Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries
Biomass is an abundant and valuable carbon source that can be utilised in many applications such as gas separation and energy storage. Resolving methods to process biomass cheaply and efficiently into useful carbons for such applications remains a significant area of research. Herein carbons prepare...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-07-01
|
| Series: | Carbon Trends |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667056921000304 |
| _version_ | 1819154423501291520 |
|---|---|
| author | Lisa Djuandhi Vaibhav Gaikwad Wei Wang Bruce C.C. Cowie Marzi Barghamadi Veena Sahajwalla Neeraj Sharma |
| author_facet | Lisa Djuandhi Vaibhav Gaikwad Wei Wang Bruce C.C. Cowie Marzi Barghamadi Veena Sahajwalla Neeraj Sharma |
| author_sort | Lisa Djuandhi |
| collection | DOAJ |
| description | Biomass is an abundant and valuable carbon source that can be utilised in many applications such as gas separation and energy storage. Resolving methods to process biomass cheaply and efficiently into useful carbons for such applications remains a significant area of research. Herein carbons prepared via facile pyrolysis (or thermal transformation) of waste coffee grounds at 900 °C have been used as an electrode material for lithium–sulfur (Li–S) cells, resulting in specific capacities of ~340 mAh g−1 at 0.1 C after 100 cycles and coulombic efficiencies of >98% at 1 C even after 100 cycles. Cells using these pyrolysed coffee grounds in the electrode mixture are observed to exhibit a significant improvement in cyclability compared to a standard Li–S cell configuration utilising only carbon black as the electrode carbon source. This markedly improved cell cyclability is correlated to ex situ X-ray Absorption Near-Edge Structure (XANES) spectroscopic data, which provides useful insight into the evolution of sulfur, carbon and fluorinated species on the electrode surface over multiple electrochemical cycles. |
| first_indexed | 2024-12-22T15:20:51Z |
| format | Article |
| id | doaj.art-cdf59079a092433994235ea33ab2a3b4 |
| institution | Directory Open Access Journal |
| issn | 2667-0569 |
| language | English |
| last_indexed | 2024-12-22T15:20:51Z |
| publishDate | 2021-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbon Trends |
| spelling | doaj.art-cdf59079a092433994235ea33ab2a3b42022-12-21T18:21:39ZengElsevierCarbon Trends2667-05692021-07-014100053Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteriesLisa Djuandhi0Vaibhav Gaikwad1Wei Wang2Bruce C.C. Cowie3Marzi Barghamadi4Veena Sahajwalla5Neeraj Sharma6School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia; CSIRO, Clayton, Victoria, AustraliaCentre for Sustainable Materials Research and Technology, SMaRT@UNSW, School of Materials Science and Engineering, UNSW Sydney, NSW 2052, Australia; Edge Environment, 39 East Esplanade, Manly NSW 2095, AustraliaCentre for Sustainable Materials Research and Technology, SMaRT@UNSW, School of Materials Science and Engineering, UNSW Sydney, NSW 2052, AustraliaAustralian Synchrotron, Clayton, Victoria 3168, AustraliaCSIRO, Clayton, Victoria, AustraliaCentre for Sustainable Materials Research and Technology, SMaRT@UNSW, School of Materials Science and Engineering, UNSW Sydney, NSW 2052, AustraliaSchool of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia; Corresponding author.Biomass is an abundant and valuable carbon source that can be utilised in many applications such as gas separation and energy storage. Resolving methods to process biomass cheaply and efficiently into useful carbons for such applications remains a significant area of research. Herein carbons prepared via facile pyrolysis (or thermal transformation) of waste coffee grounds at 900 °C have been used as an electrode material for lithium–sulfur (Li–S) cells, resulting in specific capacities of ~340 mAh g−1 at 0.1 C after 100 cycles and coulombic efficiencies of >98% at 1 C even after 100 cycles. Cells using these pyrolysed coffee grounds in the electrode mixture are observed to exhibit a significant improvement in cyclability compared to a standard Li–S cell configuration utilising only carbon black as the electrode carbon source. This markedly improved cell cyclability is correlated to ex situ X-ray Absorption Near-Edge Structure (XANES) spectroscopic data, which provides useful insight into the evolution of sulfur, carbon and fluorinated species on the electrode surface over multiple electrochemical cycles.http://www.sciencedirect.com/science/article/pii/S2667056921000304Sustainable materialsX-ray absorption near-edge structureInterface chemistryElectrochemical performance |
| spellingShingle | Lisa Djuandhi Vaibhav Gaikwad Wei Wang Bruce C.C. Cowie Marzi Barghamadi Veena Sahajwalla Neeraj Sharma Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries Carbon Trends Sustainable materials X-ray absorption near-edge structure Interface chemistry Electrochemical performance |
| title | Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries |
| title_full | Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries |
| title_fullStr | Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries |
| title_full_unstemmed | Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries |
| title_short | Pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in Li–S batteries |
| title_sort | pyrolysed coffee grounds as a conductive host agent for sulfur composite electrodes in li s batteries |
| topic | Sustainable materials X-ray absorption near-edge structure Interface chemistry Electrochemical performance |
| url | http://www.sciencedirect.com/science/article/pii/S2667056921000304 |
| work_keys_str_mv | AT lisadjuandhi pyrolysedcoffeegroundsasaconductivehostagentforsulfurcompositeelectrodesinlisbatteries AT vaibhavgaikwad pyrolysedcoffeegroundsasaconductivehostagentforsulfurcompositeelectrodesinlisbatteries AT weiwang pyrolysedcoffeegroundsasaconductivehostagentforsulfurcompositeelectrodesinlisbatteries AT brucecccowie pyrolysedcoffeegroundsasaconductivehostagentforsulfurcompositeelectrodesinlisbatteries AT marzibarghamadi pyrolysedcoffeegroundsasaconductivehostagentforsulfurcompositeelectrodesinlisbatteries AT veenasahajwalla pyrolysedcoffeegroundsasaconductivehostagentforsulfurcompositeelectrodesinlisbatteries AT neerajsharma pyrolysedcoffeegroundsasaconductivehostagentforsulfurcompositeelectrodesinlisbatteries |