• 专利标题:   Method for reducing formation of metallic lithium on anode of lithium-ion battery, involves arranging electrolyte between anode and cathode, and coating separator-side surface of anode with graphene.
  • 专利号:   DE102016220048-A1
  • 发明人:   BAUER C, LUX S
  • 专利权人:   BAYERISCHE MOTOREN WERKE AG
  • 国际专利分类:   H01M010/0525, H01M004/13, H01M002/16
  • 专利详细信息:   DE102016220048-A1 19 Apr 2018 H01M-010/0525 201830 Pages: 8 German
  • 申请详细信息:   DE102016220048-A1 DE10220048 14 Oct 2016
  • 优先权号:   DE10220048

▎ 摘  要

NOVELTY - The method involves providing the lithium ion battery with an anode and a cathode. The anode and the cathode are separated by a separator. An electrolyte is arranged between the anode and the cathode, and the separator-side surface of the anode is coated with graphene. The metallic lithium is in the form of dendrites. The surface of the anode is configured with the cavities, and the graphene layer is extended partially outside of the cavities. The metallic lithium or a compound having metallic lithium is introduced in the cavities. USE - Method for reducing formation of metallic lithium on anode of lithium-ion battery (all claimed). ADVANTAGE - The lithium ions are reduced from the electrolyte to metallic lithium, which is incorporated in the layers of the layer structure of the graphite of the anode when charging the battery. The transport of lithium ions from the surface into the interior of the anode and there the reduction to metallic lithium is faster than the deposition of metallic lithium on the anode. Thus, the rapid transport reduces the risk of formation of dendrites on the surface of the anode as well as the risk of side reactions of metallic lithium with the electrolyte. The irreversible loss of lithium is compensated by passivation steps when formatting the battery. Thus, the reservoir is used to increase the capacity of the battery after formatting. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a lithium-ion battery; (2) a method for manufacturing lithium-ion battery; (3) an anode for lithium-ion battery; and (4) a method for manufacturing anode for lithium-ion battery.