Artificial solid electrolyte interface cap layer for an anode in a Li S battery system
This disclosure provides a battery including a cathode an anode positioned opposite the cathode. The anode includes a hybrid artificial solid-electrolyte interphase (A-SEI) layer encapsulating the anode. The hybrid A-SEI layer includes a first active component, a second active component disposed on the first active component, and a plurality of carbon-containing aggregates interwoven throughout the first and second active components and configured to inhibit growth of Li dendritic structures from the anode towards the cathode. A separator is positioned between the anode and the cathode. The cathode includes a porous carbon-based structure configured to expand in a presence of polysulfide (PS) shuttle within one or more portions of the battery. An electrolyte is dispersed between the anode and the cathode and in contact with both the anode and the cathode. The plurality of carbon-containing aggregates can include a polymer, which includes a cross-linked polymeric network.
1. A battery comprising:
a cathode;
a anode positioned opposite the cathode;
a separator positioned between the anode and the cathode; and
a hybrid artificial solid-electrolyte interphase (A-SEI) layer encapsulating the anode, the hybrid A-SEI layer comprising:
a first active component layer comprising polymer, wherein the polymer comprises an elastic and self-healing polymer configured to prevent direct contact between the anode and an electrolyte, and wherein the first active component layer is disposed adjacent to the separator; and
a second active component layer comprising graphene oxide configured to enable uniform Li deposition on the surface of the anode during charge cycle of the battery and disposed between the anode and the first active component layer, wherein the hybrid A-SEI layer further comprises carbon-containing aggregates interwoven throughout the first active component layer and the second active component layer, wherein the carbon-containing aggregates comprise few layer graphene (FLG) platelets joined substantially orthogonal to each other to form 3D scaffold structures.
2. The battery of claim 1 , wherein the separator is further configured to inhibit the growth of the Li dendritic structures from the anode towards the cathode.
3. The battery of claim 1 , wherein the anode comprises lithium metal anode.