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Device and method of forming a device

  • US 10,008,716 B2
  • Filed: 10/31/2013
  • Issued: 06/26/2018
  • Est. Priority Date: 11/02/2012
  • Status: Active Grant
First Claim
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1. A multilayer electrode comprising, in sequence, a conductive layer, a first composite electrode layer and a second composite electrode layer, each composite electrode layer comprising a particulate material suitable for use as an active material in a metal ion battery and a binder, wherein a major component of the active material of the first composite electrode layer (first major active component) is an active carbon and a major component of the active material of the second composite electrode layer (second major active component) is selected from the group consisting of silicon and tin, and whereinthe binder of the first composite electrode layer is polyvinylidene fluoride (PVDF), or a polyimide (PI), or a mixture of PVDF and PI, andthe binder of the second composite electrode layer is (i) polyacrylic acid (PAA) or a salt thereof, or (ii) carboxymethylcellulose (CMC) or a salt thereof, or (iii) styrene butadiene rubber (SBR), or (iv) a binary or tertiary mixture of two or more of (i), (ii), and (iii).

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