,  H01M4/04 ,  H01M4/36

CPC classification number: H01M4/0419 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M4/661 ,  H01M2004/021

Abstract: The present invention generally relates to using water-based binders for high voltage cathode materials, such as LMNO (spinel LiNi0.5Mn1.5O4), in Li-ion batteries. An example of a water compatible polymer binder according to some embodiments of the present invention is a combination of CMC (carboxymethylcellulose) and a second water compatible polymer that produce coatings of adequate thickness and loading (mAh/cm2). A method of forming a cathode for a Li-ion battery may include: preparing an aqueous solution of CMC; mixing together LMNO and carbon black; combining the LMNO and carbon black mixture with the CMC solution, an aqueous polyacrylic solution and distilled water, and mixing to form a slurry; coating a conductive substrate with the slurry; and drying the coated substrate, forming a cathode layer on the substrate. Furthermore, this invention describes a cathode for Li-ion batteries and tools for carrying out the above method.

Abstract translation: 本发明一般涉及使用锂离子电池中的高电压阴极材料如LMNO（尖晶石LiNi0.5Mn1.5O4）的水性粘合剂。 根据本发明的一些实施方案的水相容性聚合物粘合剂的实例是CMC（羧甲基纤维素）和产生足够厚度和负载（mAh / cm 2）的涂层的第二水相容性聚合物的组合。 形成锂离子电池阴极的方法可以包括：制备CMC的水溶液; 混合在一起的LMNO和炭黑; 将LMNO和炭黑混合物与CMC溶液，水性聚丙烯酸溶液和蒸馏水结合，混合形成浆料; 用浆料涂覆导电基材; 并干燥涂覆的基底，在基底上形成阴极层。 此外，本发明描述了用于实施上述方法的用于锂离子电池的阴极和工具。