Conductive carbon embedded beneath cathode active material for longevity of solid-state batteries

Young Woon Byeon; Sizhuo Yang; Guang Yang; Dong Min Kim; Venkata Sai Avvaru; Tofunmi Ogunfunmi; Mary Scott; Brett A. Helms; Jeffrey Urban; Haegyeom Kim

doi:10.1039/d4ta00674g

Conductive carbon embedded beneath cathode active material for longevity of solid-state batteries

Young Woon Byeon, Sizhuo Yang, Guang Yang, Dong Min Kim, Venkata Sai Avvaru, Tofunmi Ogunfunmi, Mary Scott, Brett A. Helms, Jeffrey Urban, Haegyeom Kim

Energy Storage & Conversion

Research output: Contribution to journal › Article › peer-review

Abstract

A composite structure was developed for use in all-solid-state batteries that consists of a conductive 3D reduced graphene oxide framework embedded beneath cathode active material particles. This unique structure offers significant advantages when combined with a sulfide solid electrolyte as the heterogeneous distribution of the conductive carbon in the composite cathode ensures good contact between the carbon and cathode particles for facile electron transfer while a direct contact between the carbon and sulfide solid electrolyte is avoided or minimized. This approach assists in preventing or reducing unwanted irreversible faradaic reactions. As a result, the newly developed composite of cathode particles decorated on a 3D reduced graphene oxide framework delivers higher specific capacity with improved cycling stability compared with a typical composite cathode consisting of a homogenous mixture of the cathode active material, carbon nanofibers, and sulfide solid electrolyte.

Original language	English
Pages (from-to)	8359-8369
Number of pages	11
Journal	Journal of Materials Chemistry A
Volume	12
Issue number	14
DOIs	https://doi.org/10.1039/d4ta00674g
State	Published - Mar 4 2024

Funding

This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Vehicle Technologies Office, under the Advanced Battery Materials Research (BMR) Program, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.

Funders	Funder number
Assistant Secretary for Energy Efficiency and Renewable Energy, Vehicle Technologies Office
U.S. Department of Energy	DE-AC02-05CH11231
Office of Science
Basic Energy Sciences

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abstract = "A composite structure was developed for use in all-solid-state batteries that consists of a conductive 3D reduced graphene oxide framework embedded beneath cathode active material particles. This unique structure offers significant advantages when combined with a sulfide solid electrolyte as the heterogeneous distribution of the conductive carbon in the composite cathode ensures good contact between the carbon and cathode particles for facile electron transfer while a direct contact between the carbon and sulfide solid electrolyte is avoided or minimized. This approach assists in preventing or reducing unwanted irreversible faradaic reactions. As a result, the newly developed composite of cathode particles decorated on a 3D reduced graphene oxide framework delivers higher specific capacity with improved cycling stability compared with a typical composite cathode consisting of a homogenous mixture of the cathode active material, carbon nanofibers, and sulfide solid electrolyte.",

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AU - Byeon, Young Woon

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AU - Yang, Guang

AU - Kim, Dong Min

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AU - Ogunfunmi, Tofunmi

AU - Scott, Mary

AU - Helms, Brett A.

AU - Urban, Jeffrey

AU - Kim, Haegyeom

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AB - A composite structure was developed for use in all-solid-state batteries that consists of a conductive 3D reduced graphene oxide framework embedded beneath cathode active material particles. This unique structure offers significant advantages when combined with a sulfide solid electrolyte as the heterogeneous distribution of the conductive carbon in the composite cathode ensures good contact between the carbon and cathode particles for facile electron transfer while a direct contact between the carbon and sulfide solid electrolyte is avoided or minimized. This approach assists in preventing or reducing unwanted irreversible faradaic reactions. As a result, the newly developed composite of cathode particles decorated on a 3D reduced graphene oxide framework delivers higher specific capacity with improved cycling stability compared with a typical composite cathode consisting of a homogenous mixture of the cathode active material, carbon nanofibers, and sulfide solid electrolyte.

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Conductive carbon embedded beneath cathode active material for longevity of solid-state batteries

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