Abstract
Iron pyrite (FeS2) is an interesting mineral in the transition metal dichalcogenide group due to its high abundance in the earth's crust which can be used for various electrochemical energy storage applications, such as batteries and supercapacitors; however, it suffers from low rate capability and poor cycle performance, which hampers its use from large-scale commercial applications. In the present study, iron disulfide microspheres anchored onto a reduced graphene oxide matrix (rGO-FeS2 hybrid) were grown using a superficial hydrothermal method. For comparison, rGO-free iron disulfide material was synthesized under the same hydrothermal conditions, and uniformly distributed FeS2 micro-size flowers were formed. The energy storage capacity of both electroactive materials (FeS2 and rGO-FeS2 hybrid material) was tested for supercapacitor applications in a symmetric cell configuration. The pristine FeS2 microflower electrode exhibited an areal capacitance of 70.98 mF cm−2 at 5 mV s−1. On the other hand, the rGO-FeS2 hybrid microsphere electrode exhibited an enhanced areal capacitance of 112.41 mF cm−2 at the same scan rate with an excellent capacitance retention of 90% over 10,000 cycles. The improved electrochemical performance of the rGO-FeS2 hybrid material is due mainly to its improved electrical conductivity, high surface area indicating an enhanced electron, and ion transfer mechanism. This study suggests that the rGO-FeS2 hybrid electrode material has potential applications in energy storage devices.
| Original language | English |
|---|---|
| Pages (from-to) | 191-200 |
| Number of pages | 10 |
| Journal | Journal of Industrial and Engineering Chemistry |
| Volume | 71 |
| DOIs | |
| Publication status | Published - 2019 Mar 25 |
| Externally published | Yes |
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Keywords
- Areal capacitance
- Electrochemical energy storage
- Hydrothermal method
- rGO-FeS
- Supercapacitors
ASJC Scopus subject areas
- Chemical Engineering(all)
Cite this
Facile synthesis of pristine FeS2 microflowers and hybrid rGO-FeS2 microsphere electrode materials for high performance symmetric capacitors. / Balakrishnan, Balamuralitharan; Balasingam, Suresh Kannan; Sivalingam Nallathambi, Karthick; Ramadoss, Ananthakumar; Kundu, Manab; Bak, Jin Soo; Cho, In Ho; Kandasamy, Prabakar; Jun, Yongseok; Kim, Hee Je.
In: Journal of Industrial and Engineering Chemistry, Vol. 71, 25.03.2019, p. 191-200.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Facile synthesis of pristine FeS2 microflowers and hybrid rGO-FeS2 microsphere electrode materials for high performance symmetric capacitors
AU - Balakrishnan, Balamuralitharan
AU - Balasingam, Suresh Kannan
AU - Sivalingam Nallathambi, Karthick
AU - Ramadoss, Ananthakumar
AU - Kundu, Manab
AU - Bak, Jin Soo
AU - Cho, In Ho
AU - Kandasamy, Prabakar
AU - Jun, Yongseok
AU - Kim, Hee Je
PY - 2019/3/25
Y1 - 2019/3/25
N2 - Iron pyrite (FeS2) is an interesting mineral in the transition metal dichalcogenide group due to its high abundance in the earth's crust which can be used for various electrochemical energy storage applications, such as batteries and supercapacitors; however, it suffers from low rate capability and poor cycle performance, which hampers its use from large-scale commercial applications. In the present study, iron disulfide microspheres anchored onto a reduced graphene oxide matrix (rGO-FeS2 hybrid) were grown using a superficial hydrothermal method. For comparison, rGO-free iron disulfide material was synthesized under the same hydrothermal conditions, and uniformly distributed FeS2 micro-size flowers were formed. The energy storage capacity of both electroactive materials (FeS2 and rGO-FeS2 hybrid material) was tested for supercapacitor applications in a symmetric cell configuration. The pristine FeS2 microflower electrode exhibited an areal capacitance of 70.98 mF cm−2 at 5 mV s−1. On the other hand, the rGO-FeS2 hybrid microsphere electrode exhibited an enhanced areal capacitance of 112.41 mF cm−2 at the same scan rate with an excellent capacitance retention of 90% over 10,000 cycles. The improved electrochemical performance of the rGO-FeS2 hybrid material is due mainly to its improved electrical conductivity, high surface area indicating an enhanced electron, and ion transfer mechanism. This study suggests that the rGO-FeS2 hybrid electrode material has potential applications in energy storage devices.
AB - Iron pyrite (FeS2) is an interesting mineral in the transition metal dichalcogenide group due to its high abundance in the earth's crust which can be used for various electrochemical energy storage applications, such as batteries and supercapacitors; however, it suffers from low rate capability and poor cycle performance, which hampers its use from large-scale commercial applications. In the present study, iron disulfide microspheres anchored onto a reduced graphene oxide matrix (rGO-FeS2 hybrid) were grown using a superficial hydrothermal method. For comparison, rGO-free iron disulfide material was synthesized under the same hydrothermal conditions, and uniformly distributed FeS2 micro-size flowers were formed. The energy storage capacity of both electroactive materials (FeS2 and rGO-FeS2 hybrid material) was tested for supercapacitor applications in a symmetric cell configuration. The pristine FeS2 microflower electrode exhibited an areal capacitance of 70.98 mF cm−2 at 5 mV s−1. On the other hand, the rGO-FeS2 hybrid microsphere electrode exhibited an enhanced areal capacitance of 112.41 mF cm−2 at the same scan rate with an excellent capacitance retention of 90% over 10,000 cycles. The improved electrochemical performance of the rGO-FeS2 hybrid material is due mainly to its improved electrical conductivity, high surface area indicating an enhanced electron, and ion transfer mechanism. This study suggests that the rGO-FeS2 hybrid electrode material has potential applications in energy storage devices.
KW - Areal capacitance
KW - Electrochemical energy storage
KW - Hydrothermal method
KW - rGO-FeS
KW - Supercapacitors
UR - http://www.scopus.com/inward/record.url?scp=85057233549&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85057233549&partnerID=8YFLogxK
U2 - 10.1016/j.jiec.2018.11.022
DO - 10.1016/j.jiec.2018.11.022
M3 - Article
AN - SCOPUS:85057233549
VL - 71
SP - 191
EP - 200
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
SN - 1226-086X
ER -