US 12,119,496 B2 · Composite modified layer and anode-free lithium metal battery thereof

Abstract

Present invention is related to a composite modified layer attached on a current collector comprising a lithiophilic particle being covered or coated by a polymer layer. The composite modified layer further could be coated with an additional carbon layer or artificial protective film as several suitable embodiments presented in this invention. The lithiophilic particle, such as sliver nano-particle, will firstly form a lithium-silver alloys to reduce a thermodynamic instability during the growth of lithium nuclei. The sliver nano-particle is able to be attached securely on the current collector by the polymer with high adhesion ability. The fuel cell including the composite modified layer in the present invention has higher average Coulombic efficiency and higher capacity retention.

Claims4

Dependent claims

An anode-free lithium metal battery comprises:

a current collector, wherein the current collector has a first surface and a second surface opposite the first surface;
and
a dual layer assembly attached to the first surface of the current collector,
the dual layer assembly comprising:
a composite modified layer directly attached to the first surface of the current collector, the composite modified layer comprising multiple silver nano-particles and a polydopamine layer, wherein the composite modified layer has a thickness in a range of 1-50 μm;
and
an artificial solid electrolyte interface attached on a surface of the polydopamine layer of the composite modified layer, wherein the artificial solid electrolyte interface is a graphene oxide layer.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/386,124Filed 27 Jul 2021 · us provisional application

Priority

7 Sep 2020

Published

US 2022/0077469 A110 Mar 2022

Granted

15 Oct 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

H01M 4/628
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers: inhibitors, e.g. gassing inhibitors, corrosion inhibitors
H01M 4/134
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/366
Composites: as layered products
H01M 4/405
Alloys based on alkali metals: alloys based on lithium

Composite modified layer and anode-free lithium metal battery thereof

Life of this patent

Composite modified layer and anode-free lithium metal battery thereof

Life of this patent

Abstract

Claims4