公开(公告)号：WO2018038957A1

公开(公告)日：2018-03-01

申请号：PCT/US2017/046776

申请日：2017-08-14

申请人： ENERMAT TECHNOLGIES, INC.

发明人： KORATKAR, Nikhil ,  MUKHERJEE, Rahul ,  SINGH, Eklavya

IPC分类号： H01M4/13 ,  H01M4/131 ,  H01M4/36 ,  H01M4/62 ,  H01M4/139 ,  H01M4/04 ,  H01M10/052

CPC分类号： H01M4/387 ,  H01M4/0404 ,  H01M4/0435 ,  H01M4/0459 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/364 ,  H01M4/38 ,  H01M4/382 ,  H01M4/386 ,  H01M4/485 ,  H01M4/587 ,  H01M4/622 ,  H01M4/625 ,  H01M10/052 ,  H01M10/446 ,  Y02T10/7011

摘要： The disclosed technology generally relates to electrodes for secondary batteries, and more particularly to electrodes for secondary batteries having graphene oxide (GO) sheets. In one aspect, an electrode for a secondary battery includes a current collector having coated thereon an active material. The active material includes graphite microparticles intermixed with nanoparticles or microparticles, where the nanoparticles or microparticles comprises silicon, silicon monoxide, silicon dioxide, tin, tin oxide, germanium, aluminum or combinations thereof. The graphite microparticles have a mean cross-sectional dimension in a range of about 1 micron to about 200 microns. The electrode additionally includes a plurality of contiguous graphene oxide (GO) sheets formed over the active material, wherein the GO sheets have a mean carbon-to-oxygen ratio of about 2:1 to about 20:1, wherein each of the GO sheets contacts at least another of the GO sheets, such that the GO sheets generally encapsulate the active material to provide cohesion and mechanical stability thereto.

摘要翻译： 所公开的技术一般涉及用于二次电池的电极，并且更具体地涉及用于具有氧化石墨烯（GO）片材的二次电池的电极。 一方面，用于二次电池的电极包括其上涂覆有活性材料的集电器。 活性材料包括与纳米颗粒或微米颗粒混合的石墨微粒，其中纳米颗粒或微米颗粒包含硅，一氧化硅，二氧化硅，锡，氧化锡，锗，铝或其组合。 石墨微粒的平均横截面尺寸在约1微米至约200微米的范围内。 该电极另外包括在活性材料上形成的多个连续的氧化石墨烯（GO）片，其中该GO片具有约2：1-约20：1的平均碳 - 氧比，其中每个GO片 接触至少另一个GO片材，使得GO片材通常包封活性材料以向其提供内聚力和机械稳定性。