US 11,791,519 B2 · Biodegradable transient battery built on core-double-shell zinc microparticle networks

Abstract

A transient or biodegradable battery is provided having a filament structure that limits the speed of reaction allowing for a longer duration of battery power with a controlled current limit. In one embodiment, the filament may be constructed of zinc microparticles or nanoparticles having a thin outer insulation whereby a chemical reaction at the center core results in the progressive disintegration of the insulation revealing more core material. In one embodiment, microparticles or nanoparticles are coated with outer layers of chitosan and Al2O3 nanofilms, respectively, with designable discharge current and battery lifespan by controlling the exposed cross-sectional area of the zinc microparticle center core and the length of the filament, respectively. This novel structure of biodegradable battery provides improved control of battery life and power output, providing a promising solution to power transient medical implants.

Claims20

Dependent claims

A transient energy source comprising:

an elongate filament extending along a filament axis having
a central strand of a first battery material wherein the first battery material provides an uninterrupted electrically conductive path along the filament axis;
a sheath of an electrical insulator surrounding the central strand along the filament axis;
and
an electrical conductor communicating between a first end of the elongate filament and a second battery material;
wherein the central strand is exposed to an electrolyte at a second end opposite the first end of the elongate filament and electrically insulated between the first end and the second end to elicit a chemical reaction occurring progressively primarily along the filament axis from the second end to the first end.

3 more elements

Dependencies are inferred from the claim text.

Biodegradable transient battery built on core-double-shell zinc microparticle networks

Life of this patent

Biodegradable transient battery built on core-double-shell zinc microparticle networks

Life of this patent

Abstract

Claims20